Powered by Deep Web Technologies
Note: This page contains sample records for the topic "microscopic double-slit experiment" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


1

A Microscopic Double-Slit Experiment  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

A Microscopic Double-Slit A Microscopic Double-Slit Experiment A Microscopic Double-Slit Experiment Print Wednesday, 29 February 2012 00:00 Two centuries ago, Thomas Young performed the classic demonstration of the wave nature of light. He placed a screen with two tiny slits in front of a single light source, effectively converting it into a two-centered source. On a second screen far away, he saw a pattern of light and dark diffraction fringes, a well-known hallmark of wave interference. Along with later studies using particles instead of light, the experiment played a crucial role in establishing the validity of wave-particle duality, a puzzling concept that has ultimately become central to the interpretation of complementarity in quantum mechnanics. In a new twist on this classic experiment, the double slit (with light waves) has been replaced by a diatomic molecule (with electron waves). At ALS Beamline 10.0.1, researchers have shown that diatomic molecules can serve as two-center emitters of electron waves and that traces of electron-wave interference can be directly observed in precise measurements of vibrationally resolved photoionization spectra.

2

A Microscopic Double-Slit Experiment  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

A Microscopic Double-Slit Experiment Print A Microscopic Double-Slit Experiment Print Two centuries ago, Thomas Young performed the classic demonstration of the wave nature of light. He placed a screen with two tiny slits in front of a single light source, effectively converting it into a two-centered source. On a second screen far away, he saw a pattern of light and dark diffraction fringes, a well-known hallmark of wave interference. Along with later studies using particles instead of light, the experiment played a crucial role in establishing the validity of wave-particle duality, a puzzling concept that has ultimately become central to the interpretation of complementarity in quantum mechnanics. In a new twist on this classic experiment, the double slit (with light waves) has been replaced by a diatomic molecule (with electron waves). At ALS Beamline 10.0.1, researchers have shown that diatomic molecules can serve as two-center emitters of electron waves and that traces of electron-wave interference can be directly observed in precise measurements of vibrationally resolved photoionization spectra.

3

A Microscopic Double-Slit Experiment  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

A Microscopic Double-Slit Experiment Print A Microscopic Double-Slit Experiment Print Two centuries ago, Thomas Young performed the classic demonstration of the wave nature of light. He placed a screen with two tiny slits in front of a single light source, effectively converting it into a two-centered source. On a second screen far away, he saw a pattern of light and dark diffraction fringes, a well-known hallmark of wave interference. Along with later studies using particles instead of light, the experiment played a crucial role in establishing the validity of wave-particle duality, a puzzling concept that has ultimately become central to the interpretation of complementarity in quantum mechnanics. In a new twist on this classic experiment, the double slit (with light waves) has been replaced by a diatomic molecule (with electron waves). At ALS Beamline 10.0.1, researchers have shown that diatomic molecules can serve as two-center emitters of electron waves and that traces of electron-wave interference can be directly observed in precise measurements of vibrationally resolved photoionization spectra.

4

Young’s double-slit interference experiment with electrons  

Science Journals Connector (OSTI)

In this short Note we report a method for producing samples containing two nano-sized slits suitable for demonstrating to undergraduate and graduate students the double-slit electron interference experiment in a conventional transmission electron microscope.

S. Frabboni; G. C. Gazzadi; G. Pozzi

2007-01-01T23:59:59.000Z

5

A Microscopic Double-Slit Experiment  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

characteristics of extreme beam stability, powerful photon flux, and high resolving power offered at ALS Beamline 10.0.1 allowed the research team to access the underlying...

6

The double-slit and the EPR experiments: A paradox-free kinematic description  

E-Print Network [OSTI]

The paradoxes of the double-slit and the EPR experiments with particles are shown to originate in the implicit assumption that the particles are always located in the classical space. It is demonstrated that there exists a natural substitute for this assumption that provides a method of resolving the paradoxes.

Alexey A. Kryukov

2007-08-22T23:59:59.000Z

7

The H2 Double-Slit Experiment: Where Quantum and Classical Physics Meet  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

The H2 Double-Slit Experiment: The H2 Double-Slit Experiment: Where Quantum and Classical Physics Meet The H2 Double-Slit Experiment: Where Quantum and Classical Physics Meet Print Wednesday, 27 February 2008 00:00 For the first time, an international research team carried out a double-slit experiment in H2, the smallest and simplest molecule. Thomas Young's original experiment in 1803 passed light through two slits cut in a solid thin plate. In the groundbreaking experiment performed at ALS Beamlines 4.0 and 11.0.1, the researchers used electrons instead of light and the nuclei of the hydrogen molecule as the slits. The experiment revealed that only one "observing" electron suffices to induce the emergence of classical properties such as loss of coherence. Double photoionization of H2. Left: Circularly polarized light comes from the top. All angular distributions are in the plane perpendicular to the photon propagation vector: Φe-mol is the angle of the fast electron's trajectory to the molecular axis; Φe-e is the angle between both electron trajectories. Center: Photoionization by circularly polarized light launches a coherent spherical photoelectron wave at each nucleus of the molecule; the light propagates into the plane. Right: Measured electron angular distribution Φe-mol of the faster electron (E1) from double photoionization of H2 by circularly polarized light. The orientation of the molecule is horizontal. Light propagates into the plane of the figure, the molecule is fixed ±10° within the plane shown, Eϒ = 240 eV, and the energy of the slow electron E2 = 0 to 5 eV, resulting in E1 = 185 to 190 eV.

8

Proposed experiment of which-way detection by longitudinal momentum transfer in Young's double slit experiment  

E-Print Network [OSTI]

The momentum of a photon may reveal the answer to the "which way" problem of Young's double slit experiments. A photon passing through the boundary between two media, in which a photon travels at different velocities, undergoes a momentum change according to the law of conservation of momentum. The momentum of the photon is transferred locally to the medium, and the boundary between the media receives stress, which determines the photon trajectory. An experiment is performed using a crystal plate that can transform the stress to electric charge. We are able to detect the electric charge after the detection of the photon on the screen, and control the sensitivity of photon detection. By means of this proposed experiment it is determined whether or not an attempt to detect the "which way" of photon travel destroys the interference patterns.

Masanori Sato

2004-06-01T23:59:59.000Z

9

The H2 Double-Slit Experiment: Where Quantum and Classical Physics Meet  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

The H2 Double-Slit Experiment: Where Quantum and Classical Physics Meet Print The H2 Double-Slit Experiment: Where Quantum and Classical Physics Meet Print For the first time, an international research team carried out a double-slit experiment in H2, the smallest and simplest molecule. Thomas Young's original experiment in 1803 passed light through two slits cut in a solid thin plate. In the groundbreaking experiment performed at ALS Beamlines 4.0 and 11.0.1, the researchers used electrons instead of light and the nuclei of the hydrogen molecule as the slits. The experiment revealed that only one "observing" electron suffices to induce the emergence of classical properties such as loss of coherence. Double photoionization of H2. Left: Circularly polarized light comes from the top. All angular distributions are in the plane perpendicular to the photon propagation vector: Φe-mol is the angle of the fast electron's trajectory to the molecular axis; Φe-e is the angle between both electron trajectories. Center: Photoionization by circularly polarized light launches a coherent spherical photoelectron wave at each nucleus of the molecule; the light propagates into the plane. Right: Measured electron angular distribution Φe-mol of the faster electron (E1) from double photoionization of H2 by circularly polarized light. The orientation of the molecule is horizontal. Light propagates into the plane of the figure, the molecule is fixed ±10° within the plane shown, Eϒ = 240 eV, and the energy of the slow electron E2 = 0 to 5 eV, resulting in E1 = 185 to 190 eV.

10

The H2 Double-Slit Experiment: Where Quantum and Classical Physics Meet  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

The H2 Double-Slit Experiment: Where Quantum and Classical Physics Meet Print The H2 Double-Slit Experiment: Where Quantum and Classical Physics Meet Print For the first time, an international research team carried out a double-slit experiment in H2, the smallest and simplest molecule. Thomas Young's original experiment in 1803 passed light through two slits cut in a solid thin plate. In the groundbreaking experiment performed at ALS Beamlines 4.0 and 11.0.1, the researchers used electrons instead of light and the nuclei of the hydrogen molecule as the slits. The experiment revealed that only one "observing" electron suffices to induce the emergence of classical properties such as loss of coherence. Double photoionization of H2. Left: Circularly polarized light comes from the top. All angular distributions are in the plane perpendicular to the photon propagation vector: Φe-mol is the angle of the fast electron's trajectory to the molecular axis; Φe-e is the angle between both electron trajectories. Center: Photoionization by circularly polarized light launches a coherent spherical photoelectron wave at each nucleus of the molecule; the light propagates into the plane. Right: Measured electron angular distribution Φe-mol of the faster electron (E1) from double photoionization of H2 by circularly polarized light. The orientation of the molecule is horizontal. Light propagates into the plane of the figure, the molecule is fixed ±10° within the plane shown, Eϒ = 240 eV, and the energy of the slow electron E2 = 0 to 5 eV, resulting in E1 = 185 to 190 eV.

11

The H2 Double-Slit Experiment: Where Quantum and Classical Physics Meet  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

The H2 Double-Slit Experiment: Where Quantum and Classical Physics Meet Print The H2 Double-Slit Experiment: Where Quantum and Classical Physics Meet Print For the first time, an international research team carried out a double-slit experiment in H2, the smallest and simplest molecule. Thomas Young's original experiment in 1803 passed light through two slits cut in a solid thin plate. In the groundbreaking experiment performed at ALS Beamlines 4.0 and 11.0.1, the researchers used electrons instead of light and the nuclei of the hydrogen molecule as the slits. The experiment revealed that only one "observing" electron suffices to induce the emergence of classical properties such as loss of coherence. Double photoionization of H2. Left: Circularly polarized light comes from the top. All angular distributions are in the plane perpendicular to the photon propagation vector: Φe-mol is the angle of the fast electron's trajectory to the molecular axis; Φe-e is the angle between both electron trajectories. Center: Photoionization by circularly polarized light launches a coherent spherical photoelectron wave at each nucleus of the molecule; the light propagates into the plane. Right: Measured electron angular distribution Φe-mol of the faster electron (E1) from double photoionization of H2 by circularly polarized light. The orientation of the molecule is horizontal. Light propagates into the plane of the figure, the molecule is fixed ±10° within the plane shown, Eϒ = 240 eV, and the energy of the slow electron E2 = 0 to 5 eV, resulting in E1 = 185 to 190 eV.

12

Essential state of the electromagnetic field and the double-slit experiment  

E-Print Network [OSTI]

A new class of generalized solutions related to the essential spectrum of linear Maxwell's equations is presented. The essential modes are given in terms of normalized singular Weyl's sequences, whose square represents Dirac's delta functions in spatial and angular frequency domains. The action integral associated with essential modes is well-defined. We claim that these modes represent the collapsed state of the electromagnetic field and, with some additional assumptions on the conservation of action, are suitable for describing the double-slit experiment in accordance with the orthodox point of view.

Budko, N V; Budko, Neil V.; Samokhin, Alexander B.

2006-01-01T23:59:59.000Z

13

Essential state of the electromagnetic field and the double-slit experiment  

E-Print Network [OSTI]

A new class of generalized solutions related to the essential spectrum of linear Maxwell's equations is presented. The essential modes are given in terms of normalized singular Weyl's sequences, whose square represents Dirac's delta functions in spatial and angular frequency domains. The action integral associated with essential modes is well-defined. We claim that these modes represent the collapsed state of the electromagnetic field and, with some additional assumptions on the conservation of action, are suitable for describing the double-slit experiment in accordance with the orthodox point of view.

Neil V. Budko; Alexander B. Samokhin

2006-10-02T23:59:59.000Z

14

Measurement in the de Broglie-Bohm interpretation: Double-slit, Stern-Gerlach and EPR-B  

E-Print Network [OSTI]

Measurement in the de Broglie-Bohm interpretation: Double-slit, Stern-Gerlach and EPR-B Michel important experiments of quantum measurement: double-slit, Stern-Gerlach and EPR-B. First, we present the EPR-B experiment, the Bohm version of the Einstein-Podolsky-Rosen exper- iment. Its theoretical

Recanati, Catherine

15

Student's difficulties with the theory of double-slit interference  

E-Print Network [OSTI]

developed abstract thinking abilities [3, 4]. The remainder are unable to learn physics by listening arrangement for theoretical treatment of double-slit interference. Figure 2. The mechanical device

Planin�iè, Gorazd

16

Experimental demonstration of tunable directional excitation of surface plasmon polaritons with a subwavelength metallic double slit  

SciTech Connect (OSTI)

We demonstrate experimentally the directional excitation of surface plasmon polaritons (SPPs) on a metal film by a subwavelength double slit under backside illumination, based on the interference of SPPs generated by the two slits. By varying the incident angle, the SPPs can be tunably directed into two opposite propagating directions with a predetermined splitting ratio. Under certain incident angle, unidirectional SPP excitation can be achieved. This compact directional SPP coupler is potentially useful for many on-chip applications. As an example, we show the integration of the double-slit couplers with SPP Bragg mirrors, which can effectively realize selective coupling of SPPs into different ports in an integrated plasmonic chip.

Li Xiaowei [Department of Precision Instruments, State Key Laboratory of Precision Measurement Technology and Instruments, Tsinghua University, Beijing 100084 (China); Tsinghua-Foxconn Nanotechnology Research Center, Tsinghua University, Beijing 100084 (China); Tan Qiaofeng; Jin Guofan [Department of Precision Instruments, State Key Laboratory of Precision Measurement Technology and Instruments, Tsinghua University, Beijing 100084 (China); Bai Benfeng [Department of Precision Instruments, State Key Laboratory of Precision Measurement Technology and Instruments, Tsinghua University, Beijing 100084 (China); Tsinghua-Foxconn Nanotechnology Research Center, Tsinghua University, Beijing 100084 (China); Department of Physics and Mathematics, University of Eastern Finland, P.O. Box 111, FI-80101 Joensuu (Finland)

2011-06-20T23:59:59.000Z

17

The H2 Double-Slit Experiment: Where Quantum and Classical Physics...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

electron suffices to induce the emergence of classical properties such as loss of coherence. Double photoionization of H2. Left: Circularly polarized light comes from the top....

18

Localization and loss of coherence in molecular double-slit experiments  

E-Print Network [OSTI]

, USA (D.R.); Physikalische und Theoretische Chemie, Institut f¨ur Chemie, Freie Universit¨at Berlin

Loss, Daniel

19

Polarization-preserving confocal microscope for optical experiments in a dilution refrigerator with high magnetic field  

E-Print Network [OSTI]

We present the design and operation of a fiber-based cryogenic confocal microscope. It is designed as a compact cold-finger that fits inside the bore of a superconducting magnet, and which is a modular unit that can be easily swapped between use in a dilution refrigerator and other cryostats. We aimed at application in quantum optical experiments with electron spins in semiconductors and the design has been optimized for driving with, and detection of optical fields with well-defined polarizations. This was implemented with optical access via a polarization maintaining fiber together with Voigt geometry at the cold finger, which circumvents Faraday rotations in the optical components in high magnetic fields. Our unit is versatile for use in experiments that measure photoluminescence, reflection, or transmission, as we demonstrate with a quantum optical experiment with an ensemble of donor-bound electrons in a thin GaAs film.

Maksym Sladkov; M. P. Bakker; A. U. Chaubal; D. Reuter; A. D. Wieck; C. H. van der Wal

2010-10-09T23:59:59.000Z

20

Polarization-preserving confocal microscope for optical experiments in a dilution refrigerator with high magnetic field  

E-Print Network [OSTI]

We present the design and operation of a fiber-based cryogenic confocal microscope. It is designed as a compact cold-finger that fits inside the bore of a superconducting magnet, and which is a modular unit that can be easily swapped between use in a dilution refrigerator and other cryostats. We aimed at application in quantum optical experiments with electron spins in semiconductors and the design has been optimized for driving with, and detection of optical fields with well-defined polarizations. This was implemented with optical access via a polarization maintaining fiber together with Voigt geometry at the cold finger, which circumvents Faraday rotations in the optical components in high magnetic fields. Our unit is versatile for use in experiments that measure photoluminescence, reflection, or transmission, as we demonstrate with a quantum optical experiment with an ensemble of donor-bound electrons in a thin GaAs film.

Sladkov, Maksym; Chaubal, A U; Reuter, D; Wieck, A D; van der Wal, C H

2010-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "microscopic double-slit experiment" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


21

Polarization-preserving confocal microscope for optical experiments in a dilution refrigerator with high magnetic field  

Science Journals Connector (OSTI)

We present the design and operation of a fiber-based cryogenic confocal microscope. It is designed as a compact cold-finger that fits inside the bore of a superconducting magnet and which is a modular unit that can be easily swapped between use in a dilution refrigerator and other cryostats. We aimed at application in quantum optical experiments with electron spins in semiconductors and the design has been optimized for driving with and detection of optical fields with well-defined polarizations. This was implemented with optical access via a polarization maintaining fiber together with Voigt geometry at the cold finger which circumvents Faraday rotations in the optical components in high magnetic fields. Our unit is versatile for use in experiments that measure photoluminescence reflection or transmission as we demonstrate with a quantum optical experiment with an ensemble of donor-bound electrons in a thin GaAs film.

Maksym Sladkov; M. P. Bakker; A. U. Chaubal; D. Reuter; A. D. Wieck; C. H. van der Wal

2011-01-01T23:59:59.000Z

22

Measuring Boltzmann’s constant with a low-cost atomic force microscope: An undergraduate experiment  

Science Journals Connector (OSTI)

We discuss a low-cost atomic force microscope that we have designed and built for use in an undergraduate teaching laboratory. This microscope gives students hands-on access to nano-Newton force measurements and subangstrom position measurements. The apparatus relies mainly on off-the-shelf components and utilizes an interferometric position sensor known as the interdigitated (ID) cantilever to obtain high resolution. The mechanical properties of the ID readout enable a robust and open design that makes it possible for students to directly control it. Its pedagogical advantage is that students interact with a complete instrument system and learn measurement principles in context. One undergraduate experiment enabled by this apparatus is a measurement of Boltzmann’s constant which is done by recording the thermal noise power spectrum of a microfabricated cantilever beam. In addition to gaining an appreciation of the lower limits of position and force measurements students learn to apply numerous concepts such as digital sampling Fourier-domain analysis noise sources and error propagation.

M. Shusteff; T. P. Burg; S. R. Manalis

2006-01-01T23:59:59.000Z

23

Scientists combine X-rays and microscopes for precise experiments | Argonne  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

This insulator-coated "smart tip" for synchrotron X-ray scanning tunneling microscopy confines the signal detection to a tiny region of a sample. The nanofabricated tips have been developed by an Argonne team led by Argonne nanoscientist Volker Rose to improve the sensitivity of the SXSTM technique. To view a larger version of the image, click on it. This insulator-coated "smart tip" for synchrotron X-ray scanning tunneling microscopy confines the signal detection to a tiny region of a sample. The nanofabricated tips have been developed by an Argonne team led by Argonne nanoscientist Volker Rose to improve the sensitivity of the SXSTM technique. To view a larger version of the image, click on it. This insulator-coated "smart tip" for synchrotron X-ray scanning tunneling microscopy confines the signal detection to a tiny region of a sample. The nanofabricated tips have been developed by an Argonne team led by Argonne nanoscientist Volker Rose to improve the sensitivity of the SXSTM technique. To view a larger version of the image, click on it. Scientists combine X-rays and microscopes for precise experiments

24

Speculative Physics: the Ontology of Theory and Experiment in High Energy Particle Physics and Science Fiction  

E-Print Network [OSTI]

The dissertation brings together approaches across the fields of physics, critical theory, literary studies, philosophy of physics, sociology of science, and history of science to synthesize a hybrid approach for instigating more rigorous and intense cross-disciplinary interrogations between the sciences and the humanities. There are two levels of conversations going on in the dissertation; at the first level, the discussion is centered on a critical historiography and philosophical implications of the discovery Higgs boson in relation to its position at the intersection of old (current) and the potential for new possibilities in quantum physics; I then position my findings on the Higgs boson in connection to the double-slit experiment that represents foundational inquiries into quantum physics, to demonstrate the bridge between fundamental physics and high energy particle physics. The conceptualization of the variants of the double-slit experiment informs the aforementioned critical comparisons. At the secon...

Lee, Clarissa Ai Ling

2014-01-01T23:59:59.000Z

25

Young-Type Experiment Using a Single-Electron Source and an Independent Atomic-Size Two-Center Interferometer  

Science Journals Connector (OSTI)

Evidence is given for Young-type interferences caused by a single electron acting on a given double-center scatterer analogous to an atomic-size double-slit system. The electron is provided by autoionization of a doubly excited He atom following the capture of the electrons of H2 by a He2+ incoming ion. The autoionizing projectile is a single-electron source, independent of the interferometer provided by the two H+ centers of the fully ionized H2 molecule. This experiment resembles the famous thought experiment imagined by Feynman in 1963, in which the quantum nature of the electron is illustrated from a Young-like double-slit experiment. Well-defined oscillations are visible in the angular distribution of the scattered electrons, showing that each electron interferes with itself.

J.-Y. Chesnel; A. Hajaji; R. O. Barrachina; F. Frémont

2007-03-08T23:59:59.000Z

26

Neutron Microscope  

Science Journals Connector (OSTI)

We report successful operation of a neutron microscope using ultracold neutrons at the high-flux reactor at Grenoble. A sharp, achromatic image of an object slit was obtained at a magnification of 50. The measured resolution of 0.1 mm was limited mainly by the available beam intensity, not by aberrations.

P. Herrmann; K. -A. Steinhauser; R. Gähler; A. Steyerl; W. Mampe

1985-05-06T23:59:59.000Z

27

REVIEW OF SCIENTIFIC INSTRUMENTS 82, 043105 (2011) Polarization-preserving confocal microscope for optical experiments in a  

E-Print Network [OSTI]

is a modular unit that can be easily swapped between use in a dilution refrigerator and other cryostats. We for optical experiments in a dilution refrigerator with high magnetic field Maksym Sladkov,1 M. P. Bakker,1 A refrigerator that is suited for this research. This instrument also has relevance for related quantum optical

van der Wal, Caspar H.

28

Speculative Physics: the Ontology of Theory and Experiment in High Energy Particle Physics and Science Fiction  

E-Print Network [OSTI]

The dissertation brings together approaches across the fields of physics, critical theory, literary studies, philosophy of physics, sociology of science, and history of science to synthesize a hybrid approach for instigating more rigorous and intense cross-disciplinary interrogations between the sciences and the humanities. There are two levels of conversations going on in the dissertation; at the first level, the discussion is centered on a critical historiography and philosophical implications of the discovery Higgs boson in relation to its position at the intersection of old (current) and the potential for new possibilities in quantum physics; I then position my findings on the Higgs boson in connection to the double-slit experiment that represents foundational inquiries into quantum physics, to demonstrate the bridge between fundamental physics and high energy particle physics. The conceptualization of the variants of the double-slit experiment informs the aforementioned critical comparisons. At the second level of the conversation, theories are produced from a close study of the physics objects as speculative engine for new knowledge generation that are then reconceptualized and re-articulated for extrapolation into the speculative ontology of hard science fiction, particularly the hard science fiction written with the double intent of speaking to the science while producing imaginative and socially conscious science through the literary affordances of science fiction. The works of science fiction examined here demonstrate the tension between the internal values of physics in the practice of theory and experiment and questions on ethics, culture, and morality.

Clarissa Ai Ling Lee

2014-06-21T23:59:59.000Z

29

ALSNews Vol. 328  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

8 Print 8 Print A Microscopic Double-Slit Experiment In a new twist on Young's classic double-slit experiment, researchers have shown that the double slits can be replaced by electron-emitting diatomic molecules and that traces of electron-wave interference can be directly observed in measurements of the vibrationally resolved photoionization spectra. Read more... Contact: This e-mail address is being protected from spambots. You need JavaScript enabled to view it Signal Recognition Particle-Receptor Complex Structure Solved The signal recognition particle (SRP) delivers proteins to the cell membrane in prokaryotes and in eukaryotes to the endoplasmic reticulum. Researchers learned more about this essential and evolutionarily conserved process, called co-translational protein targeting, via the crystal structure of the complexed SRP molecule. Read more...

30

ALSNews Vol. 328  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

ALSNews Vol. 328 Print ALSNews Vol. 328 Print A Microscopic Double-Slit Experiment In a new twist on Young's classic double-slit experiment, researchers have shown that the double slits can be replaced by electron-emitting diatomic molecules and that traces of electron-wave interference can be directly observed in measurements of the vibrationally resolved photoionization spectra. Read more... Contact: This e-mail address is being protected from spambots. You need JavaScript enabled to view it Signal Recognition Particle-Receptor Complex Structure Solved The signal recognition particle (SRP) delivers proteins to the cell membrane in prokaryotes and in eukaryotes to the endoplasmic reticulum. Researchers learned more about this essential and evolutionarily conserved process, called co-translational protein targeting, via the crystal structure of the complexed SRP molecule. Read more...

31

ALSNews Vol. 328  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

ALSNews Vol. 328 Print ALSNews Vol. 328 Print A Microscopic Double-Slit Experiment In a new twist on Young's classic double-slit experiment, researchers have shown that the double slits can be replaced by electron-emitting diatomic molecules and that traces of electron-wave interference can be directly observed in measurements of the vibrationally resolved photoionization spectra. Read more... Contact: This e-mail address is being protected from spambots. You need JavaScript enabled to view it Signal Recognition Particle-Receptor Complex Structure Solved The signal recognition particle (SRP) delivers proteins to the cell membrane in prokaryotes and in eukaryotes to the endoplasmic reticulum. Researchers learned more about this essential and evolutionarily conserved process, called co-translational protein targeting, via the crystal structure of the complexed SRP molecule. Read more...

32

ALSNews Vol. 328  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

8 Print 8 Print A Microscopic Double-Slit Experiment In a new twist on Young's classic double-slit experiment, researchers have shown that the double slits can be replaced by electron-emitting diatomic molecules and that traces of electron-wave interference can be directly observed in measurements of the vibrationally resolved photoionization spectra. Read more... Contact: This e-mail address is being protected from spambots. You need JavaScript enabled to view it Signal Recognition Particle-Receptor Complex Structure Solved The signal recognition particle (SRP) delivers proteins to the cell membrane in prokaryotes and in eukaryotes to the endoplasmic reticulum. Researchers learned more about this essential and evolutionarily conserved process, called co-translational protein targeting, via the crystal structure of the complexed SRP molecule. Read more...

33

Advanced electron microscopic techniques applied to the characterization of irradiation effects and fission product identification of irradiated TRISO coated particles from the AGR-1 experiment  

SciTech Connect (OSTI)

Preliminary electron microscopy of coated fuel particles from the AGR-1 experiment was conducted using characterization techniques such as scanning electron microscopy (SEM), transmission electron microscopy (TEM), energy dispersive spectroscopy (EDS), and wavelength dispersive spectroscopy (WDS). Microscopic quantification of fission-product precipitates was performed. Although numerous micro- and nano-sized precipitates observed in the coating layers during initial SEM characterization of the cross-sections, and in subsequent TEM diffraction patterns, were indexed as UPd{sub 2}Si{sub 2}, no Ag was conclusively found. Additionally, characterization of these precipitates highlighted the difficulty of measuring low concentrations of Ag in precipitates in the presence of significantly higher concentrations of Pd and U. The electron microscopy team followed a multi-directional and phased approach in the identification of fission products in irradiated TRISO fuel. The advanced electron microscopy techniques discussed in this paper, not only demonstrate the usefulness of the equipment (methods) as relevant research tools, but also provide relevant scientific results which increase the knowledge about TRISO fuel particles microstructure and fission products transport.

Rooyen, I.J. van; Lillo, T.M.; Trowbridge, T.L.; Madden, J.M. [Idaho National Laboratory, Idaho Falls, ID 83415-6188 (United States); Wu, Y.Q. [Boise State University, Boise, ID 83725-2090 (United States); Center for Advanced Energy Studies, Idaho Falls, ID 83401 (United States); Goran, D. [Brucker Nano Gmbh, Berlin, 12489 (Germany)

2013-07-01T23:59:59.000Z

34

Transmission Electron Microscope and Scanning Electron Microscopes -  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Facilities > Transmission Electron Facilities > Transmission Electron Microscope and Scanning Electron Microscopes FACILITIES Transmission Electron Microscope and Scanning Electron Microscopes Overview Other Facilities Work with Argonne Contact us For Employees Site Map Help Join us on Facebook Follow us on Twitter NE on Flickr Transmission Electron Microscope and Scanning Electron Microscopes The research activities of the Corrosion and Mechanics of Materials Section are supported by complete metallography/sample preparation rooms equipped with several optical and electron microscopes: a Transmission Electron Microscope and two Scanning Electron Microscopes. Bookmark and Share Transmission electron microscope (TEM) Detail of JEOL 100CXII TEM Figure 1: Detail of JEOL 100CXII TEM. Click on image to view larger image.

35

FTIR Microscope | EMSL  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

FTIR Microscope FTIR Microscope Two Bruker Fourier Transform Infrared (FTIR) spectrometers (IFS66 and IFS66V) with visible, near-, mid- and far-infrared (IR) capabilities are...

36

Searches for signals from microscopic black holes in processes of proton collisions at {radical} s = 7 TeV in the CMS experiment at the LHC  

SciTech Connect (OSTI)

If the fundamental scale of multidimensional gravity is about one or several TeV units, microscopic black holes or objects referred to as string balls may be produced at the LHC. The most recent results obtained by the CMS Collaboration at the LHC from searches for such signals at the c.m. protoninteraction energy of 7 TeV and for an integrated luminosity of 4.7 fb{sup -1}. Lower limits on the masses of objects of strongly acting gravity were set in the parameter region accessible to tests at the present time. Prospects for further research in this field are discussed.

Savina, M. V., E-mail: savina@cern.ch [Joint Institute for Nuclear Research (Russian Federation)

2013-09-15T23:59:59.000Z

37

Reading Comprehension - Microscopes  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Microscopes Microscopes It happened over 300 years _________ since ago before after in Holland. Anton van Leeuwenhoek (AN-tun van LAY-vun-hook) had a new microscope that he had _________ made lost previewed delivered . One day he _________ fell broke looked went through it at a drop of lake water. What he saw surprised him. The water was alive with what Leeuwenhoek called "wee beasties." The microscope made tiny organisms look 200 times _________ farther smaller darker larger than life size. Leeuwenhoek was one of the first scientists to see living things that were that _________ life small darker larger . His work was a giant _________ turtle gorilla step tower for science. Today, microscopes are much stronger. An electron microscope can make tiny organisms look 200,000 times _________ small over under life size. A few

38

Helium Ion Microscope | EMSL  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

other characterization capabilities. User Portal Name: Helium Ion Microscope Instrument ID: 34104 Availability: 10 hours a day, 5 days a week Facility: Quiet Wing Quick Specs...

39

Disorder-Induced Microscopic Magnetic Memory  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Disorder-Induced Microscopic Disorder-Induced Microscopic Magnetic Memory Disorder-Induced Microscopic Magnetic Memory Print Wednesday, 26 October 2005 00:00 The magnetic-recording industry deliberately introduces carefully controlled disorder into its materials to obtain the desired magnetic properties. But as the density of magnetic disks climbs, the size of the magnetic domains responsible for storage must decrease, posing new challenges. Beautiful theories based on random microscopic disorder have been developed over the past ten years. To directly compare these theories with precise experiments, an American-European team, led by researchers from the University of Washington, Seattle, first developed and then applied coherent x-ray speckle metrology to microscopic magnetic domains in a series of thin multilayer perpendicular magnetic materials of varying disorder. Their results, at odds with all previous theories, have set a new reference point for future theories.

40

Astronomy by microscope  

Science Journals Connector (OSTI)

......August 2009 research-article Features Astronomy by microscope Monica M Grady reviews the astronomy revealed in samples of solar system material...of the Natural History Museum, London. Astronomy is the study of stars (and galaxies......

Monica M Grady

2009-08-01T23:59:59.000Z

Note: This page contains sample records for the topic "microscopic double-slit experiment" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


41

Microscope collision protection apparatus  

DOE Patents [OSTI]

A microscope collision protection apparatus for a remote control microscope which protects the optical and associated components from damage in the event of an uncontrolled collision with a specimen, regardless of the specimen size or shape. In a preferred embodiment, the apparatus includes a counterbalanced slide for mounting the microscope's optical components. This slide replaces the rigid mounts on conventional upright microscopes with a precision ball bearing slide. As the specimen contacts an optical component, the contacting force will move the slide and the optical components mounted thereon. This movement will protect the optical and associated components from damage as the movement causes a limit switch to be actuated, thereby stopping all motors responsible for the collision.

DeNure, Charles R. (Pocatello, ID)

2001-10-23T23:59:59.000Z

42

Electron Microscope Facility  

ScienceCinema (OSTI)

Brookhaven Lab is home to one of only a few Scanning Transmision Electron Microscope (STEM) machines in the world and one of the few that can image single heavy atoms.

None

2010-01-08T23:59:59.000Z

43

Infrared microscope inspection apparatus  

DOE Patents [OSTI]

Apparatus and system for inspecting infrared transparents, such as an array of photovoltaic modules containing silicon solar cells, includes an infrared microscope, at least three sources of infrared light placed around and having their axes intersect the center of the object field and means for sending the reflected light through the microscope. The apparatus is adapted to be mounted on an X-Y translator positioned adjacent the object surface. 4 figs.

Forman, S.E.; Caunt, J.W.

1985-02-26T23:59:59.000Z

44

Infrared microscope inspection apparatus  

DOE Patents [OSTI]

Apparatus and system for inspecting infrared transparents, such as an array of photovoltaic modules containing silicon solar cells, includes an infrared microscope, at least three sources of infrared light placed around and having their axes intersect the center of the object field and means for sending the reflected light through the microscope. The apparatus is adapted to be mounted on an X-Y translator positioned adjacent the object surface.

Forman, Steven E. (Framingham, MA); Caunt, James W. (Concord, MA)

1985-02-26T23:59:59.000Z

45

Disorder-Induced Microscopic Magnetic Memory  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Disorder-Induced Microscopic Magnetic Memory Print Disorder-Induced Microscopic Magnetic Memory Print The magnetic-recording industry deliberately introduces carefully controlled disorder into its materials to obtain the desired magnetic properties. But as the density of magnetic disks climbs, the size of the magnetic domains responsible for storage must decrease, posing new challenges. Beautiful theories based on random microscopic disorder have been developed over the past ten years. To directly compare these theories with precise experiments, an American-European team, led by researchers from the University of Washington, Seattle, first developed and then applied coherent x-ray speckle metrology to microscopic magnetic domains in a series of thin multilayer perpendicular magnetic materials of varying disorder. Their results, at odds with all previous theories, have set a new reference point for future theories.

46

Disorder-Induced Microscopic Magnetic Memory  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Disorder-Induced Microscopic Magnetic Memory Print Disorder-Induced Microscopic Magnetic Memory Print The magnetic-recording industry deliberately introduces carefully controlled disorder into its materials to obtain the desired magnetic properties. But as the density of magnetic disks climbs, the size of the magnetic domains responsible for storage must decrease, posing new challenges. Beautiful theories based on random microscopic disorder have been developed over the past ten years. To directly compare these theories with precise experiments, an American-European team, led by researchers from the University of Washington, Seattle, first developed and then applied coherent x-ray speckle metrology to microscopic magnetic domains in a series of thin multilayer perpendicular magnetic materials of varying disorder. Their results, at odds with all previous theories, have set a new reference point for future theories.

47

Soft x-ray laser microscope  

SciTech Connect (OSTI)

The program consisted of two phases (Phase I and Phase II). The goal of the Phase I (first year program) was to design and construct the Soft X-ray Laser Contact Microscope. Such microscope was constructed and adapted to PPL's 18.2nm soft X-ray Laser (SXL), which in turn was modified and prepared for microscopy experiments. Investigation of the photoresist response to 18.2nm laser radiation and transmissivity of 0.1m thick silicion-nitride (Si[sub 3]N[sub 4]) windows were important initial works. The goal of the first year of Phase II was to construct X-ray contact microscope in combination with existing optical phase microscope, already used by biologists. In the second year of Phase II study of dehydrated Horeseshoe Crab and Hela cancer cells were performed with COXRALM. Also during Phase II, the Imaging X-Ray Laser Microscope (IXRALM) was designed and constructed. This paper describes the development of each of the microscopes and their application for research.

Suckewer, P.I.

1990-10-01T23:59:59.000Z

48

The Reflecting Microscope  

Science Journals Connector (OSTI)

...INVESTIGATION OF CATADIOPTRIC SCHWARZSCHILD SYSTEMS, JOURNAL OF THE OPTICAL...PHYSIOLOGY 32 : 489 ( 1949 ). SCHWARZSCHILD, K, GESELLSCHAFT WISS MP...USE OF REFLECTING SYSTEMS of mirror-pairs in microscope objectives...0.65 with an aspheric mirror-pair of Schwarzsehild...

Robert C. Mellors

1950-10-06T23:59:59.000Z

49

Ion photon emission microscope  

DOE Patents [OSTI]

An ion beam analysis system that creates microscopic multidimensional image maps of the effects of high energy ions from an unfocussed source upon a sample by correlating the exact entry point of an ion into a sample by projection imaging of the ion-induced photons emitted at that point with a signal from a detector that measures the interaction of that ion within the sample. The emitted photons are collected in the lens system of a conventional optical microscope, and projected on the image plane of a high resolution single photon position sensitive detector. Position signals from this photon detector are then correlated in time with electrical effects, including the malfunction of digital circuits, detected within the sample that were caused by the individual ion that created these photons initially.

Doyle, Barney L. (Albuquerque, NM)

2003-04-22T23:59:59.000Z

50

Fluorescence, Single-Molecule Microscope | EMSL  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Single-Molecule Microscope Fluorescence, Single-Molecule Microscope The single-molecule optical microscope is designed to study complex reaction dynamics such as enzymatic...

51

Solid state optical microscope  

DOE Patents [OSTI]

A solid state optical microscope wherein wide-field and high-resolution images of an object are produced at a rapid rate by utilizing conventional optics with a charge-coupled photodiode array. A galvanometer scanning mirror, for scanning in one of two orthogonal directions is provided, while the charge-coupled photodiode array scans in the other orthogonal direction. Illumination light from the object is incident upon the photodiodes, creating packets of electrons (signals) which are representative of the illuminated object. The signals are then processed, stored in a memory, and finally displayed as a video signal. 2 figs.

Young, I.T.

1983-08-09T23:59:59.000Z

52

Solid state optical microscope  

DOE Patents [OSTI]

A solid state optical microscope wherein wide-field and high-resolution images of an object are produced at a rapid rate by utilizing conventional optics with a charge-coupled photodiode array. A galvanometer scanning mirror, for scanning in one of two orthogonal directions is provided, while the charge-coupled photodiode array scans in the other orthogonal direction. Illumination light from the object is incident upon the photodiodes, creating packets of electrons (signals) which are representative of the illuminated object. The signals are then processed, stored in a memory, and finally displayed as a video signal.

Young, Ian T. (Pleasanton, CA)

1983-01-01T23:59:59.000Z

53

Atomic Force Microscope  

SciTech Connect (OSTI)

The Atomic Force Microscope (AFM) is a recently developed instrument that has achieved atomic resolution imaging of both conducting and non- conducting surfaces. Because the AFM is in the early stages of development, and because of the difficulty of building the instrument, it is currently in use in fewer than ten laboratories worldwide. It promises to be a valuable tool for obtaining information about engineering surfaces and aiding the .study of precision fabrication processes. This paper gives an overview of AFM technology and presents plans to build an instrument designed to look at engineering surfaces.

Day, R.D.; Russell, P.E.

1988-12-01T23:59:59.000Z

54

Experiences  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Experiences Experiences with 100Gbps Network Applications Mehmet Balman, Eric Pouyoul, Yushu Yao, E. Wes Bethel Burlen Loring, Prabhat, John Shalf, Alex Sim, and Brian L. Tierney Lawrence Berkeley National Laboratory One Cyclotron Road Berkeley, CA, 94720, USA {mbalman,epouyoul,yyao,ewbethel,bloring,prabhat,jshalf,asim,btierney}@lbl.gov ABSTRACT 100Gbps networking has finally arrived, and many research and educational institutions have begun to deploy 100Gbps routers and services. ESnet and Internet2 worked together to make 100Gbps networks available to researchers at the Supercomputing 2011 con- ference in Seattle Washington. In this paper, we describe two of the first applications to take advantage of this network. We demon- strate a visualization application that enables remotely located sci- entists to gain insights from large datasets. We also demonstrate climate

55

Epi-Fluorescence Inverted Microscope (Zeiss,  

E-Print Network [OSTI]

Epi-Fluorescence Inverted Microscope (Zeiss, Observer Z1) April 2013 #12;Start Up cont. · Turn) #12;Using the Microscope cont. · On an inverted microscope samples on a glass slide are usually viewed

Subramanian, Venkat

56

Coherence-controlled holographic microscope  

Science Journals Connector (OSTI)

Transmitted-light coherence-controlled holographic microscope (CCHM) based on an off-axis achromatic interferometer allows us to use light sources of arbitrary degree of temporal and...

Kolman, Pavel; Chmelík, Radim

2010-01-01T23:59:59.000Z

57

Reading Comprehension - Dissecting and Compound Microscopes  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Dissecting and Compound Microscopes Two types of microscopes. _________ Dissecting and Compound Microscopes Two types of microscopes. _________ Dissecting Microscope Compound Microscope _________ eyepiece focus knob light light switch objective stage _________ eyepiece focus knob light light switch objective stage _________ eyepiece focus knob light light switch objective stage _________ eyepiece focus knob light light switch objective stage _________ eyepiece focus knob light light switch objective stage _________ eyepiece focus knob light light switch objective stage _________ Dissecting Microscope Compound Microscope _________ eyepieces focus knob light light switch objective stage _________ eyepieces focus knob light light switch objective stage _________ eyepieces focus knob light light switch objective stage _________ eyepieces focus knob light

58

Science, Optics and You: Microscopes and Crystals  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

glass), and the field microscope. (The hand lens and field microscope are in your Science, Optics and You package.) Activity 14 provides instructions for making different...

59

Installation of the MAXIMUM microscope at the ALS  

SciTech Connect (OSTI)

The MAXIMUM scanning x-ray microscope, developed at the Synchrotron Radiation Center (SRC) at the University of Wisconsin, Madison was implemented on the Advanced Light Source in August of 1995. The microscope`s initial operation at SRC successfully demonstrated the use of multilayer coated Schwarzschild objective for focusing 130 eV x-rays to a spot size of better than 0.1 micron with an electron energy resolution of 250meV. The performance of the microscope was severely limited, because of the relatively low brightness of SRC, which limits the available flux at the focus of the microscope. The high brightness of the ALS is expected to increase the usable flux at the sample by a factor of 1,000. The authors will report on the installation of the microscope on bending magnet beamline 6.3.2 at the ALS and the initial measurement of optical performance on the new source, and preliminary experiments with surface chemistry of HF etched Si will be described.

Ng, W.; Perera, R.C.C.; Underwood, J.H. [Lawrence Berkeley Lab., CA (United States); Singh, S.; Solak, H.; Cerrina, F. [Univ. of Wisconsin, Stoughton, WI (United States). Center for X-ray Lithography

1995-10-01T23:59:59.000Z

60

Soft x-ray laser microscope. Final report  

SciTech Connect (OSTI)

The program consisted of two phases (Phase I and Phase II). The goal of the Phase I (first year program) was to design and construct the Soft X-ray Laser Contact Microscope. Such microscope was constructed and adapted to PPL`s 18.2nm soft X-ray Laser (SXL), which in turn was modified and prepared for microscopy experiments. Investigation of the photoresist response to 18.2nm laser radiation and transmissivity of 0.1m thick silicion-nitride (Si{sub 3}N{sub 4}) windows were important initial works. The goal of the first year of Phase II was to construct X-ray contact microscope in combination with existing optical phase microscope, already used by biologists. In the second year of Phase II study of dehydrated Horeseshoe Crab and Hela cancer cells were performed with COXRALM. Also during Phase II, the Imaging X-Ray Laser Microscope (IXRALM) was designed and constructed. This paper describes the development of each of the microscopes and their application for research.

Suckewer, P.I.

1990-10-01T23:59:59.000Z

Note: This page contains sample records for the topic "microscopic double-slit experiment" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


61

The History of the Microscope  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

the Microscope the Microscope Nature Bulletin No. 506 November 9, 1957 Forest Preserve District of Cook County Daniel Ryan, President Roberts Mann, Conservation Editor David H. Thompson, Senior Naturalist THE HISTORY OF THE MICROSCOPE During that historic period known as the Renaissance, after the "dark" Middle Ages, there occurred the inventions of printing, gunpowder and the mariner's compass, followed by the discovery of America. Equally remarkable was the invention of the microscope: an instrument that enables the human eye, by means of a lens or combinations of lenses, to observe enlarged images of tiny objects. It made visible the fascinating details of worlds within worlds. Long before, in the hazy unrecorded past, someone picked up a piece of transparent crystal thicker in the middle than at the edges, looked through it, and discovered that it made things look larger. Someone also found that such a crystal would focus the sun's rays and set fire to a piece of parchment or cloth. Magnifiers and "burning glasses" are mentioned in the writings of Seneca and Pliny the Elder, Roman philosophers during the first century A. D., but apparently they were not used much until the invention of spectacles, toward the end of the 13th century. They were named lenses because they are shaped like the seeds of a lentil.

62

Fermilab | Science | Inquiring Minds | Questions About Physics  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Double Slit I am interested to know if there has been an experiment involving proton beams to compare to electron beam and twin slit experiments. I would also like to know if the...

63

Solid-state optical microscope  

DOE Patents [OSTI]

A solid state optical microscope is described wherein wide-field and high-resolution images of an object are produced at a rapid rate by utilizing conventional optics with a charge-coupled photodiode array. Means for scanning in one of two orthogonal directions are provided, while the charge-coupled photodiode array scans in the other orthogonal direction. Illumination light from the object is incident upon the photodiodes, creating packets of electrons (signals) which are representative of the illuminated object. The signals are then processed, stored in a memory, and finally displayed as a video signal.

Young, I.T.

1981-01-07T23:59:59.000Z

64

Sensing mode atomic force microscope  

DOE Patents [OSTI]

An atomic force microscope utilizes a pulse release system and improved method of operation to minimize contact forces between a probe tip affixed to a flexible cantilever and a specimen being measured. The pulse release system includes a magnetic particle affixed proximate the probe tip and an electromagnetic coil. When energized, the electromagnetic coil generates a magnetic field which applies a driving force on the magnetic particle sufficient to overcome adhesive forces exhibited between the probe tip and specimen. The atomic force microscope includes two independently displaceable piezo elements operable along a Z-axis. A controller drives the first Z-axis piezo element to provide a controlled approach between the probe tip and specimen up to a point of contact between the probe tip and specimen. The controller then drives the first Z-axis piezo element to withdraw the cantilever from the specimen. The controller also activates the pulse release system which drives the probe tip away from the specimen during withdrawal. Following withdrawal, the controller adjusts the height of the second Z-axis piezo element to maintain a substantially constant approach distance between successive samples.

Hough, Paul V. C. (Port Jefferson, NY); Wang, Chengpu (Upton, NY)

2003-01-01T23:59:59.000Z

65

Experiments performed in order to reveal fundamental differences between the diffraction and interference of waves and electrons  

E-Print Network [OSTI]

Diffraction patterns of electrons are believed to resemble those of electromagnetic waves (EMW). I performed a series of experiments invoked to show that the periodicity of peaks in the diffraction diagram of electrons is concerned with the periodicity of the arrangement of scattering centers in the diffraction grating in combination with the supposed character of the spatial structure of the electron as a system of regularly spaced concentric shells of elasticity. I started from the experiment on the diffraction of electrons and EMWs at the sharp edge of the opaque half-plane. This simple scattering configuration enabled me to discriminate between the re-radiation mechanism of the wave diffraction and ricochet scattering of electrons on the edge of the half-plane. Then I made experiments with scattering on composite objects proceeding step by step from a single straight edge to a couple of edges (one slit) and then to four edges (two slits). Thus I succeeded in interpretation of the double-slit diffraction (four straight edges) in terms of the scattering on a single edge. I managed also to observe the electron's trajectory. Equipping the slit's edge with a semiconductor sensors I registered the passing of the electron through the slit detecting simultaneously a weaker signal at another slit. This technique appeared not to destroy or disturb the "interference" pattern. Closing one slit by inserting therein a transparent for EMWs piece of dielectric I have found that the scattering pattern beneath this slit vanishes while the scattering pattern under the open slit remains as before when both slits were open. This experiment indicates that the electron "interferes" with its electromagnetic component passed via the slit plugged by the transparent for it dielectric.

Victor V. Demjanov

2010-02-20T23:59:59.000Z

66

Scanning evanescent electro-magnetic microscope  

DOE Patents [OSTI]

A novel scanning microscope is described that uses near-field evanescent electromagnetic waves to probe sample properties. The novel microscope is capable of high resolution imaging and quantitative measurements of the electrical properties of the sample. The inventive scanning evanescent wave electromagnetic microscope (SEMM) can map dielectric constant, tangent loss, conductivity, complex electrical impedance, and other electrical parameters of materials. The quantitative map corresponds to the imaged detail. The novel microscope can be used to measure electrical properties of both dielectric and electrically conducting materials.

Xiang, Xiao-Dong (Alameda, CA); Gao, Chen (Alameda, CA)

2001-01-01T23:59:59.000Z

67

Optimization of a coherent soft x-ray beamline for coherent scattering experiments at NSLS-II  

SciTech Connect (OSTI)

The coherent soft x-ray and full polarization control (CSX) beamline at the National Synchrotron Light Source - II (NSLS-II) will deliver 1013 coherent photons per second in the energy range of 0.2-2 keV with a resolving power of 2000. The source, a dual elliptically polarizing undulator (EPU), and beamline optics should be optimized to deliver the highest possible coherent flux in a 10-30 {micro}m spot for use in coherent scattering experiments. Using the computer code Synchrotron Radiation Workshop (SRW), we simulate the photon source and focusing optics in order to investigate the conditions which provide the highest usable coherent intensity on the sample. In particular, we find that an intermediate phasing magnet is needed to correct for the relative phase between the two EPUs and that the optimum phase setting produces a spectrum in which the desired wavelength is slightly red-shifted thus requiring a larger aperture than originally anticipated. This setting is distinct from that which produces an on-axis spectrum similar to a single long undulator. Furthermore, partial coherence calculations, utilizing a multiple electron approach, indicate that a high degree of spatial coherence is still obtained at the sample location when such an aperture is used. The aperture size which maximizes the signal-to-noise ratio of a double-slit experiment is explored. This combination of high coherence and intensity is ideally suited for x-ray ptychography experiments which reconstruct the scattering density from micro-diffraction patterns. This technique is briefly reviewed and the effects on the image quality of proximity to the beamline focus are explored.

Shapiro D.; Chubar, O.; Kaznatcheev, K.; Reininger, R.; Sanchez-Hanke, C.; Wang, S.

2011-08-21T23:59:59.000Z

68

Robotic CCD microscope for enhanced crystal recognition  

DOE Patents [OSTI]

A robotic CCD microscope and procedures to automate crystal recognition. The robotic CCD microscope and procedures enables more accurate crystal recognition, leading to fewer false negative and fewer false positives, and enable detection of smaller crystals compared to other methods available today.

Segelke, Brent W. (San Ramon, CA); Toppani, Dominique (Livermore, CA)

2007-11-06T23:59:59.000Z

69

Variable Temperature Scanning Probe Microscope | EMSL  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

EMSL's ultra-high vacuum, variable-temperature scanning probe microscope system, or UHV VT SPM, is a state-of-the-art surface science tool comprising multiple complementary...

70

Optical analysis of an ultra-high resolution two-mirror soft x-ray microscope  

Science Journals Connector (OSTI)

Promoted by the successful application of multilayer coated optics in soft x-ray imaging experiments in solar physics and projection lithography, several groups have designed, analyzed, fabricated, and are testing Schwarzschild multilayer soft x-ray microscopes. Simulations have indicated that diffraction limited performance of a spherical Schwarzschild microscope operating near 100 Å will be limited to systems with a small numerical aperture of approximately 0.15 and a corresponding resolution, based on the Rayleigh criterion, of 3.3 times the wavelength of the incident radiation. In principle, a two aspherical mirror Head microscope, which satisfies the constant optical path length condition and the Abbé sine condition, should achieve diffraction limited performance for very large numerical apertures. For a practical soft x-ray microscope, surface contour errors, microroughness, reflectance of multilayer coatings, and variation of the angle of incidence over the multilayer substrates become significant factors in degrading system resolution and must be controlled before an ultra-high resolution, two-mirror microscope will be realized. For a 30x reflecting microscope with a numerical aperture ranging from 0.15 to 0.35, the effects on resolution of surface contour errors, tilts, and misalignments of the optics have been studied. Graded spacing of the multilayer coatings on the mirror substrates are required of a fast, two-mirror microscope.

David L. Shealy; Cheng Wang; Richard B. Hoover

1995-01-01T23:59:59.000Z

71

X-ray laser microscope apparatus  

DOE Patents [OSTI]

A microscope consisting of an x-ray contact microscope and an optical microscope. The optical, phase contrast, microscope is used to align a target with respect to a source of soft x-rays. The source of soft x-rays preferably comprises an x-ray laser but could comprise a synchrotron or other pulse source of x-rays. Transparent resist material is used to support the target. The optical microscope is located on the opposite side of the transparent resist material from the target and is employed to align the target with respect to the anticipated soft x-ray laser beam. After alignment with the use of the optical microscope, the target is exposed to the soft x-ray laser beam. The x-ray sensitive transparent resist material whose chemical bonds are altered by the x-ray beam passing through the target mater GOVERNMENT LICENSE RIGHTS This invention was made with government support under Contract No. De-FG02-86ER13609 awarded by the Department of Energy. The Government has certain rights in this invention.

Suckewer, Szymon (Princeton, NJ); DiCicco, Darrell S. (Plainsboro, NJ); Hirschberg, Joseph G. (Coral Gables, FL); Meixler, Lewis D. (East Windsor, NJ); Sathre, Robert (Princeton, NJ); Skinner, Charles H. (Lawrenceville, NJ)

1990-01-01T23:59:59.000Z

72

Variable Temperature Ultra-High Vacuum Scanning Tunneling Microscope...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Vacuum Scanning Tunneling Microscope The Omicron variable temperature ultra-high vacuum (UHV) scanning tunneling microscope (VTSTM) is designed to study the structure of both clean...

73

Single-Molecule Flourescence/Patch Clamp Microscope | EMSL  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Single-Molecule FlourescencePatch Clamp Microscope Single-Molecule FlourescencePatch Clamp Microscope At EMSL, researchers use the single-molecule fluorescencepatch clamp...

74

Miniature self-contained vacuum compatible electronic imaging microscope  

DOE Patents [OSTI]

A vacuum compatible CCD-based microscopic camera with an integrated illuminator. The camera can provide video or still feed from the microscope contained within a vacuum chamber. Activation of an optional integral illuminator can provide light to illuminate the microscope subject. The microscope camera comprises a housing with a objective port, modified objective, beam-splitter, CCD camera, and LED illuminator.

Naulleau, Patrick P. (Oakland, CA); Batson, Phillip J. (Alameda, CA); Denham, Paul E. (Crockett, CA); Jones, Michael S. (San Francisco, CA)

2001-01-01T23:59:59.000Z

75

Instrument Series: Microscopy Environmental Transmission Electron Microscope  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Environmental Transmission Environmental Transmission Electron Microscope EMSL's environmental transmission electron microscope (ETEM) provides in situ capabilities that enable atomic-resolution imaging and spectroscopic studies of materials under dynamic operating conditions. In contrast to traditional operation of TEM under high vacuum, EMSL's ETEM uniquely allows imaging within high- temperature and gas environments-with a gas pressure up to 20 Torr. With a spherical aberration corrector for the objective lens, the ETEM captures atomic-level processes as they occur, enabling vital research across a range of scientific fields. Research Applications Chemical science and engineering - providing in situ observation of catalytic processes with atomic-level resolution Materials science and engineering - allowing

76

Spin microscope based on optically detected magnetic resonance  

DOE Patents [OSTI]

The invention relates to scanning magnetic microscope which has a photoluminescent nanoprobe implanted in the tip apex of an atomic force microscope (AFM), a scanning tunneling microscope (STM) or a near-field scanning optical microscope (NSOM) and exhibits optically detected magnetic resonance (ODMR) in the vicinity of unpaired electron spins or nuclear magnetic moments in the sample material. The described spin microscope has demonstrated nanoscale lateral resolution and single spin sensitivity for the AFM and STM embodiments.

Berman, Gennady P. (Los Alamos, NM); Chernobrod, Boris M. (Los Alamos, NM)

2007-12-11T23:59:59.000Z

77

Spin microscope based on optically detected magnetic resonance  

DOE Patents [OSTI]

The invention relates to scanning magnetic microscope which has a photoluminescent nanoprobe implanted in the tip apex of an atomic force microscope (AFM), a scanning tunneling microscope (STM) or a near-field scanning optical microscope (NSOM) and exhibits optically detected magnetic resonance (ODMR) in the vicinity of unpaired electron spins or nuclear magnetic moments in the sample material. The described spin microscope has demonstrated nanoscale lateral resolution and single spin sensitivity for the AFM and STM embodiments.

Berman, Gennady P. (Los Alamos, NM); Chernobrod, Boris M. (Los Alamos, NM)

2010-06-29T23:59:59.000Z

78

Spin microscope based on optically detected magnetic resonance  

DOE Patents [OSTI]

The invention relates to scanning magnetic microscope which has a photoluminescent nanoprobe implanted in the tip apex of an atomic force microscope (AFM), a scanning tunneling microscope (STM) or a near-field scanning optical microscope (NSOM) and exhibits optically detected magnetic resonance (ODMR) in the vicinity of impaired electron spins or nuclear magnetic moments in the sample material. The described spin microscope has demonstrated nanoscale lateral resolution and single spin sensitivity for the AFM and STM embodiments.

Berman, Gennady P. (Los Alamos, NM); Chernobrod, Boris M. (Los Alamos, NM)

2009-11-10T23:59:59.000Z

79

Spin microscope based on optically detected magnetic resonance  

DOE Patents [OSTI]

The invention relates to scanning magnetic microscope which has a photoluminescent nanoprobe implanted in the tip apex of an atomic force microscope (AFM), a scanning tunneling microscope (STM) or a near-field scanning optical microscope (NSOM) and exhibits optically detected magnetic resonance (ODMR) in the vicinity of unpaired electron spins or nuclear magnetic moments in the sample material. The described spin microscope has demonstrated nanoscale lateral resolution and single spin sensitivity for the AFM and STM embodiments.

Berman, Gennady P. (Los Alamos, NM); Chernobrod, Boris M. (Los Alamos, NM)

2009-10-27T23:59:59.000Z

80

On simulating 3D fluorescent microscope images  

Science Journals Connector (OSTI)

In recent years many various biomedical image segmentation methods have appeared. Though typically presented to be successful the majority of them was not properly tested against ground truth images. The obvious way of testing the quality of new segmentation ... Keywords: convolution, fluorescent optical microscope, procedural texture, simulator, synthetic image

David Svoboda; Marek Kašík; Martin Maška; Jan Hubeny; Stanislav Stejskal; Michal Zimmermann

2007-08-01T23:59:59.000Z

Note: This page contains sample records for the topic "microscopic double-slit experiment" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


81

Le microscope des mathmaticiens Tribune du Net  

E-Print Network [OSTI]

cette "tribune" Interactif ! Deux parties : 1 les TIC du chercheur TIC = Technologies de l'Information et de la Communication #12;Contenu de cette "tribune" Interactif ! Deux parties : 1 les TIC du chercheur TIC = Technologies de l'Information et de la Communication 2 ordinateur : le microscope des

Theyssier, Guillaume

82

SLAC All Access: X-ray Microscope  

ScienceCinema (OSTI)

SLAC physicists Johanna Nelson and Yijin Liu give a brief overview of the X-ray microscope at the Stanford Synchrotron Radiation Lightsource (SSRL) that is helping improve rechargeable-battery technology by letting researchers peek into the inner workings of batteries as they operate.

Nelson, Johanna; Liu, Yijin

2014-06-13T23:59:59.000Z

83

On the Microscopic Origin of Cholesteric Pitch  

E-Print Network [OSTI]

We present a microscopic analysis of the instability of the nematic phase to chirality when molecular chirality is introduced perturbatively. We show that previously neglected short-range biaxial correlations play a crucial role in determining the cholesteric pitch. We propose an order parameter which quantifies the chirality of a molecule.

A. B. Harris; Randall D. Kamien; T. C. Lubensky

1996-07-11T23:59:59.000Z

84

A review of the NRL CARS microscope  

Science Journals Connector (OSTI)

This paper describes a technique that permits molecular specificity in microscopy while retaining good spatial resolution. Specificity is achieved using Raman scattering from characteristic molecular vibrations and high resolution is obtained by imaging the distribution of visible anti?Stokes radiation. Images have been obtained from a variety of pure organic liquids from deuterated water in onion?skin cells deuterated liposomes and other samples. Thermal and dielectric breakdown damage to even fragile biological materials is made negligible by choice of duty cycle and average power. Sample fluorescence is avoided by the choice of anti?Stokes imaging. Imaging through (usually astigmatic) spectrometers is not needed. Deuterium substitution can be used as a general purpose and artifact?free ‘‘stain’’. The combination of high spatial resolution excellent molecular discrimination and digital image processing (background subtraction) provide the CARS microscope with capabilities not found in any other current microscopic imaging technique.

M. D. Duncan; J. Reintjes; T. J. Manuccia

1987-01-01T23:59:59.000Z

85

A transmission electron microscope for lecture demonstrations  

Science Journals Connector (OSTI)

A simple transmission electron microscope (TEM) suitable for lecture demonstrations is described. In this TEM electrons are created in a glow discharge between two parallel electrodes in air at a reduced pressure. The electrons are collimated by a small hole in the anode focused by a solenoid that acts as an electromagnetic lens and imaged on a thin layer of phosphor deposited inside an Erlenmeyer flask. An image of a biological sample placed between the source and the lens can be magnified about 20 times. The microscope uses inexpensive components that can be quickly assembled during a demonstration. The TEM provides a visual and memorable display that highlights phenomena such as mean-free-path charged particle optics electrical discharges and cathodoluminescence.

J. A. Panitz; Gertrude Rempfer

2006-01-01T23:59:59.000Z

86

Dynamic study of tunable stiffness scanning microscope probe  

E-Print Network [OSTI]

This study examines the dynamic characteristics of the in-plane tunable stiffness scanning microscope probe for an atomic force microscope (AFM). The analysis was carried out using finite element analysis (FEA) methods for ...

Vega González, Myraida Angélica

2005-01-01T23:59:59.000Z

87

In situ laser processing in a scanning electron microscope  

SciTech Connect (OSTI)

Laser delivery probes using multimode fiber optic delivery and bulk focusing optics have been constructed and used for performing materials processing experiments within scanning electron microscope/focused ion beam instruments. Controlling the current driving a 915-nm semiconductor diode laser module enables continuous or pulsed operation down to sub-microsecond durations, and with spot sizes on the order of 50 {micro}m diameter, achieving irradiances at a sample surface exceeding 1 MW/cm{sup 2}. Localized laser heating has been used to demonstrate laser chemical vapor deposition of Pt, surface melting of silicon, enhanced purity, and resistivity via laser annealing of Au deposits formed by electron beam induced deposition, and in situ secondary electron imaging of laser induced dewetting of Au metal films on SiO{sub x}.

Roberts, Nicholas [University of Tennessee, Knoxville (UTK); Fowlkes, Jason Davidson [ORNL; Rack, Prof. Philip [University of Tennessee, Knoxville (UTK); Moore, Tom [OmniProbe, Inc.; Magel, Greg [OmniProbe, Inc.; Hartfield, Cheryl [OmniProbe, Inc.

2012-01-01T23:59:59.000Z

88

In situ laser processing in a scanning electron microscope  

SciTech Connect (OSTI)

Laser delivery probes using multimode fiber optic delivery and bulk focusing optics have been constructed and used for performing materials processing experiments within scanning electron microscope/focused ion beam instruments. Controlling the current driving a 915-nm semiconductor diode laser module enables continuous or pulsed operation down to sub-microsecond durations, and with spot sizes on the order of 50 {mu}m diameter, achieving irradiances at a sample surface exceeding 1 MW/cm{sup 2}. Localized laser heating has been used to demonstrate laser chemical vapor deposition of Pt, surface melting of silicon, enhanced purity, and resistivity via laser annealing of Au deposits formed by electron beam induced deposition, and in situ secondary electron imaging of laser induced dewetting of Au metal films on SiO{sub x}.

Roberts, Nicholas A.; Magel, Gregory A.; Hartfield, Cheryl D.; Moore, Thomas M.; Fowlkes, Jason D.; Rack, Philip D. [Department of Materials Science and Engineering, University of Tennessee, Knoxville, Tennessee 37996 (United States) and Omniprobe, Inc., an Oxford Instruments Company, 10410 Miller Rd., Dallas, Texas 75238 (United States); Omniprobe, Inc., an Oxford Instruments Company, 10410 Miller Rd., Dallas, Texas 75238 (United States); Center for Nanophase Materials Sciences, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831 (United States); Department of Materials Science and Engineering, University of Tennessee, Knoxville, Tennessee 37996 (United States) and Center for Nanophase Materials Sciences, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831 (United States)

2012-07-15T23:59:59.000Z

89

Macroscopic observables experimentally linked to microscopic processes in the explosive fracture and fragmentation of metals  

SciTech Connect (OSTI)

The response of a metal element to explosive loading depends on a broad spectrum of explosive and metal properties, macroscopic geometry plays a crucial role in defining the localized loading history and the resulting gradients of interest, while microscopic effects and defects are generally believed responsible for damage nucleation. Certain experiments reduce the complexity by producing conditions that are uniform in some sense, allowing dynamic measurement of variables that can be correlated with corresponding microscopic effects observed in recovery experiments. Spherical expansion of thin shells, that eventually fragment, and steady wave loading of flat plates are two such experiments. Proton radiography, x-radiography, laser velocimetry, imaging IR, and visible light photography all have produced dynamic measurements in 4340 steel, copper, uranium alloys, tantalum, and titanium. Correlation of the macroscopic measurements with microscopy on recovered samples has been done with a statistical approach.

Hull, Lawrence M [Los Alamos National Laboratory

2010-12-16T23:59:59.000Z

90

Ponderomotive phase plate for transmission electron microscopes  

DOE Patents [OSTI]

A ponderomotive phase plate system and method for controllably producing highly tunable phase contrast transfer functions in a transmission electron microscope (TEM) for high resolution and biological phase contrast imaging. The system and method includes a laser source and a beam transport system to produce a focused laser crossover as a phase plate, so that a ponderomotive potential of the focused laser crossover produces a scattering-angle-dependent phase shift in the electrons of the post-sample electron beam corresponding to a desired phase contrast transfer function.

Reed, Bryan W. (Livermore, CA)

2012-07-10T23:59:59.000Z

91

Scanning tip microwave near field microscope  

DOE Patents [OSTI]

A microwave near field microscope has a novel microwave probe structure wherein the probing field of evanescent radiation is emitted from a sharpened metal tip instead of an aperture or gap. This sharpened tip, which is electrically and mechanically connected to a central electrode, extends through and beyond an aperture in an endwall of a microwave resonating device such as a microwave cavity resonator or a microwave stripline resonator. Since the field intensity at the tip increases as the tip sharpens, the total energy which is radiated from the tip and absorbed by the sample increases as the tip sharpens. The result is improved spatial resolution without sacrificing sensitivity.

Xiang, Xiao-Dong (Alameda, CA); Schultz, Peter G. (Oakland, CA); Wei, Tao (Albany, CA)

1998-01-01T23:59:59.000Z

92

Nanomanipulation of biological samples using a compact atomic force microscope under scanning electron microscope observation  

Science Journals Connector (OSTI)

......Leakage of the EB current to the micro-electric circuit of the piezo-resistive sensor...Science and Technology, Development of elementary techniques for electron microscope in...Superfine R, Washburn S. In situ resistance measurements of strained carbon nanotubes......

Futoshi Iwata; Yuya Mizuguchi; Hideyuki Ko; Tatsuo Ushiki

2011-12-01T23:59:59.000Z

93

Development of a combined interference microscope objective and scanning probe microscope  

Science Journals Connector (OSTI)

A compact sensor head combining optical interference and scanning probe microscopy in a single instrument has been developed. This instrument is able to perform complementary quantitative measurements combining fast nondestructive three-dimensional surface analysis with high lateral resolution imaging. A custom interference microscopesensor head has been designed as the optical microscope objective and integrated within the architecture of a commercial interference microscope. The combined instrument makes available both the acquisition software and the hardware interface of the commercial microscope. The latter is able to function as a phase-shift interferometer or white light interferometer. Furthermore the use of an optical fiber to transmit light from an external laser: (i) removes a major heat source from the measurement environment and (ii) makes aperture correction unnecessary. The lateral resolution of the instrument has been extended by the addition of a previously developed compact scanning probe microscope(SPM) module to the custom interference microscope objective. This SPM unit is based upon piezoresistive cantilever technology. The “piezolevers” are self-sensing and therefore require no additional systems such as optical beam deflection or fiber interferometry to monitor their displacement. The mechanical simplicity of the piezolever SPM unit allows for a small physical size and can thus be added to the custom optical sensor head without violating constraints on the working distance defined by the optics. A major benefit of the system in terms of a quantitative nanometrology is the possibility to perform a traceable and direct calibration of the SPM module. This calibration is achieved practically by measuring an appropriate sample at a common location using both techniques. Results are presented here for the measurement of two calibration standards and a test sample to demonstrate the increased lateral resolution of the instrument.

James W. G. Tyrrell; Claudio Dal Savio; Rolf Krüger-Sehm; Hans-Ulrich Danzebrink

2004-01-01T23:59:59.000Z

94

Long working distance incoherent interference microscope  

DOE Patents [OSTI]

A full-field imaging, long working distance, incoherent interference microscope suitable for three-dimensional imaging and metrology of MEMS devices and test structures on a standard microelectronics probe station. A long working distance greater than 10 mm allows standard probes or probe cards to be used. This enables nanometer-scale 3-dimensional height profiles of MEMS test structures to be acquired across an entire wafer while being actively probed, and, optionally, through a transparent window. An optically identical pair of sample and reference arm objectives is not required, which reduces the overall system cost, and also the cost and time required to change sample magnifications. Using a LED source, high magnification (e.g., 50.times.) can be obtained having excellent image quality, straight fringes, and high fringe contrast.

Sinclair, Michael B. (Albuquerque, NM); De Boer, Maarten P. (Albuquerque, NM)

2006-04-25T23:59:59.000Z

95

Three-dimensional scanning confocal laser microscope  

DOE Patents [OSTI]

A confocal microscope for generating an image of a sample includes a first scanning element for scanning a light beam along a first axis, and a second scanning element for scanning the light beam at a predetermined amplitude along a second axis perpendicular to the first axis. A third scanning element scans the light beam at a predetermined amplitude along a third axis perpendicular to an imaging plane defined by the first and second axes. The second and third scanning element are synchronized to scan at the same frequency. The second and third predetermined amplitudes are percentages of their maximum amplitudes. A selector determines the second and third predetermined amplitudes such that the sum of the percentages is equal to one-hundred percent.

Anderson, R. Rox (Lexington, MA); Webb, Robert H. (Lincoln, MA); Rajadhyaksha, Milind (Charlestown, MA)

1999-01-01T23:59:59.000Z

96

Microscopic study of Ca$+$Ca fusion  

E-Print Network [OSTI]

We investigate the fusion barriers for reactions involving Ca isotopes $\\mathrm{^{40}Ca}+\\mathrm{^{40}Ca}$, $\\mathrm{^{40}Ca}+\\mathrm{^{48}Ca}$, and $\\mathrm{^{48}Ca}+\\mathrm{^{48}Ca}$ using the microscopic time-dependent Hartree-Fock theory coupled with a density constraint. In this formalism the fusion barriers are directly obtained from TDHF dynamics. We also study the excitation of the pre-equilibrium GDR for the $\\mathrm{^{40}Ca}+\\mathrm{^{48}Ca}$ system and the associated $\\gamma$-ray emission spectrum. Fusion cross-sections are calculated using the incoming-wave boundary condition approach. We examine the dependence of fusion barriers on collision energy as well as on the different parametrizations of the Skyrme interaction.

R. Keser; A. S. Umar; V. E. Oberacker

2012-02-17T23:59:59.000Z

97

A compact scanning soft X-ray microscope  

SciTech Connect (OSTI)

Soft x-ray microscopes operating at wavelengths between 2.3 nm and 4.4 nm are capable of imaging wet biological cells with a resolution many times that of a visible light microscope. Several such soft x-ray microscopes have been constructed. However, with the exception of contact microscopes, all use synchrotrons as the source of soft x-ray radiation and Fresnel zone plates as the focusing optics. These synchrotron based microscopes are very successful but have the disadvantage of limited access. This dissertation reviews the construction and performance of a compact scanning soft x-ray microscope whose size and accessibility is comparable to that of an electron microscope. The microscope uses a high-brightness laser-produced plasma as the soft x-ray source and normal incidence multilayer-coated mirrors in a Schwarzschild configuration as the focusing optics. The microscope operates at a wavelength of 14 nm, has a spatial resolution of 0.5 {mu}m, and has a soft x-ray photon flux through the focus of 10{sup 4}-10{sup 5} s{sup {minus}1} when operated with only 170 mW of average laser power. The complete system, including the laser, fits on a single 4{prime} x 8{prime} optical table. The significant components of the compact microscope are the laser-produced plasma (LPP) source, the multilayer coatings, and the Schwarzschild objective. These components are reviewed, both with regard to their particular use in the current microscope and with regard to extending the microscope performance to higher resolution, higher speed, and operation at shorter wavelengths. Measurements of soft x-ray emission and debris emission from our present LPP source are presented and considerations given for an optimal LPP source. The LPP source was also used as a broadband soft x-ray source for measurement of normal incidence multilayer mirror reflectance in the 10-25 nm spectral region.

Trail, J.A.

1989-01-01T23:59:59.000Z

98

On the microscopic origin of light scattering in tissue  

Science Journals Connector (OSTI)

Understanding the nature of light scattering within tissue is a crucial issue for development of medical imaging techniques. Microscopic measurements of static light-scattering...

Kaplan, Peter; Weissman, Jesse; Hancewicz, Tom; Popp, Alois; Weitz, David

99

A Low-Cost Reflectance FT-IR Microscope  

Science Journals Connector (OSTI)

A Fourier transform infrared spectroscopy (FT-IR) microscope combines microscopy with infrared (IR) spectroscopic molecular characterization. IR microspectroscopy presents a...

Jansen, J A J; Van Der Maas, J H; Posthuma De Boer, A

1991-01-01T23:59:59.000Z

100

Microscopic Reactive Diffusion of Uranium in the Contaminated...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

States. Abstract: Microscopic and spectroscopic analysis of uranium-contaminated sediment cores beneath the BX waste tank farm at the US Department of Energy (DOE) Hanford...

Note: This page contains sample records for the topic "microscopic double-slit experiment" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


101

E-Print Network 3.0 - automated microscopic characterization...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

characterization problems with the help... in the electron optics, alignment and optimization of electron microscopes. Students will have plenty... of opportunities for hands-on...

102

High resolution electron microscopic studies on ferrosilite III  

Science Journals Connector (OSTI)

High resolution transmission electron microscopic (HRTEM) studies on ferrosilite (Fs) III confirmed the periodicity nine (p=9) of the tetrahedral chains in this silicate. Various chain periodicit...

M. Czank; B. Simons

1983-05-01T23:59:59.000Z

103

A New Interpretation of the Scanning Tunneling Microscope Image...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

of Graphite. A New Interpretation of the Scanning Tunneling Microscope Image of Graphite. Abstract: In this work, highly-resolved scanning tunneling microscopy images of graphite...

104

Energy-Dependence of Elastic Alpha-Particle Scattering - Microscopic Model  

E-Print Network [OSTI]

, Cambridge, Massachusetts 02139 (Received 8 June 1972) The energy dependence of elastic n scattering from 4 Ca between 39.6 and 115.4 MeV is determined using a microscopic optical model. The agreement between theory and experi- ment improves as the energy... applied to the scattering of e particles from 40 to 166 MeV' ' ' ' ' and good agreement with experiment has been obtained. Once XV,?has been determined, E(l. (l) can be used to predict the scattering of a particles (in the diffraction region) given a...

Lerner, G. M.; Rutledge, L. L.; Hiebert, John C.; Bernstein, A. M.

1972-01-01T23:59:59.000Z

105

A microscopic model for thin lm spreading Douglas B. Abraham 1 , Rodolfo Cuerno 2 , and Esteban Moro 1  

E-Print Network [OSTI]

A microscopic model for thin #12;lm spreading Douglas B. Abraham 1 , Rodolfo Cuerno 2 , and Esteban-temporal uc- tuations of the precursor #12;lm observed in spreading experiments. Matter is transported both;lm about one molecule thick; this can be followed laterally out to an extension of the order of 10 7

Moro, Esteban

106

Visual Positioning of Previously Defined ROIs on Microscopic Slides  

E-Print Network [OSTI]

1 Visual Positioning of Previously Defined ROIs on Microscopic Slides Grigory Begelman, Michael slide area. Various microscopy related medical applications, such as telepathology and computer aided of interest. In this paper we present a method for image-based auto positioning on a microscope slide

Rivlin, Ehud

107

Performance of actinic EUVL mask imaging using a zoneplate microscope  

SciTech Connect (OSTI)

The SEMATECH Berkeley Actinic Inspection Tool (AIT) is a dual-mode, scanning and imaging extreme-ultraviolet (EUV) microscope designed for pre-commercial EUV mask research. Dramatic improvements in image quality have been made by the replacement of several critical optical elements, and the introduction of scanning illumination to improve uniformity and contrast. We report high quality actinic EUV mask imaging with resolutions as low as 100-nm half-pitch, (20-nm, 5x wafer equivalent size), and an assessment of the imaging performance based on several metrics. Modulation transfer function (MTF) measurements show high contrast imaging for features sizes close to the diffraction-limit. An investigation of the illumination coherence shows that AIT imaging is much more coherent than previously anticipated, with {sigma} below 0.2. Flare measurements with several line-widths show a flare contribution on the order of 2-3% relative intensity in dark regions above the 1.3% absorber reflectivity on the test mask used for these experiments. Astigmatism coupled with focal plane tilt are the dominant aberrations we have observed. The AIT routinely records 250-350 high-quality images in numerous through-focus series per 8-hour shift. Typical exposure times range from 0.5 seconds during alignment, to approximately 20 seconds for high-resolution images.

Goldberg, K; Naulleau, P; Barty, A; Rekawa, S; Kemp, C; Gunion, R; Salmassi, F; Gullikson, E; Anderson, E; Han, H

2007-09-25T23:59:59.000Z

108

KISMET tungsten dispersal experiment  

SciTech Connect (OSTI)

Results of the KISMET tungsten dispersal experiment indicate a relatively small degree of wall-rock contamination caused by this underground explosive experiment. Designed as an add-on to the KISMET test, which was performed in the U-1a.02 drift of the LYNER facility at Nevada Test Site on 1 March 1995, this experiment involved recovery and analysis of wall-rock samples affected by the high- explosive test. The chemical, high-explosive blast drove tungsten powder, placed around the test package as a plutonium analog, into the surrounding wall- rock alluvium. Sample analyses by an analytical digital electron microscope (ADEM) show tungsten dispersed in the rock as tiny (<10 {mu}m) particles, agglomerates, and coatings on alluvial clasts. Tungsten concentrations, measured by energy dispersive spectral analysis on the ADEM, indicate penetration depths less than 0.1 m and maximum concentrations of 1.5 wt % in the alluvium.

Wohletz, K.; Kunkle, T.; Hawkins, W.

1996-12-01T23:59:59.000Z

109

Simultaneous STM and UHV electron microscope observation of silicon nanowires extracted from Si(111) surface  

Science Journals Connector (OSTI)

......research-article Articles Simultaneous STM and UHV electron microscope observation of silicon...silicon|tungsten| Simultaneous STM and UHV electron microscope observation of silicon...Semiconductor Special Issue Simultaneous STM and UHV electron microscope observation of silicon......

Y. Naitoh; K. Takayanagi; Y. Oshima; H. Hirayama

2000-01-01T23:59:59.000Z

110

NCEM National Center for Electron Microscopy: Microscopes and Facilities:  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

0.5 0.5 The TEAM 0.5 microscope is a double-aberration-corrected (scanning) transmission electron microscope (STEM/TEM) capable of producing images with 50 pm resolution. The basic instrument is a modified FEI Titan 80-300 microscope equipped with a special high-brightness Schottky-field emission electron source, a gun monochromator, a high-resolution GIF Tridiem energy-filter, and two CEOS hexapole-type spherical aberration correctors. The illumination aberration corrector corrects coherent axial aberrations up to 4th order, as well as 5th order spherical aberration and six-fold astigmatism. The imaging aberration corrector fully corrects for coherent axial aberrations up to 3rd order and partially compensates for 4th and 5th order aberrations. The microscope has two 2048x2048 slow-scan CCD

111

Optical system for high-speed Atomic Force Microscope  

E-Print Network [OSTI]

This thesis presents the design and development of an optical cantilever deflection sensor for a high speed Atomic Force Microscope (AFM). This optical sensing system is able to track a small cantilever while the X-Y scanner ...

Lim, Kwang Yong, S.M. Massachusetts Institute of Technology

2010-01-01T23:59:59.000Z

112

Electron microscopy and microanalysis Two transmission electron microscopes  

E-Print Network [OSTI]

Electron microscopy and microanalysis Two transmission electron microscopes (TEM) and three scanning electron micro- scopes (SEM) are operated by the De- partment. Attachments for TEM include energy dispersive X-ray spectrometer (EDS), scanning transmission attachment, serial electron energy loss

113

Department of Mechanical Engineering "Heat Under the Microscope  

E-Print Network [OSTI]

applications ranging from thermoelectric waste heat recovery to radio astronomy. BIOGRAPHY Austin MinnichDepartment of Mechanical Engineering presents "Heat Under the Microscope: Uncovering an essential role in nearly every technological application, ranging from space power generation to consumer

Militzer, Burkhard

114

Lensless digital holographic microscope with light-emitting diode illumination  

Science Journals Connector (OSTI)

We demonstrate the operation of a digital in-line microscope with LED illumination. We show with a practical example that, for typical setups, the limited temporal coherence and the...

Repetto, L; Piano, E; Pontiggia, C

2004-01-01T23:59:59.000Z

115

Design and analysis of a monolithic flexure atomic force microscope  

E-Print Network [OSTI]

This thesis details the design, manufacture, and testing of a sub-nanometer accuracy atomic force microscope. It was made to be integrated into the Sub-Atomic Measuring Machine (SAMM) in collaboration with the University ...

Ljubicic, Dean M

2008-01-01T23:59:59.000Z

116

Development of a Schwarzschild-type x-ray microscope  

Science Journals Connector (OSTI)

A Schwarzschild-type x-ray microscope has been designed, constructed, and tested. Ni/C multilayers were used as the x-ray mirrors, with a thickness (2d) of 7 nm and 30 layer pairs. The...

Kado, M; Yamashita, K; Ohtani, M; Tanaka, K A; Kodama, R; Kitamoto, S; Yamanaka, T; Nakai, S

1991-01-01T23:59:59.000Z

117

Microscopic observations of samples affected by delayed ettringite formation (DEF)  

Science Journals Connector (OSTI)

This article, which deals with the study of the microscopic modifications of DEF-affected materials, has two main objectives. The first one is to study the influence of sample preparation on the microcracks of sp...

Nordine Leklou; Jean-Emmanuel Aubert; Gilles Escadeillas

2009-12-01T23:59:59.000Z

118

Construction of an ultra-low temperature scanning tunneling microscope  

Science Journals Connector (OSTI)

We describe designs and specifications of an ultra-low temperature scanning tunneling microscope developed at ... works over a wide temperature range between 90 mK and 300 K with atomic resolution as...

Hiroshi Fukuyama; Hiroki Tan; Tetsuya Handa…

1996-01-01T23:59:59.000Z

119

Four generations of high-voltage electron microscopes  

Science Journals Connector (OSTI)

......microscopes 307 Table 3 Edge lengths of elementary cubes. a0, and separations...data were obtained by electrical resistance measurements [41,42], those...measure- ment of the residual electric resistance using 'conven- tional' accelerator......

Alfred Seeger

1999-01-01T23:59:59.000Z

120

Microscopic observations on a kinetic Ising model  

Science Journals Connector (OSTI)

We comment on the practical realization and physical relevance of a k i n e t i cIsing model which has played an important role during the last decade as a guide for real experiments and for the development of theory. We stress the possibility of performing m i c r o s c o p i c observations during the computer evolution of the model system. This is illustrated by discussing the observed behavior of some general concepts of physics such as energy specific heat and metastable states.

J. Marro; R. Toral

1986-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "microscopic double-slit experiment" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


121

MODIFYING AN INVERTED LABORATORY MICROSCOPE FOR RAMAN Presented in Partial Fulfillment of the Requirements for  

E-Print Network [OSTI]

MODIFYING AN INVERTED LABORATORY MICROSCOPE FOR RAMAN MICROSCOPY A Thesis Presented in Partial modifications a spectroscopic imaging instrument, a Raman microscope, can be constructed from a common inverted

122

Atomic delocalisation as a microscopic origin of two-level defects in Josephson junctions  

E-Print Network [OSTI]

Identifying the microscopic origins of decoherence sources prevalent in Josephson junction based circuits is central to their use as functional quantum devices. Focussing on so called "strongly coupled" two-level defects, we construct a theoretical model using the atomic position of the oxygen which is spatially delocalised in the oxide forming the Josephson junction barrier. Using this model, we investigate which atomic configurations give rise to two-level behaviour of the type seen in experiments. We compute experimentally observable parameters for phase qubits and examine defect response under the effects of applied electric field and strain.

Timothy C. DuBois; Salvy P. Russo; Jared H. Cole

2014-08-25T23:59:59.000Z

123

Direct photon emission in Heavy Ion Collisions from Microscopic Transport Theory and Fluid Dynamics  

E-Print Network [OSTI]

Direct photon emission in heavy-ion collisions is calculated within a relativistic micro+macro hybrid model and compared to the microscopic transport model UrQMD. In the hybrid approach, the high-density part of the collision is calculated by an ideal 3+1-dimensional hydrodynamic calculation, while the early (pre-equilibrium-) and late (rescattering-) phase are calculated with the transport model. Different scenarios of the transition from the macroscopic description to the transport model description and their effects are studied. The calculations are compared to measurements by the WA98-collaboration and predictions for the future CBM-experiment are made.

Bjoern Baeuchle; Marcus Bleicher

2010-03-29T23:59:59.000Z

124

Microscopic reversal behavior of magnetically capped nanospheres  

Science Journals Connector (OSTI)

The magnetic switching behavior of Co/Pd multilayer-capped nanospheres is investigated by x-ray spectro-holography. Images of the magnetic state of individual nanocaps are recorded as a function of externally applied magnetic field and the angle under which the field is applied, pertaining to magnetic data storage applications with patterned, tilted, and perpendicular storage media. Dispersed nanospheres with different coverage in the submonolayer regime are investigated simultaneously in a multiplexed experiment. In clustered nanosphere arrangements, we find that individual switching events are influenced by dipolar magnetostatic interactions. Micromagnetic simulations of the switching behavior complement the experimental observations, corroborating the influence of thermal activation processes and magnetostatic interactions in this system. Such magnetostatic interactions could lead to undesired cross-talk between bits in ultrahigh-density magnetic recording applications.

C. M. Günther; O. Hellwig; A. Menzel; B. Pfau; F. Radu; D. Makarov; M. Albrecht; A. Goncharov; T. Schrefl; W. F. Schlotter; R. Rick; J. Lüning; S. Eisebitt

2010-02-17T23:59:59.000Z

125

A new scanning photoemission microscope for ELETTRA: SuperMAXIMUM  

Science Journals Connector (OSTI)

High brightness third?generation synchrotrons allow diffraction?limited performance and large flux for scanning photoemission microscopes. A new microscope SuperMAXIMUM is being developed at the University of Wisconsin Center for X ray Lithography in collaboration with the Sincrotrone Trieste. The beamline being built in Trieste uses a variable angle spherical gratingmonochromator (VASGM). A combination of rotation of a plane mirror and rotation of the spherical grating keeps the slit positions and beam directions fixed. The microscope objectives are normal?incidence multilayer?coated Schwarzschild objectives. The project which is nearing completion utilizes novel designs for optics alignment sample rastering mechanics and software control. We will discuss the project status new designs and techniques.

John T. Welnak; H. Solak; J. Wallace; F. Cerrina; F. Barbo; M. Bertolo; A. Bianco; S. Di Fonzo; S. Fontana; W. Jark; F. Mazzolini; R. Rosei; A. Savoia; J.H. Underwood; G. Margaritondo

1996-01-01T23:59:59.000Z

126

A new scanning photoemission microscope for ELETTRA: SuperMAXIMUM  

SciTech Connect (OSTI)

High brightness, third-generation synchrotrons allow diffraction-limited performance and large flux for scanning photoemission microscopes. A new microscope, SuperMAXIMUM, is being developed at the University of Wisconsin Center for X ray Lithography in collaboration with the Sincrotrone Trieste. The beamline, being built in Trieste, uses a variable angle spherical grating monochromator (VASGM). A combination of rotation of a plane mirror and rotation of the spherical grating keeps the slit positions and beam directions fixed. The microscope objectives are normal-incidence, multilayer-coated Schwarzschild objectives. The project, which is nearing completion, utilizes novel designs for optics alignment, sample rastering mechanics, and software control. We will discuss the project status, new designs, and techniques. {copyright} {ital 1996 American Institute of Physics.}

Welnak, J.T.; Solak, H.; Wallace, J.; Cerrina, F.; Barbo, F.; Bertolo, M.; Bianco, A.; Di Fonzo, S.; Fontana, S.; Jark, W.; Mazzolini, F.; Rosei, R.; Savoia, A.; Underwood, J.; Margaritondo, G. [University of WI--Center for X ray Lithography, 3731 Schneider Drive, Stoughton, WI 53589 (United States)] [University of WI--Center for X ray Lithography, 3731 Schneider Drive, Stoughton, WI 53589 (United States); [Sincrotrone Trieste, Padriciano 99, 34012, Trieste (Italy); [Lawrence Berkeley Laboratory, Center for X ray Optics, 1 Cyclotron Road, 80-101, Berkeley, CA 94720 (United States); [Institut de Physique Appliqee, Ecole Polytechnique Federale, CH-1015, Lausanne (Switzerland)

1996-09-01T23:59:59.000Z

127

Reflection soft X-ray microscope and method  

DOE Patents [OSTI]

A reflection soft X-ray microscope is provided by generating soft X-ray beams, condensing the X-ray beams to strike a surface of an object at a predetermined angle, and focusing the X-ray beams reflected from the surface onto a detector, for recording an image of the surface or near surface features of the object under observation.

Suckewer, Szymon (Princeton, NJ); Skinner, Charles H. (Lawrenceville, NJ); Rosser, Roy (Princeton, NJ)

1993-01-01T23:59:59.000Z

128

Mechanisms of Nickel Sorption on Pyrophyllite: Macroscopic and Microscopic Approaches  

E-Print Network [OSTI]

Mechanisms of Nickel Sorption on Pyrophyllite: Macroscopic and Microscopic Approaches Andre M of the sorption mechanisms of heavy metals on soil mineral surfaces is therefore of fundamental importance. This study examined Ni(Il) sorption mechanisms on pyrophyllite. The removal of Ni from solution was studied

Sparks, Donald L.

129

Vibration Proof Construction of 1000kV Electron Microscope  

Science Journals Connector (OSTI)

......University Press 1970 other ORIGINAL Vibration Proof Construction of 1000kV Electron...with the center of gravity. That is, a vibration proof hanging console was made as a method...protecting a 1000kV Electron Microscope from vibration, and this allowed the whole instrument......

Yoshio SAKITANI; Susumu OZASA

1970-01-01T23:59:59.000Z

130

Neutrinoless double beta decay in the microscopic interacting boson model  

Science Journals Connector (OSTI)

The results of a calculation of the nuclear matrix elements for neutrinoless double beta decay in the closure approximation in several nuclei within the framework of the microscopic interacting boson model (IBM?2) are presented and compared with those calculated in the shell model (SM) and quasiparticle random phase approximation (QRPA).

F. Iachello

2009-01-01T23:59:59.000Z

131

Quantum microscopic approach to low-energy heavy ion collisions  

E-Print Network [OSTI]

of nuclear reactions at low energy where quantum effects play a significant role is an important challenge of nuclear physics. The interplay between nuclear structure and reaction mechanisms is crucial at energiesQuantum microscopic approach to low-energy heavy ion collisions C´edric Simenel1,2, Aditya Wakhle2

132

Microscopic description of neutron emission rates in compound nuclei  

E-Print Network [OSTI]

The neutron emission rates in thermal excited nuclei are conventionally described by statistical models with a phenomenological level density parameter that depends on excitation energies, deformations and mass regions. In the microscopic view of hot nuclei, the neutron emission rates can be determined by the external neutron gas densities without any free parameters. Therefore the microscopic description of thermal neutron emissions is desirable that can impact several understandings such as survival probabilities of superheavy compound nuclei and neutron emissivity in reactors. To describe the neutron emission rates microscopically, the external thermal neutron gases are self-consistently obtained based on the Finite-Temperature Hartree-Fock-Bogoliubov (FT-HFB) approach. The results are compared with the statistical model to explore the connections between the FT-HFB approach and the statistical model. The Skyrme FT-HFB equation is solved by HFB-AX in deformed coordinate spaces. Based on the FT-HFB approach, the thermal properties and external neutron gas are properly described with the self-consistent gas substraction procedure. Then neutron emission rates can be obtained based on the densities of external neutron gases. The thermal statistical properties of $^{238}$U and $^{258}$U are studied in detail in terms of excitation energies. The thermal neutron emission rates in $^{238, 258}$U and superheavy compound nuclei $_{112}^{278}$Cn and $_{114}^{292}$Fl are calculated, which agree well with the statistical model by adopting an excitation-energy-dependent level density parameter. The coordinate-space FT-HFB approach can provide reliable microscopic descriptions of neutron emission rates in hot nuclei, as well as microscopic constraints on the excitation energy dependence of level density parameters for statistical models.

Yi Zhu; Junchen Pei

2014-11-02T23:59:59.000Z

133

Quantum Jump Approach to Switching Process of a Josephson Junction Coupled to a Microscopic Two-Level System  

E-Print Network [OSTI]

With microwave irradiation, the switching current of a Josephson junction coupled to a microscopic two-level system jumps randomly between two discrete states. We modeled the switching process of the coupled system with quantum jump approach that was generally used in quantum optics. The parameters that affect the character of the quantum jumps between macroscopic quantum states are discussed. The results obtained from our theoretical analysis agree well with those of the experiments and provide a clear physical picture for the macroscopic quantum jumps in Josephson junctions coupled with two-level systems. In addition, quantum jumps may serve as a useful tool to investigate the microscopic two-level structures in solid-state systems.

Xueda Wen; Yiwen Wang; Ning Dong; Guozhu Sun; Jian Chen; Lin Kang; Weiwei Xu; Peiheng Wu; Yang Yu

2009-07-14T23:59:59.000Z

134

Ignition Experiments  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Ignition Experiments The goal of many NIF experiments is to create a self-sustaining "burn" of fusion fuel (the hydrogen isotopes deuterium and tritium) that produces as much or...

135

NCEM National Center for Electron Microscopy: Microscopes and Facilities:  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

LIBRA LIBRA The 200kV Zeiss monochromated LIBRA 200MC is designed to produce high contrast imaging for TEM and STEM and either convergent beam or parallel beam diffraction using Koehler illumination.In addition, the incorporation of a monochromator into the field emission gun enables energy resolution of ~0.15eV for electron energy loss spectroscopy. The dedicated in-column Omega Filter implemented in this microscope also can be used for both spectroscopic analysis and energy-filtered imaging with a 2048x2048 CCD camera. The high tilt capability of the stage and pole piece accepts various types of analytical holders.This microscope is optimized for soft materials applications that require either the high contrast imaging performance or analytical methods such as EF-TEM and STEM.( Instrument

136

NCEM National Center for Electron Microscopy: Microscopes and Facilities:  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

AEM AEM AEME The Analytical Electron Microscope is optimized for elemental microanalysis. The basic instrument is a JEOL 200CX microscope with a side-entry double-tilt goniometer stage and an assortment of specimen holders. This machine can be operated at between 80 and 200 kV in the TEM or STEM mode. Electron energy loss and x-ray signals for elemental microanalysis or spectral imaging can be collected either separately or simultaneously using probe diameters from 6nm to 100nm. Diffraction modes include convergent beam diffraction for three-dimensional structure information and micro-diffraction with a minimum probe size of 20nm. For updates or details, contact Zonghoon Lee or Velimir Radmilovic. The instrument is equipped with two Kevex EDXS detectors and a Gatan PEELS

137

Competitive egress behaviour: a fuzzy logic-inspired microscopic model  

Science Journals Connector (OSTI)

Some recent tragic events in overcrowded situations, as well as the terrorist threat, have highlighted the importance of the availability of good models for pedestrian behaviour under emergency conditions. Existing approaches to crowd models are generally macroscopic or microscopic. In the first case, the crowd is considered to be like a fluid, so that its movement can be described through differential equations. In the second case, the collective behaviour of the crowd is the result of interactions among individual elements of the system. In this paper, we propose a microscopic model of crowd evacuation that incorporates the fuzzy perception and anxiety embedded in human reasoning. The outcomes of the model application, compared to those obtained by other existing models, seem to be quite satisfactory.

Mauro Dell'Orco

2007-01-01T23:59:59.000Z

138

The early history of the scanning electron microscope  

Science Journals Connector (OSTI)

The article begins with an account of prewar German work particularly that of von Ardenne who established the theoretical basis of a scanning electron microscope and constructed an instrument which was primarily intended to overcome chromatic aberration when relatively thick specimens were examined by transmission. Neither this microscope nor a different one built a few years later in the U. S. A. attained sufficient resolution to gain acceptance and the reasons for this are examined. The remainder of the article deals with work carried out in the Cambridge University Engineering Department over the years from 1948 to about 1965 when the first successful commercial instrument was produced. The contributions made by successive research students are explained as are also the nonscientific factors which influenced the course of the development.

C. W. Oatley

1982-01-01T23:59:59.000Z

139

An Estimate of Biofilm Properties using an Acoustic Microscope  

SciTech Connect (OSTI)

Noninvasive measurements over a biofilm, a three-dimensional community of microorganisms immobilized at a substratum, were made using an acoustic microscope operating at frequencies up to 70 MHz. Spatial variation of surface heterogeneity, thickness, interior structure, and biomass of a living biofilm was estimated over a 2.5-mm by 2.5-mm region. Ultrasound based estimates of thickness were corroborated using optical microscopy and the nominal biofilm thickness was 100 microns. Experimental data showed that the acoustic microscope combined with signal processing was capable of imaging and making quantitative estimates of the spatial distribution of biomass within the biofilm. The revealed surface topology and interior structure of the biofilm provide data for use in advanced biofilm mass transport models. The experimental acoustic and optical systems, methods to estimate of biofilm properties and potential applications for the resulting data are discussed.

Good, Morris S.; Wend, Christopher F.; Bond, Leonard J.; Mclean, Jeffrey S.; Panetta, Paul D.; Ahmed, Salahuddin; Crawford, Susan L.; Daly, Don S.

2006-09-01T23:59:59.000Z

140

Measurement of Semiconductor Surface Potential using the Scanning Electron Microscope  

SciTech Connect (OSTI)

We calibrate the secondary electron signal from a standard scanning electron microscope to voltage, yielding an image of the surface or near-surface potential. Data on both atomically abrupt heterojunction GaInP/GaAs and diffused homojunction Si solar cell devices clearly show the expected variation in potential with position and applied bias, giving depletion widths and locating metallurgical junctions to an accuracy better than 10 nm. In some images, distortion near the p-n junction is observed, seemingly consistent with the effects of lateral electric fields (patch fields). Reducing the tube bias removes this distortion. This approach results in rapid and straightforward collection of near-surface potential data using a standard scanning electron microscope.

Heath, J. T.; Jiang, C. S.; Al-Jassim, M. M.

2012-02-15T23:59:59.000Z

Note: This page contains sample records for the topic "microscopic double-slit experiment" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


141

Microscopic Optical Potentials for Helium-6 Scattering off Protons  

E-Print Network [OSTI]

The differential cross section and the analyzing power are calculated for elastic scattering of $^6$He from a proton target using a microscopic folding optical potential, in which the $^6$He nucleus is described in terms of a $^4$He-core with two additional neutrons in the valence p-shell. In contrast to previous work of that nature, all contributions from the interaction of the valence neutrons with the target protons are taken into account.

Ch. Elster; A. Orazbayev; S. P. Weppner

2012-09-28T23:59:59.000Z

142

A Microscopic Traffic Simulation Model for Transportation Planning in Georgios Papageorgiou, Pantelis Damianou, Andreas Pitsilides  

E-Print Network [OSTI]

A Microscopic Traffic Simulation Model for Transportation Planning in Cyprus Georgios Papageorgiou. This paper presents the microscopic simulation model development of a major traffic network of Nicosia simulation model is developed and utilized for transportation planning. 1. Introduction The demand

Pitsillides, Andreas

143

Selective nano-patterning of graphene using a heated atomic force microscope tip  

SciTech Connect (OSTI)

In this study, we introduce a selective thermochemical nano-patterning method of graphene on insulating substrates. A tiny heater formed at the end of an atomic force microscope (AFM) cantilever is optimized by a finite element method. The cantilever device is fabricated using conventional micromachining processes. After preliminary tests of the cantilever device, nano-patterning experiments are conducted with various conducting and insulating samples. The results indicate that faster scanning speed and higher contact force are desirable to reduce the sizes of nano-patterns. With the experimental condition of 1 ?m/s and 24 mW, the heated AFM tip generates a graphene oxide layer of 3.6 nm height and 363 nm width, on a 300 nm thick SiO{sub 2} layer, with a tip contact force of 100 nN.

Choi, Young-Soo; Wu, Xuan; Lee, Dong-Weon, E-mail: mems@jnu.ac.kr [MEMS and Nanotechnology Laboratory, School of Mechanical Engineering, Chonnam National University, Gwangju (Korea, Republic of)] [MEMS and Nanotechnology Laboratory, School of Mechanical Engineering, Chonnam National University, Gwangju (Korea, Republic of)

2014-04-15T23:59:59.000Z

144

Refined tip preparation by electrochemical etching and ultrahigh vacuum treatment to obtain atomically sharp tips for scanning tunneling microscope and atomic force microscope  

SciTech Connect (OSTI)

A modification of the common electrochemical etching setup is presented. The described method reproducibly yields sharp tungsten tips for usage in the scanning tunneling microscope and tuning fork atomic force microscope. In situ treatment under ultrahigh vacuum (p {<=}10{sup -10} mbar) conditions for cleaning and fine sharpening with minimal blunting is described. The structure of the microscopic apex of these tips is atomically resolved with field ion microscopy and cross checked with field emission.

Hagedorn, Till; Ouali, Mehdi El; Paul, William; Oliver, David; Miyahara, Yoichi; Gruetter, Peter [Department of Physics, McGill University, 3600 Rue University, Montreal, QC H3A2T8 (Canada)

2011-11-15T23:59:59.000Z

145

Compact cryogenic Kerr microscope for time-resolved studies of electron spin transport in microstructures  

E-Print Network [OSTI]

Compact cryogenic Kerr microscope for time-resolved studies of electron spin transport A compact cryogenic Kerr microscope for operation in the small volume of high-field magnets is described-temperature optical microscope, elec- tromagnet and cryogenic cell with cold finger to measure continuous-wave cw

van der Wal, Caspar H.

146

Hands-On and Minds-On Modeling Activities to Improve Students' Conceptions of Microscopic Friction  

E-Print Network [OSTI]

Hands-On and Minds-On Modeling Activities to Improve Students' Conceptions of Microscopic Friction of microscopic friction. We will also present our investigation on the relative effectiveness of the use, it is possible to facilitate the refinement of students' ideas of microscopic friction. Keywords: friction

Zollman, Dean

147

Digestion Experiments  

E-Print Network [OSTI]

Blank in Bulletin] BULLETIN NO. 291 FEBRUARY, 1922 DIGESTION EXPERIMENTS This is the sixth bulletin in a series whose object is to ascertain the Aceding value of Texas feeding stuffs by means of digestion experiments. Previous bulletins... The productive values and the values for digestible protein in t Bulletin have been calculated from the results of digestion esperiine? with sheep. The method of conducting the experiments is described Bulletins Nos. 147 and 166 of this Station. The production...

Fraps, G. S. (George Stronach)

1922-01-01T23:59:59.000Z

148

Quantifying Transient States in Materials with the Dynamic Transmission Electron Microscope  

SciTech Connect (OSTI)

The Dynamic Transmission Electron Microscope (DTEM) offers a means of capturing rapid evolution in a specimen through in-situ microscopy experiments by allowing 15 ns electron micrograph exposure times. The rapid exposure time is enabled by creating a burst of electrons at the emitter by ultraviolet pulsed laser illumination. This burst arrives a specified time after a second laser initiates the specimen reaction. The timing of the two Q-switched lasers is controlled by high-speed pulse generators with a timing error much less than the pulse duration. Both diffraction and imaging experiments can be performed, just as in a conventional TEM. The brightness of the emitter and the total current control the spatial and temporal resolutions. We have demonstrated 7 nm spatial resolution in single 15 ns pulsed images. These single-pulse imaging experiments have been used to study martensitic transformations, nucleation and crystallization of an amorphous metal, and rapid chemical reactions. Measurements have been performed on these systems that are possible by no other experimental approaches currently available.

Campbell, G; LaGrange, T; Kim, J; Reed, B; Browning, N

2009-09-21T23:59:59.000Z

149

Integrated windows-based control system for an electron microscope  

SciTech Connect (OSTI)

A Windows application has been developed for management and operation of beam instruments such as electron or ion microscopes. It provides a facility that allows an operator to manage a complicated instrument with minimal effort, primarily under mouse control. The hardware control components used on similar instruments (e.g., the scanning transmission electron microscopes in our lab), such as toggles, buttons, and potentiometers for adjustments on various scales, are all replaced by the controls of the Windows application and are addressable on a single screen. The new controls in this program (via adjustable software settings) offer speed of response and smooth operation providing tailored control of various instrument parameters. Along with the controls offering single parameter adjustment, a two-dimensional control was developed that allows two parameters to be coupled and addressed simultaneously. This capability provides convenience for such tasks as finding the beam'' and directing it to a location of interest on the specimen. Using an icon-based display, this Windows application provides better integrated and more robust information for monitoring instrument status than the indicators and meters of the traditional instrument controls. As a Windows application, this program is naturally able to share the resources of the Windows system and is thus able to link to many other applications such as our image acquisition and processing programs. Computer control provides automatic protection and instant diagnostics for the experimental instrument. This Windows application is fully functional and is in daily use to control a new type of electron microscope developed in our lab.

Ruan, S. (The Enrico Fermi Institute, The University of Chicago, Chicago, Illinois 60637 (United States)); Kapp, O.H. (The Department of Radiology and The Enrico Fermi Institute, The University of Chicago, Chicago, Illinois 60637 (United States))

1994-12-01T23:59:59.000Z

150

Microscopic aspects of the Staebler-Wronski effect  

SciTech Connect (OSTI)

The microscopic origin and the creation mechanisms of metastable, light-induced defects in hydrogenated amorphous silicon are reviewed. Based on excitonic electron-hole pair recombination, a consistent quantitative description of defect creation kinetics can be obtained, including the experimentally observed differences between continuous wave and pulsed illumination as well as the effect of competing recombination pathways in compensated material. High resolution spin resonance spectra obtained by low-field spin-dependent transport are used to examine the interaction of metastable defects with hydrogen.

Stutzmann, M.

1997-07-01T23:59:59.000Z

151

Cation Transport in Polymer Electrolytes: A Microscopic Approach  

E-Print Network [OSTI]

A microscopic theory for cation diffusion in polymer electrolytes is presented. Based on a thorough analysis of molecular dynamics simulations on PEO with LiBF$_4$ the mechanisms of cation dynamics are characterised. Cation jumps between polymer chains can be identified as renewal processes. This allows us to obtain an explicit expression for the lithium ion diffusion constant D_{Li} by invoking polymer specific properties such as the Rouse dynamics. This extends previous phenomenological and numerical approaches. In particular, the chain length dependence of D_{Li} can be predicted and compared with experimental data. This dependence can be fully understood without referring to entanglement effects.

A. Maitra; A. Heuer

2007-05-11T23:59:59.000Z

152

Propagation of nonlinearly generated harmonic spin waves in microscopic stripes  

SciTech Connect (OSTI)

We report on the experimental study of the propagation of nonlinearly generated harmonic spin waves in microscopic CoFeB stripes. Using an all electrical technique with coplanar waveguides, we find that two kinds of spin waves can be generated by nonlinear frequency multiplication. One has a non-uniform spatial geometry and thus requires appropriate detector geometry to be identified. The other corresponds to the resonant fundamental propagative spin waves and can be efficiently excited by double- or triple-frequency harmonics with any geometry. Nonlinear excited spin waves are particularly efficient in providing an electrical signal arising from spin wave propagation.

Rousseau, O. [Center for Emergent Matter Science, RIKEN, 2-1 Hirosawa, Wako 351-0198 (Japan); Yamada, M.; Miura, K.; Ogawa, S. [Hitachi, Ltd., Central Research Laboratory, 1-280 Higashi-koigakubo, Kokubunji, Tokyo 185-8601 (Japan); Otani, Y., E-mail: yotani@issp.u-tokyo.ac.jp [Center for Emergent Matter Science, RIKEN, 2-1 Hirosawa, Wako 351-0198 (Japan); Institute for Solid State Physics, University of Tokyo, Kashiwa 277-858 (Japan)

2014-02-07T23:59:59.000Z

153

Hydronuclear experiments  

SciTech Connect (OSTI)

Hydronuclear experiments, a method for assessing some aspects of nuclear weapon safety, were conducted at Los Alamos during the 1958 to 1961 moratorium on nuclear testing. The experiments resulted in subcritical multiplying assemblies or a very slight degree of supercriticality and, in some cases, involved a slight, but insignificant, fission energy release. These experiments helped to identify so-called one-point safety problems associated with some of the nuclear weapons systems of that time. The need for remedial action was demonstrated, although some of the necessary design changes could not be made until after the resumption of weapons testing at the end of 1961.

Thorn, R.N.; Westervelt, D.R.

1987-02-01T23:59:59.000Z

154

Calibrated nanoscale dopant profiling using a scanning microwave microscope  

SciTech Connect (OSTI)

The scanning microwave microscope is used for calibrated capacitance spectroscopy and spatially resolved dopant profiling measurements. It consists of an atomic force microscope combined with a vector network analyzer operating between 1-20 GHz. On silicon semiconductor calibration samples with doping concentrations ranging from 10{sup 15} to 10{sup 20} atoms/cm{sup 3}, calibrated capacitance-voltage curves as well as derivative dC/dV curves were acquired. The change of the capacitance and the dC/dV signal is directly related to the dopant concentration allowing for quantitative dopant profiling. The method was tested on various samples with known dopant concentration and the resolution of dopant profiling determined to 20% while the absolute accuracy is within an order of magnitude. Using a modeling approach the dopant profiling calibration curves were analyzed with respect to varying tip diameter and oxide thickness allowing for improvements of the calibration accuracy. Bipolar samples were investigated and nano-scale defect structures and p-n junction interfaces imaged showing potential applications for the study of semiconductor device performance and failure analysis.

Huber, H. P.; Hochleitner, M.; Hinterdorfer, P. [University of Linz, Christian Doppler Laboratory for Nanoscopic Methods in Biophysics, Altenbergerstrasse 69, 4040 Linz (Austria); Humer, I.; Smoliner, J. [Technical University of Vienna, Institute for Solid State Electronics, 1040 Vienna (Austria); Fenner, M.; Moertelmaier, M.; Rankl, C.; Tanbakuchi, H.; Kienberger, F. [Agilent Technologies, Inc., 5301 Stevens Creek Blvd., Santa Clara, California 95051 (United States); Imtiaz, A.; Wallis, T. M.; Kabos, P. [National Institute for Standards and Technology, Electromagnetic Division, 325 Broadway, Boulder, Colorado 80305-3337 (United States); Kopanski, J. J. [National Institute of Standards and Technology, Semiconductor Measurements Division, Gaithersburg, Maryland 20899-8120 (United States)

2012-01-01T23:59:59.000Z

155

Nanoscale electrostatic actuators in liquid electrolytes: analysis and experiment  

E-Print Network [OSTI]

. The experiment consisted of a fixed flat gold electrode and a movable gold electrode consisting of a gold sphere several micrometers in diameter mounted on the end of an Atomic Force Microscope (AFM) cantilever, which serves as the spring. The electrodes were...

Kim, Doyoung

2006-04-12T23:59:59.000Z

156

NCEM National Center for Electron Microscopy: Microscopes and Facilities:  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Specimen Preparation Specimen Preparation Preparation of samples with large transparent areas and flat surfaces is a key element of electron microscopy. In particular, the interpretation of lattice or holographic images is often limited by the sample's geometry and surface roughness. These parameters are largely determined by a particular sample preparation procedure. The increasing demand for microscopes with a spatial resolution of better than 1Ã… increases the need for improved sample preparation techniques. A substantial effort at NCEM is devoted to the development of reliable and specialized thinning techniques. Current programs explore the application of chemicals to shape the surfaces of thin films, the use of nanospheres for observation of small particles, and the

157

Microscopic nonequilibrium theory of quantum well solar cells  

Science Journals Connector (OSTI)

We present a microscopic theory of bipolar quantum well structures in the photovoltaic regime, based on the nonequilibrium Green’s function formalism for a multiband tight-binding Hamiltonian. The quantum kinetic equations for the single particle Green’s functions of electrons and holes are self-consistently coupled to Poisson’s equation, including intercarrier scattering on the Hartree level. Relaxation and broadening mechanisms are considered by the inclusion of acoustic and optical electron-phonon interaction in a self-consistent Born approximation of the scattering self-energies. Photogeneration of carriers is described on the same level in terms of a self-energy derived from the standard dipole approximation of the electron-photon interaction. Results from a simple two-band model are shown for the local density of states, spectral response, current spectrum, and current-voltage characteristics for generic single quantum well systems.

U. Aeberhard and R. H. Morf

2008-03-28T23:59:59.000Z

158

Recent results from parton cascade and microscopic transport  

E-Print Network [OSTI]

Parton cascade is a microscopic transport approach for the study of the space-time evolution of the Quark-Gluon Plasma produced in relativistic heavy ion collisions and its experimental manifestations. In the following, parton cascade calculations on elliptic flow and thermalization will be discussed. Dynamical evolution is shown to be important for the production of elliptic flow including the scaling and the breaking of the scaling of elliptic flow. The degree of thermalization is estimated using both an elastic parton cascade and a radiative transport model. A longitudinal to transverse pressure ratio, $P_L/P_T\\approx 0.8$, is shown to be expected in the central cell in central collisions. This provides information on viscous corrections to the ideal hydrodynamical approach.

Bin Zhang

2008-09-02T23:59:59.000Z

159

Microscopic return point memory in Co/Pd multilayer films  

SciTech Connect (OSTI)

We report soft x-ray speckle metrology measurements of microscopic return point and complementary point memory in Co/Pd magnetic films having perpendicular anisotropy. We observe that the domains assemble into a common labyrinth phase with a period that varies by nearly a factor of two between initial reversal and fields near saturation. Unlike previous studies of similar systems, the ability of the film to reproduce its domain structure after magnetic cycling through saturation varies from loop to loop, from position to position on the sample, and with the part of the speckle pattern used in the metrology measurements. We report the distribution of memory as a function of field and discuss these results in terms of the reversal process.

Seu, K.A.; Su, R.; Roy, S.; Parks, D.; Shipton, E.; Fullerton, E.E.; Kevan, S.D.

2009-10-01T23:59:59.000Z

160

Microscopic modulation of mechanical properties in transparent insect wings  

SciTech Connect (OSTI)

We report on the measurement of local friction and adhesion of transparent insect wings using an atomic force microscope cantilever down to nanometre length scales. We observe that the wing-surface is decorated with 10??m long and 2??m wide islands that have higher topographic height. The friction on the islands is two orders of magnitude higher than the back-ground while the adhesion on the islands is smaller. Furthermore, the high islands are decorated with ordered nano-wire-like structures while the background is full of randomly distributed granular nano-particles. Coherent optical diffraction through the wings produce a stable diffraction pattern revealing a quasi-periodic organization of the high islands over the entire wing. This suggests a long-range order in the modulation of friction and adhesion which is directly correlated with the topography. The measurements unravel novel functional design of complex wing surface and could find application in miniature biomimetic devices.

Arora, Ashima; Kumar, Pramod; Bhagavathi, Jithin; Singh, Kamal P., E-mail: kpsingh@iisermohali.ac.in; Sheet, Goutam, E-mail: goutam@iisermohali.ac.in [Department of Physical Sciences, Indian Institute of Science Education and Research, Mohali, Punjab 140306 (India)

2014-02-10T23:59:59.000Z

Note: This page contains sample records for the topic "microscopic double-slit experiment" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


161

Highly charged ion based time of flight emission microscope  

DOE Patents [OSTI]

A highly charged ion based time-of-flight emission microscope has been designed, which improves the surface sensitivity of static SIMS measurements because of the higher ionization probability of highly charged ions. Slow, highly charged ions are produced in an electron beam ion trap and are directed to the sample surface. The sputtered secondary ions and electrons pass through a specially designed objective lens to a microchannel plate detector. This new instrument permits high surface sensitivity (10.sup.10 atoms/cm.sup.2), high spatial resolution (100 nm), and chemical structural information due to the high molecular ion yields. The high secondary ion yield permits coincidence counting, which can be used to enhance determination of chemical and topological structure and to correlate specific molecular species.

Barnes, Alan V. (Livermore, CA); Schenkel, Thomas (San Francisco, CA); Hamza, Alex V. (Livermore, CA); Schneider, Dieter H. (Livermore, CA); Doyle, Barney (Albuquerque, NM)

2001-01-01T23:59:59.000Z

162

Dynamics of a nanodroplet under a transmission electron microscope  

SciTech Connect (OSTI)

We investigate the cyclical stick-slip motion of water nanodroplets on a hydrophilic substrate viewed with and stimulated by a transmission electron microscope. Using a continuum long wave theory, we show how the electrostatic stress imposed by non-uniform charge distribution causes a pinned convex drop to deform into a toroidal shape, with the shape characterized by the competition between the electrostatic stress and the surface tension of the drop, as well as the charge density distribution which follows a Poisson equation. A horizontal gradient in the charge density creates a lateral driving force, which when sufficiently large, overcomes the pinning induced by surface heterogeneities in the substrate disjoining pressure, causing the drop to slide on the substrate via a cyclical stick-slip motion. Our model predicts step-like dynamics in drop displacement and surface area jumps, qualitatively consistent with experimental observations.

Leong, Fong Yew, E-mail: leongfy@ihpc.a-star.edu.sg [A-STAR Institute of High Performance Computing, 1 Fusionopolis Way, Connexis, Singapore 138632 (Singapore); Mirsaidov, Utkur M. [Department of Physics, National University of Singapore, 2 Science Drive 3, Singapore 117551 (Singapore); Center for BioImaging Sciences, National University of Singapore, Science Drive 4, Singapore 117543 (Singapore); Matsudaira, Paul [Center for BioImaging Sciences, National University of Singapore, Science Drive 4, Singapore 117543 (Singapore); MechanoBiology Institute, National University of Singapore, 5A Engineering Drive 1, Singapore 117411 (Singapore); Department of Biological Sciences, National University of Singapore, 14 Science Drive 4, Singapore 117543 (Singapore); Singapore-MIT Alliance for Research and Technology Center, Science Drive 2, Singapore 117543 (Singapore); Mahadevan, L. [School of Engineering and Applied Sciences, Harvard University, Cambridge, Massachusetts 02138, USA and Department of Physics, Harvard University, Cambridge, Massachusetts 02138 (United States)

2014-01-15T23:59:59.000Z

163

Towards a quantum gas microscope for fermionic atoms .  

E-Print Network [OSTI]

??This thesis reports the achievement of a two-species apparatus for use in an upcoming experiment with fermionic ultracold atomic gases. First, we describe the construction… (more)

Ramasesh, Vinay (Vinay V.)

2012-01-01T23:59:59.000Z

164

Emplacing experience  

Science Journals Connector (OSTI)

We propose that understandings of the role of space and place in everyday life are of value to designing the environment of Role Playing Games (RPGs). We compare aspects of space and place in spatial experiences while moving through terrains in physical ... Keywords: place, space, video games

David Browning; Steven Stanley; Michael Fryer; Nicola J Bidwell

2006-12-01T23:59:59.000Z

165

Reflectance and Fluorescence Confocal Microscope for Imaging of the Mouse Colon  

E-Print Network [OSTI]

and fluorescence microscope. 20 3.3 Image Formation To form a 2D image using a point-scanning confocal microscope, the beam must be scanned in two dimensions using scanning mirrors. The PMT records a voltage signal from each point which is assigned... and fluorescence microscope. 20 3.3 Image Formation To form a 2D image using a point-scanning confocal microscope, the beam must be scanned in two dimensions using scanning mirrors. The PMT records a voltage signal from each point which is assigned...

Saldua, Meagan Alyssa

2012-02-14T23:59:59.000Z

166

E-Print Network 3.0 - analytical electron microscope Sample Search...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

two-contact electrical biasing specimen holder for electron holography and electron tomography of semiconductor devices Summary: in an electron microscope", which allows high...

167

Simple structured illumination microscope setup with high acquisition speed by using a spatial light modulator  

Science Journals Connector (OSTI)

We describe a two-beam interference structured illumination fluorescence microscope. The novelty of the presented system lies in its simplicity. A programmable spatial light modulator...

Förster, Ronny; Lu-Walther, Hui-Wen; Jost, Aurélie; Kielhorn, Martin; Wicker, Kai; Heintzmann, Rainer

2014-01-01T23:59:59.000Z

168

Development of a heating stage for an optical trapping microscope  

E-Print Network [OSTI]

The Lang Laboratory specializes in the study of biological systems through research using optical tweezers. Currently, experiments involving force and position manipulations of cellular molecules take place at room ...

Wang, Lynn (Lynn H.)

2006-01-01T23:59:59.000Z

169

Low Temperature Stage in Electron Microscope for Study on Superconductors  

Science Journals Connector (OSTI)

......superconductors. The elementary magnetic property of superconductors...of the superconducting resistance-transition must be connected...stage to be movable. 2. Electric lead wires Electric lead...experiment by measuring the resistance of the specimen by the......

Tomoyuki MIYAZAKI; Ryozo AOKI; Bunjyu SHINOZAKI; Shigeru YAMASHITA

1980-01-01T23:59:59.000Z

170

Projection Photolithography Utilizing a Schwarzschild Microscope and Self-Assembled Alkanethiol Monolayers as Simple Photoresists  

Science Journals Connector (OSTI)

A high reflectivity mirror (M3) coated for optimal reflection at 308 nm, 45° (?280?330 nm) was employed to guide the UV light into the microscope objective. ... The Schwarzschild microscope is composed of two all-reflective concentric, spherical mirrors (M1 and M2), one concave and one convex. ...

Jane M. Behm; Keith R. Lykke; Michael J. Pellin; John C. Hemminger

1996-04-17T23:59:59.000Z

171

Fast Image Drift Compensation in Scanning Electron Microscope Using Image Registration  

E-Print Network [OSTI]

Fast Image Drift Compensation in Scanning Electron Microscope Using Image Registration Naresh Marturi, Sounkalo Demb´el´e and Nadine Piat Abstract-- Scanning Electron Microscope (SEM) image ac analysis and characterization of materials to recover their structural, mechanical, electrical and optical

Boyer, Edmond

172

Microscopic theory of protein folding rates. II. Local reaction coordinates and chain dynamics  

E-Print Network [OSTI]

Microscopic theory of protein folding rates. II. Local reaction coordinates and chain dynamics John involved in barrier crossing for protein folding are investigated in terms of the chain dynamics of the polymer backbone, completing the microscopic description of protein folding presented in the preceding

Takada, Shoji

173

Preparation of Micro-grid for the Electron Microscopic Observation with High Magnification  

Science Journals Connector (OSTI)

......1958 letter LETTER Preparation of Micro-grid for the Electron Microscopic Observation...Japan L E T T E R Preparation of Micro-grid for the Electron Microscopic Observation...call this collodion net-work a micro-grid. Procedure of preparation (1......

S. Sakata

1958-01-01T23:59:59.000Z

174

Disorder vs. Order 1 Walter J Freeman Brains Create Macroscopic Order from Microscopic  

E-Print Network [OSTI]

interact with them at many levels of complexity. We are constantly bombarded with fields of energy, but only microscopic samples of them at the receptor cells. Each of our sensory ports contains an array of receptors, which are microscopic transducers that convert the kinds of incident energy for which

Freeman, Walter J.

175

Towards a Microscopic Reaction Description Based on Energy Density Functionals  

SciTech Connect (OSTI)

A microscopic calculation of reaction cross sections for nucleon-nucleus scattering has been performed by explicitly coupling the elastic channel to all particle-hole excitations in the target and one-nucleon pickup channels. The particle-hole states may be regarded as doorway states through which the flux flows to more complicated configurations, and subsequently to long-lived compound nucleus resonances. Target excitations for {sup 40,48}Ca, {sup 58}Ni, {sup 90}Zr and {sup 144}Sm were described in a random-phase framework using a Skyrme functional. Reaction cross sections obtained agree very well with experimental data and predictions of a state-of-the-art fitted optical potential. Couplings between inelastic states were found to be negligible, while the pickup channels contribute significantly. The effect of resonances from higher-order channels was assessed. Elastic angular distributions were also calculated within the same method, achieving good agreement with experimental data. For the first time observed absorptions are completely accounted for by explicit channel coupling, for incident energies between 10 and 70 MeV, with consistent angular distribution results.

Nobre, G A; DIetrich, F S; Escher, J E; Thompson, I J; Dupuis, M; Terasaki, J; Engel, J

2011-09-26T23:59:59.000Z

176

Microscopic Origin of Shear Relaxation in Strongly Coupled Yukawa Liquids  

E-Print Network [OSTI]

We report accurate molecular dynamics calculations of the shear stress relaxation in a two-dimensional strongly coupled Yukawa liquid over a wide range of the Coulomb coupling strength $\\Gamma$ and the Debye screening parameter $\\kappa$. Our data on the relaxation times of the ideal- , excess- and total shear stress auto-correlation ($\\tau^{id}_M, \\tau^{ex}_M, \\tau_M$ respectively) along with the lifetime of local atomic connectivity $\\tau_{LC}$ leads us to the following important observation. Below a certain crossover $\\Gamma_c(\\kappa)$, $\\tau_{LC} \\rightarrow \\tau^{ex}_M$, directly implying that here $\\tau_{LC}$ is the microscopic origin of the relaxation of excess shear stress unlike the case for ordinary liquids where it is the origin of the relaxation of the total shear stress. At $\\Gamma >> \\Gamma_c(\\kappa)$ i.e. in the potential energy dominated regime, $\\tau^{ex}_M\\rightarrow \\tau_M$ meaning that $\\tau^{ex}_M$ can fully account for the elastic or "solid like" behavior.

Ashwin J.; Abhijit Sen

2014-08-01T23:59:59.000Z

177

Microscopic mechanisms of graphene electrolytic delamination from metal substrates  

SciTech Connect (OSTI)

In this paper, hydrogen bubbling delamination of graphene (Gr) from copper using a strong electrolyte (KOH) water solution was performed, focusing on the effect of the KOH concentration (C{sub KOH}) on the Gr delamination rate. A factor of ?10 decrease in the time required for the complete Gr delamination from Cu cathodes with the same geometry was found increasing C{sub KOH} from ?0.05?M to ?0.60?M. After transfer of the separated Gr membranes to SiO{sub 2} substrates by a highly reproducible thermo-compression printing method, an accurate atomic force microscopy investigation of the changes in Gr morphology as a function of C{sub KOH} was performed. Supported by these analyses, a microscopic model of the delamination process has been proposed, where a key role is played by graphene wrinkles acting as nucleation sites for H{sub 2} bubbles at the cathode perimeter. With this approach, the H{sub 2} supersaturation generated at the electrode for different electrolyte concentrations was estimated and the inverse dependence of t{sub d} on C{sub KOH} was quantitatively explained. Although developed in the case of Cu, this analysis is generally valid and can be applied to describe the electrolytic delamination of graphene from several metal substrates.

Fisichella, G. [CNR-IMM, Strada VIII, 5 – 95121 Catania (Italy); Department of Electronic Engineering, University of Catania, Viale A. Doria, 6 – 95125 Catania (Italy); Di Franco, S.; Roccaforte, F.; Giannazzo, F., E-mail: filippo.giannazzo@imm.cnr.it [CNR-IMM, Strada VIII, 5 – 95121 Catania (Italy); Ravesi, S. [STMicroelectronics, Stradale Primosole, 50 – 95121 Catania (Italy)

2014-06-09T23:59:59.000Z

178

Low-energy electron microscope of novel design  

Science Journals Connector (OSTI)

We describe the design of an electron emission microscope capable of imaging a sample surface with low-energy electrons reflected from it or with UV photoelectrons. In the primary beam column provision is made to compensate the energy dispersion of the beam-separating magnet and to be able to choose different primary and secondary beam energies for Auger analysis. The secondary beam column comprises a spherical condenser sector field as energy filter. In order to avoid image aberrations caused by the two sector fields, linked imaging is provided so that intermediate surface images are formed in the deflection centers of the sector fields, while the energy selection is done at pupil positions. The emission lens is an electrostatic tetrode. The electrodes are shaped so as to accommodate an optical Schwarzschild-type mirror objective for visual in-situ observation or UV irradiation of the sample surface. A lateral resolution of about 10 nm is expected with UV photoemission microscopy and somewhat better with reflected electron microscopy.

H. Liebl; B. Senftinger

1991-01-01T23:59:59.000Z

179

Development of a circularly polarizing microscope with a polarizing undulator  

Science Journals Connector (OSTI)

A circularly polarizing microscope by which we intend to obtain images with CD (circular dichroism) or CIDS (circular intensity differential scattering) in order to observe the structure and distribution of biomolecules has been constructed by using a polarizing undulator as the polarizing light source. The polarizing undulator with crossed and retarded magnetic field having fifteen periods was installed in the electron storage ring NIJI?II in the Electrotechnical Laboratory. A Schwarzschild?type mirror system combined with a convex mirror was developed in order to focus the undulator radiation to a microbeam keeping the quality of polarization of the radiation from the undulator. The beam size was from 0.66 ?m (at wavelength 200 nm) to 0.96 ?m (at 400 nm). Using a scanning sample stage and a photomultiplier which was positioned in the back of the sample some images with transmitted and scattered light from fibrous DNA have been obtained. Attempts have also been made at obtaining images with CD and CIDS from the alternation between right? and left?handed circularly polarized radiation from the undulator.

Toru Yamada; Masatada Yuri; Hideo Onuki; Shozo Ishizaka

1995-01-01T23:59:59.000Z

180

A New Scanning Tunneling Microscope Reactor Used for High Pressure and High Temperature Catalysis Studies  

SciTech Connect (OSTI)

We present the design and performance of a home-built high-pressure and high-temperature reactor equipped with a high-resolution scanning tunneling microscope (STM) for catalytic studies. In this design, the STM body, sample, and tip are placed in a small high pressure reactor ({approx}19 cm{sup 3}) located within an ultrahigh vacuum (UHV) chamber. A sealable port on the wall of the reactor separates the high pressure environment in the reactor from the vacuum environment of the STM chamber and permits sample transfer and tip change in UHV. A combination of a sample transfer arm, wobble stick, and sample load-lock system allows fast transfer of samples and tips between the preparation chamber, high pressure reactor, and ambient environment. This STM reactor can work as a batch or flowing reactor at a pressure range of 10{sup -13} to several bars and a temperature range of 300-700 K. Experiments performed on two samples both in vacuum and in high pressure conditions demonstrate the capability of in situ investigations of heterogeneous catalysis and surface chemistry at atomic resolution at a wide pressure range from UHV to a pressure higher than 1 atm.

Tao, Feng; Tang, David C.; Salmeron, Miquel; Somorjai, Gabor A.

2008-05-12T23:59:59.000Z

Note: This page contains sample records for the topic "microscopic double-slit experiment" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


181

Microscopic determinants of the weak-form efficiency of an artificial order-driven stock market  

E-Print Network [OSTI]

Stock markets are efficient in the weak form in the sense that no significant autocorrelations can be identified in the returns. However, the microscopic mechanisms are unclear. We aim at understanding the impacts of order flows on the weak-form efficiency through computational experiments based on an empirical order-driven model. Three possible determinants embedded in the model are investigated, including the tail heaviness of relative prices of the placed orders characterized by the tail index $\\alpha_x$, the degree of long memory in relative prices quantified by its Hurst index $H_x$, and the strength of long memory in order direction depicted by $H_x$. It is found that the degree of autocorrelations in returns (quantified by its Hurst index $H_r$) is negatively correlated with $\\alpha_x$ and $H_x$ and positively correlated with $H_s$. In addition, the values of $\\alpha_x$ and $H_x$ have negligible impacts on $H_r$, whereas $H_s$ exhibits a dominating impact on $H_r$. Our results suggest that stock market...

Zhou, Jian; Jiang, Zhi-Qiang; Xiong, Xiong; Zhang, Wei; Zhou, Wei-Xing

2014-01-01T23:59:59.000Z

182

MIAMI: Microscope and ion accelerator for materials investigations  

SciTech Connect (OSTI)

A transmission electron microscope (TEM) with in situ ion irradiation has been built at the University of Salford, U.K. The system consists of a Colutron G-2 ion source connected to a JEOL JEM-2000FX TEM via an in-house designed and constructed ion beam transport system. The ion source can deliver ion energies from 0.5 to 10 keV for singly charged ions and can be floated up to 100 kV to allow acceleration to higher energies. Ion species from H to Xe can be produced for the full range of energies allowing the investigation of implantation with light ions such as helium as well as the effects of displacing irradiation with heavy inert or self-ions. The ability to implant light ions at energies low enough such that they come to rest within the thickness of a TEM sample and to also irradiate with heavier species at energies sufficient to cause large numbers of atomic displacements makes this facility ideally suited to the study of materials for use in nuclear environments. TEM allows the internal microstructure of a sample to be imaged at the nanoscale. By irradiating in situ it is possible to observe the dynamic evolution of radiation damage which can occur during irradiation as a result of competing processes within the system being studied. Furthermore, experimental variables such as temperature can be controlled and maintained throughout both irradiation and observation. This combination of capabilities enables an understanding of the underlying atomistic processes to be gained and thus gives invaluable insights into the fundamental physics governing the response of materials to irradiation. Details of the design and specifications of the MIAMI facility are given along with examples of initial experimental results in silicon and silicon carbide.

Hinks, J. A.; Berg, J. A. van den; Donnelly, S. E. [Centre for Materials and Physics, University of Salford, The Crescent, Salford, Greater Manchester M5 4WT (United Kingdom)

2011-03-15T23:59:59.000Z

183

A metrological large range atomic force microscope with improved performance  

Science Journals Connector (OSTI)

A metrological large range atomic force microscope (Met. LR-AFM) has been set up and improved over the past years at Physikalisch-Technische Bundesanstalt (PTB). Being designed as a scanning sample type instrument the sample is moved in three dimensions by a mechanical ball bearing stage in combination with a compact z -piezostage. Its topography is detected by a position-stationary AFM head. The sample displacement is measured by three embedded miniature homodyneinterferometers in the x y and z directions. The AFM head is aligned in such a way that its cantilever tip is positioned on the sample surface at the intersection point of the three interferometer measurement beams for satisfying the Abbe measurement principle. In this paper further improvements of the Met. LR-AFM are reported. A new AFM head using the beam deflection principle has been developed to reduce the influence of parasitic optical interference phenomena. Furthermore an off-line Heydemann correction method has been applied to reduce the inherent interferometer nonlinearities to less than 0.3 nm ( p - v ) . Versatile scanning functions for example radial scanning or local AFM measurement functions have been implemented to optimize the measurement process. The measurement software is also improved and allows comfortable operations of the instrument via graphical user interface or script-based command sets. The improved Met. LR-AFM is capable of measuring for instance the step height lateral pitch line width nanoroughness and other geometrical parameters of nanostructures.Calibration results of a one-dimensional grating and a set of film thickness standards are demonstrated showing the excellent metrological performance of the instrument.

Gaoliang Dai; Helmut Wolff; Frank Pohlenz; Hans-Ulrich Danzebrink

2009-01-01T23:59:59.000Z

184

1/27/2014 Microscopic Wind Turbines Offer Renewable Energyon the Go http://oilprice.com/Latest-Energy-News/World-News/Microscopic-Wind-Turbines-Offer-Renewable-Energy-on-the-Go.html 1/3  

E-Print Network [OSTI]

1/27/2014 Microscopic Wind Turbines Offer Renewable Energyon the Go http://oilprice.com/Latest-Energy-News/World-News/Microscopic-Wind-Turbines-Offer-Renewable-Energy-on-the-Go.html 1/3 Log In Sign Up Advertising Contact Us About Contributors Write for Us Forum Home Microscopic Wind Turbines Offer Renewable

Chiao, Jung-Chih

185

Demonstration of achromatic cold-neutron microscope utilizing axisymmetric focusing mirrors  

SciTech Connect (OSTI)

An achromatic cold-neutron microscope with magnification 4 is demonstrated. The image-forming optics is composed of nested coaxial mirrors of full figures of revolution, so-called Wolter optics. The spatial resolution, field of view, and depth of focus are measured and found consistent with ray-tracing simulations. Methods of increasing the resolution and magnification are discussed, as well as the scientific case for the neutron microscope. In contrast to traditional pinhole-camera neutron imaging, the resolution of the microscope is determined by the mirrors rather than by the collimation of the beam, leading to possible dramatic improvements in the signal rate and resolution.

Liu, D.; Khaykovich, B. [Nuclear Reactor Laboratory, Massachusetts Institute of Technology, 138 Albany St., Cambridge, Massachusetts 02139 (United States)] [Nuclear Reactor Laboratory, Massachusetts Institute of Technology, 138 Albany St., Cambridge, Massachusetts 02139 (United States); Hussey, D.; Jacobson, D.; Arif, M. [Physical Measurement Laboratory, NIST, Gaithersburg, Maryland 20899-8461 (United States)] [Physical Measurement Laboratory, NIST, Gaithersburg, Maryland 20899-8461 (United States); Gubarev, M. V.; Ramsey, B. D. [Marshall Space Flight Center, NASA, VP62, Huntsville, Alabama 35812 (United States)] [Marshall Space Flight Center, NASA, VP62, Huntsville, Alabama 35812 (United States); Moncton, D. E. [Nuclear Reactor Laboratory, Massachusetts Institute of Technology, 138 Albany St., Cambridge, Massachusetts 02139 (United States) [Nuclear Reactor Laboratory, Massachusetts Institute of Technology, 138 Albany St., Cambridge, Massachusetts 02139 (United States); Department of Physics, Massachusetts Institute of Technology, 77 Massachusetts Ave., Cambridge, Massachusetts 02139 (United States)

2013-05-06T23:59:59.000Z

186

Status of MICROSCOPE, a mission to test the Equivalence Principle in space  

E-Print Network [OSTI]

MICROSCOPE is a French Space Agency mission that aims to test the Weak Equivalence Principle in space down to an accuracy of $10^{-15}$. This is two orders of magnitude better than the current constraints, which will allow us to test General Relativity as well as theories beyond General Relativity which predict a possible Weak Equivalence Principle violation below $10^{-13}$. In this communication, we describe the MICROSCOPE mission, its measurement principle and instrument, and we give an update on its status. After a successful instrument's commissioning, MICROSCOPE is on track for on-schedule launch, expected in 2016.

Bergé, Joel; Rodrigues, Manuel

2015-01-01T23:59:59.000Z

187

ELECTRON MICROSCOPE STUDIES OF THE MECHANISM OF NUCLEATION AND GROWTH OF Cu Au II FROM THE DISORDERED STATE  

E-Print Network [OSTI]

846. ELECTRON MICROSCOPE STUDIES OF THE MECHANISM OF NUCLEATION AND GROWTH OF Cu Au II FROM the electron microscope. The alloy is disordered by annealing at 450 °C, and the nucleation and growth with the electron microscope by Ogawa and al. [1], and subsequently by Pashley and co-workers [2], [3], [4

Boyer, Edmond

188

Geek-Up[6.3.2011]: Inked PV, Diagnostic Tools and Tough Microscopes |  

Broader source: Energy.gov (indexed) [DOE]

3.2011]: Inked PV, Diagnostic Tools and Tough Microscopes 3.2011]: Inked PV, Diagnostic Tools and Tough Microscopes Geek-Up[6.3.2011]: Inked PV, Diagnostic Tools and Tough Microscopes June 3, 2011 - 2:04pm Addthis Novartis Diagnostics scientist Cleo Salisbury and Biological Nanostructures Facility director Ron Zuckermann discuss their collaboration to discover new therapies for Alzheimer's. Niketa Kumar Niketa Kumar Public Affairs Specialist, Office of Public Affairs What does this mean for me? Researchers have developed new inorganic nanocrystal arrays created by spraying a new type of colloidal "ink." Scientists have engineered a technique to help doctors identify Alzheimer's in its early stages and discover new therapies for this disease. Scientists have developed a new type of atomic force microscope that

189

The mechanical design of a proton microscope for radiography at 800 MeV  

SciTech Connect (OSTI)

A proton microscope has been developed for radiography applications using the 800-MeV linear accelerator at the Los Alamos Neutron Science Center (LANSCE). The microscope provides a magnified image of a static device, or of a dynamic event such as a high-speed projectile impacting a target. The microscope assembly consists primarily of four Permanent Magnet Quadrupoles (PMQ's) that are supported on movable platforms. The platform supports, along with the rest of the support structure, are designed to withstand the residual dynamic loads that are expected from the dynamic tests. This paper covers the mechanical design of the microscope assembly, including the remote positioning system that allows for fine-tuning the focus of an object being imaged.

Valdiviez, R. (Robert); Sigler, F. E. (Floyd E.); Barlow, D. B. (David B.); Blind, B. (Barbara); Jason, A. J. (Andrew J.); Mottershead, C. T.; Gomez, J. J. (John J.); Espinoza, C. J. (Camilo J.)

2003-01-01T23:59:59.000Z

190

Microscopic description of isoscalar giant resonance excitations in ??Ca and ¹¹?SN nuclei  

E-Print Network [OSTI]

This thesis presents a microscopic description of isoscalar giant resonance excitations in ??Ca and ¹¹? Sn nuclei within the self-consistent Skyrme-Hartree-Fock-Random-Phase-Approximation (HF-RPA) theory. Such characteristic features...

Karki, Bhishma

2000-01-01T23:59:59.000Z

191

Demonstration of achromatic cold-neutron microscope utilizing axisymmetric focusing mirrors  

E-Print Network [OSTI]

An achromatic cold-neutron microscope with magnification 4 is demonstrated. The image-forming optics is composed of nested coaxial mirrors of full figures of revolution, so-called Wolter optics. The spatial resolution, ...

Liu, Dazhi

192

Isospin-dependent relativistic microscopic optical potential in the Dirac Brueckner-Hartree-Fock method  

Science Journals Connector (OSTI)

The relativistic microscopic optical potential in the asymmetric nuclear matter is studied in the framework of the Dirac Brueckner-Hartree-Fock method. A new decomposition of...E>0 in nuclear matter is calculated...

Jian Rong; Zhongyu Ma

2004-03-01T23:59:59.000Z

193

Background, status and future of the Transmission Electron Aberration-corrected Microscope project  

Science Journals Connector (OSTI)

...Microscope project Recent advances in aberration-correcting...DOEs) Office of Science to jointly design...great interest for aerospace and cryogenic applications...be possible to advance to a new level...heart of materials science. At this level...

2009-01-01T23:59:59.000Z

194

AUTOMATED DETERMINATION OF PROTEIN SUBCELLULAR LOCATIONS FROM 3D FLUORESCENCE MICROSCOPE IMAGES  

E-Print Network [OSTI]

features (termed SLF for Subcellular Location Features) computed from 2D fluorescence microscope images [4]. We have shown the SLF to accurately represent the complexity in such images by using them

Gordon, Geoffrey J.

195

Attainable Resolution of Energy-Selecting Image Using High-Voltage Electron Microscope  

Science Journals Connector (OSTI)

......mapping using an imaging energy filter: Image formation...elemental mapping In an energy filtering transmission...Egerton RF: Electron energy-loss spectroscopy In the electron microscope. New York and London: Plenum Press......

Hiroki Kurata; Sakumi Moriguchi; Seiji Isoda; Takashi Kobayashi

1996-02-01T23:59:59.000Z

196

Optimal Design of Multilayer Mirrors for Water-Window Microscope Optics  

Science Journals Connector (OSTI)

A small bandwidth of periodic multilayers at wavelengths 2.4–4.4 nm presents problems for the spectral matching of mirrors. This leads to low throughput of a Schwarzschild microscope and its sensitivity to techno...

Yurii Uspenskii; Denis Burenkov; Tadashi Hatano; Masaki Yamamoto

197

Simultaneous calibration of a microscopic traffic simulation model and OD matrix  

E-Print Network [OSTI]

With the recent widespread deployment of intelligent transportation systems (ITS) in North America there is an abundance of data on traffic systems and thus an opportunity to use these data in the calibration of microscopic traffic simulation models...

Kim, Seung-Jun

2006-10-30T23:59:59.000Z

198

Low energy ($p,?$) reactions in Ni and Cu nuclei using microscopic optical model  

E-Print Network [OSTI]

Radiative capture reactions for low energy protons have been theoretically studied for Ni and Cu isotopes using the microscopic optical model. The optical potential has been obtained in the folding model using different microscopic interactions with the nuclear densities from Relativistic Mean Field calculations. The calculated total cross sections as well as the cross sections for individually low lying levels have been compared with measurements involving stable nuclear targets. Rates for the rapid proton capture process have been evaluated for astrophysically important reactions.

G. Gangopadhyay

2010-08-05T23:59:59.000Z

199

Application of Microscopic Simulation to Evaluate the Safety Performance of Freeway Weaving Sections  

E-Print Network [OSTI]

APPLICATION OF MICROSCOPIC SIMULATION TO EVALUATE THE SAFETY PERFORMANCE OF FREEWAY WEAVING SECTIONS A Thesis by THANH QUANG LE Submitted to the Office of Graduate Studies of Texas A&M University in partial fulfillment... of the requirements for the degree of MASTER OF SCIENCE December 2009 Major Subject: Civil Engineering APPLICATION OF MICROSCOPIC SIMULATION TO EVALUATE THE SAFETY PERFORMANCE OF FREEWAY WEAVING SECTIONS A Thesis by THANH QUANG LE...

Le, Thanh Quang

2011-02-22T23:59:59.000Z

200

A Josephson Junction Microscope for Low-frequency Fluctuators  

E-Print Network [OSTI]

The high-Q harmonic oscillator mode of a Josephson junction can be used as a novel probe of spurious two-level systems (TLSs) inside the amorphous oxide tunnel barriers of the junction. In particular, we show that spectroscopic transmission measurements of the junction resonator mode can reveal how the coupling magnitude between the junction and the TLSs varies with an external magnetic field applied in the plane of the tunnel barrier. The proposed experiments offer the possibility of clearly resolving the underlying coupling mechanism for these spurious TLSs, an important decoherence source limiting the quality of superconducting quantum devices.

L. Tian; R. W. Simmonds

2007-05-10T23:59:59.000Z

Note: This page contains sample records for the topic "microscopic double-slit experiment" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


201

A microscopic view of accelerated dynamics in deformed polymer glasses  

E-Print Network [OSTI]

A molecular level analysis of segmental trajectories obtained from molecular dynamics simulations is used to obtain the full relaxation time spectrum in aging polymer glasses subject to three different deformation protocols. As in experiments, dynamics can be accelerated by several orders of magnitude, and a narrowing of the distribution of relaxation times during creep is directly observed. Additionally, the acceleration factor describing the transformation of the relaxation time distributions is computed and found to obey a universal dependence on the global strain, independent of age and deformation protocol.

Mya Warren; Joerg Rottler

2010-02-09T23:59:59.000Z

202

NCEM National Center for Electron Microscopy: Microscopes and Facilities:  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

3010 In-Situ 3010 In-Situ AEME The 300 kV JEOL 3010 offers greater specimen penetration than 200kV instruments, with significantly improved spatial resolution and probe forming capabilities. The side-entry stage allows ±45° tilt and can be operated with piezo-drift compensation. A flexible condenser system permits CBED, LACBED, and imaging with hollow cone and Koehler illumination. In addition to a standard film camera, a Gatan Orius CCD, and a Gatan 622 intensified TV camera and VCR are available for recording experiments at video rates. Specific capabilities include: high-resolution imaging at 2.1Å and ±40° tilt during simultaneous heating; very-high-resolution imaging at 1.7 Å and ±10° tilt during simultaneous heating; and high magnification Lorentz and Foucault imaging of magnetic samples. Various

203

Microscopic analysis of irradiated AGR-1 coated particle fuel compacts  

SciTech Connect (OSTI)

The AGR-1 experiment involved irradiation of 72 TRISO-coated particle fuel compacts to a peak compact-average burnup of 19.5% FIMA with no in-pile failures observed out of 3 x 105 total particles. Irradiated AGR-1 fuel compacts have been cross-sectioned and analyzed with optical microscopy to characterize kernel, buffer, and coating behavior. Six compacts have been examined, spanning a range of irradiation conditions (burnup, fast fluence, and irradiation temperature) and including all four TRISO coating variations irradiated in the AGR-1 experiment. The cylindrical specimens were sectioned both transversely and longitudinally, then polished to expose from 36 to 79 individual particles near midplane on each mount. The analysis focused primarily on kernel swelling and porosity, buffer densification and fracturing, buffer–IPyC debonding, and fractures in the IPyC and SiC layers. Characteristic morphologies have been identified, 981 particles have been classified, and spatial distributions of particle types have been mapped. No significant spatial patterns were discovered in these cross sections. However, some trends were found between morphological types and certain behavioral aspects. Buffer fractures were found in 23% of the particles, and these fractures often resulted in unconstrained kernel protrusion into the open cavities. Fractured buffers and buffers that stayed bonded to IPyC layers appear related to larger pore size in kernels. Buffer–IPyC interface integrity evidently factored into initiation of rare IPyC fractures. Fractures through part of the SiC layer were found in only four classified particles, all in conjunction with IPyC–SiC debonding. Compiled results suggest that the deliberate coating fabrication variations influenced the frequencies of IPyC fractures and IPyC–SiC debonds.

Scott A. Ploger; Paul A. Demkowicz; John D. Hunn; Jay S. Kehn

2014-05-01T23:59:59.000Z

204

Design and analysis of multilayer X ray/XUV microscope. Final Report, 1 May 1989 - 31 Jan. 1990  

SciTech Connect (OSTI)

The design and analysis of a large number of normal incidence multilayer x ray microscopes based on the spherical mirror Schwarzschild configuration is examined. Design equations for the spherical mirror Schwarzschild microscopes are summarized and used to evaluate mirror parameters for microscopes with magnifications ranging from 2 to 50x. Ray tracing and diffraction analyses are carried out for many microscope configurations to determine image resolution as a function of system parameters. The results are summarized in three publication included herein. A preliminary study of advanced reflecting microscope configurations, where aspherics are used in place of the spherical microscope mirror elements, has indicated that the aspherical elements will improve off-axis image resolution and increase the effective field of view.

Shealy, D.L.

1990-04-01T23:59:59.000Z

205

Detection and measurement of electroreflectance on quantum cascade laser device using Fourier transform infrared microscope  

SciTech Connect (OSTI)

We demonstrate the use of a Fourier Transform Infrared microscope system to detect and measure electroreflectance (ER) from mid-infrared quantum cascade laser (QCL) device. To characterize intersubband transition (ISBT) energies in a functioning QCL device, a microscope is used to focus the probe on the QCL cleaved mirror. The measured ER spectra exhibit resonance features associated to ISBTs under applied electric field in agreement with the numerical calculations and comparable to observed photocurrent, and emission peaks. The method demonstrates the potential as a characterization tool for QCL devices.

Enobio, Eli Christopher I.; Ohtani, Keita; Ohno, Yuzo; Ohno, Hideo, E-mail: ohno@riec.tohoku.ac.jp [Laboratory for Nanoelectronics and Spintronics, Research Institute of Electrical Communication, Tohoku University, 2-1-1 Katahira, Aoba-ku, Sendai 980-8577 (Japan)] [Laboratory for Nanoelectronics and Spintronics, Research Institute of Electrical Communication, Tohoku University, 2-1-1 Katahira, Aoba-ku, Sendai 980-8577 (Japan)

2013-12-02T23:59:59.000Z

206

1 Microscopic and environmental controls on the spacing and thickness of segregated 2 ice lenses  

E-Print Network [OSTI]

water, and ice conspire with the prevailing environmental conditions 52 to produce macroscopic ice by Henry (2000). The first comprehensive and tractable model 57 for ice lens growth was produced by O1 Microscopic and environmental controls on the spacing and thickness of segregated 2 ice lenses 3

Rempel, Alan W.

207

EST-CE QU'ON VOlT ATRAVERS UN MICROSCOPE? '  

E-Print Network [OSTI]

speculations philosophiques. *Ian Hacking, «Do we see through a microscope?», P~cifi: Ph~loso phical Quarterly. Texte de Ian Hacking extrait de : Philosophie des sciences - Tome 2 : Naturalismes et réalismes Dirigé par Sandra Laugier , Pierre Wagner Ed. Vrin, Paris #12;240 IAN HACKING LA GRANDE CHAiNE DES ETRES Le

Aubin, David

208

Towards 0.1 nm resolution with the first spherically corrected transmission electron microscope  

Science Journals Connector (OSTI)

......defocus-modulation image processing. Ultramiaysco/y'41: 323-333. means of an appropriate monochromator. 24 Thust A, Overwijk M H, Coene W M J, and Lentzen M (1996) M. Haider et al. Corrected electron microscope 405 Numerical correction of lenaberrations......

Maximilian Haider; Herald Rose; Stephan Uhlemann; Bernd Kabius; Knut Urban

1998-01-01T23:59:59.000Z

209

NUCLEAR SEGMENTATION IN MICROSCOPE CELL IMAGES: A HAND-SEGMENTED DATASET AND COMPARISON OF ALGORITHMS  

E-Print Network [OSTI]

NUCLEAR SEGMENTATION IN MICROSCOPE CELL IMAGES: A HAND-SEGMENTED DATASET AND COMPARISON. The hand-labeled dataset (and all software used to com- pare methods) is publicly available to enable, Image seg- mentation 1. INTRODUCTION Nuclear segmentation is an important step in the pipeline of many

Gordon, Geoffrey J.

210

Electric-Field Control of Magnetism Intrinsic magnetoelectric coupling describes the microscopic interaction between magnetic and  

E-Print Network [OSTI]

Electric-Field Control of Magnetism Intrinsic magnetoelectric coupling describes the microscopic interaction between magnetic and electric polarization in a single-phase material. The control of the magnetic state of a material with an electric field is an enticing prospect for device engineering. MRSEC

Maroncelli, Mark

211

Atomic force microscope with combined FTIR-Raman spectroscopy having a micro thermal analyzer  

DOE Patents [OSTI]

An atomic force microscope is provided that includes a micro thermal analyzer with a tip. The micro thermal analyzer is configured for obtaining topographical data from a sample. A raman spectrometer is included and is configured for use in obtaining chemical data from the sample.

Fink, Samuel D. (Aiken, SC); Fondeur, Fernando F. (North Augusta, SC)

2011-10-18T23:59:59.000Z

212

materials analysis of inorganic, organic, and bioma-terials. See ELECTRON MICROSCOPE.  

E-Print Network [OSTI]

28 Plaster materials analysis of inorganic, organic, and bioma- terials. See ELECTRON MICROSCOPE: The next chip-scale technology, Mater. Today, 9:20­27, 2006. Plaster A plastic mixture of solids and water plaster is also used in the industry to designate plaster of paris. Plaster is usually applied in one

Anderson, Peter M.

213

Microscopic optical potentials of the nucleon-nucleus elastic scattering at medium energies  

E-Print Network [OSTI]

Microscopic optical potentials of the nucleon-nucleus elastic scattering at medium energies R interpreted in terms of the phenomenological optical model potential [1]. At medium and high energies of the optical model approach at medium energies has also some theoretical founda- tions. At a sufficiently large

Paris-Sud XI, Université de

214

Low resistivity of Pt silicide nanowires measured using double-scanning-probe tunneling microscope  

E-Print Network [OSTI]

experimentally shown to be conductive.8­10 However, RE metal silicide NWs are easily oxidized, so that inert NWs similarly to RE metal silicide NWs.11 It is essential to study the electrical properties, especiallyLow resistivity of Pt silicide nanowires measured using double-scanning- probe tunneling microscope

Kim, Sehun

215

Quantifying transient states in materials with the dynamic transmission electron microscope  

Science Journals Connector (OSTI)

......Engineering and Materials Science and Department...interest to the materials scientist. It has...Computer-controlled, active-feedback pointing...at the microscope cathode. The cathode is...specimen and the cathode laser fires at a...comparison to models of materials evolution. Image......

Geoffrey H. Campbell; Thomas LaGrange; Judy S. Kim; Bryan W. Reed; Nigel D. Browning

2010-08-01T23:59:59.000Z

216

Development of a new 3 MV ultra-high voltage electron microscope at Osaka University  

Science Journals Connector (OSTI)

......shown in Fig. 3 and the main specifications are summarized in Table 1...CW-rircuits at 3MV Main specifications of 3MV electron microscope...stage XI38 stages (at 3MV) InsuLation gas : SFft (4 atoms) Illuminating...This helps to minimize thermal drift of the specimen during......

Akio Takaoka; Katsumi Ura; Hirotaro Mori; Teiji Katsuta; Isao Matsui; Soichiro Hayashi

1997-01-01T23:59:59.000Z

217

IMAGE CONTENT-BASED RETRIEVAL AND AUTOMATED INTERPRETATION OF FLUORESCENCE MICROSCOPE IMAGES VIA THE  

E-Print Network [OSTI]

to microscope images. Our group has developed sets of Subcellular Location Features (SLF) and demonstrated. More significantly, we demonstrate that the use of the SLF can provide automated interpretation-vocabulary means for entering the annotations and also triggers calculation of the SLF features for each cell

Gordon, Geoffrey J.

218

Microcalorimeter-type energy dispersive X-ray spectrometer for a transmission electron microscope  

Science Journals Connector (OSTI)

......Microscopy (1986) New York: Plenum Press. 4...Garratt-Reed A J , Bell D C. Energy-Dispersive X-ray...Microscopy (1996) New York: Plenum Press. 19...Microcalorimeter-type energy dispersive X-ray...electron microscope. | A new energy dispersive......

Toru Hara; Keiichi Tanaka; Keisuke Maehata; Kazuhisa Mitsuda; Noriko Y. Yamasaki; Mitsuaki Ohsaki; Katsuaki Watanabe; Xiuzhen Yu; Takuji Ito; Yoshihiro Yamanaka

2010-02-01T23:59:59.000Z

219

Characterization of grain boundary conductivity of spin-sprayed ferrites using scanning microwave microscope  

SciTech Connect (OSTI)

Grain boundary electrical conductivity of ferrite materials has been characterized using scanning microwave microscope. Structural, electrical, and magnetic properties of Fe{sub 3}O{sub 4} spin-sprayed thin films onto glass substrates for different length of growth times were investigated using a scanning microwave microscope, an atomic force microscope, a four-point probe measurement, and a made in house transmission line based magnetic permeameter. The real part of the magnetic permeability shows almost constant between 10 and 300?MHz. As the Fe{sub 3}O{sub 4} film thickness increases, the grain size becomes larger, leading to a higher DC conductivity. However, the loss in the Fe{sub 3}O{sub 4} films at high frequency does not increase correspondingly. By measuring the reflection coefficient s{sub 11} from the scanning microwave microscope, it turns out that the grain boundaries of the Fe{sub 3}O{sub 4} films exhibit higher electric conductivity than the grains, which contributes loss at radio frequencies. This result will provide guidance for further improvement of low loss ferrite materials for high frequency applications.

Myers, J.; Nicodemus, T.; Zhuang, Y., E-mail: yan.zhuang@wright.edu [Department of Electrical Engineering, Wright State University, Dayton, Ohio 45435 (United States); Watanabe, T.; Matsushita, N. [Materials and Structures Laboratory, Tokyo Institute of Technology, Yokohama (Japan); Yamaguchi, M. [Department of Electrical Engineering, Tohoku University, Sendai 980-8579 (Japan)

2014-05-07T23:59:59.000Z

220

Performance Evaluation of Adaptive Ramp-Metering Algorithms Using Microscopic Traffic Simulation Model  

E-Print Network [OSTI]

to implementation on the target freeway network. In this paper, a capability-enhanced PARAMICS simulation model has evaluation; Simulation models; Algorithms. Introduction Ramp metering has been recognized as an effectivePerformance Evaluation of Adaptive Ramp-Metering Algorithms Using Microscopic Traffic Simulation

Levinson, David M.

Note: This page contains sample records for the topic "microscopic double-slit experiment" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


221

OIL IN THE OPEN WATER microscopic plants and animals that form the  

E-Print Network [OSTI]

OIL IN THE OPEN WATER microscopic plants and animals that form the basis of the oceanic food web the surface, corals and other deepwater OIL AND HUMAN USE Wellhead CORALS · Coral surveys · Tissue collections · Transect surveys to detect submerged oil · Oil plume modeling · Sediment sampling AQUATIC VEGETATION

222

Microscopic models of quasicrystals J. Jdrzejewski and J. Mikisz, Devil's staircase for nonconvex interactions,  

E-Print Network [OSTI]

Microscopic models of quasicrystals J. Jdrzejewski and J. Mikisz, Devil's staircase for nonconvex-dimensional infinite-range lattice-gas interactions, molecules consisting of two particles form a molecular devil's staircase in the unique ground- state measure. The structure of the ground set is that of a Cantor set

Miekisz, Jacek

223

Plastic behavior of fcc metals over a wide range of strain: Macroscopic and microscopic descriptions and their relationship  

E-Print Network [OSTI]

Plastic behavior of fcc metals over a wide range of strain: Macroscopic and microscopic The room temperature macroscopic and microscopic plastic behavior of four face-centered cubic metals (Al dislocations during plastic flow. It is shown that forest dislocations develop primarily due to interaction

Gubicza, Jenõ

224

Reflecting Microscopes  

Science Journals Connector (OSTI)

... at the Physical Society's Exhibition in 1939. I used non-spherical mirror-pairs, Schwarzschild aplanats2,3, for a reason which may prove important if it is desired to ... above 0*2, and should preferably be lower.

C. R. BURCH

1943-12-25T23:59:59.000Z

225

Spectro-microscopic Measurements of Carbonaceous Aerosol Aging in Central California  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Spectro-microscopic Measurements of Carbonaceous Spectro-microscopic Measurements of Carbonaceous Aerosol Aging in Central California For original submission and image(s), see ARM Research Highlights http://www.arm.gov/science/highlights/ Research Highlight Atmospheric aerosols affect climate by scattering and absorbing sunlight and by modifying the properties of clouds. However, there are gaps in our understanding of chemical processes involving these airborne particulates, and these gaps contribute significantly to uncertainties in predicting future climate change. Developing more- accurate global climate models requires a more complete understanding of the aerosol lifecycle, from initial particle formation to loss through incorporation into precipitating clouds or dry deposition. In research published in the journal Atmospheric Chemistry and Physics, a team of

226

Seminar Announcement Nanoscale High Field Chemistry with the Atomic Force Microscope and Patterning January 15, 2009  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

SEMINAR SEMINAR ANNOUNCMENT Thursday, January 15, 2009 11:00am - 12:00 noon EMSL Boardroom Nanoscale High Field Chemistry With the Atomic Force Microscope and Patterning Marco Rolandi Assistant Professor Department of Materials Science and Engineering, University of Washington, Seattle, WA 98195 Facile and affordable processes for the fabrication of nanostructures are fundamental to future endeavors in nanoscale science and engineering. The atomic force microscope was designed primarily for imaging, and has evolved into a versatile tool for nanoscale surface modification. We have developed an AFM based scheme capable of direct writing of glassy carbon nanowires as fast as 1 cm/s. In brief, when a bias is applied across the tip-sample gap a molecular precursor undergoes high field reactions that result in the deposition of a cross- linked product on the surface. In order to gain a

227

Imaging the p-n junction in a gallium nitride nanowire with a scanning microwave microscope  

SciTech Connect (OSTI)

We used a broadband, atomic-force-microscope-based, scanning microwave microscope (SMM) to probe the axial dependence of the charge depletion in a p-n junction within a gallium nitride nanowire (NW). SMM enables the visualization of the p-n junction location without the need to make patterned electrical contacts to the NW. Spatially resolved measurements of S{sub 11}{sup ?}, which is the derivative of the RF reflection coefficient S{sub 11} with respect to voltage, varied strongly when probing axially along the NW and across the p-n junction. The axial variation in S{sub 11}{sup ?}? effectively mapped the asymmetric depletion arising from the doping concentrations on either side of the junction. Furthermore, variation of the probe tip voltage altered the apparent extent of features associated with the p-n junction in S{sub 11}{sup ?} images.

Imtiaz, Atif [Physical Measurement Laboratory, National Institute of Standards and Technology, Boulder, Colorado 80305 (United States); Department of Electrical, Computer, and Energy Engineering, University of Colorado, Boulder, Colorado 80309 (United States); Wallis, Thomas M.; Brubaker, Matt D.; Blanchard, Paul T.; Bertness, Kris A.; Sanford, Norman A.; Kabos, Pavel, E-mail: kabos@boulder.nist.gov [Physical Measurement Laboratory, National Institute of Standards and Technology, Boulder, Colorado 80305 (United States); Weber, Joel C. [Physical Measurement Laboratory, National Institute of Standards and Technology, Boulder, Colorado 80305 (United States); Department of Mechanical Engineering, University of Colorado, Boulder, Colorado 80309 (United States); Coakley, Kevin J. [Information Technology Laboratory, National Institute of Standards and Technology, Boulder, Colorado 80305 (United States)

2014-06-30T23:59:59.000Z

228

Design of a scanning Josephson junction microscope for submicron-resolution magnetic imaging  

SciTech Connect (OSTI)

We describe a magnetic field scanning instrument designed to extend the spatial resolution of scanning superconducting quantum interference device microscopy into the submicron regime. This instrument, the scanning Josephson junction microscope, scans a single Josephson junction across the surface of a sample, detecting the local magnetic field by the modulation of the junction critical current. By using a submicron junction and a scanning tunneling microscope feedback system to maintain close proximity to the surface, magnetic field sensitivity of 10 {mu}G with a spatial resolution of 0.3 {mu}m should be attainable, opening up new opportunities for imaging vortex configurations and core structure in superconductors and magnetic domains in magnetic materials. {copyright} {ital 1999 American Institute of Physics.}

Plourde, B.L.; Van Harlingen, D.J. [Department of Physics, Science and Technology Center for Superconductivity, and Materials Research Laboratory, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801 (United States)] [Department of Physics, Science and Technology Center for Superconductivity, and Materials Research Laboratory, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801 (United States)

1999-11-01T23:59:59.000Z

229

Development of x-ray laminography under an x-ray microscopic condition  

SciTech Connect (OSTI)

An x-ray laminography system under an x-ray microscopic condition was developed to obtain a three-dimensional structure of laterally-extended planar objects which were difficult to observe by x-ray tomography. An x-ray laminography technique was introduced to an x-ray transmission microscope with zone plate optics. Three prototype sample holders were evaluated for x-ray imaging laminography. Layered copper grid sheets were imaged as a laminated sample. Diatomite powder on a silicon nitride membrane was measured to confirm the applicability of this method to non-planar micro-specimens placed on the membrane. The three-dimensional information of diatom shells on the membrane was obtained at a spatial resolution of sub-micron. Images of biological cells on the membrane were also obtained by using a Zernike phase contrast technique.

Hoshino, Masato; Uesugi, Kentaro; Takeuchi, Akihisa; Suzuki, Yoshio; Yagi, Naoto [Japan Synchrotron Radiation Research Institute JASRI/SPring-8, 1-1-1 Kouto, Sayo, Hyogo 679-5198 (Japan)

2011-07-15T23:59:59.000Z

230

Microscopic Scatterer Displacements Generate the 1f Resistance Noise of H in Pd  

Science Journals Connector (OSTI)

The resistance changes generated by individual microscopic displacements due to dissolved hydrogen ions hopping between neighboring sites within palladium films create intense 1f noise at low temperature. Crossover to one-dimensional diffusion-mediated number-fluctuation noise occurs for T?150 K. The measured resistance change per proton displacement is comparable to the resistance per proton as predicted by applicable quantum-interference theories.

Neil M. Zimmerman and Watt W. Webb

1988-08-15T23:59:59.000Z

231

Direct Visualization and Identification of Biofunctionalized Nanoparticles using a Magnetic Atomic Force Microscope  

Science Journals Connector (OSTI)

Because of its outstanding ability to image and manipulate single molecules, atomic force microscopy (AFM) established itself as a fundamental technique in nanobiotechnology. ... force microscope (AFM) has emerged as a powerful tool for exploring the forces and the dynamics of the interaction between individual ligands and receptors, either on isolated mols. ... In CRC Handbook of Chemistry and Physics, 90thed.; Lide, D. R., Eds.; CRC Press Inc.: Boca Raton, FL, 2010; pp 4-142– 4-147. ...

Stephan Block; Gunnar Glo?ckl; Werner Weitschies; Christiane A. Helm

2011-08-05T23:59:59.000Z

232

COR Summary of Experience  

Broader source: Energy.gov (indexed) [DOE]

COR SUMMARY OF EXPERIENCE COR SUMMARY OF EXPERIENCE Effective January 1, 2012 CORs who are applying for certification must demonstrate past contracting, acquisition, procurement, program/project management, and general business experience. This experience is based on a set of competencies. Some of the competencies are listed below to use as a reference when you are documenting your previous experience. Use this template to document your experience. Experience should be supported by a written confirmation from the cognizant Contracting Officer/Contract Specialist showing the contract number, title and date(s) to which the experience applied. Once you have completed this document, please forward it and its supporting statement(s) to your Site Acquisition Career Manager (SACM) as part of your application for COR certification.

233

Continuum-kinetic-microscopic model of lung clearance due to core-annular fluid entrainment  

SciTech Connect (OSTI)

The human lung is protected against aspirated infectious and toxic agents by a thin liquid layer lining the interior of the airways. This airway surface liquid is a bilayer composed of a viscoelastic mucus layer supported by a fluid film known as the periciliary liquid. The viscoelastic behavior of the mucus layer is principally due to long-chain polymers known as mucins. The airway surface liquid is cleared from the lung by ciliary transport, surface tension gradients, and airflow shear forces. This work presents a multiscale model of the effect of airflow shear forces, as exerted by tidal breathing and cough, upon clearance. The composition of the mucus layer is complex and variable in time. To avoid the restrictions imposed by adopting a viscoelastic flow model of limited validity, a multiscale computational model is introduced in which the continuum-level properties of the airway surface liquid are determined by microscopic simulation of long-chain polymers. A bridge between microscopic and continuum levels is constructed through a kinetic-level probability density function describing polymer chain configurations. The overall multiscale framework is especially suited to biological problems due to the flexibility afforded in specifying microscopic constituents, and examining the effects of various constituents upon overall mucus transport at the continuum scale.

Mitran, Sorin, E-mail: mitran@unc.edu

2013-07-01T23:59:59.000Z

234

Microscopic surface structure of C/SiC composite mirrors for space cryogenic telescopes  

E-Print Network [OSTI]

We report on the microscopic surface structure of carbon-fiber-reinforced silicon carbide (C/SiC) composite mirrors that have been improved for the Space Infrared Telescope for Cosmology and Astrophysics (SPICA) and other cooled telescopes. The C/SiC composite consists of carbon fiber, silicon carbide, and residual silicon. Specific microscopic structures are found on the surface of the bare C/SiC mirrors after polishing. These structures are considered to be caused by the different hardness of those materials. The roughness obtained for the bare mirrors is 20 nm rms for flat surfaces and 100 nm rms for curved surfaces. It was confirmed that a SiSiC slurry coating is effective in reducing the roughness to 2 nm rms. The scattering properties of the mirrors were measured at room temperature and also at 95 K. No significant change was found in the scattering properties through cooling, which suggests that the microscopic surface structure is stable with changes in temperature down to cryogenic values. The C/SiC mirror with the SiSiC slurry coating is a promising candidate for the SPICA telescope.

Keigo Enya; Takao Nakagawa; Hidehiro Kaneda; Takashi Onaka; Tuyoshi Ozaki; Masami Kume

2007-07-10T23:59:59.000Z

235

Microscopic nature of inhomogeneous line broadening: Analysis of the excitation-line-narrowing spectra of Cf4+ in CeF4  

Science Journals Connector (OSTI)

Optical transitions between 5f states of tetravalent californium ion doped (1 metal-atom %) into CeF4 exhibit unusually large inhomogeneous broadening. The nature of the inhomogeneous broadening in this system has been studied by using fluorescence line narrowing and excitation line narrowing (ELN). It is shown that the energy distributions of different electronic states of Cf4+ in this system are correlated. In the ELN experiments, reduced excitation linewidth was obtained when selectively monitoring fluorescence emission. A linear relation was observed between the excitation energies of crystal-field states of the G4?5 manifold and the fluorescence wavelength monitored across the inhomogeneous profile of a G6?5–F6?7 transition. Analysis of these results by means of a microscopic theory proposed by Laird and Skinner [J. Chem. Phys. 90, 3880 (1989)] has provided insights into the structural properties of this disordered system.

G. K. Liu; Jin Huang; James V. Beitz

1993-11-01T23:59:59.000Z

236

Delayed choice experiments, the arrow of time, and quantum measurement  

SciTech Connect (OSTI)

By a radical modification of statistical mechanics the measurement process of quantum mechanics can be described in terms of pure, unitary time evolution, with no wave function collapse or many-world ideas. The key notion is 'special states', rare microscopic states of a complex system. Recovering the standard probabilities requires of this theory the appearance of Cauchy-distributed noise in some measurement processes. This article treats experimental situations where such noise might be detected and correlated with the need or absence of need for special states. Included in this possibility are 'delayed choice' experiments, in which the correlation contravenes conventional ideas on causality. Background material on all topics is provided.

Schulman, L. S. [Physics Department, Clarkson University, Potsdam, New York 13699-5820 (United States)

2011-11-29T23:59:59.000Z

237

Research and Design of a Sample Heater for Beam Line 6-2c Transmission X-ray Microscope  

SciTech Connect (OSTI)

There exists a need for environmental control of samples to be imaged by the Transmission X-Ray Microscope (TXM) at the SSRLs Beam Line 6-2c. In order to observe heat-driven chemical or morphological changes that normally occur in situ, microscopes require an additional component that effectively heats a given sample without heating any of the microscope elements. The confinement of the heat and other concerns about the heaters integrity limit which type of heater is appropriate for the TXM. The bulk of this research project entails researching different heating methods used previously in microscopes, but also in other industrial applications, with the goal of determining the best-fitting method, and finally in designing a preliminary sample heater.

Policht, Veronica; /Loyola U., Chicago /SLAC

2012-08-27T23:59:59.000Z

238

A flexible, highly stable electrochemical scanning probe microscope for nanoscale studies at the solid-liquid interface  

E-Print Network [OSTI]

low-noise measurements in ambient, in situ, and electrochemical environments. II. DESIGNA flexible, highly stable electrochemical scanning probe microscope for nanoscale studies at the solid-liquid interface, specifically in electrolyte environments. Quantification of system noise limits

Gimzewski, James

239

High Resolution Quantitative Auto-Radiography to determine microscopic distributions of B-10 in neutron capture therapy  

E-Print Network [OSTI]

The success of Boron Neutron Capture Therapy (BNCT) is heavily dependent on the microscopic distribution of B-10 in tissue. High Resolution Quantitative Auto-Radiography (HRQAR) is a potentially valuable analytical tool ...

Harris, Thomas C. (Thomas Cameron)

2006-01-01T23:59:59.000Z

240

Compact scanning soft-x-ray microscope using a laser-produced plasma source and normal-incidence multilayer mirrors  

Science Journals Connector (OSTI)

We have constructed a scanning soft-x-ray microscope that uses a laser-produced plasma as the soft-x-ray source and normal-incidence multilayer-coated mirrors in a Schwarzschild...

Trail, J A; Byer, R L

1989-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "microscopic double-slit experiment" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


241

Fish scale deformation analysis using scanning electron microscope: New potential biomarker in aquatic environmental monitoring of aluminum and iron contamination  

SciTech Connect (OSTI)

Fish scale has the potential to be a rapid biomarker due to its structure and high possibility to come into contact with any pollutant in the aquatic environment. The scale structure consists of osteoblastic cells and other bone materials such as collagen where it is possible to form a molecular complex with heavy metals such as aluminum and iron. Hence, aluminum and iron in water could possibly destroy the scale material and marked as a scale deformation that quantitatively could be analyzed by comparing it to the normal scale structure. Water sampling and fish cage experiment were performed between June and July 2011 in Porong river which represented the water body that has high aluminum and iron contamination. The filtered water samples were preserved and extracted using the acid-mixture procedure prior to measurement of the aluminum and iron concentrations using Inductively Coupled Plasma Atomic Emission Spectroscopy (ICP-AES), while samples for total suspended solid (TSS) analysis were kept at 4 °C in cool-boxes. The scales were cleaned with sterile water, then dehydrated in 30, 50, 70, and 90% ethanol and dried on filter papers. They were then mounted on an aluminum stub and coated with gold in a sputter coater prior to Scanning Electron Microscope (SEM) observation. According to the SEM analysis, it was found that there were several deformations on the scale samples taken from sites that have high concentrations of aluminum and iron i.e. the increasing number of pits, deformation and decreasing number of spherules and ridges while the control scale exhibited the normal features. However, the site with higher TSS and pH indicated lower aluminum effect. A moderate correlation was found between the number of pits with aluminum (r=0.43) and iron (r=0.41) concentrations. Fish scale deformation using SEM analysis can potentially be a rapid biomarker in aquatic monitoring of aluminum and iron contamination. However, the measurement must be accompanied by pH and TSS observations.

Hidayati, Dewi; Sulaiman, Norela; Othman, Shuhaimi; Ismail, B. S. [School of Environmental and Natural Resource Sciences, Faculty of Science and Technology, Universiti Kebangsaan Malaysia, 43600 Bangi, Selangor (Malaysia)

2013-11-27T23:59:59.000Z

242

Fertilizer Experiments with Cotton.  

E-Print Network [OSTI]

LIBRARY. A & M COLLEGE, CAMPUS I TEXAS AGRICULTURAL EXPERIMENT STATION A. B. CONNER, DIRECTOR COLLEGE STATION, BRAZOS COUNTY, TEXAS BULLETIN NO. 469 DIVISION OF AGRONOMY Fertilizer Experiments with Cotton AGRICULTURAL AND MECHANICAL COLLEGE... of seven years experiments with fertilizers on cotton at Troup, Nacogdoches, Angleton, College Station, Beeville, Tem- ple, and Denton, Texas, are reported in this Bulletin. The Kirvin fine sandy loam at Troup and the Nacogdoches and Ruston fine sandy...

Reynolds, E. B. (Elbert Brunner)

1932-01-01T23:59:59.000Z

243

Irish Potato Fertilizer Experiments.  

E-Print Network [OSTI]

S AGRICULTURAL EXPERIMENT STATIONS. BULLETIN NO 101 January, 1908. ish Potato Fertilizer Experiments - Postoffice, COLLEGE STATION, BRAZOS COUNTY, TEXAS. TEXAS AGRICULTURAL EXPERIMENT STATIONS OFFICERS. GOVERNING BOARD. (Board of Directors... was sc Be Irish Potato Fl nents W. S. Hotchkiss and E. J. Kyle. e fertilizer work with the Irish potato at Troupe was first planned fall of 1902. The results which were gotten upon harvesting the the spring of 1903 were so opposed, especially...

Hotchkiss, W.S.; Kyle, E. J. (Edwin Jackson)

1908-01-01T23:59:59.000Z

244

A Simple Eclipse Experiment  

Science Journals Connector (OSTI)

... the experiment above cited may be produced in one of three ways: first, by roughening the surface of the pin's head; secondly, by dust on the edges of ...

W. G. ROYAL-DAWSON

1912-06-06T23:59:59.000Z

245

CASL Test Stand Experience  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Industry Test Stand Experience Stephen Hess, EPRI Heather Feldman, EPRI Brenden Mervin, EPRI Martin Pytel, EPRI Rose Montgomery, TVA Bill Bird, TVA Fausto Franceschini,...

246

Operating Experience Committee Charter  

Broader source: Energy.gov (indexed) [DOE]

and the ability to learn from experience are attributes consistently evident in High Reliability Organizations. These organizations are learning organizations, which have...

247

Spectro-Microscopic Measurements of Carbonaceous Aerosol Aging in Central California  

SciTech Connect (OSTI)

Carbonaceous aerosols are responsible for large uncertainties in climate models, degraded visibility, and adverse health effects. The Carbonaceous Aerosols and Radiative Effects Study (CARES) was designed to study carbonaceous aerosols in the natural environment of Central Valley, California, and learn more about their atmospheric formation and aging. This paper presents results from spectro-microscopic measurements of carbonaceous particles collected during CARES at the time of pollution accumulation event (June 27-29, 2010), when in situ measurements indicated an increase in the organic carbon content of aerosols as the Sacramento urban plume aged. Computer controlled scanning electron microscopy coupled with an energy dispersive X-ray detector (CCSEM/EDX) and scanning transmission X-ray microscopy coupled with near edge X-ray absorption spectroscopy (STXM/NEXAFS) were used to probe the chemical composition and morphology of individual particles. It was found that the mass of organic carbon on individual particles increased through condensation of secondary organic aerosol. STXM/NEXAFS indicated that the number fraction of homogenous organic particles lacking inorganic inclusions (greater than ~50 nm diameter) increased with plume age as did the organic mass per particle. Comparison of the CARES spectro-microscopic data set with a similar dataset obtained in Mexico City during the MILAGRO campaign showed that individual particles in Mexico City contained twice as much carbon as those sampled during CARES. The number fraction of soot particles at the Mexico City urban site (30%) was larger than at the CARES urban site (10%) and the most aged samples from CARES contained less carbon-carbon double bonds. Differences between carbonaceous particles in Mexico City and California result from different sources, photochemical conditions, gas phase reactants, and secondary organic aerosol precursors. The detailed results provided by these spectro-microscopic measurements will allow for a comprehensive evaluation of aerosol process models used in climate research.

Moffet, Ryan C.; Rodel, Tobias; Kelly, Stephen T.; Yu, Xiao-Ying; Carroll, Gregory; Fast, Jerome D.; Zaveri, Rahul A.; Laskin, Alexander; Gilles, Mary K.

2013-10-29T23:59:59.000Z

248

Microscopic structure, discommensurations, and tiling of Si(111)/Cu-‘‘5×5’’  

Science Journals Connector (OSTI)

We derive a detailed, microscopic description of the Si(111)/Cu-‘‘5×5’’ reconstruction. The key to understanding this structure is the x-ray standing-wave determination of the Cu registry with respect to the Si substrate. With Cu basically in H3 and substitutional sites the buckled Si(111) surface bilayer converts to an almost planar, hexagonal Cu2Si layer. The straightened bond angles and the associated increase in the lateral lattice constant give rise to a hexagonal network of discommensurations of period ?5.5aSi. Complete tiling of the surface requires three types of twisted (±3°) domains, two of which are rotationally equivalent.

J. Zegenhagen; E. Fontes; F. Grey; J. R. Patel

1992-07-15T23:59:59.000Z

249

The Scanning Theremin Microscope: A Model Scanning Probe Instrument for Hands-On Activities  

Science Journals Connector (OSTI)

(9, 10) However, we decided upon a different approach and worked with scanning probe principles to create a large-scale scanning device, the scanning theremin microscope (SThM). ... The simplest mode of scanning is to move the pantograph to scan the probe across the surface at a fixed height, listening for changes in pitch. ... We present a cascade-based computation scheme that has all of the devices and interconnects required for the one-time computation of an arbitrary logic function. ...

Rebecca C. Quardokus; Natalie A. Wasio; S. Alex Kandel

2013-12-20T23:59:59.000Z

250

Scanning electrochemical microscope characterization of thin film combinatorial libraries for fuel cell electrode applications  

Science Journals Connector (OSTI)

Pt–Ru combinatorial libraries of potential fuel cell anode catalysts are formed by sequential sputter deposition through masks onto Si wafers. Scanning electrochemical microscopy (SECM) is employed for characterization of electrocatalytic activity. Aspects of using a scanning electrochemical microscope for characterization of an array of thin film fuel cell electrode materials are discussed. It is shown that in applying SECM to library characterization, careful attention must be paid to thin film annealing, specimen topography and tip degradation in order to realize meaningful results. Results from a Pt–Ru thin film library reveal the most active members near the 50 Pt/50 Ru composition.

M Black; J Cooper; P McGinn

2005-01-01T23:59:59.000Z

251

10-fold detection range increase in quadrant-photodiode position sensing for photonic force microscope  

SciTech Connect (OSTI)

We propose a technique that permits one to increase by one order of magnitude the detection range of position sensing for the photonic force microscope with quadrant photodetectors (QPDs). This technique takes advantage of the unavoidable cross-talk between output signals of the QPD and does not assume that the output signals are linear in the probe displacement. We demonstrate the increase in the detection range from 150 to 1400 nm for a trapped polystyrene sphere with radius of 300 nm as probe.

Perrone, Sandro; Volpe, Giovanni [ICFO-Institut de Ciencies Fotoniques, Mediterranean Technology Park, Castelldefels (Barcelona) 08860 (Spain); Petrov, Dmitri [ICFO-Institut de Ciencies Fotoniques, Mediterranean Technology Park, Castelldefels (Barcelona) 08860 (Spain); Institucio Catalana de Recerca i Estudis Avancats (ICREA), Barcelona 08010 (Spain)

2008-10-15T23:59:59.000Z

252

Microscopic identification of the compensation mechanisms in Si-doped GaAs  

Science Journals Connector (OSTI)

The compensation mechanisms of SiGa donors in GaAs are determined by scanning tunneling microscopy. With increasing Si concentration the SiGa donors are consecutively electrically deactivated by SiAs acceptors, Si clusters, and SiGa-Ga-vacancy complexes. A microscopic model based on the screened Coulomb interaction between charged dopants, the amphoteric nature of Si, and the Fermi-level effect is proposed. It explains the observed defects, the critical Si concentrations of each identified mechanism, and predicts the solubility limit of Si in GaAs. © 1996 The American Physical Society.

C. Domke, Ph. Ebert, M. Heinrich, and K. Urban

1996-10-15T23:59:59.000Z

253

Microscopic study of chiral rotation in odd-odd A $\\sim$ 100 nuclei  

E-Print Network [OSTI]

A systematic study of the doublet bands observed in odd-odd mass $\\sim$ 100 is performed using the microscopic triaxial projected shell model approach. This mass region has depicted some novel features which are not observed in other mass regions, for instance, it has been observed that two chiral bands cross diabatically in $^{106}$Ag. It is demonstrated that this unique feature is due to crossing of the two 2-quasiparticle configurations having different intrinsic structures. Further, we provide a complete set of transition probabilities for all the six-isotopes studied in this work and it is shown that the predicted transitions are in good agreement with the available experimental data.

W. A. Dar; J. A. Sheikh; G. H. Bhat; R. Palit; S. Frauendorf

2013-12-04T23:59:59.000Z

254

A soft-X-ray imaging microscope with multilayer-coated Schwarzschild optics  

Science Journals Connector (OSTI)

We constructed a soft-X-ray imaging microscope based on a multilayer-coated Schwarzschild objective. The Schwarzschild objective was designed to have a 50 x magnification and a numerical aperture of 0.25. The mirrors of the objective were coated with a Mo/Si multilayer to reflect the Si L emission. The overall throughput of the objective was 14% at a peak wavelength of 13.3 nm. The 5-?m wide stripe of SiO 2 lithographically patterned was observed under irradiation with an electron beam of 1 ?A.

M. Toyoda; Y. Shitani; M. Yanagihara; T. Ejima; M. Yamamoto; M. Watanabe

2000-01-01T23:59:59.000Z

255

Development of x-ray photoelectron microscope with an x-ray laser source  

Science Journals Connector (OSTI)

We have constructed an x-ray photoelectron microscopic system with an x-ray laser as an x-ray source. The lasing line is the Li-like Al 3d-4f transition at 15.47 nm where the recombining Al plasma is used as the x-ray laser medium. The beam from the x-ray laser cavity was then focused by using a Schwarzschild mirror coated with Mo/Si multilayers. The x-ray beam size with a diameter less than 0.5 ?m and the estimated photon number of about 2×10 6 ? photons/shot into the spot were achieved.

Tadayuki Ohchi; Naohiro Yamaguchi; Chiemi Fujikawa; Tamio Hara; Katsumi Watanabe; Ibuki Tanaka; Masami Taguchi

2000-01-01T23:59:59.000Z

256

The Invisible World: Early modern philosophy and the invention of the microscope  

Science Journals Connector (OSTI)

...for its power to lead us to knowledge. Presumably, the more and the better we can see, the more we will know. In this fascinating account of the invisible world opened up by the invention of the microscope, Catherine Wilson suggests that seeing more may not necessarily mean understanding more. Wilson... At the beginning of the Metaphysics, Aristotle exalts sight above the other senses for its power to lead us to knowledge. Presumably, the more and the better we can see, the more we will know. In this fascinating account of the invisible world opened up ...

Pellegrino E.D.

1996-02-08T23:59:59.000Z

257

The DITE Tokamak Experiment  

Science Journals Connector (OSTI)

...April 1981 research-article The DITE Tokamak Experiment J. W. M. Paul W. H. M...magnetic containment of hot plasma in the tokamak toroidal configuration, and plasma heating...these concepts in the Divertor Injection Tokamak Experiment (DITE) at Culham Laboratory...

1981-01-01T23:59:59.000Z

258

Practical Experiments in Statistics  

Science Journals Connector (OSTI)

An simple and inexpensive experiment in radioactive decay that can be applied to any field that requires a knowledge of statistics; the primary goal is to familiarize students with probability distributions. ... A Didactic Experience of Statistical Analysis for the Determination of Glycine in a Nonaqueous Medium Using ANOVA and a Computer Program ...

Craig A. Stone; Lorin D. Mumaw

1995-01-01T23:59:59.000Z

259

Conference: Synergy Between Experiment  

E-Print Network [OSTI]

Kaxiras (Harvard) Synopsis ­ Society's ceaseless demand for clean, renewable energy resources on rapidly developing areas of nanoscale computation, will hold a conference on energy research, experimentAn NNIN/C Conference: Synergy Between Experiment and Computation in Energy ­ Looking to 2030. Yu

Heller, Eric

260

COR Summary of Experience  

Broader source: Energy.gov (indexed) [DOE]

COR SUMMARY OF EXPERIENCE Effective January 1, 2012, the Office of Federal Procurement Policy (OFPP) added a requirement for past COR experience to qualify for FAC-COR Level II (journeyman level) and III (senior/expert level). At least 1 year of COR experience is required to qualify for Level II; 2 years for Level III. OFPP strongly advises that applicants for Level III have prior experience at Level II. Applicants with no prior experience as an appointed COR must demonstrate proficiency in the specific competencies listed below for the same time period, validated by a cognizant Contracting Officer or Contract Specialist by signature below or an accompanying e-mail. Submit this form to your Site Acquisition Career Manager (SACM) as part of your application

Note: This page contains sample records for the topic "microscopic double-slit experiment" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


261

A new approach to nuclear microscopy: The ion-electron emission microscope  

SciTech Connect (OSTI)

A new multidimensional high lateral resolution ion beam analysis technique, Ion-Electron Emission Microscopy or IEEM is described. Using MeV energy ions, IEEM is shown to be capable of Ion Beam Induced Charge Collection (IBICC) measurements in semiconductors. IEEM should also be capable of microscopically and multidimensionally mapping the surface and bulk composition of solids. As such, IIEM has nearly identical capabilities as traditional nuclear microprobe analysis, with the advantage that the ion beam does not have to be focused. The technique is based on determining the position where an individual ion enters the surface of the sample by projection secondary electron emission microscopy. The x-y origination point of a secondary electron, and hence the impact coordinates of the corresponding incident ion, is recorded with a position sensitive detector connected to a standard photoemission electron microscope (PEEM). These signals are then used to establish coincidence with IBICC, atomic, or nuclear reaction induced ion beam analysis signals simultaneously caused by the incident ion.

Doyle, B.L.; Vizkelethy, G.; Walsh, D.S. [Sandia National Labs., Albuquerque, NM (United States); Senftinger, B. [Staib Instrumente GmbH, Langenbach (Germany); Mellon, M. [Quantar Technologies Inc., Santa Cruz, CA (United States)

1998-11-01T23:59:59.000Z

262

A near-field scanning microwave microscope based on a superconducting resonator for low power measurements  

E-Print Network [OSTI]

We report on the design and performance of a cryogenic (300 mK) near-field scanning microwave microscope. It uses a microwave resonator as the near-field sensor, operating at a frequency of 6 GHz and microwave probing amplitudes down to 100 uV, approaching low enough photon population (N~1000) of the resonator such that coherent quantum manipulation becomes feasible. The resonator is made out of a miniaturized distributed fractal superconducting circuit that is integrated with the probing tip, micromachined to be compact enough such that it can be mounted directly on a quartz tuning-fork, and used for parallel operation as an atomic force microscope (AFM). The resonator is magnetically coupled to a transmission line for readout, and to achieve enhanced sensitivity we employ a Pound-Drever-Hall measurement scheme to lock to the resonance frequency. We achieve a well localized near-field around the tip such that the microwave resolution is comparable to the AFM resolution, and a capacitive sensitivity down to 6.4x10^-20 F/rtHz, limited by mechanical noise. We believe that the results presented here are a significant step towards probing quantum systems at the nanoscale using near-field scanning microwave microscopy.

S. E. de Graaf; A. V. Danilov; A. Adamyan; S. E. Kubatkin

2014-04-02T23:59:59.000Z

263

Microscopic characteristics of solid particles in opposed multi-burner gasifier  

Science Journals Connector (OSTI)

Abstract The microscopic characteristics of solid particles have important influence on the formation of fluid slag, coarse slag and fine slag during entrained-flow gasification process. Based on the bench-scale opposed multi-burner (OMB) gasifier, solid particles were sampled at different axial distances along the gasifier chamber under typical operating conditions (oxygen and carbon atomic ratio at 1.0). The microscopic characteristics of solid particles were studied by using N2 adsorption-desorption and scanning electron microscopy (SEM) methods. The results show that the solid particles are comprised mainly of porous irregular particle and spherical particle, and few solid particles generated at burner plane perform as dense irregular and hollow shape. As the gasification reaction proceeds along the axis of gasifier, the surface structure of particles becomes rougher, and the pore structure increases. The isotherms of particle samples are all type II, and the particle samples consist of continuous and complete system of pores. The hysteresis loops are H3-type, and there are a large amount of fractured pores. BET surface area and pore volume increase with increasing distance from the burner plane, and average pore diameter gradually reduces, and larger changes occur in the vicinity of the burner plane. The mesopores less than 10 nm vary apparently and increase with increasing distances from the burner plane, while the pores larger than 10 nm are almost unchanged.

Li-jun SUN; Yan GONG; Qing-hua GUO; Guang-suo YU

2014-01-01T23:59:59.000Z

264

Integration of an Atomic Force Microscope in a Beamline Sample Environment  

SciTech Connect (OSTI)

We developed and optimised an optics-free Atomic Force Microscope (AFM) that can be directly installed on most of the synchrotron radiation end-stations. The combination of Scanning Probe Microscopies with X-ray microbeams adds new possibilities to the variety of synchrotron radiation techniques. The instrument can be used for atomic force imaging of the investigated sample or to locally measure the X-ray absorption or diffraction, or it can also be used to mechanically interact with the sample while simultaneously taking spectroscopy or diffraction measurements. The local character of these measurements is intrinsically linked with the use of the Atomic Force Microscope tip. It is the sharpness of the tip that gives the opportunity to measure the photons flux impinging on it giving beam position monitor features, or allows to locally measure the absorption coefficient or the shape of the diffraction pattern. As an example of the possibilities opened by the instrument we will show diffraction measurements performed on a Ge/Si island while being indented with the AFM tip providing local measure of the Young coefficient. Three ESRF beamlines are going to be equipped with this new instrument.

Rodrigues, M. S.; Hrouzek, M.; Dhez, O.; Comin, F. [ESRF, 6 rue Horowitz 38042 Grenoble Cedex (France); Chevrier, J. [Institut Neel-CNRS and Universite Joseph Fourier, 38042 Grenoble (France)

2010-06-23T23:59:59.000Z

265

The Circular Unitary Ensemble and the Riemann zeta function: the microscopic landscape  

E-Print Network [OSTI]

We show in this paper that after proper scalings, the characteristic polynomial of a random unitary matrix converges almost surely to a random analytic function whose zeros, which are on the real line, form a determinantal point process with sine kernel. Our scaling is performed at the so-called "microscopic" level, that is we consider the characteristic polynomial at points which are of order $1/n$ distant. We draw several consequences from our result. On the random matrix theory side, we obtain the limiting distribution for ratios of characteristic polynomials where the points are evaluated at points of the form $\\exp(2 i \\pi \\alpha/n)$. We also give an explicit expression for the (dependence) relation between two different values of the characteristic polynomial on the microscopic scale. On the number theory side, inspired by the Keating-Snaith philosophy, we conjecture some new limit theorems for the Riemann zeta function at the stochastic process level as well as some alternative approach to the conjecture by Goldston, Montgomery and Gonek for the moments of the logarithmic derivative of the Riemann zeta function. We prove our main random matrix theory result in the framework of virtual isometries to circumvent the fact that the rescaled characteristic polynomial does not even have a moment of order one, hence making the classical techniques of random matrix theory difficult to apply.

Reda Chhaibi; Joseph Najnudel; Ashkan Nikeghbali

2014-10-06T23:59:59.000Z

266

A near-field scanning microwave microscope based on a superconducting resonator for low power measurements  

E-Print Network [OSTI]

We report on the design and performance of a cryogenic (300 mK) near-field scanning microwave microscope. It uses a microwave resonator as the near-field sensor, operating at a frequency of 6 GHz and microwave probing amplitudes down to 100 uV, approaching low enough photon population (N~1000) of the resonator such that coherent quantum manipulation becomes feasible. The resonator is made out of a miniaturized distributed fractal superconducting circuit that is integrated with the probing tip, micromachined to be compact enough such that it can be mounted directly on a quartz tuning-fork, and used for parallel operation as an atomic force microscope (AFM). The resonator is magnetically coupled to a transmission line for readout, and to achieve enhanced sensitivity we employ a Pound-Drever-Hall measurement scheme to lock to the resonance frequency. We achieve a well localized near-field around the tip such that the microwave resolution is comparable to the AFM resolution, and a capacitive sensitivity down to 6...

de Graaf, S E; Adamyan, A; Kubatkin, S E

2014-01-01T23:59:59.000Z

267

The Neutron EDM Experiment  

E-Print Network [OSTI]

The neutron EDM experiment has played an important part over many decades in shaping and constraining numerous models of CP violation. This review article discusses some of the techniques used to calculate EDMs under various theoretical scenarios, and highlights some of the implications of EDM limits upon such models. A pedagogical introduction is given to the experimental techniques employed in the recently completed ILL experiment, including a brief discussion of the dominant systematic uncertainties. A new and much more sensitive version of the experiment, which is currently under development, is also outlined.

P. G. Harris

2007-09-19T23:59:59.000Z

268

BNL | Completed ATF Experiments  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Completed / Terminated ATF Experiments Completed / Terminated ATF Experiments AE01 - Micro-undulator FEL Experiment. Spokesperson: I. Ben-Zvi, BNL. (1992 - 1997) AE02. - Inverse FEL Accelerator. Spokesperson: A. van Steenbergen, BNL. [Yale, Columbia]. (1992-1997) AE03 - Laser Grating Accelerator Experiment. Spokesperson: R. Fernow, BNL. [Princeton, LANL]. (1992- 1996) AE05 - Nonlinear-Compton Scattering. Spokesperson: K. McDonald, Princeton (1992-) AE06 - Inverse Cherenkov Acceleration. Spokesperson: W. Kimura, STI Optronics. [UCSB,BNL]. (1992-1997) AE08 - Far Infrared Radiation Source. Spokesperson J. Walsh, Dartmouth. [Oxford, BNL]. (1992 - 1994) AE09. - Photocathode R&D. Spokesperson: T. Rao, BNL. (1992 - ) AE10. - High Gain Harmonic Generation FEL. Spokesperson: L.H. Yu, BNL. [ANL] (1992 - 2001)

269

The Colorado FRC Experiment  

Science Journals Connector (OSTI)

A new experiment is under development for the study of turbulence, flow, and cross-field transport in a field-reversed configuration. The facility is a merged-spheromak device driven by magnetized coaxial plasma ...

T. Munsat; C. L. Ellison; A. Light; J. Nuger; W. Willcockson…

2008-06-01T23:59:59.000Z

270

Corporate Operating Experience Program  

Broader source: Energy.gov [DOE]

The DOE Corporate Operating Experience Program helps to prevent the recurrence of significant adverse events/trends by sharing performance information, lessons learned and good practices across the DOE complex.

271

General relativity and experiment  

E-Print Network [OSTI]

The confrontation between Einstein's theory of gravitation and experiment is summarized. Although all current experimental data are compatible with general relativity, the importance of pursuing the quest for possible deviations from Einstein's theory is emphasized.

T. Damour

1994-12-08T23:59:59.000Z

272

Some Experiments in Magnetism  

Science Journals Connector (OSTI)

1 January 1904 research-article Some Experiments in Magnetism T. C. Porter The Royal Society is collaborating with JSTOR to digitize, preserve, and extend access to Proceedings of the Royal Society of London. www.jstor.org

1904-01-01T23:59:59.000Z

273

Solar neutrino experiments  

Science Journals Connector (OSTI)

The main results of solar neutrino experiments are presented, ranging from the pioneering Cl - Ar experiment up to the most recent Borexino data. Solar neutrino fluxes and spectra are given for two versions of the standard solar model, and radiochemical and electronic detectors are briefly described. The results of Be- and pep-neutrino detection by Borexino are presented. The LMA-MSW oscillation solution of the solar neutrino problem is considered.

A V Derbin

2014-01-01T23:59:59.000Z

274

The MAJORANA Experiment  

E-Print Network [OSTI]

The MAJORANA collaboration is actively pursuing research and development aimed at a tonne-scale 76Ge neutrinoless double-beta decay) experiment. The current, primary focus is the construction of the MAJORANA DEMONSTRATOR experiment, an R&D effort that will field approximately 40kg of germanium detectors with mixed enrichment levels. This article provides a status update on the construction of the DEMONSTRATOR.

The MAJORANA Collaboration

2011-09-22T23:59:59.000Z

275

Complete Experiment Safety Documentation  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Complete Experiment Safety Documentation Print Complete Experiment Safety Documentation Print User Safety Overview The steps for authorization of your experiment are described below. The ALS Experiment Coordinators are available to support you through this process. Please This e-mail address is being protected from spambots. You need JavaScript enabled to view it at any stage if you have questions or need more information. Prior to Your Arrival at the ALS 1. Complete or Update and Experiment Safety Sheet If you did not submit a General User Proposal, you must submit an ESS one month prior to arrival at the ALS. 2. Biological, Radioactive, Hazardous, and Electrical Materials, and Lasers If your experiment involves the use of any of the above materials-no matter how small the quantities are or how innocuous the sample may be-additional authorization may be required. Please submit your ESS early and clearly identify your materials. Our staff will assess the hazards and contact you about any necessary supplementary documentation.

276

Complete Experiment Safety Documentation  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Complete Experiment Safety Documentation Print Complete Experiment Safety Documentation Print User Safety Overview The steps for authorization of your experiment are described below. The ALS Experiment Coordinators are available to support you through this process. Please This e-mail address is being protected from spambots. You need JavaScript enabled to view it at any stage if you have questions or need more information. Prior to Your Arrival at the ALS 1. Complete or Update and Experiment Safety Sheet If you did not submit a General User Proposal, you must submit an ESS one month prior to arrival at the ALS. 2. Biological, Radioactive, Hazardous, and Electrical Materials, and Lasers If your experiment involves the use of any of the above materials-no matter how small the quantities are or how innocuous the sample may be-additional authorization may be required. Please submit your ESS early and clearly identify your materials. Our staff will assess the hazards and contact you about any necessary supplementary documentation.

277

Complete Experiment Safety Documentation  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Complete Experiment Safety Documentation Print Complete Experiment Safety Documentation Print User Safety Overview The steps for authorization of your experiment are described below. The ALS Experiment Coordinators are available to support you through this process. Please This e-mail address is being protected from spambots. You need JavaScript enabled to view it at any stage if you have questions or need more information. Prior to Your Arrival at the ALS 1. Complete or Update and Experiment Safety Sheet If you did not submit a General User Proposal, you must submit an ESS one month prior to arrival at the ALS. 2. Biological, Radioactive, Hazardous, and Electrical Materials, and Lasers If your experiment involves the use of any of the above materials-no matter how small the quantities are or how innocuous the sample may be-additional authorization may be required. Please submit your ESS early and clearly identify your materials. Our staff will assess the hazards and contact you about any necessary supplementary documentation.

278

Complete Experiment Safety Documentation  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Complete Experiment Safety Documentation Print Complete Experiment Safety Documentation Print User Safety Overview The steps for authorization of your experiment are described below. The ALS Experiment Coordinators are available to support you through this process. Please This e-mail address is being protected from spambots. You need JavaScript enabled to view it at any stage if you have questions or need more information. Prior to Your Arrival at the ALS 1. Complete or Update and Experiment Safety Sheet If you did not submit a General User Proposal, you must submit an ESS one month prior to arrival at the ALS. 2. Biological, Radioactive, Hazardous, and Electrical Materials, and Lasers If your experiment involves the use of any of the above materials-no matter how small the quantities are or how innocuous the sample may be-additional authorization may be required. Please submit your ESS early and clearly identify your materials. Our staff will assess the hazards and contact you about any necessary supplementary documentation.

279

Transverse-Coherence Properties of the Free-Electron-Laser FLASH at DESY  

SciTech Connect (OSTI)

A general theoretical approach based on the decomposition of statistical fields into a sum of independently propagating transverse modes was used for the analysis of the coherence properties of the new free-electron laser source FLASH operated at 13.7 nm wavelength. The analysis shows that several transverse modes are contributing to the total radiation field of FLASH. The results of theoretical calculations are compared with measurements using Young's double-slit experiment. The coherence lengths in the horizontal and in the vertical directions 20 m downstream from the source are estimated at 300 and 250 {mu}m, respectively.

Singer, A.; Vartanyants, I. A.; Kuhlmann, M.; Duesterer, S.; Treusch, R.; Feldhaus, J. [HASYLAB at DESY, Notkestrasse 85, D-22607 Hamburg (Germany)

2008-12-19T23:59:59.000Z

280

Partial coherence with twin photons  

Science Journals Connector (OSTI)

An approach for calculating fourth-order coherence functions between fields produced in the parametric down-conversion process is proposed. It takes into account the transverse correlations between twin photons and is used to calculate the visibility of the interference patterns obtained in double-slit experiments with coincidence detection. The finite dimension of the light source and detectors are shown to be responsible for a kind of partial coherence which affects the visibility of the fringes. The results explain known features and predict other ones.

P. H. Souto Ribeiro

1997-11-01T23:59:59.000Z

Note: This page contains sample records for the topic "microscopic double-slit experiment" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


281

Hyperspectral microscope for in vivo imaging of microstructures and cells in tissues  

DOE Patents [OSTI]

An optical hyperspectral/multimodal imaging method and apparatus is utilized to provide high signal sensitivity for implementation of various optical imaging approaches. Such a system utilizes long working distance microscope objectives so as to enable off-axis illumination of predetermined tissue thereby allowing for excitation at any optical wavelength, simplifies design, reduces required optical elements, significantly reduces spectral noise from the optical elements and allows for fast image acquisition enabling high quality imaging in-vivo. Such a technology provides a means of detecting disease at the single cell level such as cancer, precancer, ischemic, traumatic or other type of injury, infection, or other diseases or conditions causing alterations in cells and tissue micro structures.

Demos; Stavros G. (Livermore, CA)

2011-05-17T23:59:59.000Z

282

Hybrid methods for witnessing entanglement in a microscopic-macroscopic system  

SciTech Connect (OSTI)

We propose a hybrid approach to the experimental assessment of the genuine quantum features of a general system consisting of microscopic and macroscopic parts. We infer entanglement by combining dichotomic measurements on a bidimensional system and phase-space inference through the Wigner distribution associated with the macroscopic component of the state. As a benchmark, we investigate the feasibility of our proposal in a bipartite-entangled state composed of a single-photon and a multiphoton field. Our analysis shows that, under ideal conditions, maximal violation of a Clauser-Horne-Shimony-Holt-based inequality is achievable regardless of the number of photons in the macroscopic part of the state. The difficulty in observing entanglement when losses and detection inefficiency are included can be overcome by using a hybrid entanglement witness that allows efficient correction for losses in the few-photon regime.

Spagnolo, Nicolo [Dipartimento di Fisica, Sapienza Universita di Roma, Piazzale Aldo Moro 5, I-00185 Roma (Italy); Consorzio Nazionale Interuniversitario per le Scienze Fisiche della Materia, Piazzale Aldo Moro 5, I-00185 Roma (Italy); Vitelli, Chiara [Dipartimento di Fisica, Sapienza Universita di Roma, Piazzale Aldo Moro 5, I-00185 Roma (Italy); Paternostro, Mauro [School of Mathematics and Physics, Queen's University, BT 7 1NN Belfast (United Kingdom); De Martini, Francesco [Dipartimento di Fisica, Sapienza Universita di Roma, Piazzale Aldo Moro 5, I-00185 Roma (Italy); Accademia Nazionale dei Lincei, via della Lungara 10, I-00165 Roma (Italy); Sciarrino, Fabio [Dipartimento di Fisica, Sapienza Universita di Roma, Piazzale Aldo Moro 5, I-00185 Roma (Italy); Istituto Nazionale di Ottica, Consiglio Nazionale delle Ricerche (INO-CNR), largo E. Fermi 6, I-50125 Firenze (Italy)

2011-09-15T23:59:59.000Z

283

Microscopic Description of Entanglements in Polyethylene Networks and Melts: Strong, Weak, Pairwise, and Collective Attributes  

E-Print Network [OSTI]

We present atomistic molecular dynamics simulations of two Polyethylene systems where all entanglements are trapped: a perfect network, and a melt with grafted chain ends. We examine microscopically at what level topological constraints can be considered as a collective entanglement effect, as in tube model theories, or as certain pairwise uncrossability interactions, as in slip-link models. A pairwise parameter, which varies between these limiting cases, shows that, for the systems studied, the character of the entanglement environment is more pairwise than collective. We employ a novel methodology, which analyzes entanglement constraints into a complete set of pairwise interactions, similar to slip links. Entanglement confinement is assembled by a plethora of links, with a spectrum of confinement strengths, from strong to weak. The strength of interactions is quantified through a link `persistence', which is the fraction of time for which the links are active. By weighting links according to their strength,...

Anogiannakis, Stefanos D; Theodorou, Doros N

2012-01-01T23:59:59.000Z

284

Electron microscope studies. Progress report, June 1, 1992--November 1, 1993  

SciTech Connect (OSTI)

During the past year we have continued our work on the mirror-corrected high resolution STEM. We have made significant progress in the design and fabrication of the various microscope sub-systems and have completed a new display system. Additional calculations and computer simulations have been performed to confirm the original theory of mirror correctors. In our biological work we have made a careful study of the structure of globins, vertebrate and invertebrate, using the accumulated information contained in the Brookhaven Data Bank (3D structures), the Protein Identification Resource (ID sequences) and the data we have obtained with the STEM. Statistical templates have been generated to predict various classes of globins.

Crewe, A.V.; Kapp, O.H.

1993-11-01T23:59:59.000Z

285

Microscopic model, spin-wave theory, and competing orders in double perovskites  

Science Journals Connector (OSTI)

We present a microscopic theory of carrier-induced ferrimagnetism in metallic double perovskite compounds such as Sr2FeMoO6 and Sr2FeReO6 which have recently attracted intense interest for their possible applications to magnetotransport devices. The theory is based on an effective “Kondo-like” Hamiltonian treated here within the large-S expansion. We find that depending on the value of the carrier density the ground state is either a ferrimagnet or a layered antiferromagnet. The ferrimagnetic state has a robust half-metallic electronic structure. The transition to antiferromagnetic phase is first order, accompanied with the regime of phase separation. We study spin-wave spectrum including quantum corrections and find strongly enhanced quantum effects in the vicinity of zero-temperature phase transition.

G. Jackeli

2003-09-02T23:59:59.000Z

286

Drift-insensitive distributed calibration of probe microscope scanner in nanometer range: Real mode  

E-Print Network [OSTI]

A method is described intended for distributed calibration of a probe microscope scanner consisting in a search for a net of local calibration coefficients (LCCs) in the process of automatic measurement of a standard surface, whereby each point of the movement space of the scanner can be defined by a unique set of scale factors. Feature-oriented scanning (FOS) methodology is used to implement the distributed calibration, which permits to exclude in situ the negative influence of thermal drift, creep and hysteresis on the obtained results. The sensitivity of LCCs to errors in determination of position coordinates of surface features forming the local calibration structure (LCS) is eliminated by performing multiple repeated measurements followed by building regression surfaces. There are no principle restrictions on the number of repeated LCS measurements. Possessing the calibration database enables correcting in one procedure all the spatial distortions caused by nonlinearity, nonorthogonality and spurious cro...

Lapshin, Rostislav V

2015-01-01T23:59:59.000Z

287

Drift-insensitive distributed calibration of probe microscope scanner in nanometer range: Approach description  

E-Print Network [OSTI]

A method is described intended for distributed calibration of a probe microscope scanner consisting in a search for a net of local calibration coefficients (LCCs) in the process of automatic measurement of a standard surface, whereby each point of the movement space of the scanner can be defined by a unique set of scale factors. Feature-oriented scanning (FOS) methodology is used to implement the distributed calibration, which permits to exclude in situ the negative influence of thermal drift, creep and hysteresis on the obtained results. The sensitivity of LCCs to errors in determination of position coordinates of surface features forming the local calibration structure (LCS) is eliminated by performing multiple repeated measurements followed by building regression surfaces. There are no principle restrictions on the number of repeated LCS measurements. Possessing the calibration database enables correcting in one procedure all the spatial distortions caused by nonlinearity, nonorthogonality and spurious cro...

Lapshin, Rostislav V

2015-01-01T23:59:59.000Z

288

Calculation of the microscopic parameters of a self-induced transparency modelocked quantum cascade laser  

Science Journals Connector (OSTI)

A model to calculate the microscopic parameters of self-induced transparency (SIT) modelocked quantum cascade lasers (QCLs) is presented and the parameters are then calculated for a particular structure. These parameters are then used to calculate the gain to absorption ratio that is required to determine the required ratio of gain periods to absorbing periods that must be grown in order to obtain stable modelocked pulses. The modelocked pulse parameters, along with the stability limits are then calculated as the ratio of gain to absorption varies. For the SIT modelocked QCL design that we examined, we found that three to five gain periods must be grown for each absorbing period in order to ensure stable operation.

Muhammad Anisuzzaman Talukder; Curtis R. Menyuk

2013-01-01T23:59:59.000Z

289

Interacting dark energy: the role of microscopic feedback in the dark sector  

E-Print Network [OSTI]

We investigate the impact on the classical dynamics of dark matter particles and dark energy of a non-minimal coupling in the dark sector, assuming that the mass of the dark matter particles is coupled to a dark energy scalar field. We show that standard results can only be recovered if the space-time variation of the dark energy scalar field is sufficiently smooth on the characteristic length scale of the dark matter particles, and we determine the associated constraint dependent on both the mass and radius of the dark matter particles and the coupling to the dark energy scalar field. We further show, using field theory numerical simulations, that a violation of such constraint results in a microscopic feedback effect strongly affecting the dynamics of dark matter particles, with a potential impact on structure formation and on the space-time evolution of the dark energy equation of state.

Avelino, P P

2015-01-01T23:59:59.000Z

290

Two-neutron correlations in microscopic wave functions of He-6, He-8 and C-12  

E-Print Network [OSTI]

Two-neutron densities obtained from microscopic wave functions of $^6$He and $^8$He are investigated to reveal di-neutron correlations. In particular, the comparison of the two-neutron density with the product of one-neutron densities is useful for a quantitative discussion of di-neutron correlations. The calculations show that the S=0 spatial two-neutron correlation increases at the surface of $^6$He$(0^+_1)$ and $^8$He$(0^+_2)$. The enhancement is remarkable in the $^6$He$(0^+_1)$ ground state but not as prominent in the $^8$He$(0^+_1)$ ground state. Configuration mixing of many Slater determinants is essential to describe the di-neutron correlations. Two-neutron densities in $^{12}$C wave functions with $\\alpha$-cluster structures are also studied.

Yoshiko Kanada-En'yo; Hans Feldmeier; Tadahiro Suhara

2011-07-28T23:59:59.000Z

291

Construction of a Dilution Refrigerator Based Ultra-Low Temperature Scanning Tunneling Microscope  

Science Journals Connector (OSTI)

We constructed a dilution refrigerator based ultra-low temperature scanning tunneling microscope (ULT-STM) which works at temperatures down to 20 mK, in magnetic fields up to 6 T and in ultrahigh vacuum (UHV). One can load samples/tips, which are prepared in a UHV chamber, to an STM head maintaining the low temperature and UHV conditions. After then they can be cooled back to the base temperature in several hours. We report results of a test measurement on a superconducting NbSe2 sample as well as recent STM/STS studies on graphite samples such as observations of the Landau quantization and visualization of the possible localized states in magnetic fields.

Hiroshi Kambara; Tomohiro Matsui; Yasuhiro Niimi; Hiroshi Fukuyama

2006-01-01T23:59:59.000Z

292

Laser apparatus and method for microscopic and spectroscopic analysis and processing of biological cells  

DOE Patents [OSTI]

An apparatus and method for microscopic and spectroscopic analysis and processing of biological cells. The apparatus comprises a laser having an analysis region within the laser cavity for containing one or more biological cells to be analyzed. The presence of a cell within the analysis region in superposition with an activated portion of a gain medium of the laser acts to encode information about the cell upon the laser beam, the cell information being recoverable by an analysis means that preferably includes an array photodetector such as a CCD camera and a spectrometer. The apparatus and method may be used to analyze biomedical cells including blood cells and the like, and may include processing means for manipulating, sorting, or eradicating cells after analysis thereof.

Gourley, Paul L. (12508 Loyola, NE., Albuquerque, NM 87112); Gourley, Mark F. (7509 Spring Lake Dr., Apt. B1, Bethesda, MD 20817)

1997-01-01T23:59:59.000Z

293

Laser apparatus and method for microscopic and spectroscopic analysis and processing of biological cells  

DOE Patents [OSTI]

An apparatus and method are disclosed for microscopic and spectroscopic analysis and processing of biological cells. The apparatus comprises a laser having an analysis region within the laser cavity for containing one or more biological cells to be analyzed. The presence of a cell within the analysis region in superposition with an activated portion of a gain medium of the laser acts to encode information about the cell upon the laser beam, the cell information being recoverable by an analysis means that preferably includes an array photodetector such as a CCD camera and a spectrometer. The apparatus and method may be used to analyze biomedical cells including blood cells and the like, and may include processing means for manipulating, sorting, or eradicating cells after analysis. 20 figs.

Gourley, P.L.; Gourley, M.F.

1997-03-04T23:59:59.000Z

294

Study of microscopic structure of porous media - fine coal filter cakes  

SciTech Connect (OSTI)

The macroscopic properties of the porous media, e.g., permeability, capillary pressure, relative permeability, depend upon the microscopic structure of the porous medium. In the coal preparation plants, the filtration and dewatering rates of the fine coal filter cakes are important in determining the final moisture content. The microscopic structure of the porous coal filter cakes plays an important role in these operations. Moreover, the two phase flow through the porous medium can be explained in detail by considering its pore structure. Hence, the development of a technique for the micro-structural analysis of unconsolidated coal filter cakes is investigated. The technique developed is also applicable to many consolidated porous media like sandstones, rocks, etc. Optical methods were utilized to study the micro-structure of fine coal cakes. The investigation of -32 mesh Pittsburgh seam coal cakes reveals a non-uniform structure at low solid concentration of 0.33 kg coal/kg water. An increase in the solid concentration in the slurry produces a more uniform structure with an increase in the filtration and dewatering rates. It was found that coal filter cakes are incompressible over the range of 28 to 67 kPa applied vacuum. An important aspect of this work was to provide quantitative information about the presence of air bubbles in the coal filter cakes. These air bubbles are evolved from the aerated slurry and they reduce the filtration rates. A linear correlation between the particle and pore size distribution of -32 mesh Pittsburgh coal was found.

Kakwani, R.M.

1983-01-01T23:59:59.000Z

295

Hershey-Chase experiment  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Hershey-Chase experiment Hershey-Chase experiment Name: pei01 Location: N/A Country: N/A Date: N/A Question: I would like to know the characteristics of Griffth's experiment, and Hershey-Chase experiment. Replies: For the H-C experiment: It was designed to show that the type of virus known as a bacteriophage infected bacteria by injecting its DNA, and not by incorporating the entire virus into the bacterium. This was important because it showed that the entire replication of the virus could be coded for in the DNA of the virus, and not in the coat protein. They labeled with radioactivity the coat of the virus using one type of label 35-S, and the DNA with another, 32-P and then infected bacteria. After infection, the bacteria contained only 32-P, and no 35-S. The viruses went on to destroy the bacteria and reproduce, and the new viruses contained no 35-S in their coats. Source: Biology, 3rd ed., by Solomon et al., although the same information is in almost all texts at the college level

296

AGS experiments, 1988, 1989, 1990  

SciTech Connect (OSTI)

This report contains: experimental areas layout; table of beam parameters and fluxes; experiment schedule as run''; experiment long range schedule; a listing of experiments by number; two-page summaries of each experiment begin here, also ordered by number; publications of AGS experiments; and list of experimenters.

Depken, J.C.

1991-04-01T23:59:59.000Z

297

A demonstration mobility experiment  

E-Print Network [OSTI]

Corporation, Albuquerque& New Nhxico& for his assl. stance and advice in the preparation of the crystslsl snd my wife, Ellen, who corrected gram&asr& typed, proofread& and offered sncouragesmnt throughout the comple- tion of this thesis, I I I 8 I w... Shockley Haynes mobil. ty experiment. Tp Fig, 2. Sketch of oscilloscope trace from asr1y version of tha Shoo'klay Hagrnes momlity experiment, drift toward the eollsotor point with e velocity~? whereMLO the h ~ ability of a boles Ths Current tlsw...

Martin, Howard Lawrence

1961-01-01T23:59:59.000Z

298

Venus Fly Trap Experiment  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Venus Fly Trap Experiment Venus Fly Trap Experiment Name: Jeremy Bailey Status: N/A Age: N/A Location: N/A Country: N/A Date: N/A Question: My name is Jeremy Bailey, and I am a student of Dorseyville Middle School. I have been working on a science project about Venus' Fly Traps. A recent addition to the project involved designing an experiment about something I found interesting about them. However, I don't know where to get them or how to grow them in the moderate climate of Pittsburgh. Also, I don't know how a successful experiment could be designed. Replies: Jeremy, I believe Venus Fly traps can be found 'in the wild' in the coastal floodplain of the Carolinas. As far as where to buy them, look in the phonebook yellow pages under plants or houseplants and do some calling. I live in eastern Pennsylvania, and over here they even sell them in hardware stores like Hechinger's and Home Depot (in their garden departments). I don't think you will have luck trying to grow them outside, our winters here are a bit too harsh for them. From what I recall they require substantial moisture and more moderate climes. You might try looking for houseplant books at your local library for more detailed information.

299

ATA beam director experiment  

SciTech Connect (OSTI)

This report describes beam director elements for an experiment at the Advanced Test Accelerator. The elements described include a vernier magnet for beam aiming, an achromat magnet, and an isolation system for the beam interface. These components are built at small scale for concept testing. (JDH)

Lee, E.P.; Younger, F.C.; Cruz, G.E.; Nolting, E.

1986-06-23T23:59:59.000Z

300

The MAJORANA Experiment  

SciTech Connect (OSTI)

The Majorana Collaboration is assembling an array of HPGe detectors to search for neutrinoless double-beta decay in {sup 76}Ge. Initially, Majorana aims to construct a prototype module to demonstrate the potential of a future 1-tonne experiment. The design and potential reach of this prototype Demonstrator module are presented.

Guiseppe, V.E. [Univ S Dakota; Keller, C. [Univ S Dakota; Mei, D-M [Univ S Dakota; Perevozchikov, O. [Univ S Dakota; Perumpilly, G. [Univ S Dakota; Thomas, K. [Univ S Dakota; Xiang, W. [Univ S Dakota; Zhang, C. [Univ S Dakota; Aalseth, C.E. [Pacific NW Natl Lab Richland, WA; Aguayo, E. [Pacific NW Natl Lab Richland, WA; Ely, J. [Pacific NW Natl Lab Richland, WA; Fast, J.E. [Pacific NW Natl Lab Richland, WA; Hoppe, E.W. [Pacific NW Natl Lab Richland, WA; Hossbach, T.W. [Pacific NW Natl Lab Richland, WA; Keillor, M. [Pacific NW Natl Lab Richland, WA; Kephart, J.D. [Pacific NW Natl Lab Richland, WA; Kouzes, R. [Pacific NW Natl Lab Richland, WA; Miley, H.S. [Pacific NW Natl Lab Richland, WA; Mizouni, L. [Pacific NW Natl Lab Richland, WA; Myers, A.W. [Pacific NW Natl Lab Richland, WA; Reid, D. [Pacific NW Natl Lab Richland, WA; Amman, M. [Lawrence Berkeley National Laboratory (LBNL); Bergevin, M. [Lawrence Berkeley National Laboratory (LBNL); Chan, Y-D [Lawrence Berkeley National Laboratory (LBNL); Detwiler, J.A. [Lawrence Berkeley National Laboratory (LBNL); Loach, J.C. [Lawrence Berkeley National Laboratory (LBNL); Luke, P.N. [Lawrence Berkeley National Laboratory (LBNL); Martin, R.D. [Lawrence Berkeley National Laboratory (LBNL); Poon, A.W.P. [Lawrence Berkeley National Laboratory (LBNL); Prior, G. [Lawrence Berkeley National Laboratory (LBNL); Vetter, K. [Lawrence Berkeley National Laboratory (LBNL); Yaver, H. [Lawrence Berkeley National Laboratory (LBNL); Avignone, F.T. III [University of South Carolina; Creswick, R. [University of South Carolina; Farach, H. [University of South Carolina; Mizouni, L. [University of South Carolina; Avignone, Frank Titus [ORNL; Bertrand Jr, Fred E [ORNL; Capps, Gregory L [ORNL; Cooper, Reynold J [ORNL; Radford, David C [ORNL; Varner Jr, Robert L [ORNL; Wilkerson, John F [University of North Carolina, Chapel Hill; Yu, Chang-Hong [ORNL; Back, H.O. [University of North Carolina; Leviner, L. [North Carolina State University; Young, A.R. [North Carolina State University; Back (et al.), H.O. [Triangle Universities Nuclear Laboratory, Durham, NC; Bai, X. [South Dakota School of Mines and Technology; Hong, H. [South Dakota School of Mines and Technology; Howard, S. [South Dakota School of Mines and Technology; Medlin, D. [South Dakota School of Mines and Technology; Sobolev, V. [South Dakota School of Mines and Technology; Barabash, A.S. [Inst Theort & Expt Phys, Moscow, Russia; Konovalov, S.I. [Inst Theort & Expt Phys, Moscow, Russia; Vanyushin, I. [Inst Theort & Expt Phys, Moscow, Russia; Yumatov, V. [Inst Theort & Expt Phys, Moscow, Russia; Barbeau, P.S. [University of Chicago; Collar, J.I. [University of Chicago; Fields, N. [University of Chicago; Boswell (et al.), M. [Los Alamos National Laboratory (LANL); Brudanin, V. [Joint Institute for Nuclear Research, Dubna, Russia; Egorov, V. [Joint Institute for Nuclear Research, Dubna, Russia; Gusey, K. [Joint Institute for Nuclear Research, Dubna, Russia; Kochetov, O. [Joint Institute for Nuclear Research, Dubna, Russia; Shirchenko, M. [Joint Institute for Nuclear Research, Dubna, Russia; Timkin, V. [Joint Institute for Nuclear Research, Dubna, Russia; Yakushev, E. [Joint Institute for Nuclear Research, Dubna, Russia; Bugg, W. [University of Tennessee, Knoxville (UTK); Efremenko, M. [University of Tennessee, Knoxville (UTK); Burritt (et al.), T.H. [University of Washington, Ctr Expt Nucle Phys & Astrophys; Burritt (et al.), T.H. [University of Washington, Dept Phys, Seattle, WA; Busch, M. [Duke University; Esterline, J. [Duke University; Swift, G. [Duke University; Tornow, W. [Duke University/TUNL; Ejiri, H. [Osaka University; Hazama, R. [Osaka University; Nomachi, M. [Osaka University; Shima, T. [Osaka University; Finnerty (et al.), P. [University of North Carolina; et al.

2011-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "microscopic double-slit experiment" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


301

FLORIDA TOWER FOOTPRINT EXPERIMENTS  

SciTech Connect (OSTI)

The Florida Footprint experiments were a series of field programs in which perfluorocarbon tracers were released in different configurations centered on a flux tower to generate a data set that can be used to test transport and dispersion models. These models are used to determine the sources of the CO{sub 2} that cause the fluxes measured at eddy covariance towers. Experiments were conducted in a managed slash pine forest, 10 km northeast of Gainesville, Florida, in 2002, 2004, and 2006 and in atmospheric conditions that ranged from well mixed, to very stable, including the transition period between convective conditions at midday to stable conditions after sun set. There were a total of 15 experiments. The characteristics of the PFTs, details of sampling and analysis methods, quality control measures, and analytical statistics including confidence limits are presented. Details of the field programs including tracer release rates, tracer source configurations, and configuration of the samplers are discussed. The result of this experiment is a high quality, well documented tracer and meteorological data set that can be used to improve and validate canopy dispersion models.

WATSON,T.B.; DIETZ, R.N.; WILKE, R.; HENDREY, G.; LEWIN, K.; NAGY, J.; LECLERC, M.

2007-01-01T23:59:59.000Z

302

The Majorana Experiment  

E-Print Network [OSTI]

The Majorana Collaboration is assembling an array of HPGe detectors to search for neutrinoless double-beta decay in Ge-76. Initially, Majorana aims to construct a prototype module to demonstrate the potential of a future 1-tonne experiment. The design and potential reach of this prototype Demonstrator module are presented.

V. E. Guiseppe; for the Majorana Collaboration

2010-12-30T23:59:59.000Z

303

Overview of CHS experiments  

Science Journals Connector (OSTI)

Recent experimental results are summarized. One of them is the bifurcation phenomenon of the electric potential which manifests itself in various aspects of CHS plasmas. Here, electrons heated with ECH play an essential role. The CHS will be operated, after being moved to the Toki site, so as to perform complementary experiments to LHD.

K Matsuoka; R Akiyama; A Fujisawa; K Ida; H Iguchi; M Isobe; S Kado; K Khlopenkov; T Kondo; Y Liang; G Matsunaga; T Minami; S Nishimura; I Nomura; K Ohkuni; S Okamura; M Osakabe; R Pavlichenko; M Sasao; A Shimizu; S Sudo; C Suzuki; C Takahashi; S Takagi; M Takechi; K Tanaka; K Toi; T Yamamoto; Y Yoshimura

2000-01-01T23:59:59.000Z

304

THE ARGUS EXPERIMENT  

Science Journals Connector (OSTI)

...first experiment which occurred to me stemmed out of my main field of endeavor in the last five years, namely, the Astron thermonuclear device. In this device it is contemplated to establish a cylindrical layer of relativistic electrons between two mirror...

N. C. Christofilos

1959-01-01T23:59:59.000Z

305

A way to higher resolution: spherical-aberration correction in a 200 kV transmission electron microscope  

Science Journals Connector (OSTI)

......micrographs, ultramicroscopy 15: 151-172. rical pole-piece dimensions. The 200 kV spherical-aberra- 8 Thust A, Overwijk M H F, coene w M J. and Lentzen M (1996) tion-COrreCted microscope avoids the radiation damage Numerical correction of......

Knut Urban; Bernd Kabius; Max Haider; Harald Rose

1999-01-01T23:59:59.000Z

306

Electron microscopic investigations and indexing studies of psorosis and citrus ringspot virus of citrus / by Margaret Atchison Barkley  

E-Print Network [OSTI]

on 2%%u uranyl acetate for 5 minutes and on lead citrate for 1 minute. Two to three grids were made from each cap- sule. A11 sections were examined with a Hitachi HS-7S electron microscope. 14 CHAPTER IV RESULTS AND DISCUSSION During the spring...

Barkley, Margaret Atchison

1979-01-01T23:59:59.000Z

307

Measuring charge trap occupation and energy level in CdSe/ZnS quantum dots using a scanning tunneling microscope  

E-Print Network [OSTI]

We use a scanning tunneling microscope to probe single-electron charging phenomena in individual CdSe/ZnS (core/shell) quantum dots (QDs) at room temperature. The QDs are deposited on top of a bare Au thin film and form a ...

Bulovic, Vladimir

308

Sample mounting and transfer for coupling an ultrahigh vacuum variable temperature beetle scanning tunneling microscope with conventional surface probes  

SciTech Connect (OSTI)

We present a new ultrahigh vacuum (UHV) chamber for surface analysis and microscopy at controlled, variable temperatures. The new instrument allows surface analysis with Auger electron spectroscopy, low energy electron diffraction, quadrupole mass spectrometer, argon ion sputtering gun, and a variable temperature scanning tunneling microscope (VT-STM). In this system, we introduce a novel procedure for transferring a sample off a conventional UHV manipulator and onto a scanning tunneling microscope in the conventional ''beetle'' geometry, without disconnecting the heating or thermocouple wires. The microscope, a modified version of the Besocke beetle microscope, is mounted on a 2.75 in. outer diameter UHV flange and is directly attached to the base of the chamber. The sample is attached to a tripod sample holder that is held by the main manipulator. Under UHV conditions the tripod sample holder can be removed from the main manipulator and placed onto the STM. The VT-STM has the capability of acquiring images between the temperature range of 180--500 K. The performance of the chamber is demonstrated here by producing an ordered array of island vacancy defects on a Pt(111) surface and obtaining STM images of these defects.

Nafisi, Kourosh; Ranau, Werner; Hemminger, John C.

2001-01-01T23:59:59.000Z

309

Scanning tunneling microscope tip as a positionable contact: Probing a Josephson-junction array at subkelvin temperatures  

E-Print Network [OSTI]

Scanning tunneling microscope tip as a positionable contact: Probing a Josephson-junction arrayK. The STM enables us to probe the structure, a Josephson-junction array, at various positions. Examples of such systems are two- dimensional electron gases and Josephson junction arrays.1

310

Microscopic model of critical current noise in Josephson-junction qubits: Subgap resonances and Andreev bound states  

E-Print Network [OSTI]

Microscopic model of critical current noise in Josephson-junction qubits: Subgap resonances in Josephson junctions based on individual trapping centers in the tunnel-barrier hybridized with electrons microresonators observed in Josephson-junction qubits R. W. Simmonds et al., Phys. Rev. Lett. 93, 077003 2004

von Delft, Jan

311

Microscope maps the graphene terrain A. E. Curtin, W. G. Cullen, M. S. Fuhrer, (Maryland MRSEC DMR 0520471)  

E-Print Network [OSTI]

Microscope maps the graphene terrain A. E. Curtin, W. G. Cullen, M. S. Fuhrer, (Maryland MRSEC DMR in the electrical potential on the surface of graphene on silicon carbide, shown here as different colors. KPM identifies single layer graphene (SLG), bilayer graphene (BLG), and two types of interfacial layer (IL1

Shapiro, Benjamin

312

Traffic operational characteristics at all-way-stop-controlled intersections were investigated by using AWSIM, a microscopic simulation model. The  

E-Print Network [OSTI]

by using AWSIM, a microscopic simulation model. The effects of vehicle arrival distribution and traffic- neers for the purpose of design and operational studies. Simulation models provide alternative means for transportation studies when analytical models cannot provide satisfactory solutions. Although several simulation

Tian, Zong Z.

313

ORISE: Graduate Student Research Experiences  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Graduate Student Research Experiences The Oak Ridge Institute for Science and Education (ORISE) provides well-rounded laboratory experiences that expand graduate students'...

314

POLARIZED TARGET EXPERIMENT AT FERMILAB  

E-Print Network [OSTI]

on Experiment 61 at Fermilab, which is a large collaborationBernie Sandler, From From Fermilab. Alan Jonckheere andTARGET EXPERIMENT AT FERMILAB Owen Chamberlain January 1977

Chamberlain, O.

2010-01-01T23:59:59.000Z

315

WETTABILITY AND IMBIBITION: MICROSCOPIC DISTRIBUTION OF WETTING AND ITS CONSEQUENCES AT THE CORE AND FIELD SCALES  

SciTech Connect (OSTI)

The questions of reservoir wettability have been approached in this project from three directions. First, we have studied the properties of crude oils that contribute to wetting alteration in a reservoir. A database of more than 150 different crude oil samples has been established to facilitate examination of the relationships between crude oil chemical and physical properties and their influence on reservoir wetting. In the course of this work an improved SARA analysis technique was developed and major advances were made in understanding asphaltene stability including development of a thermodynamic Asphaltene Solubility Model (ASM) and empirical methods for predicting the onset of instability. The CO-Wet database is a resource that will be used to guide wettability research in the future. The second approach is to study crude oil/brine/rock interactions on smooth surfaces. Contact angle measurements were made under controlled conditions on mica surfaces that had been exposed to many of the oils in the CO-Wet database. With this wealth of data, statistical tests can now be used to examine the relationships between crude oil properties and the tendencies of those oils to alter wetting. Traditionally, contact angles have been used as the primary wetting assessment tool on smooth surfaces. A new technique has been developed using an atomic forces microscope that adds a new dimension to the ability to characterize oil-treated surfaces. Ultimately we aim to understand wetting in porous media, the focus of the third approach taken in this project. Using oils from the CO-Wet database, experimental advances have been made in scaling the rate of imbibition, a sensitive measure of core wetting. Application of the scaling group to mixed-wet systems has been demonstrated for a range of core conditions. Investigations of imbibition in gas/liquid systems provided the motivation for theoretical advances as well. As a result of this project we have many new tools for studying wetting at microscopic and macroscopic scales and a library of well-characterized fluids for use in studies of crude oil/brine/rock interactions.

Jill S. Buckley; Norman R. Morrow; Chris Palmer; Purnendu K. Dasgupta

2003-02-01T23:59:59.000Z

316

73Nanowear of atomic force microscope tips: Modeling and experiments Corresponding author: Nicola M. Pugno, e-mail: nicola.pugno@polito.it  

E-Print Network [OSTI]

and experimentally validated. The model is based on the assumption that the energy consumed to remove the unit volume with material transformation. Their energy- based model was then based on the assumption that the energy is plausible and, more importantly, that the specific energy is close to the material strength

Espinosa, Horacio D.

317

ORISE: Faculty Research Experiences  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Faculty Research Experiences Faculty Research Experiences The Oak Ridge Institute for Science and Education (ORISE) provides short- and long-term programs for either faculty or faculty-student teams to collaborate with ORISE's science and engineering partners. The length of the faculty programs can vary-from summer internships to year-long sabbaticals-but all programs enable faculty members to broaden their professional outlook beyond the classroom to the application of laboratory research. For example, these researchers have taken advantage of ORISE opportunities: Dr. Miguel Castro Dr. Miguel Castro Dr. Miguel Castro, of the University of Puerto Rico in Mayaguez, spent three months conducting research on surface tension in Oak Ridge National Laboratory's Faculty Student Team Research program.

318

Gross decontamination experiment report  

SciTech Connect (OSTI)

A Gross Decontamination Experiment was conducted on various levels and surfaces of the TMI - Unit 2 reactor building in March 1982. The polar crane, D-rings, missile shields, refueling canals, refueling bridges, equipment, and elevations 305' and 347'-6'' were flushed with low pressure water. Additionally, floor surfaces on elevation 305' and floor surfaces and major pieces of equipment on elevation 347'-6'' were sprayed with high pressure water. Selective surfaces were decontaminated with a mechanical scrubber and chemicals. Strippable coating was tested and evaluated on equipment and floor surfaces. The effectiveness, efficiency, and safety of several decontamination techniques were established for the large, complex decontamination effort. Various decontamination equipment was evaluated and its effectiveness was documented. Decontamination training and procedures were documented and evaluated, as were the support system and organization for the experiment.

Mason, R.; Kinney, K.; Dettorre, J.; Gilbert, V.

1983-07-01T23:59:59.000Z

319

Electronics for Satellite Experiments  

SciTech Connect (OSTI)

The tracking detector for the LAT science instrument on the GLAST mission is an example of a large-scale particle detection system built primarily by particle physicists for space flight within the context of a NASA program. The design and fabrication model in most ways reflected practice and experience from particle physics, but the quality assurance aspects were guided by NASA. Similarly, most of the electronics in the LAT as a whole were designed and built by staff at a particle physics lab. This paper reports on many of the challenges and lessons learned in the experience of designing and building the tracking detector and general LAT electronics for use in the NASA GLAST mission.

Johnson, Robert P.; /UC, Santa Cruz

2006-05-16T23:59:59.000Z

320

2013 R&D 100 Award: Movie-mode electron microscope captures nanoscale  

ScienceCinema (OSTI)

A new instrument developed by LLNL scientists and engineers, the Movie Mode Dynamic Transmission Electron Microscope (MM-DTEM), captures billionth-of-a-meter-scale images with frame rates more than 100,000 times faster than those of conventional techniques. The work was done in collaboration with a Pleasanton-based company, Integrated Dynamic Electron Solutions (IDES) Inc. Using this revolutionary imaging technique, a range of fundamental and technologically important material and biological processes can be captured in action, in complete billionth-of-a-meter detail, for the first time. The primary application of MM-DTEM is the direct observation of fast processes, including microstructural changes, phase transformations and chemical reactions, that shape real-world performance of nanostructured materials and potentially biological entities. The instrument could prove especially valuable in the direct observation of macromolecular interactions, such as protein-protein binding and host-pathogen interactions. While an earlier version of the technology, Single Shot-DTEM, could capture a single snapshot of a rapid process, MM-DTEM captures a multiframe movie that reveals complex sequences of events in detail. It is the only existing technology that can capture multiple electron microscopy images in the span of a single microsecond.

Lagrange, Thomas; Reed, Bryan

2014-07-21T23:59:59.000Z

Note: This page contains sample records for the topic "microscopic double-slit experiment" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


321

Microscopic Description of Entanglements in Polyethylene Networks and Melts: Strong, Weak, Pairwise, and Collective Attributes  

E-Print Network [OSTI]

We present atomistic molecular dynamics simulations of two Polyethylene systems where all entanglements are trapped: a perfect network, and a melt with grafted chain ends. We examine microscopically at what level topological constraints can be considered as a collective entanglement effect, as in tube model theories, or as certain pairwise uncrossability interactions, as in slip-link models. A pairwise parameter, which varies between these limiting cases, shows that, for the systems studied, the character of the entanglement environment is more pairwise than collective. We employ a novel methodology, which analyzes entanglement constraints into a complete set of pairwise interactions, similar to slip links. Entanglement confinement is assembled by a plethora of links, with a spectrum of confinement strengths, from strong to weak. The strength of interactions is quantified through a link `persistence', which is the fraction of time for which the links are active. By weighting links according to their strength, we show that confinement is imposed mainly by the strong ones, and that the weak, trapped, uncrossability interactions cannot contribute to the low frequency modulus of an elastomer, or the plateau modulus of a melt. A self-consistent scheme for mapping topological constraints to specific, strong binary links, according to a given entanglement density, is proposed and validated. Our results demonstrate that slip links can be viewed as the strongest pairwise interactions of a collective entanglement environment. The methodology developed provides a basis for bridging the gap between atomistic simulations and mesoscopic slip link models.

Stefanos D. Anogiannakis; Christos Tzoumanekas; Doros N. Theodorou

2013-01-30T23:59:59.000Z

322

2013 R&D 100 Award: Movie-mode electron microscope captures nanoscale  

SciTech Connect (OSTI)

A new instrument developed by LLNL scientists and engineers, the Movie Mode Dynamic Transmission Electron Microscope (MM-DTEM), captures billionth-of-a-meter-scale images with frame rates more than 100,000 times faster than those of conventional techniques. The work was done in collaboration with a Pleasanton-based company, Integrated Dynamic Electron Solutions (IDES) Inc. Using this revolutionary imaging technique, a range of fundamental and technologically important material and biological processes can be captured in action, in complete billionth-of-a-meter detail, for the first time. The primary application of MM-DTEM is the direct observation of fast processes, including microstructural changes, phase transformations and chemical reactions, that shape real-world performance of nanostructured materials and potentially biological entities. The instrument could prove especially valuable in the direct observation of macromolecular interactions, such as protein-protein binding and host-pathogen interactions. While an earlier version of the technology, Single Shot-DTEM, could capture a single snapshot of a rapid process, MM-DTEM captures a multiframe movie that reveals complex sequences of events in detail. It is the only existing technology that can capture multiple electron microscopy images in the span of a single microsecond.

Lagrange, Thomas; Reed, Bryan

2014-04-03T23:59:59.000Z

323

Microscopic mechanisms of metastable phase formation during ball milling of intermetallic TiAl phases  

SciTech Connect (OSTI)

Powders of the intermetallic equilibrium phases {alpha}{sub 2}-Ti{sub 3}Al, {gamma}-TiAl and TiAl{sub 3} were ball milled in order to investigate the microscopic origins of the energetic destabilization and the transformation into metastable phases during the milling process. It was found that the intermetallic phases were chemically partially disordered on milling followed by the transformation into solid solution phases after long milling. In detail, for the {gamma} phase, the formation of numerous deformation twins, thin h.c.p. lamellae and lamellae of the 9R phase formed by an antitwin operation was observed by TEM. The disordering of the D0{sub 22}-TiAl{sub 3} phase occurred inhomogeneously in the material via the formation of antiphase boundaries on (001) planes, resulting in a f.c.c. solid solution in the final state. In summary, it can be concluded that the formation of the observed metastable phases results from chemical disordering, whereas the excess enthalpy of grain boundaries plays only a minor role for the energetical destabilization of the intermetallic compounds during milling in this case.

Klassen, T.; Oehring, M.; Bormann, R. [GKSS Research Centre, Geesthacht (Germany)] [GKSS Research Centre, Geesthacht (Germany)

1997-09-01T23:59:59.000Z

324

Microscopic self-energy calculations and dispersive optical-model potentials  

E-Print Network [OSTI]

Nucleon self-energies for 40Ca, 48Ca, 60Ca isotopes are generated with the microscopic Faddeev-random-phase approximation (FRPA). These self-energies are compared with potentials from the dispersive optical model (DOM) that were obtained from fitting elastic-scattering and bound-state data for 40Ca and 48Ca. The \\textit{ab initio} FRPA is capable of explaining many features of the empirical DOM potentials including their nucleon asymmetry dependence. The comparison furthermore provides several suggestions to improve the functional form of the DOM potentials, including among others the exploration of parity and angular momentum dependence. The non-locality of the FRPA imaginary self-energy, illustrated by a substantial orbital angular momentum dependence, suggests that future DOM fits should consider this feature explicitly. The roles of the nucleon-nucleon tensor force and charge-exchange component in generating the asymmetry dependence of the FPRA self-energies are explored. The global features of the FRPA self-energies are not strongly dependent on the choice of realistic nucleon-nucleon interaction.

S. J. Waldecker; C. Barbieri; W. H. Dickhoff

2011-05-21T23:59:59.000Z

325

Model-independent quantitative measurement of nanomechanical oscillator vibrations using electron-microscope linescans  

SciTech Connect (OSTI)

Nanoscale mechanical resonators are highly sensitive devices and, therefore, for application as highly sensitive mass balances, they are potentially superior to micromachined cantilevers. The absolute measurement of nanoscale displacements of such resonators remains a challenge, however, since the optical signal reflected from a cantilever whose dimensions are sub-wavelength is at best very weak. We describe a technique for quantitative analysis and fitting of scanning-electron microscope (SEM) linescans across a cantilever resonator, involving deconvolution from the vibrating resonator profile using the stationary resonator profile. This enables determination of the absolute amplitude of nanomechanical cantilever oscillations even when the oscillation amplitude is much smaller than the cantilever width. This technique is independent of any model of secondary-electron emission from the resonator and is, therefore, applicable to resonators with arbitrary geometry and material inhomogeneity. We demonstrate the technique using focussed-ion-beam–deposited tungsten cantilevers of radius ?60–170 nm inside a field-emission SEM, with excitation of the cantilever by a piezoelectric actuator allowing measurement of the full frequency response. Oscillation amplitudes approaching the size of the primary electron-beam can be resolved. We further show that the optimum electron-beam scan speed is determined by a compromise between deflection of the cantilever at low scan speeds and limited spatial resolution at high scan speeds. Our technique will be an important tool for use in precise characterization of nanomechanical resonator devices.

Wang, Huan; Fenton, J. C.; Chiatti, O. [London Centre for Nanotechnology, University College London, 17–19 Gordon Street, London WC1H 0AH (United Kingdom)] [London Centre for Nanotechnology, University College London, 17–19 Gordon Street, London WC1H 0AH (United Kingdom); Warburton, P. A. [London Centre for Nanotechnology, University College London, 17–19 Gordon Street, London WC1H 0AH (United Kingdom) [London Centre for Nanotechnology, University College London, 17–19 Gordon Street, London WC1H 0AH (United Kingdom); Department of Electronic and Electrical Engineering, University College London, Torrington Place, London WC1E 7JE (United Kingdom)

2013-07-15T23:59:59.000Z

326

Microscopic Theory of Protein Folding Rates.II: Local Reaction Coordinates and Chain Dynamics  

E-Print Network [OSTI]

The motion involved in barrier crossing for protein folding are investigated in terms of the chain dynamics of the polymer backbone, completing the microscopic description of protein folding presented in the previous paper. Local reaction coordinates are identified as collective growth modes of the unstable fluctuations about the saddle-points in the free energy surface. The description of the chain dynamics incorporates internal friction (independent of the solvent viscosity) arising from the elementary isomerizations of the backbone dihedral angles. We find that the folding rate depends linearly on the solvent friction for high viscosity, but saturates at low viscosity because of internal friction. For $\\lambda$-repressor, the calculated folding rate prefactor, along with the free energy barrier from the variational theory, gives a folding rate that agrees well with the experimentally determined rate under highly stabilizing conditions, but the theory predicts too large a folding rate at the transition midpoint. This discrepancy obtained using a fairly complete quantitative theory inspires a new set of questions about chain dynamics, specifically detailed motions in individual contact formation.

John J. Portman; Shoji Takada; Peter G. Wolynes

2000-08-30T23:59:59.000Z

327

Atomic force microscope cantilever spring constant evaluation for higher mode oscillations: A kinetostatic method  

SciTech Connect (OSTI)

Our previous study of the particle mass sensor has shown a large ratio (up to thousands) between the spring constants of a rectangular cantilever in higher mode vibration and at the static bending or natural mode vibration. This has been proven by us through the derived nodal point position equation. That solution is good for a cantilever with the free end in noncontact regime and the probe shifted from the end to an effective section and contacting a soft object. Our further research shows that the same nodal position equation with the proper frequency equations may be used for the same spring constant ratio estimation if the vibrating at higher mode cantilever's free end has a significant additional mass clamped to it or that end is in permanent contact with an elastic or hard measurand object (reference cantilever). However, in the latter case, the spring constant ratio is much smaller (in tens) than in other mentioned cases at equal higher (up to fourth) vibration modes. We also present the spring constant ratio for a vibrating at higher eigenmode V-shaped cantilever, which is now in wide use for atomic force microscopy. The received results on the spring constant ratio are in good (within a few percent) agreement with the theoretical and experimental data published by other researchers. The knowledge of a possible spring constant transformation is important for the proper calibration and use of an atomic force microscope with vibrating cantilever in the higher eigenmodes for measurement and imaging with enlarged resolution.

Tseytlin, Yakov M. [Instrument Society of America, 20 Randall Street, Apt. 5G, Providence, Rhode Island 02904 (United States)

2008-02-15T23:59:59.000Z

328

Scanning electron microscopic study of laser-induced morphologic changes of a coated enamel surface  

SciTech Connect (OSTI)

A low-energy Nd:YAG laser was used to irradiate extracted human teeth coated with a black energy-absorbent laser initiator in a study to determine the extent of the morphologic changes produced in the enamel surface. The laser initiator was applied to a cleaned enamel surface and irradiated at an energy output of 30 mJ or 75 mJ. Both energy levels produced morphologic changes of the surface. There was a sharp line of demarcation between the coated, irradiated area and the surrounding noncoated enamel surface. The scanning electron microscope view at the lower energy level showed that the surface had melted and reformed with numerous small, bubble-like inclusions. The 75 mJ energy level showed individual impact craters with shallow centers and raised edges containing numerous pores and large, bubble-like inclusions. Etching is a dental procedure in which an acid is normally used to remove a thin outer layer of the tooth structure. This is necessary to create a roughened, irregular surface in order to provide mechanical retention for dental restorative materials. The changes produced by the laser in this study suggest a simple, effective, and controlled method of etching the enamel surface of a tooth by altering its surface characteristics.

Hess, J.A. (Univ. of Detroit School of Dentistry, MI (USA))

1990-01-01T23:59:59.000Z

329

Development of a surface conductivity measurement system for ultrahigh vacuum transmission electron microscope  

SciTech Connect (OSTI)

The surface conductivity measurement system using a micro-four-point probe (M4PP) had been developed for the ultrahigh vacuum transmission electron microscope (UHV-TEM). Since the current distribution in the sample crystals during the current voltage measurement by the M4PP is localized within the depth of several micrometers from the surface, the system is sensitive to the surface conductivity, which is related with the surface superstructure. It was installed in the main chamber of the TEM and the surface conductivity can be measured in situ. The surface structures were observed by reflection electron microscopy and diffraction (REM-RHEED). REM-RHEED enables us to observe the surface superstructures and their structure defects such as surface atomic steps and domain boundaries of the surface superstructure. Thus the effects of the defects on the surface conductivity can be investigated. In the present paper we present the surface conductivity measurement system and its application to the Si(111)-{radical}(3)x{radical}(3)-Ag surface prepared on the Si(111) vicinal surfaces. The result clearly showed that the surface conductivity was affected by step configuration.

Minoda, H. [Department of Applied Physics, Tokyo University of Agriculture and Technology, Koganei, Tokyo 184-8588 (Japan); CREST, Japan Science and Technology Agency, Kawaguchi, Saitama 332-0012 (Japan); Hatano, K.; Yazawa, H. [Department of Applied Physics, Tokyo University of Agriculture and Technology, Koganei, Tokyo 184-8588 (Japan)

2009-11-15T23:59:59.000Z

330

A high-pressure atomic force microscope for imaging in supercritical carbon dioxide  

SciTech Connect (OSTI)

A high-pressure atomic force microscope (AFM) that enables in situ, atomic scale measurements of topography of solid surfaces in contact with supercritical CO{sub 2} (scCO{sub 2}) fluids has been developed. This apparatus overcomes the pressure limitations of the hydrothermal AFM and is designed to handle pressures up to 100 atm at temperatures up to ?350 K. A standard optically-based cantilever deflection detection system was chosen. When imaging in compressible supercritical fluids such as scCO{sub 2} , precise control of pressure and temperature in the fluid cell is the primary technical challenge. Noise levels and imaging resolution depend on minimization of fluid density fluctuations that change the fluid refractive index and hence the laser path. We demonstrate with our apparatus in situ atomic scale imaging of a calcite (CaCO{sub 3}) mineral surface in scCO{sub 2}; both single, monatomic steps and dynamic processes occurring on the (10{overbar 1}4) surface are presented. This new AFM provides unprecedented in situ access to interfacial phenomena at solid–fluid interfaces under pressure.

Lea, A.S.; Higgins, S.R.; Knauss, K.G.; Rosso, K.M.

2011-01-15T23:59:59.000Z

331

Condensation of N bosons: Microscopic approach to fluctuations in an interacting Bose gas  

SciTech Connect (OSTI)

We present a microscopic derivation of the master equation for the condensate density matrix for an interacting Bogoliubov-Bose gas of N atoms. We choose the interaction Hamiltonian in a special way that substantially simplifies the master equation, yielding no coupling between diagonal and off-diagonal terms. The present formulation allows us to solve the problem analytically in a steady state and obtain the expression for the distribution function and equilibrium condensate fluctuations. For the first two central moments, our results are equivalent to those obtained in the canonical-ensemble quasiparticle formalism [V. V. Kocharovsky, Vl. V. Kocharovsky, and M. O. Scully, Phys. Rev. Lett. 84, 2306 (2000); Phys. Rev. A 61, 053606 (2000)], in the low-temperature range where these papers are valid, but also give an accurate description at high temperatures. The present analysis for an interacting Bose gas is as accurate as the master equation approach of Kocharovsky et al.[Phys. Rev. A 61, 023609 (2000)] is for an ideal gas.

Svidzinsky, Anatoly A.; Scully, Marlan O. [Texas A and M University, College Station, Texas 77843 (United States) and Princeton University, Princeton, New Jersey 08544 (United States)

2010-12-15T23:59:59.000Z

332

Physics Experiments on NIF  

Broader source: Energy.gov (indexed) [DOE]

work performed under the auspices of the U.S. Department of Energy by Lawrence Livermore National Laboratory under Contract DE-AC52-07NA27344 work performed under the auspices of the U.S. Department of Energy by Lawrence Livermore National Laboratory under Contract DE-AC52-07NA27344 ! LLNL Progress towards Ignition & Weapons Physics Experiments on NIF Presentation to: SEAB October 12, 2011 Ed Moses Director, NIF and Photon Science LLNL-PRES-506751 May 30, 2011 Moses_BOG_92811 NIF has broad array of technical and operational capabilities Moses_BOG_92811 Moses_BOG_92811 Laser bay NIF-0210-18489.ppt Moses presentation to Professor Mohamed Abdou, Neil Morley, Alice Ying, Robert Reed UCLA 5 Moses_All_Hands_100511 We are steadily increasing the laser energy and power available for ignition experiments: fy09 Moses_All_Hands_100511 We are steadily increasing the laser energy and power available for ignition experiments: fy10

333

AGS Experiments: 1989, 1990, 1991  

SciTech Connect (OSTI)

This report contains: Experimental areas layout; table of beam parameters and fluxes; experiment schedule as run''; proposed 1992 schedule; a listing of experiments by number; two-page summaries of each experiment begin here, also ordered by number; publications of AGS Experiments begin here; and list of AGS Experimenters begins here.

Depken, J.C.

1992-02-01T23:59:59.000Z

334

AGS Experiments: 1989, 1990, 1991  

SciTech Connect (OSTI)

This report contains: Experimental areas layout; table of beam parameters and fluxes; experiment schedule ``as run``; proposed 1992 schedule; a listing of experiments by number; two-page summaries of each experiment begin here, also ordered by number; publications of AGS Experiments begin here; and list of AGS Experimenters begins here.

Depken, J.C.

1992-02-01T23:59:59.000Z

335

APS Experiment Safety Review Board  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Charter for the APS Experiment Safety Review Board May 12, 2011 1. Purpose The APS Experiment Safety Review Board (ESRB) advises the AES Division Director on the safe implementation of experiments performed by APS users on the experiment hall floor. The ESRB reviews each experiment that is submitted to the APS via the APS Experiment Safety Assessment System (ESAF). These experiments are conducted in beamline endstations in the APS Experiment Hall. 2. Membership The ESRB members are appointed by the AES Division Director. The current members of the ESRB are: Bruce Glagola AES - Chair Edmund Chang AES Paul Rossi XSD Nena Moonier AES Tom Barkalow PSC Patricia Pedergnana AES Wendy VanWingeren AES 3. Method After an experiment is submitted to the APS Experiment Safety Review system

336

The NEXT experiment  

E-Print Network [OSTI]

NEXT (Neutrino Experiment with a Xenon TPC) is an experiment to search neutrinoless double beta decay processes (bb0nu) in Xe136. The NEXT technology is based in the use of time projection chambers operating at a typical pressure of 15 bar and using electroluminescence to amplify the signal (HPXE). The main advantages of the experimental technique are: a) excellent energy resolution; b) the ability to reconstruct the trajectory of the two electrons emitted in the decays, which further contributes to the suppression of backgrounds; c) scalability to large masses; and d) the possibility to reduce the background to negligible levels thanks to the barium tagging technology (BATA). The NEXT roadmap was designed in four stages: i) Demonstration of the HPXE technology with prototypes deploying a mass of natural xenon in the range of 1 kg, using the NEXT-DEMO (IFIC) and NEXT-DBDM (Berkeley) prototypes; ii) Characterisation of the backgrounds to the bb0nu signal and measurement of the bb2nu signal with the NEW detector, deploying 10 kg of enriched xenon and operating at the LSC; iii) Search for bb0nu decays with the NEXT-100 detector, which deploys 100 kg of enriched xenon; iv) Search for bb0nu decays with the BEXT detector, which will deploy masses in the range of the ton and will introduce two additional handles, only possible in a HPXE: a) A magnetic field, capable of further enhancing the topological signal of NEXT; and b) barium-tagging (a technique pioneered by the EXO experiment which is also accessible to NEXT).

Juan Jose Gomez-Cadenas

2014-11-10T23:59:59.000Z

337

APT radionuclide production experiment  

SciTech Connect (OSTI)

Tritium ({sup 3}H, a heavy isotope of hydrogen) is produced by low energy neutron-induced reactions on various elements. One such reaction is n+{sup 3}He {yields}>{sup 3}H+{sup 1}H in which {sup 3}He is transmuted to tritium. Another reaction, which has been used in reactor production of tritium, is the n+{sup 6}Li {yields}> {sup 3}H+{sup 4}He reaction. Accelerator Production of Tritium relies on a high-energy proton beam to produce these neutrons using the spallation reaction, in which high-energy proton beam to produce these neutrons using the spallation reaction, in which high-energy protons reacting with a heavy nucleus produce a shower of low-energy neutrons and a lower-mass residual nucleus. It is important to quantify the residual radionuclides produced in the spallation target for two reasons. From an engineering point of view, one must understand short-lived isotopes that may contribute to decay heat. From a safety viewpoint, one must understand what nuclei and decay gammas are produced in order to design adequate shielding, to estimate ultimate waste disposal problems, and to predict possible effects due to accidental dispersion during operation. The authors have performed an experiment to measure the production of radioisotopes in stopping-length W and Pb targets irradiated by a 800 MeV proton beam, and are comparing the results to values obtained from calculations using LAHET and MCNP. The experiment was designed to pay particular attention to the short half-life radionuclides, which have not been previously measured. In the following, they present details of the experiment, explain how they analyzed the data and obtain the results, how they perform the calculations, and finally, how the experimental data agree with the calculations.

Ullmann, J.L.; Gavron, A.; King, J.D. [and others

1994-07-02T23:59:59.000Z

338

Microscopic Self-consistent Study of Neon Halos with Resonant Contributions  

SciTech Connect (OSTI)

Recent reaction measurements have been interpreted as evidence of a halo structure in the exotic neutron-rich isotopes 29,31Ne. While theoretical studies of 31Ne generally agree on its halo nature, they differ significantly in their predictions of its properties and underlying cause (e.g., that 31Ne lies in an "island of inversion'"). We have made a systematic theoretical analysis of possible Neon halo signatures -- the first using a fully microscopic, relativistic mean field approach that properly treats positive energy orbitals (such as the valence neutron in 31Ne) self-consistently with bound levels, and that includes the pairing effect that keeps the nucleus loosely bound with negative Fermi energy. Our model is the analytical continuation of the coupling constant (ACCC) method based on a relativistic mean field (RMF) theory with Bardeen-Cooper-Schrieffer (BCS) pairing approximation. We calculate neutron- and matter-radii, one-neutron separation energies, p- and f-orbital energies and occupation probabilities, and neutron densities for single-particle resonant orbitals in 27-31Ne. We analyze these results for evidence of neutron halo formation in 29,31Ne. Our model predicts a p-orbit 1n halo structure for 31Ne, based on a radius increase from 30Ne that is 7 - 8 times larger than the increase from 29Ne to 30Ne, as well as a decrease in the neutron separation energy by a factor of ~ 10 compared to that of 27-30Ne. In contrast to other studies, our inclusion of resonances yields an inverted ordering of p and f orbitals for small deformations. Furthermore, we find no evidence of an s-orbit 1n halo in 29Ne as recently claimed in the literature.

Zhang, Shisheng [ORNL] [ORNL; Smith, Michael Scott [ORNL] [ORNL; Kang, Zhong-Shu [Beihang University, Beijing] [Beihang University, Beijing; Zhao, Jie [Chinese Academy of Sciences, INstitute of Theoretical Physics (ITP)] [Chinese Academy of Sciences, INstitute of Theoretical Physics (ITP)

2014-01-01T23:59:59.000Z

339

Microscopic quantum structure of black hole and vacuum versus quantum statistical origin of gravity  

E-Print Network [OSTI]

The Planckon densely piled model of vacuum is proposed. Based on this model, the microscopic quantum structure of Schwarzschild black hole and quantum statistical origin of its gravity are studied. The cutoff of black hole horizon leads to Casimir effect inside the horizon. This effect makes the inside vacuum has less zero quantum fluctuation energy than that of outside vacuum and the spin 1/2 radiation hole excitations are resulted inside the horizon. The mean energy of the radiation hole excitations is related to the temperature decrease of the Hawking-Unruh type by the period law of the Fermion temperature greens function and a temperature difference as well as gravity are created on the horizon. A dual relation of the gravity potentials between inside and outside regions of the black hole is found. An attractor behaviour of the horizon surface is unveiled. The gravity potential inside the black hole is linear in radial coordinate and no singularity exists at the origin of the black hole, in contrast to the conventional conjecture. All the particles absorbed by the black hole have fallen down to the horizon and converted into spin 1/2 radiation quanta with the mean energy related to the Hawking-Unruh temperature, the thermodynamic equilibrium and the mechanical balance make the radiation quanta be tightly bound in the horizon. The gravitation mass $2M$ and physical mass $M$ of the black hole are calculated. The calculated entropy of the black hole is well consistent with Hawking. Outside the horizon, there exist thermodynamic non-equilibrium and mechanical non-balance which lead to an outward centrifugal energy flow and an inward gravitation energy flow. The lost vacuum energy in the negative gravitation potential region has been removed to the black hole surface to form a spherical Planckon shell with the thickness of Planckon diameter so that energy conservation is guaranteed.

Shun-Jin Wang

2014-10-28T23:59:59.000Z

340

Identification of Fragile Microscopic Structures during Mineral Transformations in Wet Supercritical CO2  

SciTech Connect (OSTI)

In this study we examine the nature of highly fragile reaction products that form in low water content super critical carbon dioxide (scCO2) using a combination of scanning electron microscopy/focus ion beam (SEM/FIB), confocal Raman spectroscopy, helium ion microscopy (HeIM), and transmission electron microscopy (TEM). HeIM images show these precipitates to be fragile rosettes that can readily decompose even under slight heating from an electron beam. Using the TEM revealed details on the interfacial structure between the newly formed surface precipitates and the underlying initial solid phases. The detailed microscopic analysis revealed that the growth of the precipitates either followed a tip growth mechanism with precipitates forming directly on the forsterite surface if the initial solid was non-porous (natural forsterite) or growth from the surface of the precipitates where fluid was conducted through the porous (nanoforsterite) agglomerates to the growth center. The mechanism of formation of the hydrated/hydroxylated magnesium carbonate compound (HHMC) phases offers insight into the possible mechanisms of carbonate mineral formation from scCO2 solutions which has recently received a great deal of attention as the result of the potential for CO2 to act as an atmospheric greenhouse gas and impact overall global warming. The techniques used here to examine these fragile structures an also be used to examine a wide range of fragile material surfaces. SEM and FIB technologies have now been brought together in a single instrument, which represents a powerful combination for the studies in biological, geological and materials science.

Arey, Bruce W.; Kovarik, Libor; Qafoku, Odeta; Wang, Zheming; Hess, Nancy J.; Felmy, Andrew R.

2013-04-01T23:59:59.000Z

Note: This page contains sample records for the topic "microscopic double-slit experiment" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


341

ATLAS APPROVED EXPERIMENTS  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

8MAY98 8MAY98 Exp # Spokesperson Experiment Title Days 433-9 Miller Ion Irradiations of Anisotropic High-Tc Superconductors: Probing Dynamics of Magnetic Vortices 2 651-2 Paul Accelerator-Mass-Spectrometry Measurements of Natural 236U Concentrations with the ECR-ATLAS System 4 667-2 Janssens Unsafe Coulex of the 238,239Pu Nuclei 4 669-2 Carpenter Excited States Associated with Different Shapes in 178Hg and Neighboring Odd-A Nuclei 4 673-2 Lister A Study of Radiative Decay from High Lying States in 24Mg 5 689-2 Freeman Spectroscopy of Odd Tin Isotopes Approaching 100Sn 5 693-2 Reiter Structure and Formation Mechanism of Heavy Elements - Request for additional beam time for Experiment 693 - 6 706 Kwok Heavy-Ion Lithography on High Temperature Superconductors 2 708 Yu In-Beam Spectroscopy Study of the Proton Emitter 109I with Recoil-Decay Tagging Technique

342

HPCToolsExperiences.pptx  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Experiences Experiences w ith T ools a t N ERSC Richard G erber NERSC User Services Programming w eather, c limate, a nd e arth---system m odels on h eterogeneous m ul>---core p la?orms September 7 , 2 011 a t t he N a>onal C enter f or A tmospheric R esearch i n B oulder, C olorado 2 * Thanks f or t he i nvita>on * My p rofessional g oal i s t o e nable s cien>sts t o u se H PC easily a nd e ffec>vely * Contribute t o i mportant d iscoveries a bout h ow o ur natural w orld w orks * Make a d ifference * So i t i s a n h onor & m eaningful t o m e t o p ar>cipate i n this c onference * One o f m y p rimary r oles i s a s d eputy o n o ur n ext procurement t eam & w e a re e xtremely i nterested i n learning a bout y our e xperiences w ith h ybrid s ystems and p rogramming 3 * Recent e xperiences p roviding t ools *

343

The NEXT experiment  

E-Print Network [OSTI]

NEXT (Neutrino Experiment with a Xenon TPC) is an experiment to search neutrinoless double beta decay processes (bb0nu) in Xe136. The NEXT technology is based in the use of time projection chambers operating at a typical pressure of 15 bar and using electroluminescence to amplify the signal (HPXE). The main advantages of the experimental technique are: a) excellent energy resolution; b) the ability to reconstruct the trajectory of the two electrons emitted in the decays, which further contributes to the suppression of backgrounds; c) scalability to large masses; and d) the possibility to reduce the background to negligible levels thanks to the barium tagging technology (BATA). The NEXT roadmap was designed in four stages: i) Demonstration of the HPXE technology with prototypes deploying a mass of natural xenon in the range of 1 kg, using the NEXT-DEMO (IFIC) and NEXT-DBDM (Berkeley) prototypes; ii) Characterisation of the backgrounds to the bb0nu signal and measurement of the bb2nu signal with the NEW detecto...

Gomez-Cadenas, Juan Jose

2014-01-01T23:59:59.000Z

344

Imaging of quantum Hall edge states under quasiresonant excitation by a near-field scanning optical microscope  

SciTech Connect (OSTI)

A high resolution mapping of quantum Hall edge states has been performed by locally creating electrons with small excess energies with a near-field scanning optical microscope in a dilution refrigerator. We have observed fine structures parallel to the edge in photovoltage signals, which appear only at low temperature. The observed fine structures near sample edges have been seen to shift inward with increase in magnetic field in accordance with Chklovskii Shklovskii, and Glazman model.

Ito, H.; Shibata, Y.; Mamyoda, S.; Ootuka, Y.; Nomura, S. [Division of Physics, University of Tsukuba, Tennodai, Tsukuba, 305-8571 (Japan); Kashiwaya, S. [National Institute of Advanced Industrial Science and Technology (AIST), Umezono, Tsukuba, 305-8568 (Japan); Yamaguchi, M.; Akazaki, T.; Tamura, H. [NTT Basic Research Laboratories, NTT Corporation, Morinosato-Wakamiya, Atsugi, 243-0198 (Japan)

2013-12-04T23:59:59.000Z

345

A new Scanning Transmission X-ray Microscope at the ALS for operation up to 2500eV  

SciTech Connect (OSTI)

We report on the design and construction of a higher energy Scanning Transmission X-ray Microscope on a new bend magnet beam line at the Advanced Light Source. Previously we have operated such an instrument on a bend magnet for C, N and O 1s NEXAFS spectroscopy. The new instrument will have similar performance at higher energies up to and including the S 1s edge at 2472eV. A new microscope configuration is planned. A more open geometry will allow a fluorescence detector to count emitted photons from the front surface of the sample. There will be a capability for zone plate scanning in addition to the more conventional sample scanning mode. This will add the capability for imaging a massive sample at high resolution over a limited field of view, so that heavy reaction cells may be used to study processes in-situ, exploiting the longer photon attenuation length and the longer zone plate working distances available at higher photon energy. The energy range will extend down to include the C1s edge at 300eV, to allow high energy NEXAFS microscopic studies to correlate with the imaging of organics in the same sample region of interest.

Kilcoyne, David; Ade, Harald; Attwood, David; Hitchcock, Adam; McKean, Pat; Mitchell, Gary; Monteiro, Paulo; Tyliszczak, Tolek; Warwick, Tony

2010-01-31T23:59:59.000Z

346

Research Experience Bibliography  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Research Programs Research Programs Found in Profiling Teacher Research Participation Programs: An Approach to Formative Evaluation, The National Center for Improving Science Edcuation of the NETWORK, Inc. with support from the United States Department of Energy, November, 1993. Gottfried, S.: Brown, C.; Markovits, P.; and Changar, J. Undated. "Scientific Work Experience Programs for Science Teachers: A Focus on Research-Related Internships." Unpublished Manuscript. The authors found five factors related to effective implementation of a research internship program: (1) mentors, project staff, and teachers share goals and expectations, have open, frequent communication; (2) teachers have articulated project or research assignment; (3) curriculum development component facilitated by expert, focus on process rather than product; (4)

347

The Cibola flight experiment  

SciTech Connect (OSTI)

The Cibola Flight Experiment (CFE) is an experimental small satellite carrying a reconfigurable processing instrument developed at the Los Alamos National Laboratory that demonstrates the feasibility of using FPGA-based high-performance computing for sensor processing in the space environment. The CFE satellite was launched on March 8, 2007 in low-earth orbit and has operated extremely well since its deployment. The nine Xilinx Virtex FPGAs used in the payload have been used for several high-throughput sensor processing applications and for single-event upset (SEU) monitoring and mitigation. This paper will describe the CFE system and summarize its operational results. In addition, this paper will describe the results from several SEU detection circuits that were performed on the spacecraft.

Caffrey, Michael Paul [Los Alamos National Laboratory; Nelson, Anthony [Los Alamos National Laboratory; Salazar, Anthony [Los Alamos National Laboratory; Roussel - Dupre, Diane [Los Alamos National Laboratory; Katko, Kim [Los Alamos National Laboratory; Palmer, Joseph [ISE-3; Robinson, Scott [Los Alamos National Laboratory; Wirthlin, Michael [BRIGHAM YOUNG UNIV; Howes, William [BRIGHAM YOUNG UNIV; Richins, Daniel [BRIGHAM YOUNG UNIV

2009-01-01T23:59:59.000Z

348

The SNO+ Experiment  

E-Print Network [OSTI]

The SNO+ experiment is the follow-up to the Sudbury Neutrino Observatory (SNO). The heavy water that was in SNO will be replaced with a liquid scintillator of linear alkylbenzene (plus fluor). SNO+ has many physics goals including detecting pep and CNO solar neutrinos, detecting geo-neutrinos, studying reactor neutrino oscillations, serving as a supernova neutrino detector and carrying out a search for neutrinoless double beta decay by adding neodymium to the liquid scintillator. Since a large amount of 150Nd isotope can be added to SNO+, a competitive search would be possible, with sensitivity below 100 meV using natural Nd and sensitivity below 40 meV with enriched neodymium.

Mark C. Chen; for the SNO+ collaboration

2008-10-20T23:59:59.000Z

349

Assessment of Project Management Experience  

Broader source: Energy.gov (indexed) [DOE]

Assessment of Project Management Experience PMCDP for CEG Competency 1.12.2 Assessment of Project Management Experience PMCDP for CEG Competency 1.12.2 Applicant Name: Applicant Supervisor: Date (mm/dd/yyyy): Directions: Step 1: Use this template to show project management experience for CEG competency 1.12.2. Rate your experience (0 - 5) in the following project management related activities using the scale below. Step 2: Sign the completed form and have your supervisor review and sign it. Step 3: Once approved by your supervisor, submit the form as part of your Level I certification package. Note: Project management experience is distinguished from FPD experience and applies to general project management activities and experience. Positions that do not count towards experience in project management include: program manager, property manager, health, safety and security (HSS) positions, and

350

LCA experiences in Danish industry  

Science Journals Connector (OSTI)

A study has been performed on Danish industry’s experiences with LCA. Twenty-six enterprises from different sectors conpleted ... learning phase, and experiences with full-blown LCA’s are sparse. Expectations of ...

Ole Broberg; Per Christensen

1999-09-01T23:59:59.000Z

351

Technological Transformation of Human Experience  

Science Journals Connector (OSTI)

This article was inspired by Don Ihde's work on the experience of technology in human-machine relations. (See Don Ihde. "The Experience of Technology," Cultural Hermeneutics, Vol. 2, 1974, pp. 267-279.)

Arun Kumar Tripathi

2008-07-01T23:59:59.000Z

352

Microscopic theory of sound propagation in the superfluid {sup 3}He-aerogel system  

SciTech Connect (OSTI)

We present a theory of sound propagation in superfluid {sup 3}He confined in aerogel, taking dragged aerogel motion into account. The superfluid dynamics coupled with the aerogel motion is formulated by use of the Keldysh Green's function for weak-coupling superfluid Fermi liquid. We apply the theory to the hydrodynamic regime and calculate the attenuation of a hydrodynamic longitudinal sound mode, the so-called fast mode. The result is compared to the acoustic experiment reported by the Northwestern University group [R. Nomura, G. Gervais, T. M. Haard, Y. Lee, N. Mulders, and W. P. Halperin, Phys. Rev. Lett. 85, 4325 (2000); G. Gervais, R. Nomura, T. M. Haard, Y. Lee, N. Mulders, and W. P. Halperin, J. Low Temp. Phys. 122, 1 (2001)]. We find reasonable agreement between the theory and the experiment.

Higashitani, S.; Miura, M.; Yamamoto, M.; Nagai, K. [Faculty of Integrated Arts and Sciences, Hiroshima University, Kagamiyama 1-7-1, Higashi-Hiroshima 739-8521 (Japan)

2005-04-01T23:59:59.000Z

353

The Tokamak Physics Experiment  

SciTech Connect (OSTI)

The mission of the Tokamak Physics Experiment (TPX) [Nevins {ital et} {ital al}., {ital Plasma} {ital Physics} {ital and} {ital Controlled} {ital Nuclear} {ital Fusion}, Wuerzburg (International Atomic Energy Agency, Vienna, 1992), Vol. 3, p. 279] is to develop the scientific basis for an economically competitive and continuously operating tokamak fusion power source. This complements the primary mission of the International Thermonuclear Experimental Reactor (ITER) [ITER Document Ser. No. 18 (International Atomic Energy Agency, Vienna, 1991)], the demonstration of ignition and long-pulse burn, and the integration of nuclear technologies. The TPX program is focused on making the demonstration power plant that follows ITER as compact and attractive as possible, and on permitting ITER to achieve its ultimate goal of steady-state operation. This mission of TPX requires the development of steady-state regimes with high beta, good confinement, and a high fraction of a self-driven bootstrap current. These regimes must be compatible with plasma stability, strong heat-flux dispersion in the divertor region, and effective particle control.

Davidson, R.C.; Goldston, R.J. [Princeton Plasma Physics Laboratory, Princeton, New Jersey 08543 (United States)] [Princeton Plasma Physics Laboratory, Princeton, New Jersey 08543 (United States); Neilson, G.H. [Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831 (United States)] [Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831 (United States); Thomassen, K.I. [Lawrence Livermore National Laboratory, Livermore, California 94550 (United States)] [Lawrence Livermore National Laboratory, Livermore, California 94550 (United States)

1995-06-01T23:59:59.000Z

354

Nuclear Reactor Severe Accident Experiments  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Nuclear Reactor Severe Accident Experiments Nuclear Reactor Severe Accident Experiments Capabilities Engineering Experimentation Reactor Safety Testing and Analysis Overview Nuclear Reactor Severe Accident Experiments MAX NSTF SNAKE Aerosol Experiments System Components Laser Applications Robots Applications Other Facilities Other Capabilities Work with Argonne Contact us For Employees Site Map Help Join us on Facebook Follow us on Twitter NE on Flickr Nuclear Reactor Severe Accident Experiments 1 2 3 4 5 6 7 We perform experiments simulating reactor core melt phenomena in which molten core debris ("corium") erodes the concrete floor of a containment building. This occurred during the Fukushima nuclear power plant accident though the extent of concrete damage is yet unknown. This video shows the top view of a churning molten pool of uranium oxide at 2000°C (3600°F) seen during an experiment at Argonne. Corium behaves much like lava.

355

Experiment Hazard Class 11 - Hydrogen  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

1 - Hydrogen 1 - Hydrogen Applicability This hazard classification applies to all experiments and processes involving the use of gaseous hydrogen. This class includes work performed in the Experiment Hall Beamline Stations and any preparatory/setup/testing work performed in the LOM laboratories. Other hazard controls such as fire protection and life safety regulations may apply to experiments of this hazard class. A summary of controls for hydrogen use is available in the hydrogen summary document. Experiment Category Experiments involving previously reviewed hazard controls qualify for categorized as medium risk. Experiments involving new equipment or modified hazard control schemes are categorized as high risk. Experiment Hazard Control Verification Statements Engineered Controls - Applicable controls for storage and use of

356

Millikan's Oil-Drop Experiment: A Centennial Setup Revisited in Virtual World  

Science Journals Connector (OSTI)

Early in the last century Robert Millikan developed a precise method of determining the electric charge carried by oil droplets.1–3 Using a microscope and a small incandescent lamp he observed the fall of charged droplets under the influence of an electric field inside a small observation chamber. In so doing Millikan demonstrated the existence of a fundamental unit of electric charge and established its quantization. Now renowned as one of the most famous experiments of 20th-century physics Millikan's oil-drop experiment has been reproduced with more or less success in most if not all high school and university physics classes. This has encouraged many improvements of the apparatus now making this experiment much more accurate and easier to realize for advanced students. However the required apparatus remains rather expensive and for introductory college or high school students the experiment is still quite difficult to conduct. As an alternative to the traditional setup a realistic computer-based simulator to replicate the Millikan oil-drop experiment has been developed. Using this software students are able to undertake a complete experiment obtain an accurate set of results and thus gain a better understanding of the original experiment and its historical importance.

Michel Gagnon

2012-01-01T23:59:59.000Z

357

Continuous-wave laser annealing of Si-rich oxide: A microscopic picture of macroscopic Si-SiO{sub 2} phase separation  

SciTech Connect (OSTI)

We report on the first observation of the macroscopic (long-range) Si-SiO{sub 2} phase separation in Si-rich oxide SiO{sub x}(x<2) obtained by continuous-wave laser annealing of free-standing SiO{sub x} films. The effect is analyzed by a unique combination of microscopic methods (Raman, transmission, photoluminescence, and infrared spectroscopy, transmission electron microscopy, electron energy loss spectroscopy, and x-ray photoelectron spectroscopy). Three regions can be distinguished on a SiO{sub x} free-standing film after 488 nm laser annealing at intensities above {approx}10{sup 4} W cm{sup -2}: central spot, ring around the central spot, and pristine film outside the irradiated area. In the pristine SiO{sub x} material, small Si nanocrystals (Si-nc) (diameters of a few nanometer) are surrounded by SiO{sub 2} with an addition of residual suboxides, the Si-nc being produced by annealing at 1100 deg. C in a furnace. The central spot of the laser-annealed area (up to {approx}30 {mu}m wide in these experiments) is practically free of Si excess and mainly consists of amorphous SiO{sub 2}. The ring around the central spot contains large spherical Si-nc (diameters up to {approx}100 nm) embedded in amorphous SiO{sub 2} without the presence of suboxides. Laser-induced temperatures in the structurally modified regions presumably exceed the Si melting temperature. The macroscopic Si-SiO{sub 2} phase separation is connected with extensive diffusion in temperature gradient leading to the Si concentration gradient. The present work demonstrates the advantages of high spatial resolution for analysis in materials research.

Khriachtchev, Leonid; Nikitin, Timur; Raesaenen, Markku; Domanskaya, Alexandra [Laboratory of Physical Chemistry, University of Helsinki, P.O. Box 55, FIN-00014 (Finland); Boninelli, Simona; Iacona, Fabio [MATIS IMM CNR, Via Santa Sofia 64, I-95123 Catania (Italy); Engdahl, Anders [MAX-lab, Lund University, P.O. Box 118, 22100 Lund (Sweden); Juhanoja, Jyrki [Top Analytica, Ruukinkatu 4, FIN-20540 Turku (Finland); Novikov, Sergei [Electron Physics Laboratory, Aalto University, P.O. Box 3000, FIN-02015 HUT (Finland)

2010-12-15T23:59:59.000Z

358

Microscopic control of $^{29}$Si nuclear spins near phosphorus donors in silicon  

E-Print Network [OSTI]

Dynamic nuclear polarization of $^{29}$Si nuclei in resolved lattice sites near the phosphorus donors in natural silicon of has been created using the Overhauser and solid effects. Polarization has been observed as a pattern of well separated holes and peaks in the electron spin resonance line of the donor. The Overhauser effect in ESR hole burning experiments was used to manipulate the polarization of $^{29}$Si spins at ultra low (100-500 mK) temperatures and in high magnetic field of 4.6 T. Extremely narrow holes of 15 mG width were created after several seconds of pumping.

Järvinen, J; Ahokas, J; Sheludyakov, S; Vainio, O; Lehtonen, L; Vasiliev, S; Fujii, Y; Mitsudo, S; Mizusaki, T; Gwak, M; Lee, SangGap; Lee, Soonchil; Vlasenko, L

2014-01-01T23:59:59.000Z

359

Mycoflora of pecans and microscopic studies of host-fungal interactions  

E-Print Network [OSTI]

. Inoculation experiments * 1 d h h d k d y p ~ r d hy~yh 'd h dark unknown fungus. The dark fungus failed to produce spores under a series of environmental conditions on several different media. Continued effort is underway to identify this fungus because... slowly than Success, Mahan or Desirable. The predominant fungi isolated from these k* 1 p '* f P I. , P ' 'll', P~h d 'k dar'k fungus. An examination of fungi in pecans of 7 cultivars moving in trade channels indicated all cultivars contained...

Wang, Huey-Ming

1975-01-01T23:59:59.000Z

360

On the microscopic nature of inhomogeneously broadened spectra of chromophores in glasses and crystals  

E-Print Network [OSTI]

the stereodynamics of chemical reac­ tions.5 However, as yet the only experimental demonstrations of substantial rotational alignment in supersonic beams per­ tain to alkali dimers6--9 (with a2 as large as - 0.4). Similar experiments have found puny alignment... position relative to the im­ purity. The (normalized) distribution of state a energies is then given by PaCE) = V- N f dR1···dRNP(R1,···,RN) Xo(E- [E~ + itIVa(Ri)]), (1) where P(R1, ... ,RN) is the probability distribution function for the coordinates...

Laird, Brian Bostian; Skinner, J. L.

1989-03-01T23:59:59.000Z

Note: This page contains sample records for the topic "microscopic double-slit experiment" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


361

Single particle resuspension experiments in turbulent channel flows  

Science Journals Connector (OSTI)

Abstract The resuspension of a monolayer of spherical glass and polypropylene particles from a channel floor by a dry and turbulent airflow was investigated. Special attention was given to the influence of the particle size, the particle and wall material, the wall surface roughness and the critical friction velocity. The experiments were performed in an air-driven small-scale test facility and the channel floor was made of interchangeable glass and steel wall segments. The turbulent channel flow was recorded using a planar Particle Image Velocimetry system. Prior to the experiments the spherical particles were classified using Scanning Electron Microscopy techniques. The particles on the channel floor were detected and classified by means of an optical microscope combined with a digital camera. A statistically sufficient particle monolayer was generated on the channel floor by dispersing the particles into the flow during a pure deposition regime. Afterwards, particle resuspension was induced by stepwise increase of the fluid velocity. The resuspension was quantified by the fraction of remaining particles against the friction velocity for a particle diameter range between 3 µm and 45 µm. It was found that particles instantly resuspend once a critical friction velocity is exceeded. Larger particles require lower fluid velocities for the removal than smaller particles. The wall surface roughness seems to scatter the resuspension process with respect to the friction velocity.

T. Barth; J. Preuß; G. Müller; U. Hampel

2014-01-01T23:59:59.000Z

362

Overview of LHD Experiments  

SciTech Connect (OSTI)

Experimental studies on the Large Helical Device during the last two years are reviewed. After the start of LHD experiment in 1998, the magnetic field has been gradually raised up to 2.89 T. The heating power has been increased, up to 4.2 MW for NBI, 1.3 MW for ICRF, and 0.9 MW for ECRH. Upgrading the key hardware systems has led to the extension of the plasma parameters to (i) higher Te [ Te(0) = 4.4 keV at = 5.3 x 1018 m-3 and Pabs = 1.8 MW ], (ii) higher confinement [ tE = 0.3 s, Te(0) = 1.1 keV at = 6.5 x 1019 m-3 and Pabs = 2.0 MW ] and (iii) higher stored energy Wp dia = 880 kJ. High performance plasmas have been realized in the inward shifted magnetic axis configuration (R=3.6m) where the helical symmetry is recovered and the particle orbit properties are improved by trade off of MHD stability properties due to the appearance of the magnetic hill. The energy confinement was systematically higher than that predicted by the International Stellerator Scaling 95 up to a factor of 1.6 and was comparable with ELMy H-mode confinement capability in tokamaks. This confinement improvement is attributed to the configuration control (the inward shift of magnetic axis) and to the formation of the high edge temperature. The achieved average beta value reached 2.4 % at B=1.3 T, the highest beta value ever obtained in helical devices, and so far no degradation of confinement by MHD phenomenon is observed. The inward shifted configuration has also led to successful ICRF minority ion heating. ICRF power up to 1.3 MW was reliably injected into the plasma without significant impurity contamination and a plasma with a stored energy of 200 kJ was sustained for 5 sec by ICRF alone. As another important result long pulse discharges of more than 1 minute were successfully achieved separately with NBI heating of 0.5 MW and with ICRF heating of 0.85 MM.

Fujiwara, M. [National Institute for Fusion Science, Toki, Japan; Kawahata, K. [National Institute for Fusion Science, Toki, Japan; Ohyabu, N. [National Institute for Fusion Science, Toki, Japan; Kaneko, O. [National Institute for Fusion Science, Toki, Japan; Komori, A. [National Institute for Fusion Science, Toki, Japan; Yamada, H. [National Institute for Fusion Science, Toki, Japan; Ashikawa, N. [Graduate University for Advanced Studies, Japan; Baylor, Larry R [ORNL; Combs, Stephen Kirk [ORNL; DeVries, P. [National Institute for Fusion Science, Toki, Japan; Emoto, M. [National Institute for Fusion Science, Toki, Japan; Ejiri, E. [University of Tokyo, Tokyo, Japan; Fisher, Paul W [ORNL; Funaba, H. [National Institute for Fusion Science, Toki, Japan; Goto, M. [National Institute for Fusion Science, Toki, Japan; Hartmann, D. [Max Planck Institute for Plasma Physics, Garching, Germany; Ida, K. [National Institute for Fusion Science, Toki, Japan; Idei, H. [National Institute for Fusion Science, Toki, Japan; Iio, S. [Tokyo Institute of Technology; Ikeda, K. [National Institute for Fusion Science, Toki, Japan; Inagaki, S. [National Institute for Fusion Science, Toki, Japan; Inoue, N. [National Institute for Fusion Science, Toki, Japan; Isobe, M. [National Institute for Fusion Science, Toki, Japan; Kado, S, [University of Tokyo, Tokyo, Japan; Khlopenkov, K. [National Institute for Fusion Science, Toki, Japan; Kobuchi, T. [Graduate University for Advanced Studies, Japan; Krasilnikov, A. V. [Troitsk Institute of Nuclear Physics (TRINITI), Russia; Kubo, S. [National Institute for Fusion Science, Toki, Japan; Kumazawa, R. [National Institute for Fusion Science, Toki, Japan; Leuterer, F. [Max Planck Institute for Plasma Physics, Garching, Germany; Liang, Y. [Graduate University for Advanced Studies, Japan; Lyon, James F [ORNL; Masuzaki, S. [National Institute for Fusion Science, Toki, Japan; Minami, T. [National Institute for Fusion Science, Toki, Japan; Miyajima, J. [National Institute for Fusion Science, Toki, Japan; Morisaki, T. [National Institute for Fusion Science, Toki, Japan; Morita, S. [National Institute for Fusion Science, Toki, Japan; Murakami, S. [National Institute for Fusion Science, Toki, Japan; Muto, S. [National Institute for Fusion Science, Toki, Japan; Mutoh, T. [National Institute for Fusion Science, Toki, Japan; Nagayama, Y. [National Institute for Fusion Science, Toki, Japan; Nakajima, N. [National Institute for Fusion Science, Toki, Japan; Nakamura, Y. [National Institute for Fusion Science, Toki, Japan; Nakanishi, H. [National Institute for Fusion Science, Toki, Japan; Narihara, K. [National Institute for Fusion Science, Toki, Japan; Nishimura, K. [National Institute for Fusion Science, Toki, Japan; Noda, N. [National Institute for Fusion Science, Toki, Japan; Notake, T. [Nagoya University, Japan; Ohdachi, S. [National Institute for Fusion Science, Toki, Japan; Oka, Y. [National Institute for Fusion Science, Toki, Japan; Okajima, S. [Chuba University, Japan; Okamoto, M. [National Institute for Fusion Science, Toki, Japan; Osakabe, M. [National Institute for Fusion Science, Toki, Japan; Ozaki, T. [National Institute for Fusion Science, Toki, Japan; Pavlichenko, R. O. [National Institute for Fusion Science, Toki, Japan; Peterson, B. J. [National Institute for Fusion Science, Toki, Japan; Sagara, A. [National Institute for Fusion Science, Toki, Japan; Saito, K. [Nagoya University, Japan; Sakakibara, S. [National Institute for Fusion Science, Toki, Japan; Sakamoto, R. [National Institute for Fusion Science, Toki, Japan; Sanuki, H. [National Institute for Fusion Science, Toki, Japan; Sasao, H. [Graduate University for Advanced Studies, Japan; Sasao, M. [National Institute for Fusion Science, Toki, Japan; Sato, K. [National Institute for Fusion Science, Toki, Japan; et al.

2001-01-01T23:59:59.000Z

363

Fermi-level shifts in graphene transistors with dual-cut channels scraped by atomic force microscope tips  

SciTech Connect (OSTI)

We investigate the electronic properties of p-type graphene transistors on silicon dioxide with dual-cut channels that were scraped using atomic force microscope tips. In these devices, the current is forced to squeeze into the path between the two cuts rather than flow directly through the graphene sheet. We observe that the gate voltages with minimum current shift toward zero bias as the sizes of the dual-cut regions increase. These phenomena suggest that the Fermi levels in the dual-cut regions are shifted toward the Dirac points after the mechanical scraping process.

Lin, Meng-Yu [Institute of Electronics, National Taiwan University, Taipei 10617, Taiwan (China); Research Center for Applied Sciences, Academia Sinica, Taipei 11529, Taiwan (China); Chen, Yen-Hao [Department of Photonics, National Chiao Tung University, Hsinchu 30010, Taiwan (China); Su, Chen-Fung [College of Photonics, National Chiao Tung University, Tainan 71150, Taiwan (China); Chang, Shu-Wei [Research Center for Applied Sciences, Academia Sinica, Taipei 11529, Taiwan (China); Department of Photonics, National Chiao Tung University, Hsinchu 30010, Taiwan (China); Lee, Si-Chen [Institute of Electronics, National Taiwan University, Taipei 10617, Taiwan (China); Lin, Shih-Yen, E-mail: shihyen@gate.sinica.edu.tw [Institute of Electronics, National Taiwan University, Taipei 10617, Taiwan (China); Research Center for Applied Sciences, Academia Sinica, Taipei 11529, Taiwan (China); Department of Photonics, National Chiao Tung University, Hsinchu 30010, Taiwan (China)

2014-01-13T23:59:59.000Z

364

Tidal Waves -- a non-adiabatic microscopic description of the yrast states in near-spherical nuclei  

E-Print Network [OSTI]

The yrast states of nuclei that are spherical or weakly deformed in their ground states are described as quadrupole waves running over the nuclear surface, which we call "tidal waves". The energies and E2 transition probabilities of the yrast states in nuclides with $Z$= 44, 46, 48 and $N=56, ~58,..., 66$ are calculated by means of the cranking model in a microscopic way. The nonlinear response of the nucleonic orbitals results in a strong coupling between shape and single particle degrees of freedom.

S. Frauendorf; Y. Gu; J. Sun

2011-09-08T23:59:59.000Z

365

Results from Neutrino Oscillations Experiments  

SciTech Connect (OSTI)

The interpretation of the results of early solar and atmospheric neutrino experiments in terms of neutrino oscillations has been verified by several recent experiments using both, natural and man-made sources. The observations provide compelling evidence in favor of the existence of neutrino masses and mixings. These proceedings give a general description of the results from neutrino oscillation experiments, the current status of the field, and some possible future developments.

Aguilar-Arevalo, Alexis [Instituto de Ciencias Nucleares, Universidad Nacional Autonoma de Mexico, Apartado Postal 70-543, Mexico, D.F., 04510 (Mexico)

2010-09-10T23:59:59.000Z

366

Neutron activation experiments in radiochemistry  

Science Journals Connector (OSTI)

Neutron activation experiments in radiochemistry ... Describes experimentation involving the neutron activation of a variety of samples irradiated in a subcritical reactor and a paraffin-moderated source. ...

Karl S. Vorres

1960-01-01T23:59:59.000Z

367

Future Cosmic Microwave Background Experiments  

E-Print Network [OSTI]

We summarise some aspects of experiments currently being built or planned, and indulge in wild speculation about possibilities on the more distant horizon.

Mark Halpern; Douglas Scott

1999-04-19T23:59:59.000Z

368

Chemistry: Mechanism and Experiment - Combustion Energy Frontier...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Chemistry: Mechanism and Experiment Chemistry: Mechanism and Experiment The Mechanism and Experiment DWG uses an array of advanced experimental apparatus to probe the combustion...

369

Producing reliable software: an experiment  

Science Journals Connector (OSTI)

A customer of high assurance software recently sponsored a software engineering experiment in which a small real-time software system was developed concurrently by two popular software development methodologies. One company specialized in the state-of-the-practice ... Keywords: capability maturity model, cleanroom certification, formal methods, software development methodologies, software engineering experiment, software process and product metrics, software reliability

Carol Smidts; Xin Huang; James C. Widmaier

2002-04-01T23:59:59.000Z

370

Experiments in Physics Physics 1291  

E-Print Network [OSTI]

and Conservation of Energy 97 1-9 Standing Waves 105 1-10 Specific Heat and Mechanical Equivalent of Heat 115 #12;#12;Introduction 1-0 General Instructions 1 Purpose of the Laboratory The laboratory experiments described in this manual are an important part of your physics course. Most of the experiments are designed to illustrate

Columbia University

371

Detailed microscopic calculation of stellar electron and positron capture rates on $^{24}$Mg for O+Ne+Mg core simulations  

E-Print Network [OSTI]

Few white dwarfs, located in binary systems, may acquire sufficiently high mass accretion rates resulting in the burning of carbon and oxygen under nondegenerate conditions forming a O+Ne+Mg core. These O+Ne+Mg cores are gravitationally less bound than more massive progenitor stars and can release more energy due to the nuclear burning. They are also amongst the probable candidates for low entropy r-process sites. Recent observations of subluminous Type II-P supernovae (e.g., 2005cs, 2003gd, 1999br, 1997D) were able to rekindle the interest in 8 -- 10 M$_{\\odot}$ which develop O+Ne+Mg cores. Microscopic calculations of capture rates on $^{24}$Mg, which may contribute significantly to the collapse of O+Ne+Mg cores, using shell model and proton-neutron quasiparticle random phase approximation (pn-QRPA) theory, were performed earlier and comparisons made. Simulators, however, may require these capture rates on a fine scale. For the first time a detailed microscopic calculation of the electron and positron captur...

Nabi, Jameel-Un

2014-01-01T23:59:59.000Z

372

Macroscopic and Microscopic Paradigms for the Torsion Field: from the Test-Particle Motion to a Lorentz Gauge Theory  

E-Print Network [OSTI]

Torsion represents the most natural extension of General Relativity and it attracted interest over the years in view of its link with fundamental properties of particle motion. The bulk of the approaches concerning the torsion dynamics focus their attention on their geometrical nature and they are naturally led to formulate a non-propagating theory. Here we review two different paradigms to describe the role of the torsion field, as far as a propagating feature of the resulting dynamics is concerned. However, these two proposals deal with different pictures, i.e., a macroscopic approach, based on the construction of suitable potentials for the torsion field, and a microscopic approach, which relies on the identification of torsion with the gauge field associated with the local Lorentz symmetry. We analyze in some detail both points of view and their implications on the coupling between torsion and matter will be investigated. In particular, in the macroscopic case, we analyze the test-particle motion to fix the physical trajectory, while, in the microscopic approach, a natural coupling between torsion and the spin momentum of matter fields arises.

Nakia Carlevaro; Orchidea Maria Lecian; Giovanni Montani

2007-12-07T23:59:59.000Z

373

Combined low-temperature scanning tunneling/atomic force microscope for atomic resolution imaging and site-specific force spectroscopy  

SciTech Connect (OSTI)

The authors present the design and first results of a low-temperature, ultrahigh vacuum scanning probe microscope enabling atomic resolution imaging in both scanning tunneling microscopy (STM) and noncontact atomic force microscopy (NC-AFM) modes. A tuning-fork-based sensor provides flexibility in selecting probe tip materials, which can be either metallic or nonmetallic. When choosing a conducting tip and sample, simultaneous STM/NC-AFM data acquisition is possible. Noticeable characteristics that distinguish this setup from similar systems providing simultaneous STM/NC-AFM capabilities are its combination of relative compactness (on-top bath cryostat needs no pit), in situ exchange of tip and sample at low temperatures, short turnaround times, modest helium consumption, and unrestricted access from dedicated flanges. The latter permits not only the optical surveillance of the tip during approach but also the direct deposition of molecules or atoms on either tip or sample while they remain cold. Atomic corrugations as low as 1 pm could successfully be resolved. In addition, lateral drifts rates of below 15 pm/h allow long-term data acquisition series and the recording of site-specific spectroscopy maps. Results obtained on Cu(111) and graphite illustrate the microscope's performance.

Schwarz, Udo; Albers, Boris J.; Liebmann, Marcus; Schwendemann, Todd C.; Baykara, Mehmet Z.; Heyde, Markus; Salmeron, Miquel; Altman, Eric I.; Schwarz, Udo D.

2008-02-27T23:59:59.000Z

374

Investigation of microscopic radiation damage in waste forms using ODNMR and AEM techniques. (EMSP Project Final Report)  

SciTech Connect (OSTI)

This project seeks to understand the microscopic effects of radiation damage in nuclear waste forms. The authors' approach to this challenge encompasses studies of ceramics and glasses containing short-lived alpha- and beta-emitting actinides with electron microscopy, laser and X-ray spectroscopic techniques, and computational modeling and simulations. In order to obtain information on long-term radiation effects on waste forms, much of the effort is to investigate {alpha}-decay induced microscopic damage in 18-year old samples of crystalline yttrium and lutetium orthophosphates that initially contained {approximately} 1(wt)% of the alpha-emitting isotope {sup 244}Cm (18.1 y half life). Studies also are conducted on borosilicate glasses that contain {sup 244}Cm, {sup 241}Am, or {sup 249}Bk, respectively. The authors attempt to gain clear insights into the properties of radiation-induced structure defects and the consequences of collective defect-environment interactions, which are critical factors in assessing the long-term performance of high-level nuclear waste forms.

Liu, G.; Luo, J.; Beitz, J.; Li, S.; Williams, C.; Zhorin, V.

2000-04-21T23:59:59.000Z

375

Adsorption of probe molecules in pillared interlayered clays: Experiment and computer simulation  

Science Journals Connector (OSTI)

In this paper we investigate the adsorption of various probe molecules in order to characterize the porous structure of a series of pillared interlayered clays (PILC). To that aim volumetric and microcalorimetric adsorption experiments were performed on various Zr PILC samples using nitrogen toluene and mesitylene as probe molecules. For one of the samples neutron scattering experiments were also performed using toluene as adsorbate. Various structural models are proposed and tested by means of a comprehensive computer simulation study using both geometric and percolation analysis in combination with Grand Canonical Monte Carlo simulations in order to model the volumetric and microcalorimetric isotherms. On the basis of this analysis we propose a series of structural models that aim at accounting for the adsorption experimental behavior and make possible a microscopic interpretation of the role played by the different interactions and steric effects in the adsorption processes in these rather complex disordered microporous systems.

A. Gallardo; J. M. Guil; E. Lomba; N. G. Almarza

2014-01-01T23:59:59.000Z

376

LANL | Physics | Dynamic Plutonium Experiments  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Dynamic plutonium experiments Dynamic plutonium experiments Since the end of nuclear testing the nation has had to rely on sophisticated computer models to ensure the safety and reliability of the nuclear weapons stockpile. This program is known as science-based stockpile stewardship. Despite possessing the world's fastest computers and most advanced modeling capability, the behavior of materials under dynamic loads that occur in a nuclear weapon are difficult to accurately model. The Dynamic Plutonium experimental program carries out experiments at the Nevada National Security Site on plutonium driven by high explosives. These experiments are needed to measure and understand the behavior of plutonium under extreme conditions. Physics Division has unique capabilities in high-speed x-ray imaging and velocimetry (measuring the

377

Crucial Experiments in Climate Science  

Science Journals Connector (OSTI)

This article discusses the interplay between computational experiments and scientific advancement in dynamical meteorology and climate dynamics. In doing so, the emphasis is on the dual role of computations in prediction and experimentation, ...

A. Navarra; J. L. Kinter III; J. Tribbia

2010-03-01T23:59:59.000Z

378

Essays in macroeconomics and experiments  

E-Print Network [OSTI]

This dissertation consists of four chapters on empirical and experimental macroeconomics and other experimental topics. Chapter 1 uses a laboratory experiment to test the predictions of a dynamic global game designed to ...

Shurchkov, Olga

2008-01-01T23:59:59.000Z

379

DOE Corporate Operating Experience Program  

Broader source: Directives, Delegations, and Requirements [Office of Management (MA)]

The Order institutes a DOE wide program for the management of operating experience to prevent adverse operating incidents and facilitate the sharing of good work practices among DOE sites. Cancels DOE O 210.2.

2011-04-08T23:59:59.000Z

380

Introductory Experiment in Electrical Measurements  

Science Journals Connector (OSTI)

The author has felt that the transition from the elementary to the intermediate laboratory may sometimes be too abrupt and that while the student is getting accustomed to the more advanced laboratory he misses some of the important points in the early experiments he performs. The experiment described is designed to accustom the student to the new level of experiments and give him some insight into some fundamental principles of experimentation. The experiment consists of measuring a resistance by several different methods. The results are then compared and the relative merits of the methods are discussed. The methods used are the ohmmeter the voltmeter-ammeter method the Wheatstone bridge the potentiometer and the substitution method. Details of these measurements will be discussed.

Francis T. Worrell

1957-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "microscopic double-slit experiment" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


381

An experiment on wind energy  

Science Journals Connector (OSTI)

We discuss an experiment on wind energy performed with home-made apparatus. The experiment reproduces a laboratory windmill, which can pump water from a lower level to a higher one. By measuring the gain of the gravitational potential energy of the pumped water, one can determine the power extracted from the wind. The activity was carried out with high-school students, in the framework of the Italian National Plan for Scientific Degrees—Physics. The proposed experiment allows teachers to discuss renewable energy sources with students whose knowledge of physics is limited to mechanics. It gives students the possibility to gain experience with energy and to increase their awareness of this renewable energy source.

Vincenzo Lombardo; Emilio Fiordilino; Aurelio Agliolo Gallitto; Pasquale Aglieco

2012-01-01T23:59:59.000Z

382

Experiments on Cryogenic Complex Plasma  

SciTech Connect (OSTI)

Experiments on a cryogenic complex plasma have been performed. Preliminary experiments include production of a plasma in a liquid helium or in a cryogenic helium gas by a pulsed discharge. The extended production of a plasma has been realized in a vapor of liquid helium or in a cryogenic helium gas by rf discharge. The charge of dust particles injected in such a plasma has been studied in detail.

Ishihara, O.; Sekine, W.; Kubota, J.; Uotani, N.; Chikasue, M.; Shindo, M. [Faculty of Engineering, Yokohama National University Yokohama, 240-8501 (Japan)

2009-11-10T23:59:59.000Z

383

GCFR thermal-hydraulic experiments  

SciTech Connect (OSTI)

The thermal-hydraulic experimental studies performed and planned for the Gas-Cooled Fast Reactor (GCFR) core assemblies are described. The experiments consist of basic studies performed to obtain correlations, and bundle experiments which provide input for code validation and design verification. These studies have been performed and are planned at European laboratories, US national laboratories, Universities in the US, and at General Atomic Company

Schlueter, G.; Baxi, C.B.; Dalle Donne, M.; Gat, U.; Fenech, H.; Hanson, D.; Hudina, M.

1980-01-01T23:59:59.000Z

384

A high-stability scanning tunneling microscope achieved by an isolated tiny scanner with low voltage imaging capability  

SciTech Connect (OSTI)

We present a novel homebuilt scanning tunneling microscope (STM) with high quality atomic resolution. It is equipped with a small but powerful GeckoDrive piezoelectric motor which drives a miniature and detachable scanning part to implement coarse approach. The scanning part is a tiny piezoelectric tube scanner (industry type: PZT-8, whose d{sub 31} coefficient is one of the lowest) housed in a slightly bigger polished sapphire tube, which is riding on and spring clamped against the knife edges of a tungsten slot. The STM so constructed shows low back-lashing and drifting and high repeatability and immunity to external vibrations. These are confirmed by its low imaging voltages, low distortions in the spiral scanned images, and high atomic resolution quality even when the STM is placed on the ground of the fifth floor without any external or internal vibration isolation devices.

Wang, Qi; Wang, Junting; Lu, Qingyou, E-mail: qxl@ustc.edu.cn [High Magnetic Field Laboratory, Chinese Academy of Sciences and University of Science and Technology of China, Hefei, Anhui 230026 (China) [High Magnetic Field Laboratory, Chinese Academy of Sciences and University of Science and Technology of China, Hefei, Anhui 230026 (China); Hefei National Laboratory for Physical Sciences at Microscale, University of Science and Technology of China, Hefei, Anhui 230026 (China); Hou, Yubin [High Magnetic Field Laboratory, Chinese Academy of Sciences and University of Science and Technology of China, Hefei, Anhui 230026 (China)] [High Magnetic Field Laboratory, Chinese Academy of Sciences and University of Science and Technology of China, Hefei, Anhui 230026 (China)

2013-11-15T23:59:59.000Z

385

Direct measurement of proton-beam-written polymer optical waveguide sidewall morphorlogy using an atomic force microscope  

SciTech Connect (OSTI)

Proton-beam writing (PBW) is a direct-write micromachining technique capable of fabricating low-loss single-mode polymer waveguides with straight and smooth sidewalls. Recently, the sidewall morphologies of such proton beam written polymer waveguide structures were directly measured using an atomic force microscope (AFM). Statistical information such as the rms roughness and the correlation length of the sidewall profile obtained from the AFM scans allows us to quantify the quality of the sidewalls and optimize the fabrication parameters using PBW. For structures fabricated using a stage scanning speed of {approx}10 {mu}m/s, a rms roughness of 3.8{+-}0.3 nm with a correlation length of 46{+-}6 nm was measured.

Sum, T.C.; Bettiol, A.A.; Seng, H.L.; Kan, J.A. van; Watt, F. [Department of Physics Centre for Ion Beam Applications (CIBA), National University of Singapore, 2 Science Drive 3, Singapore 117542 (Singapore)

2004-08-23T23:59:59.000Z

386

Gas-grain chemistry in cold interstellar cloud cores with a microscopic Monte Carlo approach to surface chemistry  

E-Print Network [OSTI]

AIM: We have recently developed a microscopic Monte Carlo approach to study surface chemistry on interstellar grains and the morphology of ice mantles. The method is designed to eliminate the problems inherent in the rate-equation formalism to surface chemistry. Here we report the first use of this method in a chemical model of cold interstellar cloud cores that includes both gas-phase and surface chemistry. The surface chemical network consists of a small number of diffusive reactions that can produce molecular oxygen, water, carbon dioxide, formaldehyde, methanol and assorted radicals. METHOD: The simulation is started by running a gas-phase model including accretion onto grains but no surface chemistry or evaporation. The starting surface consists of either flat or rough olivine. We introduce the surface chemistry of the three species H, O and CO in an iterative manner using our stochastic technique. Under the conditions of the simulation, only atomic hydrogen can evaporate to a significant extent. Althoug...

Chang, Q; Herbst, E

2007-01-01T23:59:59.000Z

387

Microscopic magnetic properties of an oxygen-doped Tb-Fe thin film by magnetic Compton scattering  

SciTech Connect (OSTI)

The magnetic Compton scattering of a Tb{sub 32}Fe{sub 55}O{sub 13} film was measured in order to investigate the microscopic magnetization processes (i.e., the spin moment, orbital moment, and element specific moments). The trend of the spin magnetic moment was the same as that of the total magnetic moment but opposite to the orbital magnetic moment. In the low magnetic field region, the magnetic moments were not perfectly aligned perpendicular to the film surface, and the perpendicular components were found to mainly arise from the magnetic moment of Tb. Oxygen atoms hinder long range magnetic interaction and hence also affect the magnetization process of the magnetic moments of Tb and Fe.

Agui, Akane, E-mail: agui@spring8.or.jp [Quantum Beam Science Directorate, Japan Atomic Energy Agency, SPring-8, Sayo, Hyogo 679-5148 (Japan); Unno, Tomoya; Matsumoto, Sayaka; Suzuki, Kousuke; Sakurai, Hiroshi [Department of Production Science and Technology, Gunma University, Ota, Gunma 373-0057 (Japan); Koizumi, Akihisa [Graduate School of Material Science, University of Hyogo, Kamigori, Hyogo 678-1297 (Japan)

2013-11-14T23:59:59.000Z

388

Detailed microscopic calculation of stellar electron and positron capture rates on $^{24}$Mg for O+Ne+Mg core simulations  

E-Print Network [OSTI]

Few white dwarfs, located in binary systems, may acquire sufficiently high mass accretion rates resulting in the burning of carbon and oxygen under nondegenerate conditions forming a O+Ne+Mg core. These O+Ne+Mg cores are gravitationally less bound than more massive progenitor stars and can release more energy due to the nuclear burning. They are also amongst the probable candidates for low entropy r-process sites. Recent observations of subluminous Type II-P supernovae (e.g., 2005cs, 2003gd, 1999br, 1997D) were able to rekindle the interest in 8 -- 10 M$_{\\odot}$ which develop O+Ne+Mg cores. Microscopic calculations of capture rates on $^{24}$Mg, which may contribute significantly to the collapse of O+Ne+Mg cores, using shell model and proton-neutron quasiparticle random phase approximation (pn-QRPA) theory, were performed earlier and comparisons made. Simulators, however, may require these capture rates on a fine scale. For the first time a detailed microscopic calculation of the electron and positron capture rates on $^{24}$Mg on an extensive temperature-density scale is presented here. This type of scale is more appropriate for interpolation purposes and of greater utility for simulation codes. The calculations are done using the pn-QRPA theory using a separable interaction. The deformation parameter, believed to be a key parameter in QRPA calculations, is adopted from experimental data to further increase the reliability of the QRPA results. The resulting calculated rates are up to a factor of 14 or more enhanced as compared to shell model rates and may lead to some interesting scenario for core collapse simulators.

Jameel-Un Nabi

2014-08-15T23:59:59.000Z

389

Towards a Social Psychology-based Microscopic Model of Driver Behavior and Decision-making: Modifying Lewin's Field Theory  

Science Journals Connector (OSTI)

Abstract Central to effective roadway design is the ability to understand how drivers behave as they traverse a segment of roadway. While simple and complex microscopic models have been used over the years to analyse driver behaviour, most models: 1.) incorporate separate car-following and lane-changing algorithms, and thus do not capture the interdependencies between lane-changing and car-following vehicle; 2.) do not capture differences in the drivers’ cognitive and physical characteristics; and 3.) are constructed from observed vehicle movements and make no attempt to model the discrete differences between how each roadway element alters each driver's behaviour. This paper employs field theory to construct a conceptual framework for a new microscopic model. In field theory, an agent (e.g. the driver) views a field (i.e. the area surrounding the vehicle) filled with stimuli and perceives forces associated with each stimuli once these stimuli are internalized. Based on this theory, the resulting model would be designed to directly incorporate drivers’ perceptions to roadway stimuli along with vehicle movements for drivers of different cognitive and physical abilities. It is postulated that such a model would more effectively reflect reality, and if this model were accurately calibrated, could potentially model the effects of external stimuli such as innovative geometric configurations, lane closures, and technology applications such as variable message boards. A modified field theory could potentially capture and model “hot topics” in traffic engineering, such as the distracted drivers, road rage, the incorporation of ITS elements, and driver behaviour through a work zone.

Andrew Leo Berthaume; Matthew R.E. Romoser; John Collura; Daiheng Ni

2014-01-01T23:59:59.000Z

390

Toward the development of a soft x-ray reflection imaging microscope in the Schwarzschild configuration using a soft x-ray laser at 18. 2 nm  

SciTech Connect (OSTI)

We present the recent results obtained from a soft X-ray reflection imaging microscope in the Schwarzschild configuration. The microscope demonstrated a spatial resolution of 0.7 {mu}m with a magnification of 16 at 18.2 nm. The soft X-ray laser at 18.2 nm was used as an X-ray source. Mo/Si multilayers were coated on the Schwarzschild optics and the normal incidence reflectivity at 18.2 nm per surface was measured to be {approximately} 20 %. 18 refs., 6 figs.

Dicicco, D.; Rosser, R. (Princeton X-Ray Laser, Inc., Monmouth Junction, NJ (United States)); Kim, D.; Suckewer, S. (Princeton Univ., NJ (United States). Plasma Physics Lab.)

1991-12-01T23:59:59.000Z

391

Experiment  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Prescott, AZ 86301 C. Bhat, S. J. Brice, B. C. Brown, L. Bugel, B. T. Fleming, R. Ford, F. G. Garcia, P. Kasper, T. Kobilarcik, I. Kourbanis, A. Malensek, W. Marsh, P....

392

Retail Choice Experiments: Comparing Early-AdopterExperience  

SciTech Connect (OSTI)

This paper reviews the experience with retail choice of non-residential electricity customers during the period from early 1998 through the first few months of 2000. Key findings include: (1) customers in California received a significantly smaller discount from utility tariffs than customers in other competitive markets; (2) this sample of large commercial/industrial customers believed they were benefiting significantly more from commodity savings from contracts with retail electricity service providers (RESP) than from value-added services; and,(3) market rules appear to be critical to customer experiences with retail competition, yet the relationship between market rules and market development is inadequately understood.

Golove, William

2003-03-01T23:59:59.000Z

393

Optimizing New Dark Energy Experiments  

SciTech Connect (OSTI)

Next generation “Stage IV” dark energy experiments under design during this grant, and now under construction, will enable the determination of the properties of dark energy and dark matter to unprecedented precision using multiple complementary probes. The most pressing challenge in these experiments is the characterization and understanding of the systematic errors present within any given experimental configuration and the resulting impact on the accuracy of our constraints on dark energy physics. The DETF and the P5 panel in their reports recommended “Expanded support for ancillary measurements required for the long-term program and for projects that will improve our understanding and reduction of the dominant systematic measurement errors.” Looking forward to the next generation Stage IV experiments we have developed a program to address the most important potential systematic errors within these experiments. Using data from current facilities it has been feasible and timely to undertake a detailed investigation of the systematic errors. In this DOE grant we studied of the source and impact of the dominant systematic effects in dark energy measurements, and developed new analysis tools and techniques to minimize their impact. Progress under this grant is briefly reviewed in this technical report. This work was a necessary precursor to the coming generations of wide-deep probes of the nature of dark energy and dark matter. The research has already had an impact on improving the efficiencies of all Stage III and IV dark energy experiments.

Tyson, J. Anthony [University of California, Davis

2013-08-26T23:59:59.000Z

394

UNIRIB Participant Experiences: Ron Goans  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Ron Goans Ron Goans Ron Goans Ron Goans Ron Goans is a graduate research assistant working on the thesis component of his master's degree in physics while performing experiments at the Holifield Radioactive Ion Beam Facility (HRIBF) at Oak Ridge National Laboratory (ORNL). His thesis research specifically relates to the field of radioactive ion beam development. The purpose of radioactive ion beam development is to study and produce high-intensity, high-purity beams of radioactive nuclides. These beams are used by nuclear physicists to study the structure of short-lived nuclei. Below is a question and answer dialog about Goans' experience in Oak Ridge. The video featured on the right side of this page also spotlights his experience with the University Radioactive Ion Beam (UNIRIB)

395

Neutrino interactions in oscillation experiments  

Science Journals Connector (OSTI)

We calculate the neutrino induced cross sections relevant for oscillation experiments, including the ?-lepton threshold for quasielastic, resonance and deep-inelastic scattering. In addition to threshold effects, we include nuclear corrections for heavy targets which are moderate for quasielastic and large for single pion production. The nuclear effects for deep-inelastic reactions are small. We present cross sections together with their nuclear corrections for various channels which are useful for interpreting the experimental results and for determining parameters of the neutrino sector. Finally, we calculate the ?-lepton event rates for the OPERA LBL experiment.

E. A. Paschos and J. Y. Yu

2002-01-07T23:59:59.000Z

396

A Home Experiment in Elasticity  

E-Print Network [OSTI]

We analyze a simple problem in elasticity: the \\emph{initial} motion of an elastic bar that after being hanged from an end is suddenly released. In a second problem a point mass is attached on the top of the bar. The analytical solutions uncover some unexpected properties, which can be checked, with a digital camera or camcorder, in an alternative setup in which a spring is substituted for the bar. The theoretical model and the experiments are useful to understand the similarities and differences between the elastic properties of bar and spring. Students can take advantage of the home experiments to improve their understanding of elastic waves.

J. M. Aguirregabiria; A. Hernández; M. Rivas

2006-07-06T23:59:59.000Z

397

Microscopic Description of Nuclear Collective Rotation by Means of the Self-Consistent Collective Coordinate Method: Occurrence Mechanism of Collective Rotation  

Science Journals Connector (OSTI)

......Ibaraki 305 *) Institute for Nuclear Study, University of Tokyo...minimum as the origin of the nuclear collective rotation, the self-consistent...Expansion of the Rotational Energy Jun Terasaki Progress of Theoretical...Microscopic Description of Nuclear Collective Rotation in Band-Crossing......

Jun Terasaki; Toshio Marumori; Fumihiko Sakata

1991-06-01T23:59:59.000Z

398

Atomic-Resolution Image of GaAs(110) Surface with an Ultrahigh-Vacuum Atomic Force Microscope (UHV-AFM)  

Science Journals Connector (OSTI)

The first demonstration of atomic-resolution imaging of a GaAs(HO) surface with an ultrahigh vacuum atomic force microscope (UHV-AFM) was performed. We also observed ... GaAs(llO). This result suggests that the UHV

Y. Sugawara; M. Ohta; K. Hontani; S. Morita; F. Osaka…

1995-01-01T23:59:59.000Z

399

Crystal structure of Si3N4·Y2O3 examined by a 1 MV high-resolution electron microscope  

Science Journals Connector (OSTI)

The crystal structure of Si3N4·Y2O3...prepared by a hot-press is examined in a 1 MV high-resolution electron microscope. The image contrast reveals that it is isostructural with one of the layered silicates, Akermanite

S. Horiuchi; M. Mitomo

1979-11-01T23:59:59.000Z

400

Reactor accelerator coupling experiments: a feasability study  

E-Print Network [OSTI]

The Reactor Accelerator Coupling Experiments (RACE) are a set of neutron source driven subcritical experiments under temperature feedback conditions. These experiments will involve coupling an accelerator driven neutron source to a TRIGA reactor...

Woddi Venkat Krishna, Taraknath

2006-08-16T23:59:59.000Z

Note: This page contains sample records for the topic "microscopic double-slit experiment" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


401

David Bohms EPR Gedanken Experiment Frank Rioux  

E-Print Network [OSTI]

David Bohms EPR Gedanken Experiment Frank Rioux In 1951 David Bohm proposed a gedanken experiment, Podolsky and Rosen (EPR) in 1935. In this thought experiment a spin1/2 pair is prepared in a singlet state

Rioux, Frank

402

Comparing PRAs with operating experience  

SciTech Connect (OSTI)

Probabilistic Risk Assessment is widely used to estimate the frequencies of rare events, such as nuclear power plant accidents. An obvious question concerns the extent to which PRAs conform to operating experience--that is, do PRAs agree with reality? The authors discuss a formal methodology to address this issue and examine its performance using plant-specific data.

Picard, R.R.; Martz, H.F.

1998-12-01T23:59:59.000Z

403

DOE Corporate Operating Experience Program  

Broader source: Directives, Delegations, and Requirements [Office of Management (MA)]

The Order establishes a DOE wide program for management of operating experience to prevent adverse operating incidents and to expand the sharing of good work practices among DOE sites. Canceled by DOE O 210.2A. Does not cancel other directives.

2006-06-12T23:59:59.000Z

404

BUILDING MOBILE EXPERIENCES Frank Bentley  

E-Print Network [OSTI]

BUILDING MOBILE EXPERIENCES Frank Bentley Principal Staff Research Scientist Motorola Mobility of teaching mobile apps class at MIT ! Strong believer in user-inspired innovation ! Have brought several new? ! Investigating the interaction between people and mobile computing devices ! Creating compelling mobile

Glinz, Martin

405

Current Direct Neutrino Mass Experiments  

E-Print Network [OSTI]

In this contribution we review the status and perspectives of direct neutrino mass experiments. These experiments investigate the kinematics of $\\beta$-decays of specific isotopes ($^3$H, $^{187}$Re, $^{163}$Ho) to derive model-independent information on the averaged electron (anti-) neutrino mass, which is formed by the incoherent sum of the neutrino mass eigenstates contributing to the electron neutrino. We first review the kinematics of $\\beta$-decay and the determination of the neutrino mass, before giving a brief overview of past neutrino mass measurements (SN1987a-ToF studies, Mainz and Troitsk experiments for $^3$H, cryo-bolometers for $^{187}$Re). We then describe the Karlsruhe Tritium Neutrino (KATRIN) experiment which is currently under construction at Karlsruhe Institute of Technology. The large-scale setup will use the MAC-E-Filter principle pioneered earlier to push the sensitivity down to a value of 200 meV(90% C.L.). KATRIN faces many technological challenges that have to be resolved with regar...

Drexlin, G; Mertens, S; Weinheimer, C

2013-01-01T23:59:59.000Z

406

Strange experiments at the AGS  

SciTech Connect (OSTI)

The purpose of this review is to report recent progress in nuclear experiments involving strangeness which have been carried out at the Brookhaven Alternating Gradient Synchrotron over the past three years. These recent developments are noted in three areas: few body systems and dibaryons; strange probes of the nucleus; and associated production of hypernuclei. 9 refs., 3 figs.

Chrien, R.

1990-01-01T23:59:59.000Z

407

apply skills & experience build skills  

E-Print Network [OSTI]

senior apply skills & experience junior build skills sophomore research & execute freshman explore options1 2 3 4 s u p p o r t4-year career action plan parent about the center for career development Remind your student that it is never too soon or too late to seek an internship or summer job. build

Alvarez, Pedro J.

408

Neutrino Oscillations Experiments at Fermilab  

E-Print Network [OSTI]

Neutrino oscillations provide an unique opportunity to probe physics beyond the Standard Model. Fermilab is constructing two new neutrino beams to provide a decicive test of two of the recent positive indications for neutrino oscillations: MiniBOONE experiment will settle the LSND controversy, MINOS will provide detailed studies of the region indicated by the SuperK results.

Adam Para

2000-05-01T23:59:59.000Z

409

Experiments in Physics Physics 1291  

E-Print Network [OSTI]

of the Laboratory The laboratory experiments described in this manual are an important part of your physics course-3 Velocity, Acceleration, and g 35 1-4 Projectile Motion and Conservation of Energy 45 1-5 Conservation. Whenever possible, the material will have been discussed in lecture before you come to the laboratory

Columbia University

410

Experiments in Physics Physics 1291  

E-Print Network [OSTI]

The laboratory experiments described in this manual are an important part of your physics course. Most-8 Projectile Motion and Conservation of Energy 97 1-9 Standing Waves 105 1-10 Specific Heat and Mechanical Equivalent of Heat 115 #12;#12;Introduction 1-0 General Instructions 1 Purpose of the Laboratory

Columbia University

411

MiniCLEAN Dark Matter Experiment  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

MiniCLEAN MiniCLEAN Dark Matter Experiment Investigating the field of high energy physics through experiments that strengthen our fundamental understanding of matter, energy,...

412

Hydrogen Embrittlement Fundamentals, Modeling, and Experiment...  

Broader source: Energy.gov (indexed) [DOE]

Embrittlement Fundamentals, Modeling, and Experiment Hydrogen Embrittlement Fundamentals, Modeling, and Experiment Embrittlement, under static load could be a result of the...

413

Diesel Engine Emission Reduction (DEER) Experiment | Department...  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

Emission Reduction (DEER) Experiment Diesel Engine Emission Reduction (DEER) Experiment Presentation given at DEER 2006, August 20-24, 2006, Detroit, Michigan. Sponsored by the...

414

Fermilab | Science at Fermilab | Experiments & Projects  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Experiments & Projects icon: Energy Frontier Energy Frontier Particle physics experiments at the Energy Frontier explore the fundamental constituents and architecture of the...

415

MagLab Audio Dictionary: Magnet Experiments  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Experiments with Magnets Now Playing: Experiments with Magnets Enable Javascript and Flash to stream the Magnet Minute Greg Boebinger Associated Links Science Highlights: Research...

416

High precision two-dimensional strain mapping in semiconductor devices using nanobeam electron diffraction in the transmission electron microscope  

SciTech Connect (OSTI)

A classical method used to characterize the strain in modern semiconductor devices is nanobeam diffraction (NBD) in the transmission electron microscope. One challenge for this method lies in the fact that the smaller the beam becomes, the more difficult it becomes to analyze the resulting diffraction spot pattern. We show that a carefully designed fitting algorithm enables us to reduce the sampling area for the diffraction patterns on the camera chip dramatically (?1/16) compared to traditional settings without significant loss of precision. The resulting lower magnification of the spot pattern permits the presence of an annular dark field detector, which in turn makes the recording of images for drift correction during NBD acquisition possible. Thus, the reduced sampling size allows acquisition of drift corrected NBD 2D strain maps of up to 3000 pixels while maintaining a precision of better than 0.07%. As an example, we show NBD strain maps of a modern field effect transistor (FET) device. A special filtering feature used in the analysis makes it is possible to measure strain in silicon devices even in the presence of other crystalline materials covering the probed area, which is important for the characterization of the next generation of devices (Fin-FETs).

Baumann, Frieder H., E-mail: fhbauman@us.ibm.com [IBM Microelectronics Division, 2070 Route 52, Hopewell Junction, New York 12533 (United States)

2014-06-30T23:59:59.000Z

417

Sub-barrier enhancement of fusion as compared to a microscopic method in 18O+12C  

E-Print Network [OSTI]

Measurement of the energy dependence of the fusion cross-sec on at sub-barrier energies provides an important test for theoretical models of fusion. To extend the measurement of fusion cross-sections in the sub-barrier domain for the 18O+12C system. Use the new experimental data to confront microscopic calculations of fusion. Evaporation residues produced in fusion of 18O ions with 12C target nuclei were detected with good geometric efficiency and identified by measuring their energy and time-of-flight. Theoretical calculations with a density constrained time dependent Hartree-Fock (DC-TDHF) theory include for the first time the effect of pairing on the fusion cross-section. Comparison of the measured fusion excitation function with the predictions of the DC-TDHF calculations reveal that the experimental data exhibits a smaller decrease in cross-section with decreasing energy than is theoretically predicted. The larger cross-sections observed at the lowest energies measured indicate a larger tunneling probability for the fusion process. This larger probability can be associated with a smaller, narrower fusion barrier than presently included in the theoretical calculations.

T. K. Steinbach; J. Vadas; J. Schmidt; C. Haycraft; S. Hudan; R. T. deSouza; L. T. Baby; S. A. Kuvin; I. Wiedenhöver; A. S. Umar; V. E. Oberacker

2014-07-22T23:59:59.000Z

418

Video microscope and elastic light scattering studies of fast-mode kinetics in surface-mediated spinodal decomposition  

Science Journals Connector (OSTI)

We present time-resolved video microscope and elastic light scattering studies of the domain-pattern selection and growth of spinodal decomposition in critical mixtures of guaiacol and glycerol-water constrained to a cell 0.5 mm thick. The structure functions show two peaks with different kinetics: a slow mode with L(t)?t1/3 and a ‘‘fast mode’’ with L(t)?tb, where b ranges from 1.0 to 1.5 depending on the quench depth (0.03 °C??T?0.35 °C). In this study we discuss our observations of the fast mode’s growth. We have used both elastic light scattering and direct visualization via video microscopy and digital image processing to study the morphology and kinetics of these structures. Parameters such as the quench depth and the treatment of the cell’s windows have been varied, with results suggesting that domain growth proceeds with a power law that is independent of which phase wets the surface.

Christopher Harrison; William Rippard; Andrew Cumming

1995-07-01T23:59:59.000Z

419

Improvement of windowed type environmental-cell transmission electron microscope for in situ observation of gas-solid interactions  

SciTech Connect (OSTI)

We have developed an improved, windowed type environmental-cell (E-cell) transmission electron microscope (TEM) for in situ observation of gas-solid interactions, such as catalytic reactions at atmospheric pressure. Our E-cell TEM includes a compact E-cell specimen holder with mechanical stability, resulting in smoother introduction of the desired gases compared with previous E-cell TEMs. In addition, the gas control unit was simplified by omitting the pressure control function of the TEM pre-evacuation chamber. This simplification was due to the successful development of remarkably tough thin carbon films as the window material. These films, with a thickness of <10 nm, were found to withstand pressure differences >2 atm. Appropriate arrangement of the specimen position inside the E-cell provided quantitatively analyzable TEM images, with no disturbances caused by the windowed films. As an application, we used this E-cell TEM to observe the dynamic shape change in a catalytic gold nanoparticle supported on TiO{sub 2} during the oxidation of CO gas.

Kawasaki, Tadahiro [Graduate School of Engineering, Nagoya University, Furo-cho, Chikusa, Nagoya 464-8603 (Japan); PRESTO-JST, 4-1-8 Honcho, Kawaguchi, Saitama 332-0012 (Japan); Ueda, Kouta [Graduate School of Engineering, Nagoya University, Furo-cho, Chikusa, Nagoya 464-8603 (Japan); Ichihashi, Mikio; Tanji, Takayoshi [EcoTopia Science Institute, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8603 (Japan)

2009-11-15T23:59:59.000Z

420

Pion-Nucleus Microscopic Optical Potential at Intermediate Energies and In-Medium Effect on the Elementary $?N$ Scattering Amplitude  

E-Print Network [OSTI]

Analysis is performed of calculations of the elastic scattering differential cross sections of pions on the $^{28}$Si, $^{40}$Ca, $^{58}$Ni and $^{208}$Pb nuclei at energies from 130 to 290 MeV basing on the microscopic optical potential (OP) constructed as an optical limit of a Glauber theory. Such an OP is defined by the corresponding target nucleus density distribution function and by the elementary $\\pi N$ amplitude of scattering. The three (say, "in-medium") parameters of the $\\pi N$ scattering amplitude: total cross section, the ratio of real to imaginary part of the forward $\\pi N$ amplitude, and the slope parameter, were obtained by fitting them to the data on the respective pion-nucleus cross sections calculated by means of the corresponding relativistic wave equation with the above OP. A difference is discussed between the best-fit "in-medium" parameters and the "free" parameters of the $\\pi N$ scattering amplitudes known from the experimental data on scattering of pions on free nucleons.

E. V. Zemlyanaya; V. K. Lukyanov; K. V. Lukyanov; E. I. Zhabitskaya; M. V. Zhabitsky

2012-10-03T23:59:59.000Z

Note: This page contains sample records for the topic "microscopic double-slit experiment" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


421

A new technique for tritium imaging and profiling using a computer aided--video enhanced microscope system for metallographic analysis  

SciTech Connect (OSTI)

Recent advances in image enhancement and image processing have made ultra-low-light microscopy a reality. Currently available instrumentation allows imaging of ''individual'' photons with a tremendous dynamic range of one to 10/sup 9/ photons/mm/sup 2//sec. This capability allows for the development of tritium imaging techniques based on different basic principles than previously employed. Previous autoradiographic techniques for this purpose used photographic emulsions which are chemically reactive with many metals and for good resolution required in-situ processing in chemical solutions which can also chemically affect the samples or emulsion characteristics. The new technique makes use of optically transparent thin films of relatively chemically inert scintillating compounds applied to metallographically prepared samples. The light given off by these scintillating compounds can now be imaged and quantified using the new Video Intensified Microscope (VIM) System. This allows the location of the tritium to be imaged as well as the corresponding microstructure. In addition, special containers have been designed and built to allow highly radioactive or pyrophoric samples with high levels of off-gassing to be evaluated. 5 refs., 10 figs.

Downs, G.L.

1989-01-01T23:59:59.000Z

422

Tunneling spectroscopy study of YBa2Cu3O7 thin films using a cryogenic scanning tunneling microscope  

Science Journals Connector (OSTI)

We have measured reproducible tunneling spectra on YBa2Cu3O7 (Tc?85 K) thin films (thickness ?2 ?m) with a cryogenic scanning tunneling microscope. We find that the I-V curves are generally of three types. The most common type, featured in a large majority of the data, shows a region of high conductance at zero bias. The amplitude of this region is inversely proportional to the tunneling resistance between the tip and sample. It is possible that this can be explained in terms of Josephson effects within the films, although an alternative is given based on electronic self-energy corrections. Data showing capacitive charging steps are analyzed in terms of two ultrasmall tunnel junctions in series.. Theoretical fits to the data give specific values of the junction parameters that are consistent with the assumed geometry of the tip probing an individual grain of the film. The third type of I-V curves exhibits negative differential resistance. We conclude that this phenomenon is probably due to tunneling to localized states in the surface oxide. We also present and discuss data with energy-gap-like behavior; the best example gives ? to be about 27 mV.

R. Wilkins, M. Amman, R. E. Soltis, E. Ben-Jacob, and R. C. Jaklevic

1990-05-01T23:59:59.000Z

423

The Compass Experiment at CERN  

SciTech Connect (OSTI)

The COMPASS experiment at the CERN SPS has a broad physics program focused on the study of the spin structure of the nucleon and on hadron spectroscopy. Key measurements for the spin program are the gluon contribution to the spin of the nucleon, flavor dependent quark spin distribution, and the measurement of the transverse spin structure function. The apparatus consists of a two-stage spectrometer designed for high data rates and equipped with high-resolution tracking, particle identification, electromagnetic and hadronic calorimetry. Data taking has started in 2002. Following the CERN SPS shut down in 2005, the experiment will resume data taking in 2006 and is planned to continue (at least) until 2010. Few hundreds of Terabytes of data are put on tape each year. Out of this large amount of data first important physics results have been obtained.

Magnon, A. [DAPNIA/SPhN, CEA-Saclay, F91191 Gif-Sur-Yvette Cedex (France)

2005-02-10T23:59:59.000Z

424

Human Radiation Experiments: Related Sites  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Experiment Experiment Related Sites Related Links Home Roadmap What's New Search HREX Multimedia Related Sites Federal DOE DOE Sites & National Laboratories Federal Other The following are organizations which provide related information and links to databases, electronic documents, and servers. FEDERAL - DOE U.S. Department of Energy (DOE) homepage (http://www.doe.gov/)contains information on DOE's Departmental Resources, Programs, Offices, National Labs and other DOE related topics. DOE's Environment, Safety and Health (ES&H) Technical Information Services (TIS) homepage (http://nattie.eh.doe.gov/) is a collection of information services designed to provide safety and health professionals with reliable, accurate and current information to assist them in performing their jobs.

425

UNIRIB Participant Experiences: Cara Jost  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Cara Jost Cara Jost Cara Jost Cara Jost Cara Jost is a Ph.D. student in chemistry from the University of Mainz in Germany, and is involved with ion source development at the University Radioactive Ion Beam (UNIRIB) consortium as a research scholar. Jost and UNIRIB team members are researching new ways to develop radioactive ion beams for the Holifield Radioactive Ion Beam Facility (HRIBF) at Oak Ridge National Laboratory. Below is a question and answer dialog about Jost's experience in Oak Ridge. The video featured on the right side of this page also spotlights Jost's experience with UNIRIB. What is your research focus at UNIRIB? My focus is on chemical reactions in the transfer line of the target-ion source, which can be used to improve the purity of radioactive beams.

426

Practical experience with Title V  

SciTech Connect (OSTI)

Having prepared numerous Title V permit applications and applications for synthetic minor status, the do`s and don`ts of this experience are evaluated. The philosophy for what goes into the application is reviewed, with special regard to the EPA {open_quotes}White Paper{close_quotes} on streamlining the process. The pros and cons of accepting and applying for synthetic minor status are evaluated.

Hoffnagle, G.F. [TRC Environmental, Windsor, CT (United States)

1996-12-31T23:59:59.000Z

427

Final Report: Levitated Dipole Experiment  

SciTech Connect (OSTI)

Since the very first experiments with the LDX, research progress was rapid and significant. Initial experiments were conducted with the high-field superconducting coil suspended by three thin rods. These experiments produced long-pulse, quasi-steady-state microwave discharges, lasting more than 10 s, having peak beta values of 20% [Garnier et al., Physics of Plasmas, 13 (2006) 056111]. High- beta, near steady-state discharges have been maintained in LDX for more than 20 seconds, and this capability made LDX the longest pulse fusion confinement experiment operating in the U.S. fusion program. A significant measure of progress in the LDX research program was the routine investigation of plasma confinement with a magnetically-levitated dipole and the resulting observations of confinement improvement. In both supported and levitated configurations, detailed measurements were made of discharge evolution, plasma dynamics and instability, and the roles of gas fueling, microwave power deposition profiles, and plasma boundary shape. High-temperature plasma was created by multi frequency electron cyclotron resonance heating at 2.45 GHz, 6.4 GHz, 10.5 GHz and 28 GHz allowing control of heating profiles. Depending upon neutral fueling rates, the LDX discharges contain a fraction of energetic electrons, with mean energies above 50 keV. Depending on whether or not the superconducting dipole was levitated or supported, the peak thermal electron temperature was estimated to exceed 500 eV and peak densities to approach 1e18 m?3. We have found that levitation causes a strong inwards density pinch [Boxer et al., Nature Physics, 6 (2010) 207] and we have observed the central plasma density increase dramatically indicating a significant improvement in the confinement of a thermal plasma species.

Kesner, Jay [Massachusetts Institute of Technology; Mauel, Michael [Columbia University

2013-03-10T23:59:59.000Z

428

AMIE (ACRF MJO Investigation Experiment)  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

AMIE AMIE (ACRF MJO Investigation Experiment) Planning Meeting AMIE Science Steering Committee Chuck Long, Tony DelGenio, Bill Gustafson, Bob Houze, Mike Jensen, Steve Klein, Ruby Leung, Xaihong Liu, Ed Luke, Peter May, Sally McFarlane, Pat Minnis, Courtney Schumacher, Andy Vogelmann, Yi Wang, Xiaoqing Wu, Shaohong Xie Agenda * Proposal due May 1 !!!!!! * Primary purpose of this meeting is discussions and planning in support of

429

AGS experiments: 1990, 1991, 1992. Ninth edition  

SciTech Connect (OSTI)

This report contains a description of the following: AGS Experimental Area - High Energy Physics FY 1993 and Heavy Ion Physics FY 1993; Table of Beam Parameters and Fluxes; Experiment Schedule ``as run``; Proposed 1993 Schedule; A listing of experiments by number; Two-page summaries of each experiment begin here, also ordered by number; Publications of AGS Experiments; and List of AGS Experimenters.

Depken, J.C.

1993-04-01T23:59:59.000Z

430

HFIR Experiment Facilities | ORNL Neutron Sciences  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Experiment Facilities Experiment Facilities HFIR Experiment Facilities Neutron Scattering Facilities Target Positions Experiment Facilities in the Beryllium Reflector Large Removable Beryllium Facilities Small Removable Beryllium Facilities Control-Rod Access Plug Facilities Small Vertical Experiment Facilities Large Vertical Experiment Facilities Hydraulic Tube Facility Peripheral Target Positions Neutron Activation Analysis (NAA) Laboratory and Pneumatic Tube Facilities Slant Engineering Facilities Gamma Irradiation Facility Quality Assurance Requirements Contact Information Neutron Scattering Facilities The fully instrumented HFIR will eventually include 15 state-of-the-art neutron scattering instruments, seven of which will be designed exclusively for cold neutron experiments, located in a guide hall south of the reactor

431

A Better Microscope  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

microscopio mejor microscopio mejor Avanzar Volver Principal ESTOY PERDIDO!!! Cuando Ud. utiliza ondas para detectar el mundo físico el problema con el que se enfrenta es que la calidad de la imagen está limitada por la longitud de onda que usted use. Nuestros ojos son sensibles a la luz visible, que tiene una longitud de onda del orden de los 0.0000005 metros. Esta longitud de onda es lo suficientemente pequeña como para que en nuestra vida diaria no notemos el problema de resolución asociado con la longitud de onda, ya que en general no necesitamos ver objetos que tengan tamaños del orden de los 0.0000005 metros. Sin embargo, la longitud de onda de la luz visible es demasiado grande para analizar cualquier objeto más pequeño que una célula. Para observar objetos bajo grandes aumentos, se deben usar ondas con menor longitud de

432

Astronomy by microscope  

Science Journals Connector (OSTI)

......isotopic composition, enriched in both light and heavy...organic macromolecule, highly cross-linked, with...portion of them are highly-enriched in deuterium, carbon...energy densities and inventory of the material balance......

Monica M Grady

2009-08-01T23:59:59.000Z

433

MICROSCOPIC USES OF NANOGOLD.  

SciTech Connect (OSTI)

Gold has been used for immunocytochemistry since 1971 when Faulk and Taylor discovered adsorption of antibodies to colloidal gold. It is an ideal label for electron microscopy (EM) due to its high atomic number, which scatters electrons efficiently, and the fact that preparative methods have been developed to make uniform particles in the appropriate size range of 5 to 30 nm. Use in light microscopy (LM) generally requires silver enhancement (autometallography; AMG) of these small gold particles. Significant advances in this field since that time have included a better understanding of the conditions for best antibody adsorption, more regular gold size production, adsorption of other useful molecules, like protein A, and advances in silver enhancement. Many studies have also been accomplished showing the usefulness of these techniques to cell biology and biomedical research. A further advance in this field was the development of Nanogold{trademark}, a 1.4 nm gold cluster. A significant difference from colloidal gold is that Nanogold is actually a coordination compound containing a gold core covalently linked to surface organic groups. These in turn may be covalently attached to antibodies. This approach to immunolabeling has several advantages compared to colloidal gold such as vastly better penetration into tissues, generally greater sensitivity, and higher density of labeling. Since Nanogold is covalently coupled to antibodies, it may also be directly coupled to almost any protein, peptide, carbohydrate, or molecule of interest, including molecules which do not adsorb to colloidal gold. This increases the range of probes possible, and expands the applications of gold labeling.

HAINFELD,J.F.POWELL,R.D.FURUYA,F.R.

2003-04-17T23:59:59.000Z

434

The Student's Microscope  

Science Journals Connector (OSTI)

... with a plano-convex lens above it. The plane surface of the lens, slightly roughened, faces downwards. The distance between the convex upper surface of the lens and the ... (or nearly as high) as possible1, or put in such a position that the roughened surface of the lamp lens does not obtrude on the field of view2. Centring ...

JOHN R. BAKER

1967-07-15T23:59:59.000Z

435

What's new – microscopes  

Science Journals Connector (OSTI)

... of organic and inorganic materials, oxidation of metal powders, the behaviour on ignition of pyrotechnic mixtures.

1977-06-23T23:59:59.000Z

436

Electron microscope studies  

SciTech Connect (OSTI)

This year our laboratory has continued to make progress in the design of electron-optical systems, in the study of structure-function relationships of large multi-subunit proteins, in the development of new image processing software and in achieving a workable sub-angstrom STEM. We present an algebraic approach to the symmetrical Einzel (unipotential) lens wherein we simplify the analysis by specifying a field shape that meets some preferred set of boundary or other conditions and then calculate the fields. In a second study we generalize this approach to study of three element electrostatic lenses of which the symmetrical Einzel lens is a particular form. The purpose is to develop a method for assisting in the design of a lens for a particular purpose. In our biological work we study a stable and functional dodecameric complex of globin chains from the hemoglobin of Lumbricus terrestris. This is a complex lacking the linker'' subunit first imaged in this lab and required for maintenance of the native structure. In addition, we do a complete work-up on the hemoglobin of the marine polychaete Eudistylia vancouverii demonstrating the presence of a hierarchy of globin complexes. We demonstrate stable field-emission in the sub-angstrom STEM and the preliminary alignment of the beam. We continue our exploration of a algorithms for alignment of sequences of protein and DNA. Our computer facilities now include four second generation RISC workstations and we continue to take increasing advantage of the floating-point and graphical performance of these devices.

Crewe, A.V.; Kapp, O.H.

1991-06-01T23:59:59.000Z

437

the microscopic description  

E-Print Network [OSTI]

at the Bragg peak Penetration Energy Stopping power dE/dx Electronic stopping Nuclear stopping Insulator gap How is energy deposited (ions...) Water Relativedose(%) Depth (mm) Energy Dose and dosimetry Energy electronic stopping Low Energy nuclear stopping Direct DNA ionization (photons, electron impact

Giraud, Olivier

438

Ramsey Experiments Using Neutron Beams  

Science Journals Connector (OSTI)

Abstract Ramsey's technique of separated oscillatory fields adapted to cold neutron beams is a very sensitive method to probe for spin- dependent interactions of neutrons with magnetic and pseudomagnetic fields. In the last couple of years several distinctive experiments using this technique have been performed, e.g. to determine the incoherent neutron scattering length of the deuteron, to perform polarized neutron imaging of magnetic fields and samples, and lately, to search for new light spin-1 bosons. Here, some of these results are reviewed and possible future measurements with respect to a pulsed neutron source are presented.

Florian M. Piegsa

2014-01-01T23:59:59.000Z

439

Physics with the ALICE experiment  

E-Print Network [OSTI]

ALICE experiment at LHC collects data in pp collisions at $\\sqrt{s}$=0.9, 2.76 and 7 TeV and in PbPb collisions at 2.76 TeV. Highlights of the detector performance and an overview of experimental results measured with ALICE in pp and AA collisions are presented in this paper. Physics with proton-proton collisions is focused on hadron spectroscopy at low and moderate $p_T$. Measurements with lead-lead collisions are shown in comparison with those in pp collisions, and the properties of hot quark matter are discussed.

Yuri Kharlov; for the ALICE collaboration

2012-03-09T23:59:59.000Z

440

Estimation of the breakup cross sections in $^6$He+$^{12}$C reaction within high-energy approximation and microscopic optical potential  

E-Print Network [OSTI]

The breakup cross sections in the reaction $^6$He+$^{12}$C are calculated at about 40 MeV/nucleon using the high-energy approximation (HEA) and with the help of microscopic optical potentials (OP) of interaction with the target nucleus $^{12}$C of the projectile nucleus fragments $^4$He and 2n. Considering the di-neutron $h$=2n as a single particle the relative motion $h\\alpha$ wave function is estimated so that to explain both the separation energy of $h$ in $^6$He and the rms radius of the latter. The stripping and absorbtion total cross sections are calculated and their sum is compared with the total reaction cross section obtained within a double-folding microscopic OP for the $^6$He+$^{12}$C scattering. It is concluded that the breakup cross sections contribute in about 50% of the total reaction cross section.

E. V. Zemlyanaya; V. K. Lukyanov; K. V. Lukyanov

2010-12-06T23:59:59.000Z

Note: This page contains sample records for the topic "microscopic double-slit experiment" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


441

Introduction of the CDEX experiment  

E-Print Network [OSTI]

Weakly Interacting Massive Particles (WIMPs) are the candidates of dark matter in our universe. Up to now any direct interaction of WIMP with nuclei has not been observed yet. The exclusion limits of the spin-independent cross section of WIMP-nucleon which have been experimentally obtained is about 10^{-7}pb at high mass region and only 10^{-5}pb} at low mass region. China Jin-Ping underground laboratory CJPL is the deepest underground lab in the world and provides a very promising environment for direct observation of dark matter. The China Dark Matter Experiment (CDEX) experiment is going to directly detect the WIMP flux with high sensitivity in the low mass region. Both CJPL and CDEX have achieved a remarkable progress in recent two years. The CDEX employs a point-contact germanium semi-conductor detector PCGe whose detection threshold is less than 300 eV. We report the measurement results of Muon flux, monitoring of radioactivity and Radon concentration carried out in CJPL, as well describe the structure ...

Kang, Ke-Jun; Li, Jin; Li, Yuan-Jing; Yue, Qian; Bai, Yang; Bi, Yong; Chang, Jian-Ping; Chen, Nan; Chen, Ning; Chen, Qing-Hao; Chen, Yun-Hua; Deng, Zhi; Du, Qiang; Gong, Hui; Hao, Xi-Qing; He, Hong-Jian; He, Qing-Ju; Hu, Xin-Hui; Huang, Han-Xiong; Jiang, Hao; Li, Jian-Min; Li, Xia; Li, Xin-Ying; Li, Xue-Qian; Li, Yu-Lan; Liu, Shu-Kui; Liu, Ya-Bin; Lu, Lan-Chun; Ma, Hao; Qin, Jian-Qiang; Ren, Jie; Ren, Jing; Ruan, Xi-Chao; Shen, Man-Bin; Su, Jian; Tang, Chang-Jian; Tang, Zhen-Yu; Wang, Ji-Min; Wang, Qing; Wang, Xu-Feng; Wu, Shi-Yong; Wu, Yu-Cheng; Xianyu, Zhong-Zhi; Xing, Hao-Yang; Xu, Xun-Jie; Xu, Yin; Xue, Tao; Yang, Li-Tao; Yi, Nan; Yu, Hao; Yu, Chun-Xu; Zeng, Xiong-Hui; Zeng, Zhi; Zhang, Lan; Zhang, Guang-Hua; Zhao, Ming-Gang; Zhong, Su-Ning; Zhou, Jin; Zhou, Zu-Ying; Zhu, Jing-Jun; Zhu, Wei-Bin; Zhu, Xue-Zhou; Zhu, Zhong-Hua

2013-01-01T23:59:59.000Z

442

Special Experiments: AES-UES  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Special Experiments at the APS Special note is made of the following experimental activities. (Updated 2/19/2012 17:00) BEAMLINE DATES SPOKESPERSON COMMENTS 2BM-B rad #92404 2/24- 2/27 Patrick LaReviere U of C *Approvals pending *No special procedure, samples must be surveyed before and after experiment by APS-HP. 10ID-B #92409 2/29- 3/05 Ken Kemner ANL-203 *Approvals pending *Samples may be left unattended for up to 12 hours with beam ON when hutch door is secured with lock and chain. 10BM-B rad #92408 3/01- 3/06 Ken Kemner ANL-203 *Approvals Pending *Samples may be left unattended for up to 12 hours with beam ON when hutch door is secured with lock and chain. 1ID-B rad #91277 3/07- 3/12 Don Brown- LANL Mark Daymond Queen's University *Approvals Pending 3ID-B #92107 3/10- 3/19 Valentin Iota UNLV

443

Post-irradiation Examination of the AGR-1 Experiment: Plans and Preliminary Results  

SciTech Connect (OSTI)

Abstract – The AGR-1 irradiation experiment contains seventy-two individual cylindrical fuel compacts (25 mm long x 12.5 mm diameter) each containing approximately 4100 TRISO-coated uranium oxycarbide fuel particles. The experiment accumulated 620 effective full power days in the Advanced Test Reactor at the Idaho National Laboratory with peak burnups exceeding 19% FIMA. An extensive post-irradiation examination campaign will be performed on the AGR-1 fuel in order to characterize the irradiated fuel properties, assess the in-pile fuel performance in terms of coating integrity and fission metals release, and determine the fission product retention behavior during high temperature accident testing. PIE experiments will include dimensional measurements of fuel and irradiated graphite, burnup measurements, assessment of fission metals release during irradiation, evaluation of coating integrity using the leach-burn-leach technique, microscopic examination of kernel and coating microstructures, and accident testing of the fuel in helium at temperatures up to 1800°C. Activities completed to date include opening of the irradiated capsules, measurement of fuel dimensions, and gamma spectrometry of selected fuel compacts.

Paul Demkowicz

2001-10-01T23:59:59.000Z

444

The scanning soft X-ray microscope at Hasylab: imaging and spectroscopy of photoelectrons, photoluminescence, desorbed ions, reflected, scattered and transmitted light  

Science Journals Connector (OSTI)

The scanning soft X-ray microscope operating at Hasylab/Desy has been developed to combine lateral and temporal resolution, tunability and various conventional spectroscopy techniques. Different mirror optics are used to form a microprobe in the energy range 15–1500 eV. A grazing incidence ellipsoidal mirror provides a resolution of 1 ?m over the entire energy range, and in the vacuum ultraviolet region below 30 eV, 0.15 ?m can be achieved with a Pt-coated Schwarzschild objective. Due to the large working distance of the optics used, the detection and analysis of several surface signals are comparatively simple. Detectors and spectrometers for photoelectrons, luminescence, fluorescence, desorbed ions, reflected, scattered and transmitted light are built in permanently into the microscope. Furthermore, some combinations of the different methods can be used for simultaneous measurements. In this paper the technical developments of recent years are described. A short representation of some exemplary applications will give an insight into the work of our group and illustrate the characteristics of the microscope. The following topics are discussed: cross-luminescence of barium fluoride, visible luminescence and degradation of porous silicon, photoluminescence of ceramics, chemical contrast in photoemission spectroscopy, and Bragg reflection as a contrast mechanism in X-ray microscopy.

J Voss

1997-01-01T23:59:59.000Z

445

Experiment Design and Analysis Guide - Neutronics & Physics  

SciTech Connect (OSTI)

The purpose of this guide is to provide a consistent, standardized approach to performing neutronics/physics analysis for experiments inserted into the Advanced Test Reactor (ATR). This document provides neutronics/physics analysis guidance to support experiment design and analysis needs for experiments irradiated in the ATR. This guide addresses neutronics/physics analysis in support of experiment design, experiment safety, and experiment program objectives and goals. The intent of this guide is to provide a standardized approach for performing typical neutronics/physics analyses. Deviation from this guide is allowed provided that neutronics/physics analysis details are properly documented in an analysis report.

Misti A Lillo

2014-06-01T23:59:59.000Z

446

ARM MJO Investigation Experiment on  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

5 5 ARM MJO Investigation Experiment on Gan Island (AMIE-Gan) Science Plan October 2011-March 2012 C Long Principal Investigator A Del Genio P May M Deng S McFarlane X Fu P Minnis W Gustafson C Schumacher R Houze A Vogelmann C Jakob Y Wang M Jensen P Webster R Johnson S Xie X Liu C Zhang E Luke April 2011 DISCLAIMER This report was prepared as an account of work sponsored by the U.S. Government. Neither the United States nor any agency thereof, nor any of their employees, makes any warranty, express or implied, or assumes any legal liability or responsibility for the accuracy, completeness, or usefulness of any information, apparatus, product, or process disclosed, or represents that its use would not infringe privately owned rights.

447

AMIE (ARM MJO Investigation Experiment):  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

7 7 AMIE (ARM MJO Investigation Experiment): Observations of the Madden-Julian Oscillation for Modeling Studies Science Plan ARM Climate Research Facility Tropical Western Pacific Manus Site October 2011-March 2012 C Long Principal Investigator A DelGenio P May W Gustafson S McFarlane R Houze P Minnis C Jakob C Schumacher M Jensen A Vogelmann S Klein Y Wang L Ruby Leung X Wu X Liu S Xie E Luke March 2010 DISCLAIMER This report was prepared as an account of work sponsored by the U.S Government Neither the United States nor any agency thereof, nor any of their employees, makes any warranty, express or implied, or assumes any legal liability or responsibility for the accuracy, completeness, or usefulness of any information, apparatus, product, or process disclosed,

448

Experiment Profile: Mu2e  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Mu2e Mu2e NAME: Muon-to-electron conversion, or Mu2e WHAT IS THE EXPERIMENT LOOKING FOR? A muon that does not follow the traditional weak- force decay pattern into a lighter electron and two neutrinos, but converts wholly into an electron. WHAT WILL THIS TELL US ABOUT THE WORLD? * Observing Mu2e conversion would point the way to a unification of all the forces of nature controlling the interactions of matter. This unification of the four existing forces we observe today - gravity, the electromagnetic force, and the weak and strong forces - is considered Albert Einstein's dream of "grand unification. * Finding signs of this "grand unification" could explain how the universe evolved from being

449

Rationalization of EPR Coincidence Experiments  

E-Print Network [OSTI]

Coincidence experiments on EPR pairs show strong violations of Bell's Inequalities at certain filter settings which is widely believed to mean that local hidden variable models cannot explain these results. In this paper it is shown that the 'non-separable' singlet density matrix can be represented as a sum of separable density matrices which are products of individual non-hermitian spin operator states. This decomposition is consistent with the intuitive notion that after separation from the singlet the two physical systems should be described by a product state. In spite of the non-hermiticity, the values of the relevant spin observables are real. A new local hidden variable model inspired by this decomposition is discussed.

B. C. Sanctuary

2007-10-10T23:59:59.000Z

450

The INEL beryllium multiplication experiment  

SciTech Connect (OSTI)

The experiment to measure the multiplication of 14-MeV neutrons in bulk beryllium has been completed. The experiment consists of determining the ratio of {sup 56}Mn activities induced in a large manganese bath by a central 14-MeV neutron source, with and without a beryllium sample surrounding the source. In the manganese bath method a neutron source is placed at the center of a totally-absorbing aqueous solution of MnSo{sub 4}. The capture of neutrons by Mn produces a {sup 56}Mn activity proportional to the emission rate of the source. As applied to the measurement of the multiplication of 14- MeV neutrons in bulk beryllium, the neutron source is a tritium target placed at the end of the drift tube of a small deuteron accelerator. Surrounding the source is a sample chamber. When the sample chamber is empty, the neutrons go directly to the surrounding MnSO{sub 4} solution, and produce a {sup 56}Mn activity proportional to the neutron emission rate. When the chamber contains a beryllium sample, the neutrons first enter the beryllium and multiply through the (n,2n) process. Neutrons escaping from the beryllium enter the bath and produce a {sup 56}Mn activity proportional to the neutron emission rate multiplied by the effective value of the multiplication in bulk beryllium. The ratio of the activities with and without the sample present is proportional to the multiplication value. Detailed calculations of the multiplication and all the systematic effects were made with the Monte Carlo program MCNP, utilizing both the Young and Stewart and the ENDF/B-VI evaluations for beryllium. Both data sets produce multiplication values that are in excellent agreement with the measurements for both raw and corrected values of the multiplication. We conclude that there is not real discrepancy between experimental and calculated values for the multiplication of neutrons in bulk beryllium. 12 figs., 11 tabs., 18 refs.

Smith, J.R.; King, J.J.

1991-03-01T23:59:59.000Z

451

Suspended sediment erosion in laboratory flume experiments  

E-Print Network [OSTI]

Laboratory flume experiments are used to examine the role of suspended sediment abrasion in bedrock channel erosion. A range of topographies was used, from a planar bed to a sinuous and scalloped inner channel. Experiments ...

Cornell, Katrina Muir

2007-01-01T23:59:59.000Z

452

Building Knowledge through Families of Experiments  

E-Print Network [OSTI]

Building Knowledge through Families of Experiments Victor R. Basili, Fellow, IEEE, Forrest Shull, and build models that represent the common observations about the discipline. This paper discusses building knowledge in an incremental manner through the replication of experiments within families

Basili, Victor R.

453

Status of the MAJORANA DEMONSTRATOR experiment  

SciTech Connect (OSTI)

The MAJORANA DEMONSTRATOR neutrinoless double beta-decay experiment is currently under construction at the Sanford Underground Research Facility in South Dakota, USA. An overview and status of the experiment are given.

Martin, R. D. [Nuclear Science Division, Lawrence Berkeley National Laboratory, Berkeley, CA, USA and Department of Physics, University of South Dakota, Vermillion, SD (United States); Abgrall, N.; Chan, Y-D.; Hegai, A.; Mertens, S.; Poon, A. W. P.; Vetter, K. [Nuclear Science Division, Lawrence Berkeley National Laboratory, Berkeley, CA (United States); Aguayo, E.; Fast, J. E.; Hoppe, E. W.; Kouzes, R. T.; LaFerriere, B. D.; Orrell, J. L.; Overman, N. R.; Soin, A. [Pacific Northwest National Laboratory, Richland, WA (United States); Avignone III, F. T. [Department of Physics and Astronomy, University of South Carolina, Columbia, SC, USA and Oak Ridge National Laboratory, Oak Ridge, TN (United States); Barabash, A. S.; Konovalov, S. I.; Yumatov, V. [Institute for Theoretical and Experimental Physics, Moscow (Russian Federation); Bertrand, F. E. [Oak Ridge National Laboratory, Oak Ridge, TN (United States); and others

2014-06-24T23:59:59.000Z

454

The discriminative power of patient experience surveys  

Science Journals Connector (OSTI)

Comparisons of patient experiences between providers are increasingly used as an index of performance. The present study describes the ability of patient experience surveys to discriminate between healthcare p...

Dolf de Boer; Diana Delnoij; Jany Rademakers

2011-12-01T23:59:59.000Z

455

Fermilab at Work | Experiments and Projects  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Contacts (PDF) Current Experiments CDF CDMS (E891) COUPP Experiment (E961) Dark Energy Survey DarkSide (E1000) DZero Holometer (E990) MicroBooNE MINERvA (E938) MINOSMINOS+...

456

Solar energy experiment for beginning chemistry  

Science Journals Connector (OSTI)

Solar energy experiment for beginning chemistry ... This article introduces an experiment that incorporates chemical applications of solar energy into the curriculum. ... Involving Students in a Collaborative Project To Help Discover Inexpensive, Stable Materials for Solar Photoelectrolysis ...

Clyde E. Davis

1983-01-01T23:59:59.000Z

457

ALSNews Vol. 284  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

4 Print 4 Print In This Issue Director's Update: FY08 Budget UEC Corner: Looking Forward to the BES Review and Beyond Topo II: An Enzyme Target For Antibacterial and Cancer Drugs The H2 Double-Slit Experiment: Where Quantum and Classical Physics Meet Register Now for the 2008 Beam Instrumentation Workshop Operations News Links Possible Breakthrough for Sufferers of Huntington's Breaking Down Huntington's Disease One Protein At A Time DOE's Disappointing Budget Makes It Harder to Stick to the Basics More Information About ALSNews ALSNews Archive To subscribe/unsubscribe, email This e-mail address is being protected from spambots. You need JavaScript enabled to view it . Director's Update: FY08 Budget This e-mail address is being protected from spambots. You need JavaScript enabled to view it

458

Solar energy storage: A demonstration experiment  

Science Journals Connector (OSTI)

Solar energy storage: A demonstration experiment ... A demonstration of a phase transition that can be used for heat storage. ...

Howard S. Kimmel; Reginald P. T. Tomkins

1979-01-01T23:59:59.000Z

459

Current experiments in elementary particle physics. Revision  

SciTech Connect (OSTI)

This report contains summaries of 568 current and recent experiments in elementary particle physics. Experiments that finished taking data before 1988 are excluded. Included are experiments at BEPC (Beijing), BNL, CEBAF, CERN, CESR, DESY, FNAL, INS (Tokyo), ITEP (Moscow), IUCF (Bloomington), KEK, LAMPF, Novosibirsk, PNPI (St. Petersburg), PSI, Saclay, Serpukhov, SLAC, and TRIUMF, and also several underground and underwater experiments. Instructions are given for remote searching of the computer database (maintained under the SLAC/SPIRES system) that contains the summaries.

Galic, H. [Stanford Linear Accelerator Center, Menlo Park, CA (United States); Armstrong, F.E. [Lawrence Berkeley Lab., CA (United States); von Przewoski, B. [Indiana Univ. Cyclotron Facility, Bloomington, IN (United States)] [and others

1994-08-01T23:59:59.000Z

460

Experiments with Wind to Produce Energy  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Nat EXPERIMENTS WITH WIND TO PRODUCE ENERGY Curriculum: Wind Power (simple machines, weatherclimatology, aerodynamics, leverage, mechanics, atmospheric pressure, and energy...

Note: This page contains sample records for the topic "microscopic double-slit experiment" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


461

SYNCHROTRONS FOR HEAVY IONS - BEVALAC EXPERIENCE  

E-Print Network [OSTI]

and nuclear science applications. Then we shall talk about our experience in interleaving these on two research programs,

Grunder, H.A.

2010-01-01T23:59:59.000Z

462

Janus Experiments: Data from Mouse Irradiation Experiments 1972 - 1989  

DOE Data Explorer [Office of Scientific and Technical Information (OSTI)]

The Janus Experiments, carried out at Argonne National Laboratory from 1972 to 1989 and supported by grants from the US Department of Energy, investigated the effects of neutron and gamma radiation on mouse tissues primarily from B6CF1 mice. 49,000 mice were irradiated: Death records were recorded for 42,000 mice; gross pathologies were recorded for 39,000 mice; and paraffin embedded tissues were preserved for most mice. Mouse record details type and source of radiation [gamma, neutrons]; dose and dose rate [including life span irradiation]; type and presence/absence of radioprotector treatment; tissue/animal morphology and pathology. Protracted low dose rate treatments, short term higher dose rate treatments, variable dose rates with a same total dose, etc. in some cases in conjunction with radioprotectors, were administered. Normal tissues, tumors, metastases were preserved. Standard tissues saved were : lung, liver, spleen, kidney, heart, any with gross lesions (including mammary glands, Harderian gland with eye, adrenal gland, gut, ovaries or testes, brain and pituitary, bone). Data are searchable and specimens can be obtained by request.

463

Nuclear fuel scoping: implementation of a four node per assembly algorithm as the neutronic module for microscope  

E-Print Network [OSTI]

, . APPENDIX B INPUT FOR TEST CASES . SAMPLE INPUT FOR ONE NODE PER ASSEMBLY. . . . SAMPLE INPUT FOR FOUR NODES PER ASSEMBLY. . . APPENDIX C OUTPUT FOR TEST CASES SAMPLE OUTPUT FOR ONE NODE PER ASSEMBLY. . . SAMPLE OUTPUT FOR FOUR NODES PER ASSEMBLY... on which to simulate and test out some of his ideas or intuitions regarding ways of enhancing fuel procurement and bumup. It allows him to easily and cheaply experiment with the decision variables associated with fuel procurement and burnup, and to see...

Shofolu, Babatunde Olayemi

2012-06-07T23:59:59.000Z

464

AGS experiments -- 1991, 1992, 1993. Tenth edition  

SciTech Connect (OSTI)

This report contains: (1) FY 1993 AGS schedule as run; (2) FY 1994--95 AGS schedule; (3) AGS experiments {ge} FY 1993 (as of 30 March 1994); (4) AGS beams 1993; (5) AGS experimental area FY 1991 physics program; (6) AGS experimental area FY 1992 physics program; (7) AGS experimental area FY 1993 physics program; (8) AGS experimental area FY 1994 physics program (planned); (9) a listing of experiments by number; (10) two-page summaries of each experiment; (11) listing of publications of AGS experiments; and (12) listing of AGS experiments.

Depken, J.C.

1994-04-01T23:59:59.000Z

465

Today and Future Neutrino Experiments at Krasnoyarsk Nuclear Reactor  

E-Print Network [OSTI]

The results of undergoing experiments and new experiment propositions at Krasnoyarsk underground nuclear reactor are presented

Yu. V. Kozlov; S. V. Khalturtsev; I. N. Machulin; A. V. Martemyanov; V. P. Martemyanov; A. A. Sabelnikov; V. G. Tarasenkov; E. V. Turbin; V. N. Vyrodov; L. A. Popeko; A. V. Cherny; G. A. Shishkina

1999-12-21T23:59:59.000Z

466

Experience with hydrotreater computer control  

SciTech Connect (OSTI)

Part of a series of articles on actual operating experience with computer control, this article describes the control strategies and results of a hydrotreater computer control project. A new computer-based control system was installed in Gulf Canada's lube oil plant at Clarkson, Ontario. This plant is designed to produce 10 Mbpd of high quality lubricating oils using Gulf's new lube hydrotreating process. The following sections present a process description, a description of the control objectives, the control functions designed to meet those objectives, and a summary of the performance documented to date. In June 1980, Gulf conducted a feasibility study for computer control of their lube oil process, and the results of that study indicated that control of the heart of the process, the hydrotreater reactor and fractionation section, would yield significant economic benefit. In October 1980, Gulf reviewed a detailed design based on the control functions defined in the earlier study. After the desired functions were refined to Gulf's specification, control programming began at the Houston computer staging site. The applications software was demonstrated in Houston in May 1981, and integrated into the same computer on-site at Clarkson in July 1981. The system linked to an existing microprocessorbased hardware data acquisition and control system. Control commissioning and initial tuning were finished by mid-December 1981. Final tuning and testing were done in mid-January 1982, when the project was completed successfully, within budget and ahead of schedule.

Martin, G.D.; Cassaday, K.M.; VanHorn, L.D.

1984-03-01T23:59:59.000Z

467

SAFT-UT field experience  

SciTech Connect (OSTI)

This paper reports on a three-year program at the Battelle Pacific Northwest Laboratory to transfer the synthetic aperture focusing technique (SAFT) technology that was developed at the University of Michigan into the field. A brief overview is given of the program and the field system is described. The main portion of the paper is devoted to the experience of using the SAFT system in a third-party role to aid in resolving inspection inconsistencies between several different UT inservice inspections results for intergranular stress corrosion cracks (IGSCC) in boiling water reactor (BWR) piping. A new method of scanning using a modified tandem technique (called TSAFT) was also developed and successfully employed in the field. The SAFT images made cracks easy to identify and the TSAFT data were easy to interpret for depth sizing. However, the most significant fact about the system is that it did work very well under field conditions even though a number of improvements were identified as a result of each field trip. These improvements are discussed in the paper. 6 refs., 15 figs.

Doctor, S.R.; Crawford, S.L.; Hall, T.E.

1985-03-01T23:59:59.000Z

468

Yuan T. Lee's Crossed Molecular Beam Experiment  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Yuan T. Lee's Crossed Molecular Beam Experiment Yuan T. Lee's Crossed Molecular Beam Experiment Home | Staff | Search | Advisory Committee | User Facilities | Laboratories | Congress | Budget Yuan T. Lee's Crossed Molecular Beam Experiment http://web.archive.org/web/20000902074635/www.er.doe.gov/production/bes/YuanLee_Exp.html (1 of 4)4/7/2006 2:46:13 PM Yuan T. Lee's Crossed Molecular Beam Experiment The above illustration was drawn by Professor Yuan T. Lee, who shared the 1986 Nobel Prize in Chemistry. It shows the design for his crossed molecular beam experiment described in the story beginning on page 27 of "Basic Energy Sciences: Summary of Accomplishments" (DOE/ER-0455P, May 1990); the story is also copied below. The purpose of this experiment was to study the chemical reaction of sodium atoms with oxygen molecules. In the experiment, a beam of sodium atoms (green,

469

LCLS CDR Chapter 3 - Scientific Experiments  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

3 3 Scientific Basis for Optical Systems TECHNICAL SYNOPSIS The LCLS Scientific Advisory Committee (SAC) has recommended experiments in five scientific disciplines for the initial operation of the LCLS. These experiments cover a variety of scientific disciplines: atomic physics, plasma physics, chemistry, biology and materials science. The x-ray optics and detectors needed to verify the LCLS capability to address these five disciplines will be constructed and installed as part of the LCLS project. The experiments are described in detail in the document "LCLS: The First Experiments" referenced earlier. Two classes of experiments are proposed for the LCLS. The first class consists of experiments where the x-ray beam is used to probe the sample, as is done in most experiments at current

470

Deuterium accelerator experiments for APT.  

SciTech Connect (OSTI)

Sandia National Laboratories in California initiated an experimental program to determine whether tritium retention in the tube walls and permeation through the tubes into the surrounding coolant water would be a problem for the Accelerator Production of Tritium (APT), and to find ways to mitigate the problem, if it existed. Significant holdup in the tube walls would limit the ability of APT to meet its production goals, and high levels of permeation would require a costly cleanup system for the cooling water. To simulate tritium implantation, a 200 keV accelerator was used to implant deuterium into Al 6061-T and SS3 16L samples at temperatures and particle fluxes appropriate for APT, for times varying between one week and five months. The implanted samples were characterized to determine the deuterium retention and Permeation. During the implantation, the D(d,p)T nuclear reaction was used to monitor the build-up of deuterium in the implant region of the samples. These experiments increased in sophistication, from mono-energetic deuteron implants to multi-energetic deuteron and proton implants, to more accurately reproduce the conditions expected in APT. Micron-thick copper, nickel, and anodized aluminum coatings were applied to the front surface of the samples (inside of the APT walls) in an attempt to lower retention and permeation. The reduction in both retention and permeation produced by the nickel coatings, and the ability to apply them to the inside of the APT tubes, indicate that both nickel-coated Al 6061-T6 and nickel-coated SS3 16L tubes would be effective for use in APT. The results of this work were submitted to the Accelerator Production of Tritium project in document number TPO-E29-Z-TNS-X-00050, APT-MP-01-17.

Causey, Rion A. (Sandia National Laboratories, Livermore, CA); Hertz, Kristin L. (Sandia National Laboratories, Livermore, CA); Cowgill, Donald F. (Sandia National Laboratories, Livermore, CA)

2005-08-01T23:59:59.000Z

471

Cygnus Performance in Subcritical Experiments  

SciTech Connect (OSTI)

The Cygnus Dual Beam Radiographic Facility consists of two identical radiographic sources with the following specifications: 4-rad dose at 1 m, 1-mm spot size, 50-ns pulse length, 2.25-MeV endpoint energy. The facility is located in an underground tunnel complex at the Nevada Test Site. Here SubCritical Experiments (SCEs) are performed to study the dynamic properties of plutonium. The Cygnus sources were developed as a primary diagnostic for these tests. Since SCEs are single-shot, high-value events - reliability and reproducibility are key issues. Enhanced reliability involves minimization of failure modes through design, inspection, and testing. Many unique hardware and operational features were incorporated into Cygnus to insure reliability. Enhanced reproducibility involves normalization of shot-to-shot output also through design, inspection, and testing. The first SCE to utilize Cygnus, Armando, was executed on May 25, 2004. A year later, April - May 2005, calibrations using a plutonium step wedge were performed. The results from this series were used for more precise interpretation of the Armando data. In the period February - May 2007 Cygnus was fielded on Thermos, which is a series of small-sample plutonium shots using a one-dimensional geometry. Pulsed power research generally dictates frequent change in hardware configuration. Conversely, SCE applications have typically required constant machine settings. Therefore, while operating during the past four years we have accumulated a large database for evaluation of machine performance under highly consistent operating conditions. Through analysis of this database Cygnus reliability and reproducibility on Armando, Step Wedge, and Thermos is presented.

G. Corrow, M. Hansen, D. Henderson, S. Lutz, C. Mitton, et al.

2008-02-01T23:59:59.000Z

472

Towards secondary ion mass spectrometry on the helium ion microscope: An experimental and simulation based feasibility study with He{sup +} and Ne{sup +} bombardment  

SciTech Connect (OSTI)

The combination of the high-brightness He{sup +}/Ne{sup +} atomic level ion source with secondary ion mass spectrometry detection capabilities opens up the prospect of obtaining chemical information with high lateral resolution and high sensitivity on the Zeiss ORION helium ion microscope. The analytical performance in terms of sputtering yield, useful yield, and detection limit is studied and subsequently optimized by oxygen and cesium flooding. Detection limits down to 10{sup -6} and 10{sup -5} can be obtained for silicon using Ne{sup +} and He{sup +}, respectively. A simulation based study reveals furthermore that a lateral resolution <10 nm can be obtained.

Wirtz, T.; Vanhove, N.; Pillatsch, L.; Dowsett, D. [Department of Science and Analysis of Materials (SAM), Centre de Recherche Public - Gabriel Lippmann, 41 rue du Brill, L-4422 Belvaux (Luxembourg); Sijbrandij, S.; Notte, J. [Carl Zeiss NTS LLC, One Corporation Way, Peabody, Massachusetts 01960 (United States)

2012-07-23T23:59:59.000Z

473

Current Experiments in Particle Physics (September 1996)  

SciTech Connect (OSTI)

This report contains summaries of current and recent experiments in Particle Physics. Included are experiments at BEPC (Beijing), BNL, CEBAF, CERN, CESR, DESY, FNAL, Frascati, ITEP (Moscow), JINR (Dubna), KEK, LAMPF, Novosibirsk, PNPI (St. Petersburg), PSI, Saclay, Serpukhov, SLAC, and TRIUMF, and also several proton decay and solar neutrino experiments. Excluded are experiments that finished taking data before 1991. Instructions are given for the World Wide Web (WWW) searching of the computer database (maintained under the SLAC-SPIRES system) that contains the summaries. This report contains full summaries of 180 approved current and recent experiments in elementary particle physics. The focus of the report is on selected experiments which directly contribute to our better understanding of elementary particles and their properties such as masses, widths or lifetimes, and branching fractions.

Galic, H.; Lehar, F.; Klyukhin, V.I.; Ryabov, Yu.G.; Bilak, S.V.; Illarionova, N.S.; Khachaturov, B.A.; Strokovsky, E.A.; Hoffman, C.M.; Kettle, P.-R.; Olin, A.; Armstrong, F.E.

1996-09-01T23:59:59.000Z

474

Initial conditions of radiative shock experiments  

SciTech Connect (OSTI)

We performed experiments at the Omega Laser Facility to characterize the initial, laser-driven state of a radiative shock experiment. These experiments aimed to measure the shock breakout time from a thin, laser-irradiated Be disk. The data are then used to inform a range of valid model parameters, such as electron flux limiter and polytropic ?, used when simulating radiative shock experiments using radiation hydrodynamics codes. The characterization experiment and the radiative shock experiment use a laser irradiance of ?7 × 10{sup 14} W cm{sup ?2} to launch a shock in the Be disk. A velocity interferometer and a streaked optical pyrometer were used to infer the amount of time for the shock to move through the Be disk. The experimental results were compared with simulation results from the Hyades code, which can be used to model the initial conditions of a radiative shock system using the CRASH code.

Kuranz, C. C.; Drake, R. P.; Krauland, C. M.; Marion, D. C.; Grosskopf, M. J.; Rutter, E.; Torralva, B.; Holloway, J. P. [Department of Atmospheric, Oceanic and Space Science, University of Michigan, Center for Radiative Shock Hydrodynamics, 2455 Hayward Dr., Ann Arbor, Michigan 48109 (United States)] [Department of Atmospheric, Oceanic and Space Science, University of Michigan, Center for Radiative Shock Hydrodynamics, 2455 Hayward Dr., Ann Arbor, Michigan 48109 (United States); Bingham, D.; Goh, J. [Department of Statistics and Actuarial Science, Simon Fraser University, Burnaby, BC, Canada V5A 1S6 (Canada)] [Department of Statistics and Actuarial Science, Simon Fraser University, Burnaby, BC, Canada V5A 1S6 (Canada); Boehly, T. R.; Sorce, A. T. [Laboratory for Laser Energetics, University of Rochester, New York 14623 (United States)] [Laboratory for Laser Energetics, University of Rochester, New York 14623 (United States)

2013-05-15T23:59:59.000Z

475

Information Gains from Cosmic Microwave Background Experiments  

E-Print Network [OSTI]

To shed light on the fundamental problems posed by Dark Energy and Dark Matter, a large number of experiments have been performed and combined to constrain cosmological models. We propose a novel way of quantifying the information gained by updates on the parameter constraints from a series of experiments which can either complement earlier measurements or replace them. For this purpose, we use the Kullback-Leibler divergence or relative entropy from information theory to measure differences in the posterior distributions in model parameter space from a pair of experiments. We apply this formalism to a historical series of Cosmic Microwave Background experiments ranging from Boomerang to WMAP, SPT, and Planck. Considering different combinations of these experiments, we thus estimate the information gain in units of bits and distinguish contributions from the reduction of statistical errors and the `surprise' corresponding to a significant shift of the parameters' central values. For this experiment series, we...

Seehars, Sebastian; Refregier, Alexandre; Paranjape, Aseem; Akeret, Joël

2014-01-01T23:59:59.000Z

476

Laboratory experiments with silicon solar cells  

Science Journals Connector (OSTI)

The uses of silicon solar cells as subjects of experiments in undergraduate teaching laboratories are discussed. The basic theory of these cells is presented including equivalent circuits and characteristic equations. Fundamental experiments on the power output and efficiency which are appropriate for non?science majors’ courses are detailed as well as more advanced experiments on cell parameters. Experimental results and agreement with theory are presented for a typical inexpensive cell.

D. W. Kammer; M. A. Ludington

1977-01-01T23:59:59.000Z

477

Magnet operating experience review for fusion applications  

SciTech Connect (OSTI)

This report presents a review of magnet operating experiences for normal-conducting and superconducting magnets from fusion, particle accelerator, medical technology, and magnetohydrodynamics research areas. Safety relevant magnet operating experiences are presented to provide feedback on field performance of existing designs and to point out the operational safety concerns. Quantitative estimates of magnet component failure rates and accident event frequencies are also presented, based on field experience and on performance of similar components in other industries.

Cadwallader, L.C.

1991-11-01T23:59:59.000Z

478

Oak Ridge Critical Experiment Facility (Building 9213)  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

9213) Joe Lenhard, retired Department of Energy official, had responsibility for the Oak Ridge Critical Experi- ment Facility. Joe has continued to hold up this facility as...

479

Oneida's utopia: a religious and scientific experiment.  

E-Print Network [OSTI]

??Abstract of ONEIDA?S UTOPIA: A RELIGIOUS AND SCIENTIFIC EXPERIMENT by Katherine Anne Heim The Oneida Community was a Perfectionist communal venture undertaken in Madison County,… (more)

Heim, Katherine Anne

2010-01-01T23:59:59.000Z

480

Current experiments in elementary particle physics  

SciTech Connect (OSTI)

This report contains summaries of 720 recent and current experiments in elementary particle physics (experiments that finished taking data before 1980 are excluded). Included are experiments at Brookhaven, CERN, CESR, DESY, Fermilab, Moscow Institute of Theoretical and Experimental Physics, Tokyo Institute of Nuclear Studies, KEK, LAMPF, Leningrad Nuclear Physics Institute, Saclay, Serpukhov, SIN, SLAC, and TRIUMF, and also experiments on proton decay. Instructions are given for searching online the computer database (maintained under the SLAC/SPIRES system) that contains the summaries. Properties of the fixed-target beams at most of the laboratories are summarized.

Wohl, C.G.; Armstrong, F.E., Oyanagi, Y.; Dodder, D.C.; Ryabov, Yu.G.; Frosch, R.; Olin, A.; Lehar, F.; Moskalev, A.N.; Barkov, B.P.

1987-03-01T23:59:59.000Z

Note: This page contains sample records for the topic "microscopic double-slit experiment" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


481

Current experiments in elementary particle physics  

SciTech Connect (OSTI)

This report contains summaries of 736 current and recent experiments in elementary particle physics (experiments that finished taking data before 1982 are excluded). Included are experiments at Brookhaven, CERN, CESR, DESY, Fermilab, Tokyo Institute of Nuclear Studies, Moscow Institute of Theoretical and Experimental Physics, Joint Institute for Nuclear Research (Dubna), KEK, LAMPF, Novosibirsk, PSI/SIN, Saclay, Serpukhov, SLAC, and TRIUMF, and also several underground experiments. Also given are instructions for searching online the computer database (maintained under the SLAC/SPIRES system) that contains the summaries. Properties of the fixed-target beams at most of the laboratories are summarized.

Wohl, C.G.; Armstrong, F.E.; Trippe, T.G.; Yost, G.P. (Lawrence Berkeley Lab., CA (USA)); Oyanagi, Y. (Tsukuba Univ., Ibaraki (Japan)); Dodder, D.C. (Los Alamos National Lab., NM (USA)); Ryabov, Yu.G.; Slabospitsky, S.R. (Gosudarstvennyj Komitet po Ispol'zovaniyu Atomnoj Ehnergii SSSR, Serpukhov (USSR). Inst. Fiziki Vysokikh Ehnergij); Frosch, R. (Swiss Inst. for Nuclear Research, Villigen (Switzerla

1989-09-01T23:59:59.000Z

482

Current experiments in elementary particle physics. Revised  

SciTech Connect (OSTI)

This report contains summaries of 584 current and recent experiments in elementary particle physics. Experiments that finished taking data before 1986 are excluded. Included are experiments at Brookhaven, CERN, CESR, DESY, Fermilab, Tokyo Institute of Nuclear Studies, Moscow Institute of Theoretical and Experimental Physics, KEK, LAMPF, Novosibirsk, Paul Scherrer Institut (PSI), Saclay, Serpukhov, SLAC, SSCL, and TRIUMF, and also several underground and underwater experiments. Instructions are given for remote searching of the computer database (maintained under the SLAC/SPIRES system) that contains the summaries.

Galic, H. [Stanford Univ., CA (United States). Stanford Linear Accelerator Center; Wohl, C.G.; Armstrong, B. [Lawrence Berkeley Lab., CA (United States); Dodder, D.C. [Los Alamos National Lab., NM (United States); Klyukhin, V.I.; Ryabov, Yu.G. [Inst. for High Energy Physics, Serpukhov (Russian Federation); Illarionova, N.S. [Inst. of Theoretical and Experimental Physics, Moscow (Russian Federation); Lehar, F. [CEN Saclay, Gif-sur-Yvette (France); Oyanagi, Y. [Univ. of Tokyo (Japan). Faculty of Sciences; Olin, A. [TRIUMF, Vancouver, BC (Canada); Frosch, R. [Paul Scherrer Inst., Villigen (Switzerland)

1992-06-01T23:59:59.000Z

483

Peer Reviewed: Experimenting with Hydroelectric Reservoirs  

Science Journals Connector (OSTI)

Peer Reviewed: Experimenting with Hydroelectric Reservoirs ... Researchers created reservoirs in Canada to explore the impacts of hydroelectric developments on greenhouse gas and methylmercury production. ...

R. A. Bodaly; Kenneth G. Beaty; Len H. Hendzel; Andrew R. Majewski; Michael J. Paterson; Kristofer R. Rolfhus; Alan F. Penn; Vincent L. St. Louis; Britt D. Hall; Cory J. D. Matthews; Katharine A. Cherewyk; Mariah Mailman; James P. Hurley; Sherry L. Schiff; Jason J. Venkiteswaran

2004-09-15T23:59:59.000Z

484

Early Childhood Experiences Conference on October 30  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Early Childhood Experiences Conference Community Connections: Your link to news and opportunities from Los Alamos National Laboratory Latest Issue: Dec. 2014 - Jan. 2015 All Issues...

485

Operating Experience Summary, 2013-03  

Broader source: Energy.gov (indexed) [DOE]

Investigation: Contamination at Los Alamos Neutron Science Center Due to Deficiencies in Conduct of Operations ...5 Page 1 Page 5 Page 1 of 12 Operating Experience Summary...

486

Operating Experience Summaries | Department of Energy  

Broader source: Energy.gov (indexed) [DOE]

Contamination at Los Alamos Neutron Science Center Due to Deficiencies in Conduct of Operations - Page 5 August 14, 2013 Operating Experience Summary - 2013-02 - August 14,...

487

Review of double beta decay experiments  

E-Print Network [OSTI]

The brief review of current experiments on search and studying of double beta decay processes is done. Best present limits on $\\langle m_{\

A. S. Barabash

2014-03-12T23:59:59.000Z

488

Playing games with EPR-type experiments  

E-Print Network [OSTI]

An approach towards quantum games is proposed that uses the unusual probabilities involved in EPR-type experiments directly in two-player games.

Azhar Iqbal

2005-07-17T23:59:59.000Z

489

Review of double beta decay experiments  

E-Print Network [OSTI]

The brief review of current experiments on search and studying of double beta decay processes is done. Best present limits on $\\langle m_{\

Barabash, A S

2014-01-01T23:59:59.000Z

490

International Collaborations on Engineered Barrier Systems: Experiment...  

Energy Savers [EERE]

modeling of field experiments at the Mont Terri URL, Switzerland, and the Horonobe URL, Japan. Modeling of coupled THM processes in the EBS is part of the international...

491

INTERPRETATION OF A HYDRAULIC FRACTURING EXPERIMENT, MONTICELLO, SOUTH CAROLINA  

E-Print Network [OSTI]

Letters INTERPRETATION OF A HYDRAULIC FRACTURING EXPERIMENT,12091 INTERPRETATION OF A HYDRAULIC FRACTURING EXPERIMENT,transient data from a hydraulic fracturing experiment have

Narasimhan, T.N.

2014-01-01T23:59:59.000Z

492

MARITIME BIODIVERSITY A VIRTUE-RACK EXPERIMENT.  

E-Print Network [OSTI]

MARITIME BIODIVERSITY A VIRTUE-RACK EXPERIMENT. How Water Condition Affects Organisms in Saline to different aquatic environments, an experiment consisting of two VIRTUE-racks was carried out. The VIRTUE-racks were placed at two different aquatic environments. One rack was exposed to waves, placed at the inflow

Harding, Karin

493

Presenting Data from Experiments in Algorithmics  

E-Print Network [OSTI]

Presenting Data from Experiments in Algorithmics Peter Sanders 1? Max�Planck�Institut f�ur Informatik Saarbr�ucken, Germany sanders@mpi�sb.mpg.de Abstract. Algorithmic experiments yield large amounts tools such as gnuplot 1 . 1 Introduction A paper in experimental algorithmics will often start

Sanders, Peter

494

Status of the MINERnuA Experiment  

SciTech Connect (OSTI)

MINERnuA is a dedicated neutrino cross section experiment at Fermilab that will study the axial current through neutrino-nucleon interactions and measure a variety of cross sections in support of long baseline neutrino oscillation experiments. A dataset of neutrino events was taken with a portion of MINERnuA, called the Tracking Prototype, installed in the NuMI beamline.

Eberly, B. [Department of Physics, University of Pittsburgh, Pittsburgh, PA (United States)

2010-03-30T23:59:59.0