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1

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

2

FT-IR microscopical analysis with synchrotron radiation: The microscope optics and system performance  

SciTech Connect

When a Fourier transform infrared (FT-IR) microspectrometer was first interfaced with the National Synchrotron Light Source (NSLS) in September 1993, there was an instant realization that the performance at the diffraction limit had increased 40-100 times. The synchrotron source transformed the IR microspectrometer into a true IR microprobe, providing high-quality IR spectra for probe diameters at the diffraction limit. The combination of IR microspectroscopy and synchrotron radiation provides a powerful new tool for molecular spectroscopy. The ability to perform IR microspectroscopy with synchrotron radiation is still under development at Brookhaven National Laboratory, but several initial studies have been completed that demonstrate the broad-ranging applications of this technology and its potential for materials characterization.

Reffner, J.A.; Martoglio, P.A. [Spectra-Tech, Inc., Shelton, CT (United States); Williams, G.P. [Brookhaven National Lab., Upton, NY (United States)

1995-01-01T23:59:59.000Z

3

FTIR Microscope | EMSL  

NLE Websites -- All DOE Office Websites (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...

4

IR-2003-  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Relations Office Washington, D.C. Media Contact: 202.622.4000 Relations Office Washington, D.C. Media Contact: 202.622.4000 www.IRS.gov/newsroom Public Contact: 800.829.1040 $1 BILLION IN TAX CREDITS ALLOCATED TO CLEAN COAL PROJECTS IR-2006-184, Nov. 30, 2006 WASHINGTON - The Internal Revenue Service announced that it has allocated nearly $1 billion of tax credits to nine planned clean coal projects. The Energy Policy Act of 2005 authorized $1.65 billion in tax credits for clean coal projects. The Act allocated $800 million of credits to integrated gasification combined cycle (IGCC) projects, $500 million to non-IGCC advanced coal electricity generation projects and $350 million to gasification projects. The $800 million allocated to IGCC projects is required to be allocated in relatively equal amounts among bituminous coal,

5

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

6

RSE Table N2.1 and N2.2. Relative Standard Errors for Tables N2.1 and N2.2  

U.S. Energy Information Administration (EIA) Indexed Site

N2.1 and N2.2. Relative Standard Errors for Tables N2.1 and N2.2;" N2.1 and N2.2. Relative Standard Errors for Tables N2.1 and N2.2;" " Unit: Percents." " "," " "NAICS"," "," ","Residual","Distillate",,"LPG and",,"Coke"," " "Code(a)","Subsector and Industry","Total","Fuel Oil","Fuel Oil(b)","Natural Gas(c)","NGL(d)","Coal","and Breeze","Other(e)" ,,"Total United States" , 311,"Food",6,0,8,0,0,0,0,7 312,"Beverage and Tobacco Products",10,0,82,0,0,0,0,9 313,"Textile Mills",19,0,77,3,20,0,0,48 314,"Textile Product Mills",38,0,0,38,27,0,0,42

7

Characterization of BCl3/N-2 plasmas  

E-Print Network (OSTI)

Optical emission spectroscopy, quadrupole mass spectrometry, and electron density measurements were used to study the effect of the percentage of N-2 on the characteristics of BCl3/N-2 plasmas and their resulting etch ...

Sia, S. F.

2003-08-15T23:59:59.000Z

8

Transmission Electron Microscope and Scanning Electron Microscopes -  

NLE Websites -- All DOE Office Websites (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.

9

The ${\\mathcal N}=2$ superconformal bootstrap  

E-Print Network (OSTI)

In this work we initiate the conformal bootstrap program for ${\\mathcal N}=2$ superconformal field theories in four dimensions. We promote an abstract operator-algebraic viewpoint in order to unify the description of Lagrangian and non-Lagrangian theories, and formulate various conjectures concerning the landscape of theories. We analyze in detail the four-point functions of flavor symmetry current multiplets and of ${\\mathcal N}=2$ chiral operators. For both correlation functions we review the solution of the superconformal Ward identities and describe their superconformal block decompositions. This provides the foundation for an extensive numerical analysis discussed in the second half of the paper. We find a large number of constraints for operator dimensions, OPE coefficients, and central charges that must hold for any ${\\mathcal N}=2$ superconformal field theory.

Christopher Beem; Madalena Lemos; Pedro Liendo; Leonardo Rastelli; Balt C. van Rees

2014-12-23T23:59:59.000Z

10

N2Solar | Open Energy Information  

Open Energy Info (EERE)

N2Solar N2Solar Jump to: navigation, search Name N2Solar LLC Address 2855 E. Robidoux Rd. Place Sandy, Utah Zip 84093 Sector Solar Product HOE Solar performance optics for PV, CSP, Desal and UV water treatment Year founded 2003 Number of employees 1-10 Phone number 801 608 3180 Coordinates 40.601751°, -111.811322° Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[{"text":"","title":"","link":null,"lat":40.601751,"lon":-111.811322,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

11

Reading Comprehension - Microscopes  

NLE Websites -- All DOE Office Websites (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

12

Helium Ion Microscope | EMSL  

NLE Websites -- All DOE Office Websites (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...

13

IR-2003- | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

IR-2003- IR-2003- IR-2003- More Documents & Publications Fact Sheet: Clean Coal Technology Ushers In New Era in Energy Fact Sheet: Clean Coal Technology Ushers In New Era in Energy...

14

Duality in N=2 minimal model holography  

E-Print Network (OSTI)

Recently a duality between a family of \\mathcal{N}=2 supersymmetric higher spin theories on AdS3, and the 't Hooft like limit of a class of Kazama-Suzuki models (that are parametrised by N and k) was proposed. The higher spin theories can be described by a Chern-Simons theory based on the infinite-dimensional Lie algebra shs[\\mu], and under the duality, \\mu is to be identified with \\lambda=N/(N+k+1). Here we elucidate the structure of the (quantum) asymptotic symmetry algebra sW_{\\infty}[\\mu] for arbitrary \\mu and central charge c. In particular, we show that for each value of the central charge, there are generically four different values of \\mu that describe the same sW_{\\infty} algebra. Among other things this proves that the quantum symmetries on both sides of the duality agree; this equivalence does not just hold in the 't Hooft limit, but even at finite N and k.

Candu, Constantin

2012-01-01T23:59:59.000Z

15

Duality in N=2 minimal model holography  

E-Print Network (OSTI)

Recently a duality between a family of \\mathcal{N}=2 supersymmetric higher spin theories on AdS3, and the 't Hooft like limit of a class of Kazama-Suzuki models (that are parametrised by N and k) was proposed. The higher spin theories can be described by a Chern-Simons theory based on the infinite-dimensional Lie algebra shs[\\mu], and under the duality, \\mu is to be identified with \\lambda=N/(N+k+1). Here we elucidate the structure of the (quantum) asymptotic symmetry algebra sW_{\\infty}[\\mu] for arbitrary \\mu and central charge c. In particular, we show that for each value of the central charge, there are generically four different values of \\mu that describe the same sW_{\\infty} algebra. Among other things this proves that the quantum symmetries on both sides of the duality agree; this equivalence does not just hold in the 't Hooft limit, but even at finite N and k.

Constantin Candu; Matthias R. Gaberdiel

2012-07-27T23:59:59.000Z

16

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

17

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

18

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

19

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

20

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

Note: This page contains sample records for the topic "ir microscope n2" 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

Seasonal variations in N2O emissions from central California  

NLE Websites -- All DOE Office Websites (Extended Search)

Seasonal variations in N2O emissions from central California Seasonal variations in N2O emissions from central California Title Seasonal variations in N2O emissions from central California Publication Type Journal Article Year of Publication 2012 Authors Jeong, Seongeun, Chuanfeng Zhao, Arlyn E. Andrews, Edward J. Dlugokencky, Colm Sweeney, Laura Bianco, James M. Wilczak, and Marc L. Fischer Journal Geophysical Research Letters Volume 39 Issue 16 Keywords atmospheric transport, inverse modeling, nitrous oxide Abstract We estimate nitrous oxide (N2O) emissions from Central California for the period of December 2007 through November 2009 by comparing N2O mixing ratios measured at a tall tower (Walnut Grove, WGC) with transport model predictions based on two global a priori N2O emission models (EDGAR32 and EDGAR42). Atmospheric particle trajectories and surface footprints are computed using the Weather Research and Forecasting (WRF) and Stochastic Time-Inverted Lagrangian Transport (STILT) models. Regression analyses show that the slopes of predicted on measured N2O from both emission models are low, suggesting that actual N2O emissions are significantly higher than the EDGAR inventories for all seasons. Bayesian inverse analyses of regional N2O emissions show that posterior annual N2O emissions are larger than both EDGAR inventories by factors of 2.0 ± 0.4 (EDGAR32) and 2.1 ± 0.4 (EDGAR42) with seasonal variation ranging from 1.6 ± 0.3 to 2.5 ± 0.4 for an influence region of Central California within approximately 150 km of the tower. These results suggest that if the spatial distribution of N2O emissions in California follows the EDGAR emission models, then actual emissions are 2.7 ± 0.5 times greater than the current California emission inventory, and total N2O emissions account for 8.1 ± 1.4% of total greenhouse gas emissions from California.

22

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

23

TECHNICAL REPORTS Continuous measurement of soil N2  

E-Print Network (OSTI)

.5 nmol mol-1 , equal to that of a tunable diode laser N2 O analyzer. The solar/wind hybrid power system and automated chamber system, powered by wind and solar, that can continuously measure soil N2 O emissions performed well during summer, but system failures increased in frequency in spring and fall, usually

Minnesota, University of

24

Unexpected Nondissociative Binding of N2O on Oxygen Vacancies...  

NLE Websites -- All DOE Office Websites (Extended Search)

Nondissociative Binding of N2O on Oxygen Vacancies on a Rutile TiO2(110)-1×1 . Unexpected Nondissociative Binding of N2O on Oxygen Vacancies on a Rutile TiO2(110)-1×1 ....

25

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

26

I\r'  

Office of Legacy Management (LM)

r' r' ( g-.] ic' fz .; w .fl ! : L ' ..j : i ?- z -2"" . 2,-3X-~ Aw23-t 11, 1949 J c. s. ?.%omic ?zaru ccm3ission 7-t i-~n,~-;ra-& 3&-p.Cz' ;"ica P. ' 3. 30x 3 Eacsrs 17, lIaw York :. , ::; /. 1 httetii OP J xl-. P, 3. 2gp C+~t~Sil;lsXl t ?~~$Tly~lf .t: GA.3 L?wjpnaJiQn Of p-3&7:2-Liop 9.0";:7~+50 s' , -ir ,.,,3 iashlla+im it i3 our da3irs 20 be rslia-T.73 of _"\L:t&?T --:wzk&ili* of the SC1298 ' _ _ Zj31Wf end i~i3sio~~31.3 rsskeri31ii izxLi.c~~t& S' ;az&;-d -D~YX-C.I o-Ada - 451 g3ac SyT,kd jl-J$; 3.xi.da - 2% p3 I :&at a 1 a azqi?L;3 3 - ' T-44 pi3. 3 ,LS oxid-\ 3aqr1.93 aar9 ~z;cc?33a~jr la 5.x0 st?%zl*hl~iao- ::>a of In'se-3' -J*-y chs=iical r9tag;P,sta d.ili::d fn cm2 sxlgtit3sl -.- -n4A..*

27

NETL: IRS Tax Credit Program  

NLE Websites -- All DOE Office Websites (Extended Search)

Solicitations & Business Opportunities IRS Tax Credit Program The Department of Energy's National Energy Technology Laboratory (NETL) is collaborating with the Internal Revenue Service (IRS) to evaluate applications for Tax Credits under Section 1307 of the Energy Policy Act of 2005, and the Emergency Economic Stabilization Act of 2008, per instruction in the Treasury and IRS Announcement 2010-56, which can be found at: http://www.irs.gov/irb/2010-39_IRB/ar09.html or http://www.irs.gov/pub/irs-drop/a-10-56.pdf Specifically, NETL will be evaluating and providing certifications of feasibility for advanced coal and gasification projects consistent with energy policy goals (“DOE certification”). To facilitate the review process, NETL has established this website to receive and respond to questions from prospective applicants regarding the Notices. NETL will post responses to questions or groups of similar questions.

28

The O2/N2 Ratio Gas Solubility Mystery  

Science Journals Connector (OSTI)

Oxygen (O2) and nitrogen (N2) are the two most abundant gases in the Earth’s atmosphere and have generally similar physical properties, yet O2 is twice as soluble in water as N2, a feature that may have physiological and other biological consequences. ... In addition, a sensible explanation for the difference in the aqueous solubilities of O2 and N2 would provide some insight into the factors determining gas solubility in water. ... The soly. of 408 gaseous compds. in water at 298 K has been correlated through equation (i), where the soly. is expressed as the Ostwald soly. ...

Rubin Battino; Paul G. Seybold

2011-10-20T23:59:59.000Z

29

Fluorescence, Single-Molecule Microscope | EMSL  

NLE Websites -- All DOE Office Websites (Extended Search)

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

30

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

31

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

32

Atomic Force Microscope  

SciTech Connect

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

33

Chiral and real N=2 supersymmetric ?-conformal Galilei algebras  

SciTech Connect

Inequivalent N=2 supersymmetrizations of the ?-conformal Galilei algebra in d-spatial dimensions are constructed from the chiral (2, 2) and the real (1, 2, 1) basic supermultiplets of the N=2 supersymmetry. For non-negative integer and half-integer ?, both superalgebras admit a consistent truncation with a (different) finite number of generators. The real N=2 case coincides with the superalgebra introduced by Masterov, while the chiral N=2 case is a new superalgebra. We present D-module representations of both superalgebras. Then we investigate the new superalgebra derived from the chiral supermultiplet. It is shown that it admits two types of central extensions, one is found for any d and half-integer ?, and the other only for d= 2 and integer ?. For each central extension, the centrally extended ?-superconformal Galilei algebra is realized in terms of its super-Heisenberg subalgebra generators.

Aizawa, N. [Department of Mathematics and Information Sciences, Graduate School of Science, Osaka Prefecture University, Nakamozu Campus, Sakai, Osaka 599-8351 (Japan)] [Department of Mathematics and Information Sciences, Graduate School of Science, Osaka Prefecture University, Nakamozu Campus, Sakai, Osaka 599-8351 (Japan); Kuznetsova, Z. [UFABC, Rua Santa Adélia 166, Bangu, cep 09210-170, Santo André, SP (Brazil)] [UFABC, Rua Santa Adélia 166, Bangu, cep 09210-170, Santo André, SP (Brazil); Toppan, F. [CBPF, Rua Dr. Xavier Sigaud 150, Urca, cep 22290-180, Rio de Janeiro, RJ (Brazil)] [CBPF, Rua Dr. Xavier Sigaud 150, Urca, cep 22290-180, Rio de Janeiro, RJ (Brazil)

2013-09-15T23:59:59.000Z

34

N=2 Super Boussinesq Hierarchy: Lax Pairs and Conservation Laws  

E-Print Network (OSTI)

We study the integrability properties of the one-parameter family of $N=2$ super Boussinesq equations obtained earlier by two of us (E.I. \\& S.K., Phys. Lett. B 291 (1992) 63) as a hamiltonian flow on the $N=2$ super-$W_3$ algebra. We show that it admits nontrivial higher order conserved quantities and hence gives rise to integrable hierarchies only for three values of the involved parameter, $\\alpha=-2,\\;-1/2,\\;5/2$. We find that for the case $\\alpha = -1/2$ there exists a Lax pair formulation in terms of local $N=2$ pseudo-differential operators, while for $\\alpha = -2$ the associated equation turns out to be bi-hamiltonian.

S. Bellucci; E. Ivanov; S. Krivonos; A. Pichugin

1993-05-18T23:59:59.000Z

35

Characteristics of atmospheric-pressure non-thermal N2 and N2/O2 gas mixture plasma jet  

Science Journals Connector (OSTI)

An atmospheric-pressure non-thermal plasma jet driven by high frequency alternating current and operating on N2 and N2/O2 gas mixture is investigated. The plasma jet can reach 55?mm in length at a gas flow rate of 2500?l/h. The gas temperature at a distance of 4?mm from the nozzle is close to room temperature. Optical emission spectroscopy is employed to investigate the important plasma parameters such as the excited species rotational temperature vibrational temperature and excitation temperature under different discharge conditions. The results show that the plasma source operates under non-equilibrium conditions. The absolute irradiance intensity of the vibrational band N2(C-B) in the active region is measured. Taking into account the irradiance intensity of N2(C-B 0-0) and N2(B-X 0-0) as well as measured current the electron density which is determined by considering direct and step-wise electron impact excitation of nitrogen emission reaches a maximum value of 5.6?×?1020/m3.

Dezhi Xiao; Cheng Cheng; Jie Shen; Yan Lan; Hongbing Xie; Xingsheng Shu; Jiangang Li; Paul K. Chu

2014-01-01T23:59:59.000Z

36

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

37

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

38

Nonlocality from N>2 independent single-photon emitters  

SciTech Connect

We demonstrate that intensity correlations of second order in the fluorescence light of N>2 single-photon emitters may violate locality while the visibility of the signal remains below 1/{radical}(2){approx_equal}71%. For this, we derive a homogeneous Bell-Wigner-type inequality, which can be applied to a broad class of experimental setups. We trace the violation of this inequality back to path entanglement created by the process of detection.

Thiel, C.; Wiegner, R.; Zanthier, J. von [Institut fuer Optik, Information und Photonik, Universitaet Erlangen-Nuernberg, D-91058 Erlangen (Germany); Agarwal, G. S. [Department of Physics, Oklahoma State University, Stillwater, Oklahoma 74078-3072 (United States)

2010-09-15T23:59:59.000Z

39

Reading Comprehension - Dissecting and Compound Microscopes  

NLE Websites -- All DOE Office Websites (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

40

Science, Optics and You: Microscopes and Crystals  

NLE Websites -- All DOE Office Websites (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...

Note: This page contains sample records for the topic "ir microscope n2" 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

N=2 gauge theories and degenerate fields of Toda theory  

SciTech Connect

We discuss the correspondence between degenerate fields of the W{sub N} algebra and punctures of Gaiotto's description of the Seiberg-Witten curve of N=2 superconformal gauge theories. Namely, we find that the type of degenerate fields of the W{sub N} algebra, with null states at level one, is classified by Young diagrams with N boxes, and that the singular behavior of the Seiberg-Witten curve near the puncture agrees with that of W{sub N} generators. We also find how to translate mass parameters of the gauge theory to the momenta of the Toda theory.

Kanno, Shoichi; Matsuo, Yutaka; Shiba, Shotaro [Department of Physics, Faculty of Science, University of Tokyo, Hongo, Bunkyo-ku, Tokyo 113-0033 (Japan); Tachikawa, Yuji [School of Natural Sciences, Institute for Advanced Study, Princeton, New Jersey 08540 (United States)

2010-02-15T23:59:59.000Z

42

IR  

NLE Websites -- All DOE Office Websites (Extended Search)

on several major projects, including current inspection of welds for an oil and gas pipeline company from Italy, welding and inspection system for the National Spent Nuclear...

43

The History of the Microscope  

NLE Websites -- All DOE Office Websites (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.

44

Multi-instanton calculus in N=2 supersymmetric gauge theory  

Science Journals Connector (OSTI)

The Seiberg-Witten solution of N=2 supersymmetric SU(2) gauge theory may be viewed as a prediction for the infinite family of constants {Fn} measuring the n-instanton contribution to the prepotential F. Here we examine the instanton physics directly, in particular the contribution of the general self-dual solution of topological charge n constructed by Atiyah, Drinfeld, Hitchin, and Manin (ADHM). In both the bosonic and supersymmetric cases, we determine both the large- and short-distance behavior of all the fields in this background. This allows us to construct the exact classical interaction between n ADHM (super)instantons mediated by the adjoint Higgs bosons. We calculate the one- and two-instanton contributions to the low-energy Seiberg-Witten effective action and find precise agreement with their predicted values of F1 and F2.

Nicholas Dorey; Valentin V. Khoze; Michael P. Mattis

1996-08-15T23:59:59.000Z

45

Neutrino parameters and the $N_2$-dominated scenario of leptogenesis  

E-Print Network (OSTI)

We briefly review the main aspects of leptogenesis, describing both the unflavoured and the flavoured versions of the $N_2$-dominated scenario. A study of the success rates of both classes of models has been carried out. We comment on these results and discuss corrective effects to this simplest scenario. Focusing on the flavoured case, we consider the conditions required by strong thermal leptogenesis, where the final asymmetry is fully independent of the initial conditions. Barring strong cancellations in the seesaw formula and in the flavoured decay parameters, we show that strong thermal leptogenesis favours a lightest neutrino mass $m_1\\gtrsim10\\,\\mbox{meV}$ for normal ordering (NO) and $m_1\\gtrsim 3\\,\\mbox{meV}$ for inverted ordering (IO). Finally, we briefly comment on the power of absolute neutrino mass scale experiments to either support or severely corner strong thermal leptogenesis.

Michele Re Fiorentin; Sophie E. King

2014-05-09T23:59:59.000Z

46

Carbon nanotube IR detectors (SV)  

SciTech Connect

Sandia National Laboratories (Sandia) and Lockheed Martin Corporation (LMC) collaborated to (1) evaluate the potential of carbon nanotubes as channels in infrared (IR) photodetectors; (2) assemble and characterize carbon nanotube electronic devices and measure the photocurrent generated when exposed to infrared light;(3) compare the performance of the carbon nanotube devices with that of traditional devices; and (4) develop and numerically implement models of electronic transport and opto-electronic behavior of carbon nanotube infrared detectors. This work established a new paradigm for photodetectors.

Leonard, F. L.

2012-03-01T23:59:59.000Z

47

Offsetting the radiative benefit of ocean iron fertilization by enhancing N2O emissions  

E-Print Network (OSTI)

from the atmospheric CO2 reduction significantly, because N2O is a much more powerful greenhouse gas

Gruber, Nicolas

48

Global distribution of N2O emissions from aquatic systems: natural emissions and anthropogenic eects  

E-Print Network (OSTI)

Global distribution of N2O emissions from aquatic systems: natural emissions and anthropogenic, are increasing due to human activities. Our analysis suggests that a third of global anthropogenic N2O emission the remainder. Over 80% of aquatic anthropogenic N2O emissions are from the Northern Hemisphere mid

Seitzinger, Sybil

49

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

50

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

51

Magnetically polarized Ir dopant atoms in superconducting Ba(Fe1?xIrx)2As2  

SciTech Connect

We investigate the magnetic polarization of the Ir 5d dopant states in the pnictide superconductor Ba(Fe1?xIrx)2As2 with x=0.027(2) using Ir L3 edge x-ray resonant magnetic scattering (XRMS). Despite the fact that doping partially suppresses the antiferromagnetic transition, we find that magnetic order survives around the Ir dopant sites. The Ir states are magnetically polarized with commensurate stripe-like antiferromagnetic order and long correlations lengths, ?mag>2800 and >850 Ĺ, in the ab plane and along the c axis, respectively, driven by their interaction with the Fe spins. This Ir magnetic order persists up to the Néel transition of the majority Fe spins at TN=74(2) K. At 5 K we find that magnetic order coexists microscopically with superconductivity in Ba(Fe1?xIrx)2As2. The energy dependence of the XRMS through the Ir L3 edge shows a non-Lorentzian line shape, which we explain in terms of interference between Ir resonant scattering and Fe nonresonant magnetic scattering.

Dean, M.P.M.; Kim, M.G.; Kreyssig, A.; Kim, J.W.; Liu, X.; Ryan, P.J.; Thaler, A.; Budko, S.L.; Strassheim, W.; Canfield, P.C.; Hill, J.P.; Goldman, A.I.

2012-04-25T23:59:59.000Z

52

Synthesis and Optical Properties of NuTaN2: Potential Solar Cell Applications  

SciTech Connect

Layered CuTaN2 was synthesized by an ion exchange reaction of CuI and NaTaN2 as previously reported. Based on the results of EDX analysis, the Cu:Ta ratio of the CuTaN2 sample was 1:1 within the overall errors when examining powders of +/-10% and no Na was detected. The crystal structure and thermal stability of CuTaN2 was accurately determined by Rietveld analysis of the powder X-ray Diffraction profile and by TGA analysis, respectively. CuTaN2 crystallizes in a rhombohedral structure with space group R-3mH as shown in [figure 1]. CuTaN2 possesses a band gap of 1.53(x) eV, which is in reasonable agreement with density functional theory calculations of Cu containing nitrides. Similar materials may be even better suited for solar cell application.

Yang, M.; Zakutayev, A.; Zhang, X.; Ginley, D.; DiSalvo, F.

2013-01-01T23:59:59.000Z

53

The development of N2S2 metal complexes as bidentate ligands for organometallic chemistry  

E-Print Network (OSTI)

from CO addition to (NiN2S2)W(CO)4, which is in equilibrium with the resulting (NiN2S2)W(CO)5 species (Keq = 2.8 M-1, G = -1.4 kJ/mole at 50C). Complete NiN2S2 ligand displacement by CO-cleavage of the remaining W-S bond to form W(CO)6 was not observed...

Rampersad, Marilyn Vena

2007-04-25T23:59:59.000Z

54

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

55

Unique Thylakoid Membrane Architecture of aUnicellular N2-Fixing...  

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intracellular transport and trafficking. Citation: Liberton ML, JR Austin, RH Berg, and HB Pakrasi.2011."Unique Thylakoid Membrane Architecture of aUnicellular N2-Fixing...

56

Generalised CP and $\\Delta (6n^2)$ Family Symmetry in Semi-Direct Models of Leptons  

E-Print Network (OSTI)

We perform a detailed analysis of $\\Delta (6n^2)$ family symmetry combined with a generalised CP symmetry in the lepton sector, breaking to different remnant symmetries $G_{\

Ding, Gui-Jun; Neder, Thomas

2014-01-01T23:59:59.000Z

57

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

58

Disorder-Induced Microscopic Magnetic Memory  

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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.

59

Uncertainties Associated with Theoretically Calculated N2-Broadened Half-Widths of H2O Lines  

E-Print Network (OSTI)

to be calculated theoretically. The accuracy of these calculated values depends on many factors such as the line-shape1 Uncertainties Associated with Theoretically Calculated N2- Broadened Half-Widths of H2O Lines Q-offs used in the theoretical calculations, we have carried out extensive numerical calculations of the N2

Gamache, Robert R.

60

Raman excitation profiles for the (n1, n2) assignment in carbon nanotubes  

E-Print Network (OSTI)

Raman excitation profiles for the (n1, n2) assignment in carbon nanotubes H. Telg , J. Maultzsch indices n1 and n2 in semiconducting and metallic nanotubes was performed comparing resonance Raman nanotube families. Ever since the discovery of how to keep isolated nanotubes from rebundeling in solu

Nabben, Reinhard

Note: This page contains sample records for the topic "ir microscope n2" 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

Impact of N2 dilution on combustion and emissions in a spark ignition CNG engine  

Science Journals Connector (OSTI)

Abstract In order to reduce \\{NOx\\} (nitrogen oxides) emissions, N2 (nitrogen) was introduced as dilution gas to dilute mixture with a specially-designed injection device. The impacts of varying N2 DR (dilution ratio) on the combustion and the exhaust emissions were investigated, including engine heat release rate, indicator diagram, NOx, CO (carbon monoxide), THC (total hydrocarbon) emissions and so on. For this study, a modified 6.6 L CNG (compressed natural gas) engine was tested and N2 was injected into the end of intake manifold by a specially-designed device. The results showed that N2 dilution has a significant influence on the combustion and the exhaust emissions. With the rise of N2 DR, the maximum of pressure in cylinder and the maximum of heat release rate exhibited decrease trends, the centre of heat release curve showed a moving backward tendency. Higher N2 DR exhibited lower \\{NOx\\} (17–81%) emissions, but higher emissions of THC (3–78%) and CO (1–28%). The change of BSFC (brake specific fuel consumption) can be ignored with N2 DR no more than 167%. Satisfactory results can be obtained, with lower \\{NOx\\} (31%) emissions, lower BSFC (0.5%), and relatively higher THC (6%) and CO (1%) emissions, when N2 DR is 67%.

Zhongshu Wang; Hongbin Zuo; Zhongchang Liu; Weifeng Li; Huili Dou

2014-01-01T23:59:59.000Z

62

A New High-Resolution N2O Emission Inventory for China in 2008  

Science Journals Connector (OSTI)

Per-capita and per-GDP N2O emissions increase gradually with an increase in the urban population fraction from 0.3 to 0.9 among 2884 counties, and N2O emission density increases with urban expansion. ... (56-58) This decrease of demand would eventually reduce some of the food and energy supplies in these regions. ...

Feng Zhou; Ziyin Shang; Philippe Ciais; Shu Tao; Shilong Piao; Peter Raymond; Canfei He; Bengang Li; Rong Wang; Xuhui Wang; Shushi Peng; Zhenzhong Zeng; Han Chen; Na Ying; Xikang Hou; Peng Xu

2014-06-25T23:59:59.000Z

63

The substitution reaction of (CNC)Fe?2N2 with CO  

Science Journals Connector (OSTI)

In the first SN2 substitution step, C1-O1 molecule replaces the axial N3-N4 of (CNC)Fe(N2)_N2, by attacking Fe center from the opposite direction of N3-N4. In the transition state of SN2TS1, the Fe-N3 bond has be...

Hongyan Liu; Shuangshuang Liu; Xiang Zhang

2013-06-01T23:59:59.000Z

64

15N2 formation and fast oxygen isotope exchange during pulsed...  

NLE Websites -- All DOE Office Websites (Extended Search)

N2 formation and fast oxygen isotope exchange during pulsed 15N18O exposure of MnOxCeO2. 15N2 formation and fast oxygen isotope exchange during pulsed 15N18O exposure of MnOx...

65

IRS Announces New Tribal Economic Development Bond Allocation...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

IRS Announces New Tribal Economic Development Bond Allocation Guidance IRS Announces New Tribal Economic Development Bond Allocation Guidance July 18, 2012 - 3:46pm Addthis To...

66

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

SciTech Connect

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

67

Disorder-Induced Microscopic Magnetic Memory  

NLE Websites -- All DOE Office Websites (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.

68

Disorder-Induced Microscopic Magnetic Memory  

NLE Websites -- All DOE Office Websites (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.

69

Variable Temperature Scanning Probe Microscope | EMSL  

NLE Websites -- All DOE Office Websites (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

Soft x-ray laser microscope  

SciTech Connect

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

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

Fiber Delivery of mid-IR lasers  

SciTech Connect

Fiber optics for the visible to near infrared (NIR) wavelength regimes (i.e. = 0.42 {mu}m) have proven to be extremely useful for a myriad of applications such as telecommunications, illumination, and sensors because they enable convenient, compact, and remote delivery of laser beams. Similarly, there is a need for fiber optics operating at longer wavelengths. For example, systems operating in the mid-IR regime (i.e., = 314 {mu}m) are being developed to detect trace molecular species with far-reaching applications, such as detecting explosives on surfaces, pollutants in the environment, and biomarkers in the breath of a patient. Furthermore, with the increasing availability of quantum cascade lasers (QCLs) which are semiconductor lasers that operate in the mid-IR regime additional uses are rapidly being developed. Here, we describe the development of hollow-core fibers for delivery of high-quality mid-IR laser beams across a broad spectral range.

Kriesel, J.M.; Gat, N.; Bernacki, Bruce E.; Myers, Tanya L.; Bledt, Carlos M.; Harrington, James P.

2011-08-24T23:59:59.000Z

73

Multi-Instanton Measure from Recursion Relations in N = 2 Supersymmetric Yang-Mills Theory  

Science Journals Connector (OSTI)

By using the recursion relations found in the framework of N = 2 Super Yang-Mills theory with gauge group SU(2), we reconstruct the structure of the instanton moduli space and its volume form for all winding numbers.

Marco Matone

2001-01-01T23:59:59.000Z

74

Electronic structure calculations of small Al n (n=2–8) clusters  

Science Journals Connector (OSTI)

The electronic states of small Al n (n...=2–8) clusters have been calculated with a relativistic ab-initio MO-LCAO Dirac-Fock-Slater method using numerical atomic DFS wave-funct...

T. Bastug; W. D. Sepp; B. Fricke…

1992-01-01T23:59:59.000Z

75

External Electric Field Catalyzed N2O Decomposition on Mn-Embedded Graphene  

Science Journals Connector (OSTI)

External Electric Field Catalyzed N2O Decomposition on Mn-Embedded Graphene ... Key Laboratory of Automobile Materials, Ministry of Education, and Department of Materials Science and Engineering, Jilin University, Changchun 130022, China ...

E. H. Song; J. M. Yan; J. S. Lian; Q. Jiang

2012-09-05T23:59:59.000Z

76

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

NLE Websites -- All DOE Office Websites (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...

77

Single-Molecule Flourescence/Patch Clamp Microscope | EMSL  

NLE Websites -- All DOE Office Websites (Extended Search)

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

78

Phase separation, density fluctuation, and critical dynamics of N2 in aerogel  

Science Journals Connector (OSTI)

Light scattering was used to study N2 confined in aerogel. We find evidence of liquid-vapor phase separation that terminates at a critical point. Whereas the width of the coexistence curves is substantialy reduced relative to bulk N2, the shape of the coexistence curve is similar to that found for the bulk. Photon correlation spectroscopy shows that the density fluctuations decay algebraically in time, a result consistent with the random-field Ising model.

A. P. Y. Wong; S. B. Kim; W. I. Goldburg; M. H. W. Chan

1993-02-15T23:59:59.000Z

79

3, 20272058, 2003 Trace gas IR  

E-Print Network (OSTI)

and on the climate forcing: H2O, CO2, N2O, CH4, CFCs, O3, and CO. The atmospheric abundances obtained from infrared satellite for chemistry and climate applications C. Clerbaux 1 , J. Hadji-Lazaro 1 , S. Turquety 1 gas abundances in the troposphere were obtained from10 sparsely distributed measurement sites

80

IR-4 Ornamental Horticulture Program Trial Report  

E-Print Network (OSTI)

IR-4 Ornamental Horticulture Program Trial Report Researcher(s): Heiner Lieth, UC Davis PRNumber. The phytotoxicity index values generally averaged less than 2, suggesting very light damage which is probably-4 Ornamental Horticulture Program Trial Report Researcher(s): Heiner Lieth, UC Davis PRNumber

Lieth, J. Heinrich

Note: This page contains sample records for the topic "ir microscope n2" 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

Cosmic IR Backgrounds Ned Wright (UCLA)  

E-Print Network (OSTI)

Cosmic IR Backgrounds by Ned Wright (UCLA) http://www.astro.ucla.edu/~wright/intro.html See: · http://www.astro.ucla.edu/~wright/cosmolog.htm · http://www.astro.ucla.edu/~wright/DIRBE · http://www.astro.ucla.edu/~wright/CIBR · http

Wright, Edward L. "Ned"

82

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

83

Relative importance of organic coatings for the heterogeneous hydrolysis of N2O5 during summer in Europe  

E-Print Network (OSTI)

coatings, formed via gas-to- particle conversion on aqueous aerosols, to N2O5 hydrolysis on localRelative importance of organic coatings for the heterogeneous hydrolysis of N2O5 during summer suppress heterogeneous N2O5 hydrolysis. In this study we investigated the relative importance of organic

Riemer, Nicole

84

Instrument Series: Microscopy Environmental Transmission Electron Microscope  

NLE Websites -- All DOE Office Websites (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

85

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

86

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

87

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

88

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

89

Modern Records of Atmospheric Nitrous Oxide (N2O) and a 2000-year Ice-core  

NLE Websites -- All DOE Office Websites (Extended Search)

Modern Records of Atmospheric Nitrous Oxide (N2O) and a 2000-year Ice-core Modern Records of Atmospheric Nitrous Oxide (N2O) and a 2000-year Ice-core Record from Law Dome, Antarctica Introduction This page provides an introduction and links to records of atmospheric nitrous oxide (N2O) over the last 2000 years, emphasizing large data bases each representing currently active stations. Records in recent decades (time period depending on location) have been obtained from samples of ambient-air at remote locations, which represent changing global atmospheric conditions rather than influences of local sources. The longer (2000-year) record is from the Law Dome ice core in Antarctica. The ice-core record has been merged with modern annual data from Cape Grim, Tasmania to provide a 2000-year time series of annual values. A spline function has been fit to the data to provide a continuous time series of

90

Gauge/Gravity Duality, Green Functions of N=2 SYM and Radial/Energy-Scale Relation  

E-Print Network (OSTI)

We consider supergravity configuration of D5 branes wrapped on supersymmetric 2-cycles and use it to calculate one-point and two-point Green functions of some special operators in N=2 super Yang-Mills theory. We show that Green functions obtained from supergravity include two very different parts. One of them corresponds to perturbative results of quantum field theory, and another is a non-perturbative effect which corresponds to contribution from instantons with fractional charge. Comparing Green functions obtained from supergravity and gauge theory, we obtain radial/energy-scale relation for this gauge/gravity correspondence with N=2 supersymmetry. This relation leads right beta-function of N=2 SYM from supergravity configuration.

Xiao-Jun Wang; Seng Hu

2002-07-16T23:59:59.000Z

91

Experimental and theoretical study of the (n,2n) reaction on 174,176Hf isotopes  

Science Journals Connector (OSTI)

Cross sections for the 174Hf(n,2n)173Hf and 176Hf(n,2n)175Hf reactions have been measured on the 5.5-MV Van de Graaff tandem accelerator of National Centre for Scientific Research “Demokritos” in Athens, in the neutron energy region from 8.8 to 11.0 MeV, using the activation technique. An experimental method to account for the contamination of the 176Hf(n,2n) reaction by the 174Hf(n,?) reaction activated by the parasitic neutrons of the beam is presented. Statistical model calculations have also been performed using the nuclear-reaction codes empire-ii and talys. The results and effects of the nuclear input parameters as well as pre-equilibrium emission are discussed in detail.

M. Serris; M. Diakaki; S. Galanopoulos; M. Kokkoris; M. Lamprou; C. T. Papadopoulos; R. Vlastou; P. Demetriou; C. A. Kalfas; A. Lagoyannis

2012-09-07T23:59:59.000Z

92

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

93

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

94

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

95

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

96

Mobile Robotics I: Lab 3 Obstacle Avoidance with IR Sensors  

E-Print Network (OSTI)

Sensors Background IR SENSORS INTERFACE The CEENBoT comes equipped with a Left and Right non-contact bumpMobile Robotics I: Lab 3 Obstacle Avoidance with IR Sensors CEENBoTTM Mobile Robotics Platform 1.01 #12;. ( Blank ) #12;Mobile Robotics I ­ Obstacle Avoidance with IR Sensors Purpose

Farritor, Shane

97

Extreme Galactic-Winds and Starburst in IR Mergers and IR QSOs  

E-Print Network (OSTI)

We report -as a part of a long-term study of mergers and IR QSOs- detailed spectroscopic evidences for outflow (OF) and/or Wolf Rayet features in: (i) low velocity OF in the ongoing mergers NGC 4038/39 and IRAS 23128-5919; (ii) extreme velocity OF (EVOF) in the QSOs IRAS 01003-2238 and IRAS 13218+0552; (iii) OF and EVOF in a complete sample of ultra-luminous IR galaxies/QSOs ("The IRAS 1 Jy MKO-KPNO Survey", of 118 objects). We found EVOF in IRAS 11119+3257, 14394+5332, 15130+1958 and 15462-0450. The OF components detected in these objects were mainly associated to starburst processes: i.e., to galactic-winds generated in multiple type II SN explosions and massive stars. The EVOF were detected in objects with strong starburst plus obscured IR QSOs; which suggest that interaction of both processes could generate EVOF. In addition, we analyze the presence of Wolf Rayet features in the large sample of Bright PG-QSOs (Boroson and Green 1992), and nearby mergers and galactic-wind galaxies. We found clear WR features in the Fe II QSOs (type I): PG 1244+026, 1444+407, 1448+273, 1535+547; and in the IR merger Arp 220. HST archive images of IR+BAL QSOs show in practically all of these objects "arc or shell" features probably associated to galactic-winds (i.e., to multiple type II SN explosions) and/or merger processes. Finally, we discuss the presence of extreme starburst and galactic wind as a possible evolutive link between IR merger and IR QSOs; where the relation between mergers and extreme starburst (with powerful galactic-winds) plays in important role, in the evolution of galaxies.

S. Lipari; D. Sanders; R. Terlevich; S. Veilleux; R. Diaz; Y. Taniguchi; W. Zheng; D. Kim; Z. Tsvetanov; G. Carranza; H. Dottori

2000-07-20T23:59:59.000Z

98

Superconductivity in Ban+2Ir4nGe12n+4 (n=1,2) with cage structure and softening of low-lying localized mode  

Science Journals Connector (OSTI)

We report on new superconductors Ban+2Ir4nGe12n+4 (n = 1, 2) with critical temperatures Tc = 6.1 and 3.2 K, respectively, along with their crystal structures, electron transport, and specific heat. The compounds are composed of alternating Ba@Ir8Ge16 and Ba@Ir2Ge16 cages, both of which are larger in the n = 1 sample than in the n = 2 sample. The normal-state heat capacity reveals two low-lying vibration modes associated with guest Ba cations, and both characteristic temperatures in Ba3Ir4Ge16 are smaller than those in Ba4Ir8Ge28. Meanwhile, the density functional theory calculations reveal that the Ge-4p bands dominated the Fermi level in both samples. We propose that the softening of localized phonons due to expansion of the cage strengthens the electron-phonon coupling between Ba cations and Ge anions, leading to the higher Tc in Ba3Ir4Ge16.

Jiangang Guo, Jun-ichi Yamaura, Hechang Lei, Satoru Matsuishi, Yanpeng Qi, and Hideo Hosono

2013-10-23T23:59:59.000Z

99

In situ ATR-IR spectroscopic and electron microscopic analyses of settlement secretions of Undaria pinnatifida kelp spores  

Science Journals Connector (OSTI)

...and anionic polysaccharides. Energy dispersive X-ray microanalysis...to Australia, New Zealand, Argentina, southern California (USA...is influenced by the surface energy, wettability, modulus and...Phaeophyta) in Golfo Nuevo, Argentina. Hydrobiologia 326/327...

2011-01-01T23:59:59.000Z

100

New estimates of global emissions of N2O from rivers and estuaries  

E-Print Network (OSTI)

from rivers and estuaries. We present total global emissions, as well as regional shares. 2New estimates of global emissions of N2O from rivers and estuaries CAROLIEN KROEZE1 , EGON DUMONT1 rivers and estuaries, using the NEWS-DIN model. NEWS-DIN is a model of the global transport of dissolved

Seitzinger, Sybil

Note: This page contains sample records for the topic "ir microscope n2" 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

Shock-Tube Study of Methane Ignition with NO2 and N2O  

E-Print Network (OSTI)

. The experimental pressure range was 1 - 44 atm and the temperature range tested was 1177 – 2095 K. The additives NO2 and N2O were added in concentrations from 831 ppm to 3539 ppm. The results of the mixtures with NO2 have a reduction in ignition delay time across...

Pemelton, John

2012-10-19T23:59:59.000Z

102

Instanton calculus and nonperturbative relations in N=2 supersymmetric gauge theories  

Science Journals Connector (OSTI)

Using instanton calculus we check, in the weak coupling region, the nonperturbative relation ?Tr?2?=i?[F-(a/2)?F/?a] obtained for a N=2 globally supersymmetric gauge theory. Our computations are performed for instantons of winding number k, up to k=2, and turn out to agree with previous nonperturbative results.

Francesco Fucito and Gabriele Travaglini

1997-01-15T23:59:59.000Z

103

Vibrational spectra of N2: An advanced undergraduate laboratory in atomic and molecular spectroscopy  

E-Print Network (OSTI)

an advanced laboratory course focused on spectroscopy of atoms and molecules, for a diverse and solid#12;Vibrational spectra of N2: An advanced undergraduate laboratory in atomic and molecular to demonstrate molecular spectroscopy by measuring the vibrational energy spacing of nitrogen molecules

Bayram, S. Burçin

104

Sminaire du Groupe N2IS Manipulation of chemicals in droplet-based microfluidics  

E-Print Network (OSTI)

Séminaire du Groupe N2IS Manipulation of chemicals in droplet-based microfluidics Le 06 Septembre TOULOUSE Cedex 4 Résumé Droplet-based microfluidics has a tremendous potential for the miniaturization of chemicals in microfluidic systems is therefore a key to reliably downscale the assays from microtiter plates

Ingrand, François

105

MIS 381N.2 Research in Information Systems: Organizational and Behavioral Perspectives  

E-Print Network (OSTI)

, corporate strategy and IT, business value of IT, knowledge management and organizational learning1 MIS 381N.2 Research in Information Systems: Organizational and Behavioral Perspectives Spring creation, to new organizational, network, and community structures, to a new cadre of business models

Ghosh, Joydeep

106

Ann. Polon. Math., 90, N2, (2007), 145-148. Invisible obstacles  

E-Print Network (OSTI)

Ann. Polon. Math., 90, N2, (2007), 145-148. 1 #12;Invisible obstacles A.G. Ramm Mathematics number will be as small as one wishes. The obstacle is called "invisible" in this case. 1 Introduction ([1]). key words: wave scattering, inverse problems, invisible obstacles AMS subject classification

107

Orientational-ordering transition fcc-Pa3 of Ar1-x(N2)x  

Science Journals Connector (OSTI)

Solid solutions of Ar1-x(N2)x, 0.83

H. Klee and K. Knorr

1991-04-01T23:59:59.000Z

108

CH4 and N2O emissions from Spartina alterniflora and Phragmites australis in experimental mesocosms  

E-Print Network (OSTI)

Author's personal copy CH4 and N2O emissions from Spartina alterniflora and Phragmites australis emissions from S. alterniflora with those from a native C3 plant, Phragmites australis, by establishing Elsevier Ltd. All rights reserved. Keywords: Common reed (Phragmites australis); Brackish marsh mesocosms

Chen, Jiquan

109

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

110

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

111

Standoff imaging of chemicals using IR spectroscopy  

SciTech Connect

Here we report on a standoff spectroscopic technique for identifying chemical residues on surfaces. A hand-held infrared camera was used in conjunction with a wavelength tunable mid-IR quantum cascade laser (QCL) to create hyperspectral image arrays of a target with an explosive residue on its surface. Spectral signatures of the explosive residue (RDX) were extracted from the hyperspectral image arrays and compared with a reference spectrum. Identification of RDX was achieved for residue concentrations of 20 g per cm2 at a distance of 1.5 m, and for 5 g per cm2 at a distance of 15 cm.

Senesac, Larry R [ORNL] [ORNL; Thundat, Thomas George [ORNL] [ORNL; Morales Rodriguez, Marissa E [ORNL] [ORNL

2011-01-01T23:59:59.000Z

112

A Microscopic Double-Slit Experiment  

NLE Websites -- All DOE Office Websites (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.

113

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

114

Multi-instanton calculus in N=2 supersymmetric gauge theory. II. Coupling to matter  

Science Journals Connector (OSTI)

We further discuss the N=2 superinstantons in SU(2) gauge theory, obtained from the general self-dual solutions of topological charge n constructed by Atiyah, Drinfeld, Hitchin, and Manin (ADHM). We realize the N=2 supersymmetry algebra as actions on the superinstanton moduli. This allows us to recast in concise superfield notation our previously obtained expression for the exact classical interaction between n ADHM superinstantons mediated by the adjoint Higgs bosons, and, moreover, to incorporate NF flavors of hypermultiplets. We perform explicit one- and two-instanton checks of the Seiberg-Witten prepotentials for all NF and arbitrary hypermultiplet masses. Our results for the low-energy couplings are all in precise agreement with the predictions of Seiberg and Witten except for NF=4, where we find a finite renormalization of the coupling which is absent in the proposed solution.

Nicholas Dorey; Valentin V. Khoze; Michael P. Mattis

1996-12-15T23:59:59.000Z

115

IY:ILrnr IR-rl?l'  

Office of Legacy Management (LM)

IY:ILrnr IR-rl?l' IY:ILrnr IR-rl?l' w&m PadmmmTuJ tmml' aIs~#l!REm m-t, - 188kwxm BYI alahard 0. cr*rrror cy- r' , ' .~ -' - -' ^ , /' cs< 4. .c :' ; *. .h,- ' (z&&y .' ,/ ;f. .* &J >l a. L \' P" ,,,' ,.' I * :{' \ !' l t ..b c&~ tf ~ , r ,, r. ,* .;;;., k J ;, b $y$' Lrmprrw)rlt&tmxJ- a@. Frqrr at t&i8 raoLli:.y SC\ daummiI~Luualndr8rr~lfCUIf@@?~~oy-~ d )I t rq ,i .* 1 Virium~~bUrlJlOgarspvlr at ma rdutw. (500 p-4 3) i" 1 ) ,ip" 2. rt A8 - u %I* mm 4almpa~&rnbM Itrr+@# vbrp a** -y ;I11 ~*~~*- miw&mmwlrrwrbsr* ~rSthLtL,ort' tar,da*pcr¶.florllj pi &8~wl~cm@n-~ t#barwatla~r~tOf~. hwrl'r#tarr,urueunUr .--,U-L BirLl#a ofmml -vom. pe a ,Tjm-&,, i L) cc (. a 41 IA.9 #y7 /.& r*-rc * &ah&L- '2 , p-

116

Kinetic Isotope Effects in the N2O Decomposition over NiO  

Science Journals Connector (OSTI)

Kinetic Isotope Effects in the N2O Decomposition over NiO ... The 15N and 18O kinetic isotope effects (KIEs) in the catalytic decomposition of nitrous oxide on NiO powder were determined in the temperature range of 625?825 K, and the following temperature dependencies were found:? KIE(15N) = (0.821 ± 0.180) + (1445 ± 128)/T and KIE(18O) = (1.384 ...

Peter Žemva; Antonija Lesar; Ivan Kobal; Marjan Senega?nik

2001-04-21T23:59:59.000Z

117

Instanton calculus, topological field theories and N = 2 super Yang-Mills theories  

Science Journals Connector (OSTI)

The results obtained by Seiberg and Witten for N = 2 supersymmetric theories with gauge group SU(2) are in agreement with instanton computations carried out for winding numbers one and two. This suggests that the instanton saddle point saturates the non-perturbative contribution to the functional integral. A natural framework in which corrections to this approximation are absent is given by the topological field theory built out of the N = 2 Super Yang-Mills theory. After extending the standard construction of the Topological Yang-Mills theory to encompass the case of a non-vanishing vacuum expectation value for the scalar field, a BRST transformation is defined (as a supersymmetry plus a gauge variation), which on the instanton moduli space is the exterior derivative. We then show that each non-perturbative contribution to the N = 2 low-energy effective action can be written as the integral of a total derivative of a function of the instanton moduli. Only instanton configurations of zero conformal size contribute to this result.

Diego Bellisai; Francesco Fucito; Gabriele Travaglini; Alessandro Tanzini

2000-01-01T23:59:59.000Z

118

A decoupled approach for NOx–N2O 3-D CFD modeling in CFB plants  

Science Journals Connector (OSTI)

Abstract In this study, a 3D CFD model for the formation of \\{NOx\\} and N2O in a lignite fired 1.2 MWth CFB pilot plant is developed. The decoupled approach (decoupled from combustion simulation) is tested for the minimization of computational cost. As combustion simulation is prerequired, this was achieved through a simplified 3-D CFD combustion model. The developed model is then applied to the pilot-scale 1.2 MWth CFB plant and validated against experimental data. As concerns the NOx–N2O model, an extensive literature review is also carried out for the incorporation of the appropriate reactions network and respective reaction rates expressions. Results show that homogenous reactions are favoured on the lower section of the bed, due to the abundance of fuel devolatilization products. On the other hand, on the upper section, heterogeneous reactions govern nitric oxide formation/reduction. It is found that for the lignite examined in this work, HCN is released in negligible amounts during char combustion. The proposed and validated CFD model for \\{NOx\\} and N2O, is capable of examining the effect of different operational parameters and coal properties on the overall nitric oxides emissions from a CFB combustor, with low computational cost and without the additional expenses for pilot-scale experiments.

A. Nikolopoulos; I. Malgarinos; N. Nikolopoulos; P. Grammelis; S. Karrelas; E. Kakaras

2014-01-01T23:59:59.000Z

119

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

120

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

Note: This page contains sample records for the topic "ir microscope n2" 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

New Cryogenic Apparatus for FT-IR Spectroscopic Studies  

Science Journals Connector (OSTI)

Cryogenic Fourier transform infrared (FT-IR) spectroscopy, being an effective technique in improving the spectral resolution and signal-to-noise ratio, is utilized in our group....

Kang, Ning; Xu, Yizhuang; Ferraro, J R; Li, Weihong; Weng, Shifu; Xu, Duanfu; Wu, Jinguang; Soloway, R D; Xu, Guangxian

2001-01-01T23:59:59.000Z

122

High-Field Magnetoresistance of IrO2  

Science Journals Connector (OSTI)

The monotonic and oscillatory magnetoresistance of IrO2 is reported and found to be consistent with the Fermi-surface model proposed by Graebner.

W. D. Ryden; W. A. Reed; E. S. Greiner

1972-09-15T23:59:59.000Z

123

ORIGINAL PAPER Short-term effect of tillage intensity on N2O and CO2 emissions  

E-Print Network (OSTI)

ORIGINAL PAPER Short-term effect of tillage intensity on N2O and CO2 emissions Pascal Boeckx negative to positive. We studied the short-term effect of tillage intensity on N2O and CO2 emissions. We site, an intermediately aerated Luvisol in Belgium, were similar. Nitrous oxide and CO2 emissions were

Paris-Sud XI, Université de

124

Single-QCL-based absorption sensor for simultaneous trace-gas detection of CH4 and N2O  

E-Print Network (OSTI)

compact multipass gas cell (MGC). This sensor uses a thermoelectrically cooled, continuous wave­8]. A compact mid-infrared absorption spectrometer for N2O and CH4 was developed using thermoelectrically cooled.04 cm-1 ) and N2O (1274.61 cm-1 ) lines at a 1 Hz repetition rate. Wavelength modulation spec- troscopy

125

A Microscopic Double-Slit Experiment  

NLE Websites -- All DOE Office Websites (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.

126

A Microscopic Double-Slit Experiment  

NLE Websites -- All DOE Office Websites (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.

127

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

128

High resolution measurements of the {sup 241}Am(n,2n) reaction cross section  

SciTech Connect

Measurements of the {sup 241}Am(n,2n) reaction cross section have been performed at the Joint Research Centre (JRC) Geel in the frame of a collaboration between the European Commission (EC) JRC and French laboratories from CNRS and the Commissariat a L'Energie Atomique (CEA) Cadarache. Raw material coming from the Atalante facility of CEA Marcoule has been transformed by JRC Karlsruhe into suitable {sup 241}AmO{sub 2} samples embedded in Al{sub 2}O{sub 3} matrices specifically designed for these measurements. The irradiations were carried out at the 7-MV Van de Graaff accelerator. The {sup 241}Am(n,2n) reaction cross section was determined relative to the {sup 27}Al(n,alpha){sup 24}Na standard cross section. The measurements were performed in four sessions, using quasi-mono-energetic neutrons with energies ranging from 8 to 21 MeV produced via the {sup 2}H(d,n){sup 3}He and the {sup 3}H(d,n){sup 4}He reactions. The induced activity was measured by standard gamma-ray spectrometry using a high-purity germanium detector. Below 15 MeV, the present results are in agreement with data obtained earlier. Above 15 MeV, these measurements allowed the experimental investigation of the {sup 241}Am(n,2n) reaction cross section for the first time. The present data are in good agreement with predictions obtained with the talys code that uses an optical and fission model developed at CEA.

Sage, C. [Commissariat a L'Energie Atomique Saclay, DSM/IRFU/SPhN, F-91191 Gif-sur-Yvette (France); European Commission, Joint Research Centre, Institute for Reference Materials and Measurements, Retieseweg 111, B-2440 Geel (Belgium); Commissariat a L'Energie Atomique Cadarache, DEN/CAD/DER/SPRC/LEPh, F-13108 St Paul-lez-Durance (France); Institut Pluridisciplinaire Hubert Curien, F-67037 Strasbourg (France); Semkova, V. [European Commission, Joint Research Centre, Institute for Reference Materials and Measurements, Retieseweg 111, B-2440 Geel (Belgium); Institute for Nuclear Research and Nuclear Energy, Bulgarian Academy of Sciences, BG-1784 Sofia (Bulgaria); Bouland, O. [Commissariat a L'Energie Atomique Cadarache, DEN/CAD/DER/SPRC/LEPh, F-13108 St Paul-lez-Durance (France); Los Alamos National Laboratory, Theoretical Division, Los Alamos, New Mexico 87545 (United States); Dessagne, P.; Rudolf, G. [Institut Pluridisciplinaire Hubert Curien, F-67037 Strasbourg (France); Fernandez, A.; Naestren, C.; Ottmar, H.; Somers, J.; Wastin, F. [European Commission, Joint Research Centre, Institute for Transuranium Elements, Postfach 2340, D-76125 Karlsruhe (Germany); Gunsing, F. [Commissariat a L'Energie Atomique Saclay, DSM/IRFU/SPhN, F-91191 Gif-sur-Yvette (France); Noguere, G. [Commissariat a L'Energie Atomique Cadarache, DEN/CAD/DER/SPRC/LEPh, F-13108 St Paul-lez-Durance (France); Plompen, A. J. M. [European Commission, Joint Research Centre, Institute for Reference Materials and Measurements, Retieseweg 111, B-2440 Geel (Belgium); Romain, P. [Commissariat a L'Energie Atomique, DAM, DIF, F-91297 Arpajon (France)

2010-06-15T23:59:59.000Z

129

The free energy of N=2 supersymmetric AdS_4 solutions of M-theory  

E-Print Network (OSTI)

We show that general N=2 supersymmetric AdS_4 solutions of M-theory with non-zero M2-brane charge admit a canonical contact structure. The free energy of the dual superconformal field theory on S^3 and the scaling dimensions of operators dual to supersymmetric wrapped M5-branes are expressed via AdS/CFT in terms of contact volumes. In particular, this leads to topological and localization formulae for the coefficient of N^{3/2} in the free energy of such solutions.

Maxime Gabella; Dario Martelli; Achilleas Passias; James Sparks

2011-07-25T23:59:59.000Z

130

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

131

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

132

Growth of graphene on Ir(111) Johann Coraux1  

E-Print Network (OSTI)

Growth of graphene on Ir(111) Johann Coraux1 ,, Alpha T. N'Diaye1 §, Martin Engler1 , Carsten Busse a renewed interest as a route towards high quality graphene prepared in a reproducible manner. Here we employ two growth methods for graphene on Ir(111), namely room temperature adsorption and thermal

Paris-Sud XI, Université de

133

Which Oxidation State Leads to O-O Bond Formation in Cp*Ir(bpy)Cl-Catalyzed Water Oxidation, Ir(V), Ir(VI), or Ir(VII)?  

E-Print Network (OSTI)

Which Oxidation State Leads to O-O Bond Formation in Cp*Ir(bpy)Cl-Catalyzed Water Oxidation, Ir: Density functional calculations are used to revisit the reaction mechanism of water oxidation catalyzed oxidation at higher oxidation state even though it can also promote O-O bond formation. Therefore, [(bpy

Liao, Rongzhen

134

IR Vibration-Rotation Spectra of the Ammonia Molecule  

Science Journals Connector (OSTI)

The IR spectrum of the ammonia inversion vibration-rotation normal mode is obtained using Fourier Transform IR Spectroscopy and analyzed using Maple, to easily obatin the relation between the N-H bond length and the H-N-H bond angle. As expected, the ...

Carl W. David

1996-01-01T23:59:59.000Z

135

Excitation of the C? 3? u state of N2 by electron impact  

Science Journals Connector (OSTI)

The ?=3371 Ĺ spectral band of the C? 3? u ?B? 3? g (v?=0 v ?=0) second positive system is investigated using time?resolved spectroscopy with electron beam pulse widths of 100 nsec 260 nsec and 5 ?sec. Lifetime data for the v?=0 vibrational level of the C? 3? u electronic state are obtained for incident electron energies and N2 gas pressures in the range 25–200 eV and 2–380 mtorr respectively. In the case of the 260 nsec electron pulse a single radiative decay component is observed which exhibits a dependence upon electron impact energy. However in the case of a 5 ?sec excitation pulse the resulting radiative decay is observed to consist of two decay components. The short?lived component is identified as the primary C? 3? u state excitation while the long?lived component is identified as the radiative cascade contribution from higher electronic states including possibly the metastable E? 3?+ g state. When the long?lived cascade contribution is subtracted from the total C? 3? u population the C state natural radiative lifetime becomes independent of energy. In addition the lifetime is observed to be independent of N2 gas pressure over the pressure range ?2–380 mtorr.

S. T. Chen; Richard J. Anderson

1975-01-01T23:59:59.000Z

136

Operator-Schmidt decomposition of the quantum Fourier transform on C^N1 tensor C^N2  

E-Print Network (OSTI)

Operator-Schmidt decompositions of the quantum Fourier transform on C^N1 tensor C^N2 are computed for all N1, N2 > 1. The decomposition is shown to be completely degenerate when N1 is a factor of N2 and when N1>N2. The first known special case, N1=N2=2^n, was computed by Nielsen in his study of the communication cost of computing the quantum Fourier transform of a collection of qubits equally distributed between two parties. [M. A. Nielsen, PhD Thesis, University of New Mexico (1998), Chapter 6, arXiv:quant-ph/0011036.] More generally, the special case N1=2^n1<2^n2=N2 was computed by Nielsen et. al. in their study of strength measures of quantum operations. [M.A. Nielsen et. al, (accepted for publication in Phys Rev A); arXiv:quant-ph/0208077.] Given the Schmidt decompositions presented here, it follows that in all cases the communication cost of exact computation of the quantum Fourier transform is maximal.

Jon Tyson

2002-10-13T23:59:59.000Z

137

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

138

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

139

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

140

Physisorption of N2, O2, and CO on Fully Oxidized TiO2(110)  

SciTech Connect

Physisorption of N2, O2 and CO was studied on fully oxidized TiO2(110) using beam reflection and temperature programmed desorption (TPD) techniques. Sticking coefficients for all three molecules are nearly equal (0.75 ± 0.05) and approximately independent of coverage suggesting that adsorption occurs via a precursor mediated mechanism. Excluding multilayer coverages, the TPD spectra for all three adsorbates exhibit three distinct coverage regimes that can be interpreted in accord with previous theoretical studies of N2 adsorption. At low coverages (0 to 0.5 N2/Ti4+), N2 molecules bind head-on to five-coordinated Ti4+ ions. The adsorption occurs preferentially on the Ti4+ sites that do not have neighboring adsorbates. This arrangement minimizes the repulsive interactions between the adsorbed molecules along the Ti4+ rows resulting in a relatively small shift of the TPD peak (105 ? 90 K) with increasing coverage. At higher N2 coverages (0 to 1.0 N2/Ti4+) the nearest-neighbor Ti4+ sites become occupied. The close proximity of the adsorbates results in strong repulsion thus giving rise to a significant shift of the TPD leading edges (90 ? 45 K) with increasing coverage. For N2/Ti4+ > 1, an additional low temperature peak (~ 43 K) is present and is ascribed to N2 adsorption on bridge-bonded oxygen rows. The results for O2 and CO are qualitatively similar. The repulsive adsorbate-adsorbate interactions largest for CO, most likely due to aligned CO dipole moments. The coverage dependent binding energies of O2, N2, and CO are determined by inverting TPD profiles.

Dohnalek, Zdenek; Kim, Jooho; Bondarchuk, Oleksander A.; White, J. M.; Kay, Bruce D.

2006-03-30T23:59:59.000Z

Note: This page contains sample records for the topic "ir microscope n2" 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

A compact scanning soft X-ray microscope  

SciTech Connect

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

142

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

143

Microscopic Reactive Diffusion of Uranium in the Contaminated...  

NLE Websites -- All DOE Office Websites (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...

144

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

NLE Websites -- All DOE Office Websites (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...

145

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

146

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

NLE Websites -- All DOE Office Websites (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...

147

Receptor Specificity and Transmission of H2N2 Subtype Viruses Isolated from the Pandemic of 1957  

E-Print Network (OSTI)

Influenza viruses of the H2N2 subtype have not circulated among humans in over 40 years. The occasional isolation of avian H2 strains from swine and avian species coupled with waning population immunity to H2 hemagglutinin ...

Pappas, Claudia

148

Gas?Kinetic Temperature of Planar High?Frequency Capacitive Discharge Plasma in N2/CO2/He Gas Mixtures  

Science Journals Connector (OSTI)

Using methods of emission spectroscopy, we have determined the gas?kinetic temperature fields of planar high?frequency capacitive discharge plasma in N2/CO2/He gas mixtures depending on the excitation frequency, ...

V. V. Azharonok; I. I. Filatova; V. D. Shimanovich…

2001-09-01T23:59:59.000Z

149

Line shape in the low-frequency wing of N2 and O2 broadened CO2 lines  

Science Journals Connector (OSTI)

The shape of the far wings of N2 and O2 broadened CO2 lines have been investigated, at room temperature, in the 2140–2250-cm?1 spectral...

Menoux, V; Le Doucen, R; Boulet, C

1987-01-01T23:59:59.000Z

150

N=2 supersymmetric extension of a hydrodynamic system in Riemann invariants  

SciTech Connect

In this paper, we formulate an N=2 supersymmetric extension of a hydrodynamic-type system involving Riemann invariants. The supersymmetric version is constructed by means of a superspace and superfield formalism, using bosonic superfields, and consists of a system of partial differential equations involving both bosonic and fermionic variables. We make use of group-theoretical methods in order to analyze the extended model algebraically. Specifically, we calculate a Lie superalgebra of symmetries of our supersymmetric model and make use of a general classification method to classify the one-dimensional subalgebras into conjugacy classes. As a result we obtain a set of 401 one-dimensional nonequivalent subalgebras. For selected subalgebras, we use the symmetry reduction method applied to Grassmann-valued equations in order to determine analytic exact solutions of our supersymmetric model. These solutions include traveling waves, bumps, kinks, double-periodic solutions, and solutions involving exponentials and radicals.

Grundland, A. M. [Centre de Recherches Mathematiques, Universite de Montreal, C.P. 6128, Succ. Centre-ville, Montreal, Quebec H3C 3J7 (Canada); Universite du Quebec, Trois-Rivieres, C.P. 500, Quebec G9A 5H7 (Canada); Hariton, A. J. [Centre de Recherches Mathematiques, Universite de Montreal, C.P. 6128, Succ. Centre-ville, Montreal, Quebec H3C 3J7 (Canada)

2009-07-15T23:59:59.000Z

151

N=2 minimal conformal field theories and matrix bifactorisations of x^d  

E-Print Network (OSTI)

We prove a tensor equivalence between full subcategories of a) graded matrix factorisations of the potential x^d-y^d and b) representations of the N=2 minimal super vertex operator algebra at central charge 3-6/d, where d is odd. The subcategories are given by a) permutation-type matrix factorisations with consecutive index sets, and b) Neveu-Schwarz-type representations. The physical motivation for this result is the Landau-Ginzburg / conformal field theory correspondence, where it amounts to the equivalence of a subset of defects on both sides of the correspondence. Our work builds on results by Brunner and Roggenkamp [arXiv:0707.0922], where an isomorphism of fusion rules was established.

Davydov, Alexei; Runkel, Ingo

2014-01-01T23:59:59.000Z

152

N=2 minimal conformal field theories and matrix bifactorisations of x^d  

E-Print Network (OSTI)

We prove a tensor equivalence between full subcategories of a) graded matrix factorisations of the potential x^d-y^d and b) representations of the N=2 minimal super vertex operator algebra at central charge 3-6/d, where d is odd. The subcategories are given by a) permutation-type matrix factorisations with consecutive index sets, and b) Neveu-Schwarz-type representations. The physical motivation for this result is the Landau-Ginzburg / conformal field theory correspondence, where it amounts to the equivalence of a subset of defects on both sides of the correspondence. Our work builds on results by Brunner and Roggenkamp [arXiv:0707.0922], where an isomorphism of fusion rules was established.

Alexei Davydov; Ana Ros Camacho; Ingo Runkel

2014-09-07T23:59:59.000Z

153

Feather-like He plasma plumes in surrounding N2 gas  

Science Journals Connector (OSTI)

Effects of surrounding gases on the propagation of room-temperature atmospheric-pressure plasma jets are reported. A highly unusual feather-like plasma plume is observed only when N2 is used as surrounding gas. The He concentration on the axis at the starting point of the feather-like plume is ?0.85 of the maximum value and is independent on the He flow rates. High-speed optical imaging reveals that dim diffuse plasmas emerge just behind the bright head of the plasma bullet at the starting point of the feather-like plume. These results help tailoring surface exposure in emerging applications of plasma jets in medicine and nanotechnology.

X. P. Lu; Y. Pan; K. Ostrikov

2013-01-01T23:59:59.000Z

154

Large rank Wilson loops in N=2 superconformal QCD at strong coupling  

E-Print Network (OSTI)

We compute the expectation values of circular Wilson loops in large representations at strong coupling, in the large-N limit of the N=2 superconformal theory with SU(N) gauge group and 2N hypermultiplets. Employing Pestun's matrix integral, we focus attention on symmetric and antisymmetric representations with ranks of order N. We find that large rank antisymmetric loops are independent of the coupling at strong 't Hooft coupling while symmetric Wilson loops grow exponentially with it. Symmetric loops display a non-analyticity as a function of the rank, characterized by the splitting of a single matrix model eigenvalue from the continuum, bearing close resemblance to Bose-Einstein condensation in an ideal gas. We discuss implications of these for a putative large-N string dual. The method of calculation we adopt makes explicit the connection to Fermi and Bose gas descriptions and also suggests a tantalizing connection of the above system to a multichannel Kondo model.

Benedict Fraser; S. Prem Kumar

2012-02-28T23:59:59.000Z

155

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

156

The Application of IR Spectroscopy to the Investigation of Minerals  

Science Journals Connector (OSTI)

Traditionally, the application of IR spectroscopy in mineralogy is reduced to the determination of wavelengths or frequencies of discrete absorption maxima. These values are brought in correspondence with normal ...

Nikita V. Chukanov

2014-01-01T23:59:59.000Z

157

DWEA Webinar: IRS Guidance for Small Wind Turbines  

Energy.gov (U.S. Department of Energy (DOE))

The U.S. Internal Revenue Service (IRS) has issued Notice 2015-4 providing new performance and quality standards of small wind turbines – defined as having a nameplate capacity of up to 100 kW – in...

158

Gas Analysis with IR-Diode Laser Spectrometers  

Science Journals Connector (OSTI)

An IR laser diode spectrometer of modular design with micro-processor control is presented. ... It consists of laser source (vibration decoupled refrigerator with temperature control unit and laser power...

Gerhard Schmidtke; Wolfgang Julius Riedel…

1984-01-01T23:59:59.000Z

159

Gas analysis with IR-diode laser spectrometers  

Science Journals Connector (OSTI)

An IR laser diode spectrometer of modular design with micro-processor control is presented. ... It consists of laser source (vibration decoupled refrigerator with temperature control unit and laser power...

Gerhard Schmidtke; Wolfgang Julius Riedel…

1984-01-01T23:59:59.000Z

160

IR Spectra of Dense Xenon and Argon Plasmas  

Science Journals Connector (OSTI)

The results are presented of experimental studies of IR radiation spectra of dense Xe and Ar shock compressed plasmas. The radiation cutoff is found at the wavelength ??1?mThe experimental data are interpreted...

V. E. Fortov; M. U. Kulish; V. B. Mintsev; J. Ortner…

1992-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "ir microscope n2" 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

US-LHC IR magnet error analysis and compensation  

SciTech Connect

This paper studies the impact of the insertion-region (IR) magnet field errors on LHC collision performance. Compensation schemes including magnet orientation optimization, body-end compensation, tuning shims, and local nonlinear correction are shown to be highly effective.

Wei, J.; Ptitsin, V.; Pilat, F.; Tepikian, S. [Brookhaven National Lab., Upton, NY (United States); Gelfand, N.; Wan, W.; Holt, J. [Fermi National Accelerator Lab., Batavia, IL (United States)

1998-08-01T23:59:59.000Z

162

US-LHC IR MAGNET ERROR ANALYSIS AND COMPENSATION.  

SciTech Connect

This paper studies the impact of the insertion-region (IR) magnet field errors on LHC collision performance. Compensation schemes including magnet orientation optimization, body-end compensation, tuning shims, and local nonlinear correction are shown to be highly effective.

WEI, J.

1998-06-26T23:59:59.000Z

163

IRS Announces New Tribal Economic Development Bond Allocation Guidance |  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

IRS Announces New Tribal Economic Development Bond Allocation IRS Announces New Tribal Economic Development Bond Allocation Guidance IRS Announces New Tribal Economic Development Bond Allocation Guidance July 18, 2012 - 3:46pm Addthis To promote economic growth in tribal communities, Treasury and the Internal Revenue Service (IRS) published new guidance on July 18, 2012, allocating Tribal Economic Development Bonds (TEDBs). The TEDB program was established under the American Reinvestment and Recovery Act, and provides Tribes with the authority to issue tax-exempt debt for a wider range of activities to spur job creation and promote economic growth in Indian country. Providing Tribes with the ability to issue tax-exempt debt for a broader scope of activities similar to that available to states and local governments lowers

164

Data-based estimates of suboxia, denitrification, and N2O production in the ocean and their sensitivities to dissolved O2  

E-Print Network (OSTI)

pathways, N2O is a powerful greenhouse gas that affects the Earth's energy balance and climate. The ocean

165

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

166

NCEM National Center for Electron Microscopy: Microscopes and Facilities:  

NLE Websites -- All DOE Office Websites (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

167

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

168

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

169

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

170

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

171

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

172

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

173

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

174

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

175

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

176

Impact of Prior Seasonal H3N2 Influenza Vaccination or Infection on Protection and Transmission of Emerging Variants of Influenza A(H3N2)v Virus in Ferrets  

Science Journals Connector (OSTI)

...Emerging Variants of Influenza A(H3N2)v Virus in Ferrets Katherine V. Houser a b Melissa B. Pearce a Jacqueline M. Katz a Terrence...infection. J. Virol. 75 :5141-5150. 21. Harvey, R , JX Wheeler, CL Wallis, JS Robertson, and OG Engelhardt. 2008. Quantitation...

Katherine V. Houser; Melissa B. Pearce; Jacqueline M. Katz; Terrence M. Tumpey

2013-10-02T23:59:59.000Z

177

Installation of the MAXIMUM microscope at the ALS  

SciTech Connect

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

178

Soft x-ray laser microscope. Final report  

SciTech Connect

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

179

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

180

ARM - Field Campaign - IR Cloud Camera Feasibility Study  

NLE Websites -- All DOE Office Websites (Extended Search)

govCampaignsIR Cloud Camera Feasibility Study govCampaignsIR Cloud Camera Feasibility Study Comments? We would love to hear from you! Send us a note below or call us at 1-888-ARM-DATA. Send Campaign : IR Cloud Camera Feasibility Study 2010.12.06 - 2010.12.13 Lead Scientist : Kyle Leesman For data sets, see below. Description During December 2010, a prototype LWIR cloud camera system was deployed at the Southern Great Plains Guest Instrument Facility (SGP-GIF). The system consisted of a microbolometer camera (~7-15 ìm) to capture sky imagery, a blackbody calibration source, and a GPS receiver used to estimate atmospheric column water vapor and constrain atmospheric compensation. The camera system collected calibrated sky radiance images co-incident with the SGP Central Facility with the goal of quantitatively assessing its ability

Note: This page contains sample records for the topic "ir microscope n2" 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

Boltzmann Equation Analysis of Electron Transport in a N2O2 Streamer Discharge Sasa Dujko1;2;3  

E-Print Network (OSTI)

Boltzmann Equation Analysis of Electron Transport in a N2­O2 Streamer Discharge Sasa Dujko1;2;3�, P. O. Box 68, Zemun, Belgrade 11080, Serbia 3 ARC Centre for Antimatter­Matter Studies, School of the reduced electric field. The fluid model is coupled with the Monte Carlo model via a model interface

Ebert, Ute

182

Ann. Polon. Math., 95, N2, (2009), 135-139. A DSM proof of surjectivity of monotone  

E-Print Network (OSTI)

Ann. Polon. Math., 95, N2, (2009), 135-139. 1 #12;A DSM proof of surjectivity of monotone nonlinear. The proof is based on the Dynamical Systems Method (DSM). MSC: 47A52 Key words: dynamical systems method of this result. It is based on the Dynamical Systems Method (DSM) developed in [2]. Theorem 1.1. Assume that F

183

Jeffrey R. Row Environment and Resource Studies, University of Waterloo, Waterloo, Ontario, Canada, N2L 3G1  

E-Print Network (OSTI)

, N2L 3G1 Website: http://jeffrow.ca · Email: jeff.row@me.com · Phone: 1-416-399-3066 1 Education 2006 and population structure of foxsnakes across spatial and temporal scales. 2003-2005 M.Sc. Biology, University (Lampropeltis triangulum). 1997-2001 B.Sc. Environmental Biology, Queen's University, Kingston, Ontario. 2

Row, Jeffrey R.

184

The role of N2O derived from crop-based biofuels, and from agriculture in general, in Earth's climate  

Science Journals Connector (OSTI)

...The role of N2O derived from crop-based biofuels, and from agriculture in general, in Earth's...factor (EF) of 3-5%, and applied it to biofuel production. For first-generation biofuels, e.g. biodiesel from rapeseed and bioethanol...

2012-01-01T23:59:59.000Z

185

N2O emission from a combined ex-situ nitrification and in-situ denitrification bioreactor landfill  

Science Journals Connector (OSTI)

Abstract A combined process comprised of ex-situ nitrification in an aged refuse bioreactor (designated as A bioreactor) and in-situ denitrification in a fresh refuse bioreactor (designated as F bioreactor) was constructed for investigating N2O emission during the stabilization of municipal solid waste (MSW). The results showed that N2O concentration in the F bioreactor varied from undetectable to about 130 ppm, while it was much higher in the A bioreactor with the concentration varying from undetectable to about 900 ppm. The greatly differences of continuous monitoring of N2O emission after leachate cross recirculation in each period were primarily attributed to the stabilization degree of MSW. Moreover, the variation of N2O concentration was closely related to the leachate quality in both bioreactors and it was mainly affected by the COD and COD/TN ratio of leachate from the F bioreactor, as well as the DO, ORP, and NO3?-N of leachate from the A bioreactor.

Ya-nan Wang; Ying-jie Sun; Lei Wang; Xiao-jie Sun; Hao Wu; Rong-xing Bian; Jing-jing Li

2014-01-01T23:59:59.000Z

186

UNIVERSITY OF CALIFORNIA, SAN DIEGO Continuous Measurements of Atmospheric Ar/N2 as a Tracer of  

E-Print Network (OSTI)

........................... 31 2.3 Results ................................................. 34 2.3.1 Comparison of station measurements and model predictions ....................... 34 2.3.2 Station-station comparisons ........................................... 74 #12;v 3.2 The seasonal cycle in (Ar/N2): A transient model of air-sea gas flux

Keeling, Ralph

187

Low Dose IR Creates an Oncogenic Microenvironment by Inducing Premature  

SciTech Connect

Introduction Much of the work addressing ionizing radiation-induced cellular response has been carried out mainly with the traditional cell culture technique involving only one cell type, how cellular response to IR is influenced by the tissue microenvironment remains elusive. By use of a three-dimensional (3D) co-culture system to model critical interactions of different cell types with their neighbors and with their environment, we recently showed that low-dose IR-induced extracellular signaling via the tissue environment affects profoundly cellular responses. This proposal aims at determining the response of mammary epithelial cells in a tissue-like setting.

Yuan, Zhi-Min [Harvard School of Public Health

2013-04-28T23:59:59.000Z

188

Mid-IR FORCAST/SOFIA Observations of M82  

E-Print Network (OSTI)

We present 75"x75" size maps of M82 at 6.4 micron, 6.6 micron, 7.7 micron, 31.5 micron, and 37.1 micron with a resolution of ~4" that we have obtained with the mid-IR camera FORCAST on SOFIA. We find strong emission from the inner 60" (~1kpc) along the major axis, with the main peak 5" west-southwest of the nucleus and a secondary peak 4" east-northeast of the nucleus. The detailed morphology of the emission differs among the bands, which is likely due to different dust components dominating the continuum emission at short mid-IR wavelengths and long mid-IR wavelengths. We include Spitzer-IRS and Herschel/PACS 70 micron data to fit spectral energy distribution templates at both emission peaks. The best fitting templates have extinctions of A_V = 18 and A_V = 9 toward the main and secondary emission peak and we estimated a color temperature of 68 K at both peaks from the 31 micron and 37 micron measurement. At the emission peaks the estimated dust masses are on the order of 10^{4} M_sun.

Nikola, T; Vacca, W D; Adams, J D; De Buizer, J M; Gull, G E; Henderson, C P; Keller, L D; Morris, M R; Schoenwald, J; Stacey, G; Tielens, A

2012-01-01T23:59:59.000Z

189

Interference effects in IR photon echo spectroscopy of liquid water  

SciTech Connect

Heterodyne-detected transient grating experiments on the OH-stretch mode of HDO dissolved in D{sub 2}O resolve two distinctly different contributions originating from the initially excited OH stretch and the OD stretch which is thermally activated during the OH population relaxation. It is demonstrated that interference of both contributions greatly affects the outcome of IR photon echo experiments.

Yeremenko, Sergey; Pshenichnikov, Maxim S.; Wiersma, Douwe A. [Ultrafast Laser and Spectroscopy Laboratory, Materials Science Centre, University of Groningen, Nijenborgh 4, 9747 AG Groningen (Netherlands)

2006-02-15T23:59:59.000Z

190

Ecological and agricultural applications of synchrotron IR microscopy  

E-Print Network (OSTI)

Ecological and agricultural applications of synchrotron IR microscopy T.K. Raab a,*, J.P. Vogel b factors to the fungus Erysiphe cichoracearum, a causative agent of powdery mildew disease. Three genes to pro- liferate when environmental conditions and re- sources are optimum. Cellulose, an abundant

191

WEB QUERY STRUCTURE: IMPLICATIONS FOR IR SYSTEM DESIGN  

E-Print Network (OSTI)

WEB QUERY STRUCTURE: IMPLICATIONS FOR IR SYSTEM DESIGN Bernard J. Jansen Computer Science Program Military Academy West Point, New York 10996 Please Cite: Jansen, B. J., Spink, A., & Pfaff, A. 2000. Web in the context of the Web (Jansen, Spink, & Saracevic, 2000; Jansen and Pooch (under review), Lawrence & Giles

Jansen, James

192

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

193

A new scanning photoemission microscope for ELETTRA: SuperMAXIMUM  

SciTech Connect

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

194

Determination of the cross sections of (n,2n), (n,gamma) nuclear reactions on germanium isotopes at the energy of neutrons 13.96 MeV  

E-Print Network (OSTI)

The cross sections of 70Ge(n,2n)69Ge, 72Ge(n,2n)71Ge, 76Ge(n,gamma)77(g+0.21m)Ge, 76Ge(n,2n)75Ge nuclear reactions were measured at the energy of neutrons 13.96(6) MeV by activation method with gamma-ray and X-ray spectra studies.

S. V. Begun; O. G. Druzheruchenko; O. O. Pupirina; V. K. Tarakanov

2007-01-23T23:59:59.000Z

195

Analyses spectroscopiques d'un plasma CO2-N2 (97%-3%), de type atmosphre martienne, par torche ICP  

E-Print Network (OSTI)

Analyses spectroscopiques d'un plasma CO2-N2 (97%-3%), de type atmosphère martienne, par torche ICP couplage inductif, fonctionnant à la pression atmosphérique, est utilisée pour créer un plasma à partir d Electrique et Plasmas Thermiques, CNRS, 24 Av. des Landais, F63177 Aubière cedex,France, (2) Laboratoire d

Boyer, Edmond

196

A COMPARATIVE ASTROCHEMICAL STUDY OF THE HIGH-MASS PROTOSTELLAR OBJECTS NGC 7538 IRS 9 AND IRS 1  

SciTech Connect

We report the results of a spectroscopic study of the high-mass protostellar object NGC 7538 IRS 9 and compare our observations to published data on the nearby object NGC 7538 IRS 1. Both objects originated in the same molecular cloud and appear to be at different points in their evolutionary histories, offering an unusual opportunity to study the temporal evolution of envelope chemistry in objects sharing a presumably identical starting composition. Observations were made with the Texas Echelon Cross Echelle Spectrograph, a sensitive, high spectral resolution (R {lambda}/{Delta}{lambda} {approx_equal} 100,000) mid-infrared grating spectrometer. Forty-six individual lines in vibrational modes of the molecules C{sub 2}H{sub 2}, CH{sub 4}, HCN, NH{sub 3}, and CO were detected, including two isotopologues ({sup 13}CO, {sup 12}C{sup 18}O) and one combination mode ({nu}{sub 4} + {nu}{sub 5} C{sub 2}H{sub 2}). Fitting synthetic spectra to the data yielded the Doppler shift, excitation temperature, Doppler b parameter, column density, and covering factor for each molecule observed; we also computed column density upper limits for lines and species not detected, such as HNCO and OCS. We find differences among spectra of the two objects likely attributable to their differing radiation and thermal environments. Temperatures and column densities for the two objects are generally consistent, while the larger line widths toward IRS 9 result in less saturated lines than those toward IRS 1. Finally, we compute an upper limit on the size of the continuum-emitting region ({approx}2000 AU) and use this constraint and our spectroscopy results to construct a schematic model of IRS 9.

Barentine, John C.; Lacy, John H. [Department of Astronomy, University of Texas at Austin, 1 University Station, C1400, Austin, TX 78712-0259 (United States)

2012-10-01T23:59:59.000Z

197

N=2 supersymmetric a=4-Korteweg-de Vries hierarchy derived via Gardner's deformation of Kaup-Boussinesq equation  

SciTech Connect

We consider the problem of constructing Gardner's deformations for the N=2 supersymmetric a=4-Korteweg-de Vries (SKdV) equation; such deformations yield recurrence relations between the super-Hamiltonians of the hierarchy. We prove the nonexistence of supersymmetry-invariant deformations that retract to Gardner's formulas for the Korteweg-de Vries (KdV) with equation under the component reduction. At the same time, we propose a two-step scheme for the recursive production of the integrals of motion for the N=2, a=4-SKdV. First, we find a new Gardner's deformation of the Kaup-Boussinesq equation, which is contained in the bosonic limit of the superhierarchy. This yields the recurrence relation between the Hamiltonians of the limit, whence we determine the bosonic super-Hamiltonians of the full N=2, a=4-SKdV hierarchy. Our method is applicable toward the solution of Gardner's deformation problems for other supersymmetric KdV-type systems.

Hussin, V. [Departement de Mathematiques et de Statistique, Universite de Montreal, C.P. 6128, succ. Centre-ville, Montreal, Quebec H3C 3J7 (Canada); Kiselev, A. V. [Mathematical Institute, University of Utrecht, P.O. Box 80.010, 3508 TA Utrecht (Netherlands); Krutov, A. O. [Department of Higher Mathematics, Ivanovo State Power University, 34 Rabfakovskaya str., Ivanovo 153003 (Russian Federation); Wolf, T. [Department of Mathematics, Brock University, 500 Glenridge Avenue, St. Catharines, Ontario L2S 3A1 (Canada)

2010-08-15T23:59:59.000Z

198

Influence of propane on CO2/CH4 and N2/CH4 separations in CHA zeolite membranes  

Science Journals Connector (OSTI)

Abstract Two types of CHA zeolite membranes (SAPO-34, SSZ-13) were used for CO2/CH4, N2/CH4, and CO2/i-butane separations at both low (270 and 350 kPa) and high (1.73 MPa) pressures. The SSZ-13 membranes were more selective, with CO2/CH4 separation selectivities as high as 280 and N2/CH4 separation selectivities of 12 at 270 kPa feed pressure. For both types of membranes, selectivities and permeances decreased as the feed pressure increased. The CO2/i-butane separation selectivities were greater than 500,000 for SAPO-34 membranes, indicating extremely low densities of defects because i-butane is too large to enter the CHA pores. The CO2/i-butane selectivities were smaller for SSZ-13 membranes (2,800–20,000), in part because the SSZ-13 layer was on the outside of the porous mullite tubes and sealing the membrane on the zeolite surface was more difficult than for the SAPO-34 membranes that were grown on the inside of glazed alumina tubes. Propane, in feed concentrations from 1 to 9%, significantly influenced separations by decreasing permeances in most cases. The effect was larger for N2/CH4 than for CO2/CH4 mixtures, apparently because the more strongly-adsorbing CO2 competes better than N2 with propane for adsorption sites. Although propane caused permeances to decrease significantly over time, selectivities decreased much less. Propane decreased permeances more for SAPO-34 membranes than for SSZ-13 membranes at 350 kPa, and at high pressure propane even increased CO2 permeances and decreased CH4 permeances in SSZ-13 membranes, thus significantly increasing CO2/CH4 selectivities. Propane permeances reached steady state relatively quickly because its permeation was mostly through defects, but CO2, N2, and CH4 permeances did not stabilize in the presence of propane, even after seven days. The effects of propane were reversible when it was removed from the feed and the membranes were heated.

Ting Wu; Merritt C. Diaz; Yihong Zheng; Rongfei Zhou; Hans H. Funke; John L. Falconer; Richard D. Noble

2015-01-01T23:59:59.000Z

199

Calculation ofZ eff from plasma resistivity in IR-T1 tokamak  

Science Journals Connector (OSTI)

We estimatedZ eff in the IR-T1 tokamak through anomaly factor. The IR-T1 tokamak is a small air-core transformer tokamak with circular cross section and with out... ...

M. Mahmoodi Darian; M. Ghoranneviss; M. K. Salem…

2004-03-01T23:59:59.000Z

200

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

Note: This page contains sample records for the topic "ir microscope n2" 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

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.

202

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

203

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

204

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

205

Ir L (I.~ DEPARTMENT OF ENERGY ALBUQUERQUE OPERATIONS OFFICE  

Office of Legacy Management (LM)

Ir Ir L (I.~ DEPARTMENT OF ENERGY ALBUQUERQUE OPERATIONS OFFICE I.: ~ CONTRACT NO. DE-AC04-83AL18796 1. Vicinity Property i: Completion Report i , . Remedial Actions , cContractor 4,. -~'~ ~for the Uranium Mill Tailings ~~~z ~ Remedial Actions Project - MK-FEROUSON COMPANY *C~Ad PEE *CMIWN>tfIOW VICINITY PROPERTY COMPLETION REPORT AT CA-401 MAYERS STREET BRIDGEVILLE, PA 15017 JUNE 30, 1987 FOR URANIUM MILL TAILINGS REMEDIAL ACTION PROJECT OFFICE ALBUQUERQUE OPERATIONS OFFICE U.S. DEPARTMENT OF ENERGY ALBUQUERQUE, NM BY MK-FERGUSON CC IPANY AND CHEM-NUCLEAR SYSTEMS, INC. MK-Ferguson Company has been granted authorization to perform remedial action under the Uranium Mill Tailings Radiation Control Act of 1978, Public Law 95-604. Remedial action was done in accordance to the EPA Standards for

206

The starburst phenomenon from the optical/near-IR perspective  

E-Print Network (OSTI)

The optical/near-IR stellar continuum carries unique information about the stellar population in a galaxy, its mass function and star-formation history. Star-forming regions display rich emission-line spectra from which we can derive the dust and gas distribution, map velocity fields, metallicities and young massive stars and locate shocks and stellar winds. All this information is very useful in the dissection of the starburst phenomenon. We discuss a few of the advantages and limitations of observations in the optical/near-IR region and focus on some results. Special attention is given to the role of interactions and mergers and observations of the relatively dust-free starburst dwarfs. In the future we expect new and refined diagnostic tools to provide us with more detailed information about the IMF, strength and duration of the burst and its triggering mechanisms.

Nils Bergvall; Thomas Marquart; Göran Östlin; Erik Zackrisson

2004-12-06T23:59:59.000Z

207

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

208

Epitaxial HTS bolometers on silicon for IR detection  

SciTech Connect

Silicon wafers have shown promise for the fabrication of photothermal IR detectors (i.e., bolometers) from epitaxial HTS thin films of YBa{sub 2}Cu{sub 3}O{sub (7{minus}{delta})} (YBCO). Conventional IC-grade wafers, ultrathin wafers, and micromachined-silicon membrane windows in conventional wafers, are all suitable, but the latter provides considerable advantage for bolometer performance. The high thermal conductivity and strength of silicon make it ideal for submicron-thick window designs. Epitaxy in the HTS film is advantageous, since it reduces granular disorder, the primary cause of dark noise (resistance-fluctuations) in the detector. Mid-to-far-IR transparency of Si at 90 K is unique among those substrates that support high-quality epitaxial YBCO films. This Si transparency to IR can be used for various improvements in the optical design of these devices. The authors review the thermal and optical advantages of silicon substrates, device fabrication issues, and bolometer modeling. Thermal modeling of membrane bolometers indicates that the steady-state temperature-rise profile is nonuniform, but that this does not degrade the response linearity of the bolometer. Certain size limits and trade-offs in the design, will be important in the final device performance. They also discuss applications to FTIR instruments, and extensions of this technology to arrays including a novel on-chip transform spectrometer design.

Fenner, D.B.; Li, Q.; Hamblen, W.D.; Luo, J.; Hamblen, D.G. [AFR, Inc., East Hartford, CT (United States). Superconductivity Group; Budnick, J.I. [Univ. of Connecticut, Storrs, CT (United States). Dept. of Physics

1994-12-31T23:59:59.000Z

209

Mekanisk integration av en IR-detektor i en Stirlingkylare; Mechanical Integration of an IR-detector in a Micro Cooler.  

E-Print Network (OSTI)

?? The master thesis “Mechanical Integration of an IR-detector in a Micro Cooler” has been performed at FLIR Systems AB in Danderyd. FLIR Systems is… (more)

Gibson, Camilla

2008-01-01T23:59:59.000Z

210

Dimensionality-induced insulator-metal crossover in layered nickelates La{sub n+1}Ni{sub n}O{sub 2n+2} (n = 2, 3, and ?)  

SciTech Connect

Low-valence layered nickelates are a structural analog to the superconducting cuprates and possess interesting properties. In this work, we have systematically studied the electronic structure of La{sub n+1}Ni{sub n}O{sub 2n+2} using first-principles calculations. Our results reveal that the Ni-3d 3z{sup 2} ? r{sup 2} orbital state is active and evolves from discrete molecular levels to a continuous solid band and its filling varies as the dimensionality (or n) increases. The two-dimensional (2D) La{sub 3}Ni{sub 2}O{sub 6} and La{sub 4}Ni{sub 3}O{sub 8} are thus found to have a molecular insulating state. In contrast, the 3D LaNiO{sub 2} is metallic and its 3z{sup 2} ? r{sup 2} band surprisingly becomes 3D due to the Ni-La hybridization, and the La-5d xy orbital also forms a 2D metallic band. Therefore, La{sub n+1}Ni{sub n}O{sub 2n+2} is a dimensionality-controlled insulator-metal crossover system.

Liu, Ting; Jia, Ting; Zhang, Xiaoli [Key Laboratory of Materials Physics, Institute of Solid State Physics, Chinese Academy of Sciences, Hefei 230031 (China)] [Key Laboratory of Materials Physics, Institute of Solid State Physics, Chinese Academy of Sciences, Hefei 230031 (China); Wu, Hua, E-mail: wuh@fudan.edu.cn [Laboratory for Computational Physical Sciences (MOE), State Key Laboratory of Surface Physics, and Department of physics, Fudan University, Shanghai 200433 (China)] [Laboratory for Computational Physical Sciences (MOE), State Key Laboratory of Surface Physics, and Department of physics, Fudan University, Shanghai 200433 (China); Zeng, Zhi, E-mail: zzeng@theory.issp.ac.cn [Key Laboratory of Materials Physics, Institute of Solid State Physics, Chinese Academy of Sciences, Hefei 230031 (China) [Key Laboratory of Materials Physics, Institute of Solid State Physics, Chinese Academy of Sciences, Hefei 230031 (China); Hefei National Laboratory for Physical Sciences at Microscale, Department of Physics, University of Science and Technology of China, Hefei 230026 (China); Lin, H. Q. [Beijing Computational Science Research Center, Beijing 100084 (China)] [Beijing Computational Science Research Center, Beijing 100084 (China); Li, X. G. [Hefei National Laboratory for Physical Sciences at Microscale, Department of Physics, University of Science and Technology of China, Hefei 230026 (China)] [Hefei National Laboratory for Physical Sciences at Microscale, Department of Physics, University of Science and Technology of China, Hefei 230026 (China)

2014-04-15T23:59:59.000Z

211

The Disilane Chromophore:? Photoelectron and Electronic Spectra of Hexaalkyldisilanes and 1,(n+2)-Disila[n.n.n]propellanes  

Science Journals Connector (OSTI)

The Disilane Chromophore:? Photoelectron and Electronic Spectra of Hexaalkyldisilanes and 1,(n+2)-Disila[n.n.n]propellanes† ... Related information can be gleaned from results11-15 for the parent disilane, Si2H6. ... 18 A synthesis of an unusual tricyclic disilane with approximately eclipsed Si?C bonds, 1,6-disila[4.4.4]propellane (4, Chart 1), was reported in 1971,19 and the authors noted that its absorption maximum is significantly red-shifted relative to that of 1. ...

Deborah L. Casher; Hayato Tsuji; Atsushi Sano; Martins Katkevics; Akio Toshimitsu; Kohei Tamao; Mari Kubota; Tsunetoshi Kobayashi; C. Henrik Ottosson; Donald E. David; Josef Michl

2003-05-01T23:59:59.000Z

212

Electron-Transfer Collisions of Low-Energy Multicharged Nitrogen-Ions with H-2 and N-2  

E-Print Network (OSTI)

PHYSICAL REVIEW A VOLUME 36, NUMBER 9 NOVEMBER 1, 1987 Electron-transfer collisions of low-energy multicharged nitrogen ions with H2 and N2 Hua-Ying Wang and D. A. Church Department of Physics, Texas A&M University, College Station, Texas 77843... collision provides a direct and valuable test of a recent calculation 36 4261 1987 The American Physical Society 4262 HUA-YING WANG AND P. A. CHURCH 36 by Gargaud and Mccarroll, ' and the other measure- ments provide insight into the electron transfer...

Wang, H. Y.; Church, David A.

1987-01-01T23:59:59.000Z

213

Kinetics of oxygen reduction at IrO{sub 2}-coated titanium electrode in alkaline solution  

SciTech Connect

Oxygen reduction is an industrially important electrochemical reaction, for fuel cells, electrochemical caustic concentrators, air depolarized cathodes, metal-air batteries, and oxidant production. Oxygen reduction at IrO{sub 2}-coated titanium electrodes fabricated by thermal decomposition was investigated by employing cyclic voltammetry and rotating-disk electrode techniques. Cyclic voltammetric results indicated that oxygen reduction begins during the Ir(III)/Ir(IV) transition on an IrO{sub 2} electrode. On the basis of measurements using a rotating disk electrode together with polarization curves, Tafel slopes, and stoichiometric number determinations, a mechanism for oxygen reduction on an IrO{sub 2}-coated titanium electrode is proposed.

Chang, C.C.; Wen, T.C. [National Cheng Kung Univ., Tainan (Taiwan, Province of China). Dept. of Chemical Engineering

1996-05-01T23:59:59.000Z

214

NCEM National Center for Electron Microscopy: Microscopes and Facilities:  

NLE Websites -- All DOE Office Websites (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

215

NCEM National Center for Electron Microscopy: Microscopes and Facilities:  

NLE Websites -- All DOE Office Websites (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

216

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

217

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

218

An Estimate of Biofilm Properties using an Acoustic Microscope  

SciTech Connect

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

219

Measurement of Semiconductor Surface Potential using the Scanning Electron Microscope  

SciTech Connect

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

220

Accretions of Dark Matter and Dark Energy onto ($n+2$)-dimensional Schwarzschild Black Hole and Morris-Thorne Wormhole  

E-Print Network (OSTI)

We have studied accretion of the dark matter and dark energy onto of $(n+2)$-dimensional Schwarzschild black hole and Morris-Thorne wormhole. The mass and the rate of change of mass for $(n+2)$-dimensional Schwarzschild black hole and Morris-Thorne wormhole have been found. We have assumed some candidates of dark energy like holographic dark energy, new agegraphic dark energy, quintessence, tachyon, DBI-essence, etc. The black hole mass and the wormhole mass have been calculated in term of redshift when dark matter and above types of dark energies accrete onto them separately. We have shown that the black hole mass increases and wormhole mass decreases for holographic dark energy, new agegraphic dark energy, quintessence, tachyon accretion and the slope of increasing/decreasing of mass sensitively depends on the dimension. But for DBI-essence accretion, the black hole mass first increases and then decreases and the wormhole mass first decreases and then increases and the slope of increasing/decreasing of mass not sensitively depends on the dimension.

Ujjal Debnath

2015-02-08T23:59:59.000Z

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221

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

222

IR Spectrometer Using 90-degree Off-axis Parabolic Mirrors  

SciTech Connect

A gated spectrometer has been designed for real-time, pulsed infrared (IR) studies at the National Synchrotron Light ource at the Brookhaven National Laboratory. A pair of 90-degree, off-axis parabolic mirrors are used to relay the light from an entrance slit to an output IR recording camera. With an initial wavelength range of 1500–4500 nm required, gratings could not be used in the spectrometer because grating orders would overlap. A magnesium oxide prism, placed between these parabolic mirrors, serves as the dispersion element. The spectrometer is doubly telecentric. With proper choice of the air spacing between the prism and the second parabolic mirror, any spectral region of interest within the InSb camera array’s sensitivity region can be recorded. The wavelengths leaving the second parabolic mirror are collimated, thereby relaxing the camera positioning tolerance. To set up the instrument, two different wavelength (visible) lasers are introduced at the entrance slit and made collinear with the optical axis via flip mirrors. After dispersion by the prism, these two laser beams are directed to tick marks located on the outside housing of the gated IR camera. This provides first-order wavelength calibration for the instrument. Light that is reflected off the front prism face is coupled into a high-speed detector to verify steady radiance during the gated spectral imaging. Alignment features include tick marks on the prism and parabolic mirrors. This instrument was designed to complement singlepoint pyrometry, which provides continuous time histories of a small collection of spots from shock-heated targets.

Robert M. Malone, Richard, G. Hacking, Ian J. McKenna, and Daniel H. Dolan

2008-09-02T23:59:59.000Z

223

Measurements of the reduced force coefficients for H2, N2, CO, and CO2 incident upon a solar panel array material, SiO2-coated Kapton, Kapton, and Z-93-coated Al  

Science Journals Connector (OSTI)

The reduced force coefficients were measured for H2, N2, CO, and CO2 incident upon a solar panel array material, SiO2-coated Kapton, Kapton, and Z-93-coated Al. The coefficients were determined by measuring both the magnitude and direction of the force exerted on the surfaces by molecular beams of the gases. Measurements were made at angles of incidence of 0°, 25°, 50°, 75°, and 85°. The forces were measured using a torsion balance with the surfaces mounted on the end of the lever arm. The absolute flux densities of the molecular beams were measured using a second torsion balance with a beam stop mounted on the lever arm that nullified the force of the scattered molecules. Flux measurements were also made using the effusive method. Standard time-of-flight techniques were used to determine the flux-weighted average velocities of the molecular beams. These velocities ranged from 1670 to 4620 m/s. The overall uncertainty in the reduced force coefficient measurements was estimated to be less than ±10%. These measurements were used to obtain the magnitude and direction of the flux-weighted average velocity of the scattered molecules, and also the flux-weighted translational kinetic energy of the scattered molecules. Analysis of this information provided insight into the microscopic details of the gas-surface interaction potential energy surface.

Steven R. Cook; Mark A. Hoffbauer; David D. Clark; Jon B. Cross

1998-07-01T23:59:59.000Z

224

Relativistic effects in a phosphorescent Ir(III) complex  

Science Journals Connector (OSTI)

We compare high field magnetic circular dichroism, absorption, and photoluminescence spectra for Ir(ptz)3 with time-dependent density functional theory. By gradually turning on the relativistic effects we identify several distinct relativistic effects in the spectra of this complex. We show that relativistic effects must be included to accurately predict the low-temperature spectra. This leads to new insights into the low-lying excitations responsible for the observed phosphorescence, and suggests new avenues to improve the performance of organic light emitting diodes.

A. R. G. Smith; M. J. Riley; S.-C. Lo; P. L. Burn; I. R. Gentle; B. J. Powell

2011-01-21T23:59:59.000Z

225

Plasma polymerization of allylalcohol and propargylalcohol: XPS and IR characterization  

SciTech Connect

Allylalcohol and propargylalcohol, likely to yield oxygen-rich deposits, have been polymerized in a RF plasma. X-ray photoelectron spectroscopy (XPS) and Infrared (IR) have been used to determine the influence of the applied RF power on the deposited films properties. These characterization techniques show that oxygen-rich polymers are obtained at low power or at high power in post-discharge region. For the films formed from allylalcohol (PAA), oxygen is mainly present as alcohol functions (up to 44% at 20 W in post-discharge region). The proportion of alcohol functions is lower for polypropargylalcohol (PPA) while at higher amount of ketones functions is formed in these polymers.

Fally, F.; Virlet, I.; Riga, J.; Verbist, J.J. [Facultes Universitaires Notre-Dame de la Paix (Belgium)

1993-12-31T23:59:59.000Z

226

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

227

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

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

228

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.

229

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

230

IR LASER BASED CHEMICAL SENSOR FOR THE COOPERATIVE MONITORING PROGRAM  

SciTech Connect

The purpose of this project was to investigate the device properties of the quantum cascade laser (QCL), a type of laser invented at Bell Laboratories, Lucent Technologies in the device physics research lab of Dr. Federico Capasso and more specifically to determine the remote sensing capability of this device. The PI and Stevens Institute of Technology collaborated with Dr. Capasso and Bell Laboratories to carry out this research project. The QCL is a unique laser source capable of generating laser radiation in the middle-infrared spectral region that overlaps the most important molecular absorption bands. With appropriate modulation techniques it is possible to use the laser to measure the concentration of many molecules of interest to the remote sensing community. In addition, the mid-IR emission wavelength is well suited to atmospheric transmission as mid-IR experiences much less scattering due to dust and fog. At the onset of this project little was known about several key device performance parameters of this family of lasers and the NNSA supported research enabled them to determine values of several of these characteristics.

Edward A Whitaker

2005-08-08T23:59:59.000Z

231

The discovery of [Ru(NH3)5N2]2+: A case of serendipity and the scientific method  

Science Journals Connector (OSTI)

In this paper the author provides a personal account of the events leading up to the realization [Ru9NH3)5N2]2+ is a real species.

Caesar V. Senoff

1990-01-01T23:59:59.000Z

232

Study on the mechanism of the catalytic conversion of NO x and soot into N2 and CO2 on Fe2O3 in diesel exhaust  

Science Journals Connector (OSTI)

The present study deals with the mechanism of the conversion of NO x and soot into N2 and CO2 on Fe2O3 catalyst. The results of TPO, TRM, DRIFTS and HRTEM examinations suggest a...

H. Bockhorn; S. Kureti; D. Reichert

2007-05-01T23:59:59.000Z

233

Effect of Inoculation with N2-Fixing Spirilla and Azotobacter on Nitrogenase Activity on Roots of Maize Grown Under Subtropical Conditions  

Science Journals Connector (OSTI)

...such as photosynthetic efficiency, trans- VOL. 38...Cairo University, Giza, Egypt, 1967). fixation necessarily...University, Cairo, Egypt. LITERATURE CITED 1...N2-fixing Spirillum in Egypt. Nonsymbiotic Nitrogen...Seminar on Biological Solar Energy Conversion Sys- tems...

N. A. Hegazi; M. Monib; K. Vlassak

1979-10-01T23:59:59.000Z

234

Corrosion mitigation of N-(2-hydroxy-3-trimethyl ammonium)propyl chitosan chloride as inhibitor on mild steel  

Science Journals Connector (OSTI)

Abstract The biopolymer N-(2-hydroxy-3-trimethyl ammonium)propyl chitosan chloride (HTACC) was synthesised and its influence as a novel corrosion inhibitor on mild steel in 1 M \\{HCl\\} was studied using gravimetric and electrochemical experiments. The compound obtained was characterised using FTIR and NMR studies. The inhibition efficiency increased with the increase in concentration and reached a maximum of 98.9% at 500 ppm concentration. Polarisation studies revealed that HTACC acts both as anodic and cathodic inhibitor. Electrochemical impedance studies confirmed that the inhibition is through adsorption on the metal surface. The extent of inhibition exhibits a negative trend with increase in temperature. Langmuir isotherm provides the best description on the adsorption nature of the inhibitor. SEM analysis indicated the presence of protective film formed by the inhibitor on the metal surface.

Y. Sangeetha; S. Meenakshi; C. SairamSundaram

2015-01-01T23:59:59.000Z

235

A thermodynamic model for calculating nitrogen solubility, gas phase composition and density of the N2–H2O–NaCl system  

Science Journals Connector (OSTI)

A thermodynamic model is presented to calculate N2 solubility in pure water (273–590 K and 1–600 bar) and aqueous NaCl solutions (273–400 K, 1–600 bar and 0–6 mol kg?1) with or close to experimental accuracy. This model is based on a semi-empirical equation used to calculate gas phase composition of the H2O–N2 system and a specific particle interaction theory for liquid phase. With the parameters evaluated from N2–H2O–NaCl system and using a simple approach, the model is extended to predict the N2 solubility in seawater accurately. Liquid phase density of N2–H2O–NaCl system at phase equilibrium and the homogenization pressure of fluid inclusions containing N2–H2O–NaCl can be calculated from this model. A computer code is developed for this model and can be downloaded from the website: www.geochem-model.org/programs.htm.

Shide Mao; Zhenhao Duan

2006-01-01T23:59:59.000Z

236

Integrated windows-based control system for an electron microscope  

SciTech Connect

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

237

5 Hz Catalytic Emissions FT-IR Monitoring during Lean-Rich Engine...  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

2005deerlake.pdf More Documents & Publications Reductant Utilization in a LNT + SCR System Spatiotemporal Distribution of NOx Storage: a Factor Controlling NH3 and N2O...

238

Microscopic aspects of the Staebler-Wronski effect  

SciTech Connect

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

239

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

240

Propagation of nonlinearly generated harmonic spin waves in microscopic stripes  

SciTech Connect

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

Note: This page contains sample records for the topic "ir microscope n2" 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

Landau background gauge fixing and the IR properties of Yang-Mills Green functions  

Science Journals Connector (OSTI)

We analyze the complete algebraic structure of the background field method for Yang-Mills theory in the Landau gauge and show several structural simplifications within this approach. In particular, we present a new way to study the IR behavior of Green functions in the Landau gauge and show that there exists a unique Green function whose IR behavior controls the IR properties of the gluon and the ghost propagators.

Pietro A. Grassi; Tobias Hurth; Andrea Quadri

2004-11-16T23:59:59.000Z

242

SESAM FT-IR: A Comparison of the R&D Workhorse to Standard Emission...  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

Workhorse to Standard Emission Benches Data for a number of regulated emissions and ethanol using the SESAM FT-IR compare favorably with standard emissions analyzers....

243

SESAM FT-IR: A Comparison of the R&D Workhorse to Standard Emission Benches  

Energy.gov (U.S. Department of Energy (DOE))

Data for a number of regulated emissions and ethanol using the SESAM FT-IR compare favorably with standard emissions analyzers.

244

Highly Active and Stable MgAl2O4 Supported Rh and Ir Catalysts...  

NLE Websites -- All DOE Office Websites (Extended Search)

Supported Rh and Ir Catalysts for Methane Steam Reforming: A Combined Experimental and Abstract: In this work we present a combined experimental and theoretical investigation of...

245

High Power Operation of the JLab IR FEL Driver Accelerator  

SciTech Connect

Operation of the JLab IR Upgrade FEL at CW powers in excess of 10 kW requires sustained production of high electron beam powers by the driver ERL. This in turn demands attention to numerous issues and effects, including: cathode lifetime; control of beamline and RF system vacuum during high current operation; longitudinal space charge; longitudinal and transverse matching of irregular/large volume phase space distributions; halo management; management of remnant dispersive effects; resistive wall, wake-field, and RF heating of beam vacuum chambers; the beam break up instability; the impact of coherent synchrotron radiation (both on beam quality and the performance of laser optics); magnetic component stability and reproducibility; and RF stability and reproducibility. We discuss our experience with these issues and describe the modus vivendi that has evolved during prolonged high current, high power beam and laser operation.

Kevin Beard; Stephen Benson; George Biallas; James Boyce; Donald Bullard; James Coleman; David Douglas; H. Dylla; Richard Evans; Pavel Evtushenko; Christopher Gould; Albert Grippo; Joseph Gubeli; David Hardy; Carlos Hernandez-Garcia; J. Hovater; Kevin Jordan; John Klopf; Rui Li; Steven Moore; George Neil; Benard Poelker; Thomas Powers; Joseph Preble; Robert Rimmer; Daniel Sexton; Michelle D. Shinn; Christopher Tennant; Richard Walker; Gwyn Williams; Shukui Zhang

2007-08-01T23:59:59.000Z

246

Calibrated nanoscale dopant profiling using a scanning microwave microscope  

SciTech Connect

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

247

Physical properties of selected block Argonne Premium bituminous coal related to CO2, CH4, and N2 adsorption  

Science Journals Connector (OSTI)

CO2, CH4, and N2 adsorption and gas-induced swelling were quantified for block Blind Canyon, Pittsburgh #8 and Pocahontas Argonne Premium coals that were dried and structurally relaxed at 75 °C in vacuum. Strain measurements were made perpendicular and parallel to the bedding plane on ~ 7 × 7 × 7 mm3 coal blocks and gravimetric sorption measurements were obtained simultaneously on companion coal blocks exposed to the same gaseous environment. The adsorption amount and strain were determined after equilibration at P  ? 1.8 MPa. There is a strong non-linear correlation between strain and the quantity of gas adsorbed and the results for all gases and coals studied follow a common pattern. The dependence of the coal matrix shrinkage/swelling coefficient (Cgc) on the type and quantity of gas adsorbed is seen by plotting the ratio between the strain and the adsorbate concentration against the adsorbate concentration. In general, Cgc increases with increasing adsorbate concentration over the range of ~ 0.1 to 1.4 mmol/g. Results from the dried block coals are compared to CO2 experiments using native coals with an inherent level of moisture as received. The amount of CO2 adsorbed using native coals (assuming no displacement of H2O by CO2) is significantly less than the dried coals. The gas-induced strain (S) and adsorption amount (M) were measured as a function of time following step changes in CO2, CH4, and N2 pressure from vacuum to 1.8 MPa. An empirical diffusion equation was applied to the kinetic data to obtain the exponent (n) for time dependence for each experiment. The data for all coals were pooled and the exponent (n) evaluated using an ANOVA statistical analysis method. Values for (n) near 0.5 were found to be independent on the coal, the gas or type of measurement (e.g., parallel strain, perpendicular strain, and gas uptake). These data support the use of a Fickian diffusion model framework for kinetic analysis. The kinetic constant k was determined using a unipore diffusion model for each experiment and the data were pooled for ANOVA analysis. For dry coal, statistically significant differences for k were found for the gases (CO2 > N2 > CH4) and coals (Pocahontas >Blind Canyon > Pittsburgh #8) but not for the method of the kinetic measurement (e.g., strain or gas uptake). For Blind Canyon and Pittsburgh #8 coal, the rate of CO2 adsorption and gas-induced strain for dry coal was significantly greater than that of the corresponding native coal. For Pocahontas coal the rates of CO2 adsorption and gas-induced strain for dry and native coal were indistinguishable and may be related to its low native moisture and minimal amount of created porosity upon drying.

S.R. Kelemen; L.M. Kwiatek

2009-01-01T23:59:59.000Z

248

Optical emission studies of nitrogen plasma generated by IR CO2 laser pulses  

Science Journals Connector (OSTI)

Large-scale plasma produced in nitrogen gas at room temperature and pressures ranging from 4 ? 103 to 1.2 ? 105 Pa by high-power laser-induced dielectric breakdown (LIDB) has been investigated. Time-integrated optical nitrogen gas spectra excited from a CO2 laser have been measured and analysed. The spectrum of the generated plasma is dominated by the emission of strong N+ and N and very weak N2+ atomic lines and molecular features of N+2(B2?+u–X2?+g), N+2(D2?g–A2?u), N2(C3?u–B3?g) and very weak N2(B3?g–A3?+u). The relative intensities of the 0–0 band heads in the N2(C–B) and N+2(B–X) systems are very weak as compared with the chemiluminescence spectrum of nitrogen formed in a glow discharge. An excitation temperature Texc = 21?000 ± 1300 K was calculated by means of the relative intensity of ionized nitrogen atomic lines assuming local thermodynamic equilibrium. Optical breakdown threshold intensities in N2 at 9.621 µm have been determined. The physical processes leading to the LIDB of nitrogen in the power density range 0.4 J ?2 have been analysed. From our experimental observations we can suggest that, although the first electrons must appear via multiphoton ionization or natural ionization, electron cascade is the main mechanism responsible for the LIDB in nitrogen.

J J Camacho; J M L Poyato; L Díaz; M Santos

2007-01-01T23:59:59.000Z

249

Rigid Holography and Six-Dimensional N=(2,0) Theories on AdS_5 times S^1  

E-Print Network (OSTI)

Field theories on anti-de Sitter (AdS) space can be studied by realizing them as low-energy limits of AdS vacua of string/M theory. In an appropriate limit, the field theories decouple from the rest of string/M theory. Since these vacua are dual to conformal field theories (CFTs), this relates some of the observables of these field theories on AdS to a subsector of the dual CFTs. We exemplify this `rigid holography' by studying in detail the 6d N=(2,0) A_{K-1} superconformal field theory (SCFT) on AdS_5xS^1, with equal radii for AdS_5 and for S^1. We choose specific boundary conditions preserving sixteen supercharges that arise when this theory is embedded into Type IIB string theory on AdS_5xS^5/Z_K. On R^{4,1}xS^1, this 6d theory has a 5(K-1)-dimensional moduli space, with unbroken 5d SU(K) gauge symmetry at (and only at) the origin. On AdS_5xS^1, the theory has a 2(K-1)-dimensional `moduli space' of supersymmetric configurations. We argue that in this case the SU(K) gauge symmetry is unbroken everywhere in...

Aharony, Ofer; Rey, Soo-Jong

2015-01-01T23:59:59.000Z

250

Transformation pathways in high-pressure solid nitrogen: from molecular N$_2$ to polymeric cg-N  

E-Print Network (OSTI)

The transition pathway in high-pressure solid nitrogen from N$_2$ molecular state to polymeric cg-N phase was investigated by means of \\textit{ab initio} molecular dynamics and metadynamics simulations. In our study, we observed a transformation mechanism from molecular $Immm$ phase initiated by formation of $trans$-$cis$ chains. These chains further connected within layers and formed a chain-planar state, which we describe as a mixture of crystalline $trans$-$cis$ chain phase and $planar$ phase (both with $Pnma$ symmetry). This form appeared in molecular dynamics performed at 120 GPa and 1500 K and also in metadynamics run at 110 GPa and 1500 K, in which the chains continued to reorganize further and finally formed cg-N. During various other metadynamics runs, two different phases emerged - molecular $P2_1/c$ and two-three-coordinated chain-like $Cm$. The transformation mechanism leading to cg-N may be characterized as a progressive polymerization process passing throughout several intermediate states of var...

Plašienka, Dusan

2014-01-01T23:59:59.000Z

251

Influence of operating conditions and coal properties on \\{NOx\\} and N2O emissions in pressurized fluidized bed combustion of subbituminous coals  

Science Journals Connector (OSTI)

This experimental study is aimed at finding effects of operating conditions in PFBC on nitrogen oxide emissions for subbituminous coals differing in ash content/composition, combustion/gasification reactivities and in particle size distribution. The experiments have been done on a smaller laboratory apparatus with ID=8 cm. The effects of operating pressure (0.1–1 MPa), temperature of the fluidized bed (800–900 °C), freeboard temperature and oxygen concentration (3–10 vol.%) on the nitrogen oxides emissions are relatively complex, coupled with temperature of burning coal particles. The coal ash content/composition (esp. CaO and Fe2O3) and fly ash freeboard concentration play an important role in formation/destruction chemistry of both NO and N2O. The \\{NOx\\} emissions decrease with increasing operating pressure at the same volumetric oxygen concentration and temperature. Temperature, volatile content, reactivities of coals and ash composition are the most important factors for N2O emissions. The N2O emissions are either almost constant or can exhibit a maximum at increasing operating pressure. Influence of increasing oxygen concentration on \\{NOx\\} and N2O emissions is more pronounced at lower operating pressures, esp. for the less reactive, medium ash coal. The particle size distribution of the coal (influence of coal dust) can cause characteristic changes in \\{NOx\\} and N2O emissions in PFBC, esp. at lower combustion temperatures (800–840 °C). The emission changes are dependent on ash properties/composition.

Karel Svoboda; Michael Poho?elý

2004-01-01T23:59:59.000Z

252

European Journal of Soil Science, December 2010, 61, 903913 doi: 10.1111/j.1365-2389.2009.01217.x Towards an agronomic assessment of N2O emissions  

E-Print Network (OSTI)

Towards an agronomic assessment of N2O emissions: a case study for arable crops J . W . V a n G r o e n i. Commonly, N2O emissions are expressed as a function of N application rate. This suggests that smaller fertilizer applications always lead to smaller N2O emissions. Here we argue that, because of global demand

van Kessel, Chris

253

Two Semi-Empirical Methods for Determination of Shafranov Shift in IR-T1 Tokamak  

Science Journals Connector (OSTI)

In this paper we present two semi-empirical methods for determination of Shafranov shift in IR-T1 tokamak. In the first method, solution of ... on the outer surface of the IR-T1 tokamak chamber and then Shafranov...

A. Salar Elahi; M. Ghoranneviss; A. Rahimi Rad

2009-12-01T23:59:59.000Z

254

Rational production of veneer by IR-heating of green wood during peeling: Modeling experiments  

E-Print Network (OSTI)

-line IR heating system installed on the peeling lathe. Keywords: green wood; heating; infrared; modeling solutions are sought for. Experiments with electric ohmic and microwave heating methods (TorgovnikovRational production of veneer by IR-heating of green wood during peeling: Modeling experiments Anna

Paris-Sud XI, Université de

255

January 31, 2014 EITC Awareness Day: IRS Kicks-Off Tax Season Alerting  

E-Print Network (OSTI)

-Income Workers of Significant Tax Benefit IRS YouTube Video: Earned Income Tax Credit: English | Spanish in launching the Earned Income Tax Credit Awareness Day outreach campaign to ensure that millions of low from the IRS even if they owe no tax. Get the Credit: How to Claim the EITC #12;To get the EITC

Behmer, Spencer T.

256

IRS Parking Facility Lighting Retrofit Reduces Annual Energy Use by 76%  

Energy.gov (U.S. Department of Energy (DOE))

Document provides an overview of how the IRS and MC Realty Group, its property management firm, achieved a 76% reduction in lighting energy use at an IRS facility parking garage in Kansas City, Missouri. The retrofit resulted in annual energy savings of 2 million kWh, annual cost savings of over $122,000, and a simple payback of 2.5 years.

257

ON THE INTEGRATION OF IR AND Arjen P. de Vries and Annita N. Wilschut  

E-Print Network (OSTI)

ON THE INTEGRATION OF IR AND DATABASES Arjen P. de Vries and Annita N. Wilschut Centre,annita}@cs.utwente.nl Abstract: Integration of information retrieval (IR) in database management systems (DBMSs) has proven difficult. Previous attempts to integration suffered from inherent performance problems, or lacked desirable

de Vries, Arjen P.

258

Total Hydrogenation of Furfural and 5-Hydroxymethylfurfural over Supported Pd–Ir Alloy Catalyst  

Science Journals Connector (OSTI)

Total Hydrogenation of Furfural and 5-Hydroxymethylfurfural over Supported Pd–Ir Alloy Catalyst ... Total hydrogenation of 5-hydroxymethylfurfural was also possible using Pd–Ir/SiO2 catalyst. ... (8-11) Furfural and 5-hydroxymethylfurfural (HMF) are produced from sugars via dehydration and are promising intermediates in biorefinery. ...

Yoshinao Nakagawa; Kana Takada; Masazumi Tamura; Keiichi Tomishige

2014-07-09T23:59:59.000Z

259

NCEM National Center for Electron Microscopy: Microscopes and Facilities:  

NLE Websites -- All DOE Office Websites (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 1Ă… 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

260

In situ laser processing in a scanning electron microscope  

SciTech Connect

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

Note: This page contains sample records for the topic "ir microscope n2" 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

In situ laser processing in a scanning electron microscope  

SciTech Connect

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

262

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

263

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

264

Microscopic return point memory in Co/Pd multilayer films  

SciTech Connect

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

265

Microscopic modulation of mechanical properties in transparent insect wings  

SciTech Connect

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

266

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

267

Dynamics of a nanodroplet under a transmission electron microscope  

SciTech Connect

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

268

Low Dose Radiation Research Program: Comparisons of IR and ROS for  

NLE Websites -- All DOE Office Websites (Extended Search)

Comparisons of IR and ROS for Induction of Damage to Cells Comparisons of IR and ROS for Induction of Damage to Cells Kathryn D. Held1, Yvonne L. McCarey1, Laurence Tartier1, Elena V. Rusyn1, Giuseppe Schettino2, Melvyn Folkard2, Kevin M. Prise2, and Barry D. Michael2 1Department of Radiation Oncology, Massachusetts General Hospital/Harvard Medical School, Boston, MA 02114; 2Gray Laboratory Cancer Research Trust, Mount Vernon Hospital, Northwood, HA6 2JR, UK Accurate evaluation of the risks associated with exposure to low doses of ionizing radiation (IR) is a major challenge for environmental sciences. Studies on the mechanisms of the actions of low doses of IR are needed to help understand possible risks. IR exerts its effects on cells through production of reactive oxidizing species (ROS) such as ·OH, H2O2 and

269

Analysis of insulation characteristics of c-C4F8 and N2 gas mixtures by the Monte Carlo method  

Science Journals Connector (OSTI)

The motion of electrons in c-C4F8 and N2 gas mixtures for a pulsed Townsend discharge is simulated by the Monte Carlo method. The effective ionization coefficient, , over the E/N range from 160 to 480?Td is calculated by employing a set of cross sections available in the literature. From the variation curve of with the C4F8 mixture ratio k, the limiting field of the gas mixture at different gas content is determined. The required gas pressure ratios comparable with the insulation property of SF6 and GWP at this gas pressure were also investigated. It is found that the insulation characteristics of the N2 and c-C4F8 gas mixtures are comparable with the N2 and SF6 mixture, but the GWP of the former is significantly lower than that of the latter. Simulation results show excellent agreement with experimental data available in the literature.

Bian-Tao Wu; Deng-Ming Xiao; Zhang-Sheng Liu; Liu-Chun Zhang; Xue-Li Liu

2006-01-01T23:59:59.000Z

270

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

271

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

NLE Websites -- All DOE Office Websites (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...

272

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

273

A common intermediate for N2 formation in enzymes and zeolites: side-on Cu-nitrosyl complexes  

SciTech Connect

Understanding the mechanisms of catalytic processes requires the identification of reaction centers and key intermediates, both of which are often achieved by the use of spectroscopic characterization tools. Due to the heterogeneity of active centers in heterogeneous catalysts, it is frequently difficult to identify the specific sites that are responsible for the overall activity. Furthermore, the simultaneous presence of a large number of surface species on the catalyst surface often poses a great challenge for the unambiguous determination of the relevant species in the reaction mechanism. In contrast, enzymes possess catalytically active centers with precisely defined coordination environments that are only able to accommodate intermediates relevant to the specific catalytic process. Here we show that side-on Cu+-NO+ complexes characterized by high magnetic field solid state magic angle spinning nuclear magnetic resonance (NMR) and Fourier transform infrared (FTIR) spectroscopies are the key intermediates in the selective catalytic reduction of NO over Cu-SSZ-13 zeolite catalysts. Analogous intermediates have been observed and characterized in nitrite reductase enzymes, and shown to be the critical intermediates in the formation of N2 for anaerobic ammonium oxidation reactions.[1] The identification of this key reaction intermediate, combined with the results of our prior kinetic studies, allows us to propose a new reaction mechanism for the selective catalytic reduction of NO with NH3 under oxygen-rich environments over Cu-SSZ-13 zeolites, a key reaction in automotive emission control. The authors acknowledge the US Department of Energy (DOE), Office of Energy Efficiency and Renewable Energy/Vehicle Technologies Program for the support of this work. The research described in this paper was performed at the Environmental Molecular Sciences Laboratory (EMSL), a national scientific user facility sponsored by the DOE’s Office of Biological and Environmental Research and located at Pacific Northwest National Laboratory (PNNL). PNNL is operated for the US DOE by Battelle Memorial Institute.

Kwak, Ja Hun; Lee, Jong H.; Burton, Sarah D.; Lipton, Andrew S.; Peden, Charles HF; Szanyi, Janos

2013-09-16T23:59:59.000Z

274

Cluster size effects on sintering, CO adsorption, and implantation in Ir/SiO{sub 2}  

SciTech Connect

A series of planar model catalysts have been prepared via deposition of Ir{sub n}{sup +} on thermally grown amorphous SiO{sub 2}/Si(100) and ion scattering spectroscopy was used to probe surface structure as a function of cluster size, impact energy, and surface temperature. Deposition of Ir{sub 2} or Ir{sub 10} at low energies and room temperature results in stable clusters forming one- or two-dimensional single layer islands on the oxide surface. Heating the samples to 750 K leads to agglomeration, forming multilayer structures on the surface. Ir{sub 1} deposited under similar conditions sinters into large clusters at room temperature. Deposition at 110 K at least partially stabilizes the Ir atoms with respect to diffusion and sintering. At higher deposition energies, partial implantation into the surface is observed, but this appears to be insufficient to stabilize the clusters against sintering at elevated temperature. At low temperatures, substrate-mediated adsorption of CO is found to be highly efficient, leading to near saturation coverages of CO bound atop the Ir{sub n} clusters. The CO can be removed by careful He{sup +} sputtering. The deposition/binding behavior of Ir{sub n} on SiO{sub 2} is quite different from Ir{sub n}/TiO{sub 2}(110), for which the clusters bind in three-dimensional morphology, starting at Ir{sub 5}. That system also shows substrate-mediated adsorption of CO, but the CO preferentially binds at the periphery of the clusters rather than on top.

Kaden, W. E.; Kunkel, W. A.; Anderson, Scott L. [Department of Chemistry, University of Utah, 315 S. 1400 E. RM 2020, Salt Lake City, Utah 84112-0850 (United States)

2009-09-21T23:59:59.000Z

275

Usage of FTIR for Detection of Isotopicaly Labeled N2O Emitted from Soil D. Harush, A. Shaviv, R. Linker and Y. Dubowski*  

E-Print Network (OSTI)

the emissions of water soluble or gaseous pollutants. Nitrous oxide (N2O), a well-known greenhouse gas. Linker and Y. Dubowski* Faculty of Civil and Environmental Engineering, Technion, Haifa, Israel Nitrogen, is an intermediate nitrogen species of the denitrification process and a by-product of nitrification. The various

Simon, Emmanuel

276

Potentials of Silver and Gold Electrodes of ZrO2-Based Cells in N2+ O2+ CO2+ CO Gas Mixtures  

Science Journals Connector (OSTI)

Steady-state electrode potentials in cells with a ZrO2+ 10 mol % Y2O3electrolyte are measured at 400 to 500°C in nonequilibrium N2+ O2+ CO2+ CO gas mixtures containing 0–3 and 0–10 vol % of CO and O2, respectivel...

G. I. Fadeev; I. D. Remez

2001-05-01T23:59:59.000Z

277

---Home Yahoo! Help My Yahoo! http://asia.news.yahoo.com/041201/kyodo/d86n2bdg0.html  

E-Print Network (OSTI)

- - -Home Yahoo! Help My Yahoo! http://asia.news.yahoo.com/041201/kyodo/d86n2bdg0.html Thursday Reserved. - - -Privacy Policy Terms of Service Community Help 12/1/04 8:49 PMFrance confident of U.S., S

278

Supersaturated N2O in a perennially ice-covered Antarctic lake: Molecular and stable isotopic evidence for a biogeochemical relict  

E-Print Network (OSTI)

Supersaturated N2O in a perennially ice-covered Antarctic lake: Molecular and stable isotopic Abstract The east lobe of Lake Bonney, a permanently ice-covered lake in the McMurdo Dry Valleys2O was produced via incomplete nitrification and has undergone virtually no subsequent consumption

Priscu, John C.

279

Optical Nonlinearity in Ar and N2 near the Ionization Threshold J. K. Wahlstrand, Y.-H. Cheng, Y.-H. Chen, and H. M. Milchberg  

E-Print Network (OSTI)

Optical Nonlinearity in Ar and N2 near the Ionization Threshold J. K. Wahlstrand, Y.-H. Cheng, Y measure the nonlinear optical response in argon and nitrogen in a thin gas target to laser intensities.103901 PACS numbers: 42.65.An, 42.65.Jx, 42.65.Re The optical Kerr effect, the intensity-dependent refrac

Milchberg, Howard

280

PAH chemistry and IR emission from circumstellar disks  

E-Print Network (OSTI)

Aims. The chemistry of, and infrared (IR) emission from, polycyclic aromatic hydrocarbons (PAHs) in disks around Herbig Ae/Be and T Tauri stars are investigated. The equilibrium distribution of the PAHs over all accessible charge/hydrogenation states depends on the size and shape of the PAHs and on the physical properties of the star and surrounding disk. Methods. A chemistry model is created to calculate this equilibrium distribution. Destruction of PAHs by ultraviolet (UV) photons, possibly in multi-photon absorption events, is taken into account. The chemistry model is coupled to a radiative transfer code to provide the physical parameters and to combine the PAH emission with the spectral energy distribution (SED) from the star+disk system. Results. Normally hydrogenated PAHs in Herbig Ae/Be disks account for most of the observed PAH emission, with neutral and positively ionized species contributing in roughly equal amounts. Close to the midplane, the PAHs are more strongly hydrogenated and negatively ionized, but these species do not contribute to the overall emission because of the low UV/optical flux deep inside the disk. PAHs of 50 carbon atoms are destroyed out to 100 AU in the disk's surface layer, and the resulting spatial extent of the emission does not agree well with observations. Rather, PAHs of about 100 carbon atoms or more are predicted to cause most of the observed emission. The emission is extended on a scale similar to that of the size of the disk. Furthermore, the emission from T Tauri disks is much weaker and concentrated more towards the central star than that from Herbig Ae/Be disks. Positively ionized PAHs are predicted to be largely absent in T Tauri disks because of the weaker radiation field.

R. Visser; V. C. Geers; C. P. Dullemond; J. -C. Augereau; K. M. Pontoppidan; E. F. van Dishoeck

2007-01-22T23:59:59.000Z

Note: This page contains sample records for the topic "ir microscope n2" 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

COUNTRY INSTITUTION DATE WEB ADDRESS IRAN University of Art Isfahn 08.03.2007 http://www.aui.ac.ir  

E-Print Network (OSTI)

COUNTRY INSTITUTION DATE WEB ADDRESS IRAN University of Art Isfahn 08.03.2007 http://www.aui.ac.ir IRAN Isfahn University of Technology 08.03.2007 http://www.iut.ac.ir IRAN The University of Isfahn 15/03/2011 http://www.ui.ac.ir IRAN Shahid Bahonar University of Kermn 06.06.2005 http

Di Pillo, Gianni

282

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

283

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

284

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

285

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

286

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.

287

Towards a Microscopic Reaction Description Based on Energy Density Functionals  

SciTech Connect

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

288

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

289

Performance of actinic EUVL mask imaging using a zoneplate microscope  

SciTech Connect

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

290

Microscopic mechanisms of graphene electrolytic delamination from metal substrates  

SciTech Connect

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

291

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

292

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

293

Temperature-jump 2D IR spectroscopy to study protein conformational dynamics  

E-Print Network (OSTI)

Temperature-jump (T-jump) two-dimensional infrared spectroscopy (2D IR) is developed, characterized, and applied to the study of protein folding and association. In solution, protein conformational changes span a wide range ...

Jones, Kevin C. (Kevin Chapman)

2012-01-01T23:59:59.000Z

294

Effects of Resonant Helical Field on Plasma Internal Inductance in IR-T1 Tokamak  

Science Journals Connector (OSTI)

Measurement of plasma internal inductance is important in tokamak plasma experiments (plasma internal inductance relates to ... on the plasma internal inductance in IR-T1 tokamak. For this purpose, four magnetic ...

A. Salar Elahi; M. Ghoranneviss

2009-12-01T23:59:59.000Z

295

Plasma Magnetic Fluctuations Measurement on the Outer Surface of IR-T1 Tokamak  

Science Journals Connector (OSTI)

In this paper we present an experimental investigation of effects of external rotating helical field (RHF) on magnetic field fluctuations around the IR-T1 tokamak chamber. For this purpose, two magnetic ... on th...

A. Salar Elahi; M. Ghoranneviss

2010-02-01T23:59:59.000Z

296

Near-IR Solar Coronal Observations with New-Technology Reflecting Coronographs  

Science Journals Connector (OSTI)

Emission-line and K-coronal observations in the IR have the significant advantage of reduced sky brightness compared with the visible, while the effects of seeing are also reduced. Moreover, strong lines are a...

Raymond N. Smartt; Serge Koutchmy; Jacques-Clair Noëns

1994-01-01T23:59:59.000Z

297

B&W IR-CFB: Operating Experience and New Developments  

Science Journals Connector (OSTI)

The paper provides an update on B&W Internal Recirculation (IR) CFB boiler operating experience, new commercial projects, ... of in-furnace heat absorption in higher capacity CFB boilers, a new B&W development is...

M. Maryamchik; D. L. Wietzke

2010-01-01T23:59:59.000Z

298

Interlayer proton transfer in brucite under pressure by polarized IR spectroscopy to 5.3?GPa  

Science Journals Connector (OSTI)

In order to investigate the behaviour of proton in brucite under pressure, polarized IR absorption spectra and ... ) and (110) oriented single crystal of brucite under high pressure were measured by Fourier...?1....

Keiji Shinoda; Nobuyuki Aikawa

1998-02-01T23:59:59.000Z

299

Inexpensive Near-IR Sun Photometer for Measuring Total Column Water Vapor  

Science Journals Connector (OSTI)

An inexpensive two-channel near-IR sun photometer for measuring total atmospheric column water vapor (precipitable water) has been developed for use by the Global Learning and Observations to Benefit the Environment (GLOBE) environmental science ...

David R. Brooks; Forrest M. Mims III; Richard Roettger

2007-07-01T23:59:59.000Z

300

Spectral Broadening of Femtosecond Mid-IR Pulses Coupled Into Quantum Cascade Lasers  

Science Journals Connector (OSTI)

Femtosecond 4.72 ?m Mid-IR pulses are coupled into a pulsed biased, room temperature 4.72 ?m QCL, resulting in 2X spectra broadening of the input pulses.

Liu, Sheng; Cai, Hong; Lalanne, Elaine; Liu, Peter Q; Cheng, Xiaojun; Gmachl, Claire; Johnson, Anthony M

Note: This page contains sample records for the topic "ir microscope n2" 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

Design and Fabrication of Efficient Collimation and Focusing Optics for Mid-IR Quantum Cascade Lasers  

SciTech Connect

In this paper, we report the design, fabrication, and characterization of germanium aspheric collimating and focusing optics designed for mid-IR QCLs having an emission wavelength of 8.77 microns.

Bernacki, Bruce E.; Krishnaswami, Kannan; Anheier, Norman C.; Cannon, Bret D.

2008-03-01T23:59:59.000Z

302

FT-IR spectroscopy technology, market evolution and future strategies of Bruker Optics Inc.  

E-Print Network (OSTI)

This thesis explores the technology and market evolution of FT-IR spectroscopy over its nearly forty year history to aid in determining future product design and marketing strategies for an industry-leading firm, Bruker ...

Higdon, Thomas (Thomas Charles)

2010-01-01T23:59:59.000Z

303

Hydrogen Bond Rearrangements in Water Probed with Temperature-Dependent 2D IR  

E-Print Network (OSTI)

We use temperature-dependent two-dimensional infrared spectroscopy (2D IR) of dilute HOD in H2O to investigate hydrogen bond rearrangements in water. The OD stretching frequency is sensitive to its environment, and loss ...

Nicodemus, Rebecca A.

304

BNL-73700-2005-IR ELECTRON BEAM ION SOURCE PRE-INJECTOR PROJECT  

E-Print Network (OSTI)

BNL-73700-2005-IR ELECTRON BEAM ION SOURCE PRE-INJECTOR PROJECT (EBIS) CONCEPTUAL DESIGN REPORT J.2. THE EBIS SOURCE .........................................................................................14 4.2. DEMONSTRATION OF HIGH CURRENT ELECTRON BEAM FORMATION AND PROPAGATION

305

Electrostatic interactions in phospholipid membranes revealed by coherent 2D IR spectroscopy  

E-Print Network (OSTI)

organelle in a cell, the membrane sets the information and energy gradients necessary for life. Car- bonyl of the carbonyl absorption can be attributed to electric field fluctuations. 2D IR techniques are femtosecond

Mukamel, Shaul

306

Temperature dependence of IR absorption spectra of water in aromatic hydrocarbons  

Science Journals Connector (OSTI)

The influence of the temperature of a medium on the IR absorption spectra of water dissolved in aromatic hydrocarbons was studied. It was found that the ... of the determination of the quantity of dissolved water

Sh. I. Seidov; L. I. Prokhvatilova

2008-07-01T23:59:59.000Z

307

Compact IR Quadrupoles for Linear Colliders Based on Rutherford-type Cable  

SciTech Connect

The upcoming and disrupted beams in the interaction region (IR) of a linear collider are focused by doublets consisting of two small-aperture superconducting quadrupoles. These magnets need an effective compact magnetic shielding to minimize magnetic coupling between the two channels and sufficient temperature margin to withstand radiation-induced heat depositions in the coil. This paper presents conceptual designs of IR quadrupoles for linear colliders based on NbTi and Nb{sub 3}Sn Rutherford-type cables.

Lopes, M.L.; Kashikhin, V.S.; Kashikhin, V.V.; Zlobin, A.V.; /Fermilab

2008-08-01T23:59:59.000Z

308

HCl Oxidation on IrO2-Based Catalysts: From Fundamentals to Scale-Up  

Science Journals Connector (OSTI)

HCl Oxidation on IrO2-Based Catalysts: From Fundamentals to Scale-Up ... (ii) Geometric and electronic effects of TiO2-rutile are predicted not to lead to improved HCl oxidation activity for 1 and 2 epilayers of IrO2 over the carrier. ... From a fundamental viewpoint, it would be interesting to assess whether rutile-type oxides exhibit similar Deacon chemistry. ...

Maximilian Moser; Cecilia Mondelli; Amol P. Amrute; Atsushi Tazawa; Detre Teschner; Manfred E. Schuster; Achim Klein-Hoffman; Núria López; Timm Schmidt; Javier Pérez-Ramírez

2013-10-17T23:59:59.000Z

309

MIAMI: Microscope and ion accelerator for materials investigations  

SciTech Connect

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

310

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

311

High PEMFC performance by applying Ir-V nanoparticles as a cathode catalyst  

Science Journals Connector (OSTI)

Very active catalysts Ir-V/C, as a novel suitable cathode catalyst in \\{PEMFCs\\} was synthesized using IrCl3 and NH4VO3 as the Ir and V precursors. By applying the ethylene glycol (EG) method, a well dispersion of Ir-V/C catalysts with mean particle size of 2 nm was obtained. The membrane–electrode assembly (MEA) fabricated with Ir-V nanoparticles exhibited the excellent catalytic activity toward the oxygen reduction reaction (ORR) and, reached 517 mW cm?2 at 0.43 V and 210 mW cm?2 at 0.30 V in a real fuel cell environment, H2/O2 and H2/air, respectively. In particular, promising results were obtained based on a low metal (Ir) loading of 0.4 mg cm?2 on the cathode which achieved 100 h durability at a constant current density of 1200 mA cm?2. The electrocatalytic effect related to a change in the electro-catalyst structure was discussed based on the XRD and TEM data. Also, for the first time, the electrochemical impedance spectra (EIS) and cyclic voltammetry (CV) techniques were used to assess the kinetics of oxygen reduction on the produced samples and the enhancement effect of V in-situ of fuel cells.

Jinli Qiao; Bing Li; Daijun Yang; Jianxin Ma

2009-01-01T23:59:59.000Z

312

Nanostructured F doped IrO2 electro-catalyst powders for PEM based water electrolysis  

Science Journals Connector (OSTI)

Abstract Fluorine doped iridium oxide (IrO2:F) powders with varying F content ranging from 0 to 20 wt.% has been synthesized by using a modification of the Adams fusion method. The precursors (IrCl4 and NH4F) are mixed with NaNO3 and heated to elevated temperatures to form high surface area nanomaterials as electro-catalysts for PEM based water electrolysis. The catalysts were then coated on a porous Ti substrate and have been studied for the oxygen evolution reaction in PEM based water electrolysis. The IrO2:F with an optimum composition of IrO2:10 wt.% F shows remarkably superior electrochemical activity and chemical stability compared to pure IrO2. The results have also been supported via kinetic studies by conducting rotating disk electrode (RDE) experiments. The RDE studies confirm that the electro-catalysts follow the two electron transfer reaction for electrolysis with calculated activation energy of ?25 kJ mol?1. Single full cell tests conducted also validate the superior electrochemical activity of the 10 wt.% F doped IrO2.

Karan Sandeep Kadakia; Prashanth H. Jampani; Oleg I. Velikokhatnyi; Moni Kanchan Datta; Sung Kyoo Park; Dae Ho Hong; Sung Jae Chung; Prashant N. Kumta

2014-01-01T23:59:59.000Z

313

Attenuated degradation of a PEMFC cathode during fuel starvation by using carbon-supported IrO2  

Science Journals Connector (OSTI)

IrO2, a water electrolysis catalyst, has been known to be effective in preventing corrosion of the carbon support in proton exchange membrane fuel cells (PEMFCs). Particulate IrO2 can agglomerate easily, which can decrease substantially the catalytic surface area required for oxygen evolution reaction, causing the loss of catalytic efficiency. Furthermore, agglomerated IrO2 nanoparticles can have an adverse effect on the oxygen reduction reaction by covering the active surface area of the Pt/C cathode catalyst, which is a damaging factor for the intrinsic performance of PEMFC. Carbon-supported iridium oxide, IrO2/C, which can prevent the agglomeration of Ir nanoparticles more effectively, was synthesized to overcome these problems. Compared to the cell with the Pt/C cathode only, the cell with 10 wt.% IrO2 particles and Pt/C cathode showed stronger durability during fuel starvation but the cell performance at normal operation decreased severely by 35%. The cell with the same amount of IrO2 dispersed on a carbon support, 10 wt.% IrO2/C, showed similar durability during fuel starvation maintaining the cell performance comparable to the cell using a Pt/C cathode only. Carbon-supported IrO2, IrO2/C, was more effective than IrO2 particles in both maintaining the intrinsic performance and improving the cell durability during fuel starvation.

Injoon Jang; Imgon Hwang; Yongsug Tak

2013-01-01T23:59:59.000Z

314

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 Ĺ 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

315

Two-phase Cryogenic Avalanche Detectors with THGEM and hybrid THGEM/GEM multipliers operated in Ar and Ar+N2  

E-Print Network (OSTI)

Two-phase Cryogenic Avalanche Detectors (CRADs) with GEM and THGEM multipliers have become an emerging potential technique for charge recording in rare-event experiments. In this work we present the performance of two-phase CRADs operated in Ar and Ar+N2. Detectors with sensitive area of 10x10 cm2, reaching a litre-scale active volume, yielded gains of the order of 1000 with a double-THGEM multiplier. Higher gains, of about 5000, have been attained in two-phase Ar CRADs with a hybrid triple-stage multiplier, comprising of a double-THGEM followed by a GEM. The performance of two-phase CRADs in Ar doped with N2 (0.1-0.6%) yielded faster signals and similar gains compared to the operation in two-phase Ar. The applicability to rare-event experiments is discussed.

A. Bondar; A. Buzulutskov; A. Dolgov; A. Grebenuk; E. Shemyakina; A. Sokolov; D. Akimov; A. Breskin; D. Thers

2012-10-02T23:59:59.000Z

316

Measurements of linestrengths, N2-, Ar-, He- and self-broadening coefficients of acetylene in the ?4+?5 combination band using a cw quantum cascade laser  

Science Journals Connector (OSTI)

Abstract Linestrengths, N2-, Ar-, He- and self-broadening coefficients of acetylene have been measured at 296 K in the P branch of the ?4+?5 combination band for 25 rotational transitions. The effect of gas temperature is studied over 296–683 K for five transitions to allow the determination of the temperature dependent exponent n for N2- and Ar-broadening coefficients. These measurements were performed using a continuous-wave quantum cascade laser (cw-QCL) operating over 1253–1310 cm?1. Spectroscopic parameters were obtained by fitting absorption spectra using Voigt, Galatry and Rautian profiles. Linestrength and broadening results are compared with previous studies available in literature for the ?4+?5 combination band and other vibrational bands of acetylene.

Muhammad Bilal Sajid; Et-touhami Es-sebbar; Aamir Farooq

2014-01-01T23:59:59.000Z

318

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

319

The retrieval of vertical profiles of chlorine source gases and N2O5 from MIPAS-B-92 limb emission spectra  

SciTech Connect

During the European Arctic Stratospheric Ozone Experiment (EASOE) the balloon-borne cryogenic Fourier transform spectrometer MIPAS (Michelson Interferometer for Passive Atmospheric Sounding) recorded several sequences of mid-infrared limb emission spectra, which were used for the retrieval of vertical profiles of CFC-11, CFC-12, HCFC-22, CF4, and N2O5. These gases are characterized by very dense emission bands of unresolved lines. Results are consistent with the current theories of stratospheric dynamics and chemistry.

Clarmann, T.V.; Linden, A.; Wetzel, G.; Oelhaf, H.

1995-01-01T23:59:59.000Z

320

Demonstration of achromatic cold-neutron microscope utilizing axisymmetric focusing mirrors  

SciTech Connect

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

Note: This page contains sample records for the topic "ir microscope n2" 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

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

322

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

323

A first principle study for the adsorption and absorption of carbon atom and the CO dissociation on Ir(100) surface  

SciTech Connect

We employ density functional theory to examine the adsorption and absorption of carbon atom as well as the dissociation of carbon monoxide on Ir(100) surface. We find that carbon atoms bind strongly with Ir(100) surface and prefer the high coordination hollow site for all coverages. In the case of 0.75?ML coverage of carbon, we obtain a bridging metal structure due to the balance between Ir–C and Ir–Ir interactions. In the subsurface region, the carbon atom prefers the octahedral site of Ir(100) surface. We find large diffusion barrier for carbon atom into Ir(100) surface (2.70 eV) due to the strong bonding between carbon atom and Ir(100) surface, whereas we find a very small segregation barrier (0.22 eV) from subsurface to the surface. The minimum energy path and energy barrier for the dissociation of CO on Ir(100) surface are obtained by using climbing image nudge elastic band. The energy barrier of CO dissociation on Ir(100) surface is found to be 3.01 eV, which is appreciably larger than the association energy (1.61 eV) of this molecule.

Erikat, I. A., E-mail: ihsanas@yahoo.com [Department of Physics, Jerash University, Jerash-26150 (Jordan); Hamad, B. A. [Department of Physics, The University of Jordan, Amman-11942 (Jordan)] [Department of Physics, The University of Jordan, Amman-11942 (Jordan)

2013-11-07T23:59:59.000Z

324

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

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

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

325

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

SciTech Connect

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

326

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

E-Print Network (OSTI)

This thesis presents a microscopic description of isoscalar giant resonance excitations in ??Ca and ąą? 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

327

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

328

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

329

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

330

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.

331

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

332

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

333

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

334

Ultralow platinum-loading PtPdRu@PtRuIr/C catalyst with excellent CO tolerance and high performance for the methanol oxidation reaction  

Science Journals Connector (OSTI)

Catalysts of Pd4%Pt10%Ru5%Ir2%/C, Pd4%@Pt10%Ru5%Ir2%/C, Pd4%Pt2%@Pt8%Ru5%Ir2%/C, and Pd4%Pt2%Ru2%@Pt8%Ru3%Ir2%/C were referred to as PDRI, D@PRI, PD@PRI, and PDR...

Yan-Ni Wu; Shi-Jun Liao; Hai-Fu Guo; Xiang-Ying Hao; Zhen-Xing Liang

2014-06-01T23:59:59.000Z

335

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

336

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

337

Low dose IR stimulation of TGF-β1 in vivo and downstream activation of  

NLE Websites -- All DOE Office Websites (Extended Search)

IR stimulation of TGF-β1 in vivo and downstream activation of the IR stimulation of TGF-β1 in vivo and downstream activation of the IGF-1-sCLU pro-survival expression axis: A bystander and adaptive survival mechanism in vivo David Boothman University of Texas Southwestern Medical Center at Dallas Abstract Over the past few years our laboratory has elucidated the regulatory mechanisms governing the insulin-like growth factor-1 (IGF-1) - secretory clusterin (sCLU) expression axis, which can be induced by >2 cGy in vivo and in vitro with the same dose-response kinetics. IGF-1-sCLU expression can be induced by (A) TGF-β1 and (B) IR, but is suppressed by the p53 and Klotho tumor suppressors. Interestingly, there is a substantial difference between the regulatory mechanisms of IGF-1-sCLU induction after TGF-β1 and IR exposures, where p53 suppresses IR responses but does not suppress after

338

Integration of microfluidics and FT-IR microscopy for label-free study of enzyme kinetics  

Science Journals Connector (OSTI)

Abstract In this article we report on the integration of microfluidics with FT-IR microscopy for the label-free study of enzyme kinetics. The IR compatible microfluidic chip was fabricated by standard photolithography processes using a photopatternable PDMS and infrared transparent materials (Si and CaF2). Chip characterization was performed with an imaging focal plane array (FPA) detector. The enzymatic oxidation of glucose catalyzed by glucose oxidase, which served as a model system, was monitored on-chip in real time in a label-free manner using FT-IR microscopy. The reference FT-IR measurements were carried out using the attenuated total reflection (ATR) accessory. Michaelis–Menten parameters for glucose-oxidase were estimated from the spectral measurements both on-chip and off-chip. The proposed microfluidic approach for enzyme reaction monitoring serves as a novel strategy for FT-IR microscopy allowing for minimal reaction volumes, measurement automation and flexibility in terms of spatial, spectral and temporal data acquisition and offers new opportunities in kinetics studies of various bio(chemical) reactions.

Evgeny Polshin; Bert Verbruggen; Daan Witters; Bert Sels; Dirk De Vos; Bart Nicolaď; Jeroen Lammertyn

2014-01-01T23:59:59.000Z

339

An Improved Daylight Correction for IR Loss in ARM Diffuse SW Measurements  

NLE Websites -- All DOE Office Websites (Extended Search)

An Improved Daylight Correction for IR Loss An Improved Daylight Correction for IR Loss in ARM Diffuse SW Measurements C. N. Long, K. Younkin, and K. L. Gaustad Pacific Northwest National Laboratory Richland, Washington J. A. Augustine National Oceanic and Atmospheric Administration Air Resources Laboratory Surface Radiation Research Branch Boulder, Colorado Introduction A paper by Cess et al. (2000) notes that some clear-sky diffuse shortwave (SW) measurements they were using from the Atmospheric Radiation Measurement (ARM) Southern Great Plains (SGP) site exhibited less than Rayleigh magnitude. Remarking that this is a physical impossibility, the obvious conclusion forwarded by the authors was that there was some problem with the ARM SGP diffuse SW data. Shortly thereafter, the problem of infrared (IR) loss from thermopile-based single black detector

340

Structure and Magnetic Properties of the Pyrochlore Iridate Y2Ir2O7  

SciTech Connect

Neutron powder diraction and inelastic measurements were performed examining the 5d py- rochlore Y2Ir2O7. Temperature dependent measurements were performed between 3.4 K and 290 K, spanning the magnetic transition at 155 K. No sign of any structural or disorder induced phase transition were observed over the entire temperature range. In addition, no sign of magnetic long- range order was observed to within the sensitivity of the instrumentation. These measurements do not rule out long range magnetic order, but the neutron powder diraction structural renements do put an upper bound for the ordered iridium moment of 0.2 B=Ir (for a magnetic structure with wave vector Q 6= 0) or 0.5 B=Ir (for Q = 0).

Shapiro, Max C [Stanford University; Riggs, Scott [Stanford University; Stone, Matthew B [ORNL; Dela Cruz, Clarina R [ORNL; Chi, Songxue [University of Tennessee, Knoxville (UTK); Podlesnyak, Andrey A [ORNL; Fisher, Ian R [Stanford University

2012-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "ir microscope n2" 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

Microsoft Word - Responses for IRS Notices 2006-24, 25 May 5 2006.doc  

NLE Websites -- All DOE Office Websites (Extended Search)

questions related to: questions related to: IRS Notice 2006-24, Qualifying Advanced Coal Project Program, IRS Notice 2006-25, Qualifying Gasification Program May 5, 2006 DOE is answering questions related only to DOE certifications. Other questions should be directed to the IRS by calling Doug Kim or Kathy Reed at (202) 622-3110, or by faxing the questions to them at (202) 622-4779. 36. Independent Financial Analyst a. Will a duly licensed CPA or CPA firm, which is independent of the applicant under the profession's promulgated rules on independence, meet the definition of "Independent Financial Analyst"? If so, will they still be required to state, in the report, their qualifications and experience that establishes their competence to evaluate project financing?

342

Near-IR [Fe II] emission diagnostics applied to cold disk winds in young stars  

E-Print Network (OSTI)

We investigate the emissivity properties of the main near-IR transitions of the Fe+ ion in the conditions prevailing in the inner regions of jets from young stars, based on a simplified 16-level atom model. We present new diagnostic diagrams involving prominent near-IR line ratios that allow us to constrain the electronic density, temperature, and Fe gas phase abundance ratio, independently of the heating process. Comparison with recent near-IR observations of a sample of HH objects indicates gas phase Fe abundances ranging from 15-50 % up to 100 % of the solar value in agreement with the moderate depletions previously derived from optical line ratios or shock models. Hence, it appears that Fe-bearing dust is efficiently destroyed in stellar jets. We then use our Fe+ emissivity model to predict near-IR [Fe II] emission maps for self-similar, cold MHD disk wind models. We show that observations in [Fe II] with AMBER on the VLTI could severely constrain the MHD solution and the inner launch radius of the jet. We also compare theoretical predictions with recent observations in the near-IR [Fe II] lines of the L1551-IRS5 and DG Tau jets. The cold disk wind model reproduces quite well the two velocity components observed at -100 and -300 km/s, although the high velocity component appears overestimated by a factor of 1.5 in the DG Tau jet. However, the model predicts too little emission at intermediate-velocity and insufficient densities. Denser disk winds with stronger heating at the jet base, which have been invoked for optical jets, also appear needed in younger, embedded Class I jet sources.

N. Pesenti; C. Dougados; S. Cabrit; D. O'Brien; P. Garcia; J. Ferreira

2003-10-16T23:59:59.000Z

343

Assessing the N2O/CO2 high pressure separation using ionic liquids with the soft-SAFT EoS  

Science Journals Connector (OSTI)

Abstract The capabilities of the soft-SAFT EoS to accurately describe the thermophysical properties of ionic liquids (ILs) and the phase equilibria of their mixtures with greenhouse gases is extended in this work to address the CO2 and the N2O solubilities in [C4mim]+ \\{ILs\\} from different anion families. In addition to the commonly studied [BF4]? and [NTf2]? anions, the solubility of these gases in \\{ILs\\} with the anions [N(CN)2]?, [SCN]? and [Ac]? is also studied and compared among them, searching for the best system for separation purposes. A coarse-grained molecular model is proposed within the soft-SAFT framework for each newly studied IL based on structural information, guidance obtained from quantum calculations and previous work. The most adequate set of molecular parameters are selected from the \\{ILs\\} density description and from the ability to reproduce the N2O/CO2 solubilities in these \\{ILs\\} at the lowest and highest temperatures for which experimental data are available. A discussion about the association molecular parameters values and their relation with the anion nature is also presented. With these molecular models, the description of the high pressure phase equilibria of the binary systems composed of the two gases and the \\{ILs\\} referred above are described with soft-SAFT for the remaining isotherms. For most systems, the equilibria behavior of the mixtures is predicted without using any binary parameter. When good agreement with the experimental data is not achieved, a single temperature independent binary parameter is enough to allow a good description. Finally, Henry's law constants are calculated from soft-SAFT to evaluate the selectivity of those \\{ILs\\} for the CO2/N2O separation.

Luís M.C. Pereira; Mariana B. Oliveira; Felix Llovell; Lourdes F. Vega; Joăo A.P. Coutinho

2014-01-01T23:59:59.000Z

344

Radial Electric Field and its Influence on Poloidal Magnetic Field Oscillations in the IR-T1 Tokamak  

Science Journals Connector (OSTI)

The radial electric field has been investigated in the edge plasma of IR-T1 tokamak by movable sets of single Langmuir probes....

Hamid Bolourian; Pejman Khorshid; Mahmoud Ghoranneviss…

2010-06-01T23:59:59.000Z

345

Mechanism of Efficient Anti-Markovnikov Olefin Hydroarylation Catalyzed by Homogeneous Ir(III) Complexes  

SciTech Connect

The mechanism of the hydroarylation reaction between unactivated olefins (ethylene, propylene, and styrene) and benzene catalyzed by [(R)Ir(?-acac-O,O,C{sup 3})-(acac-O,O){sub 2}]{sub 2} and [R-Ir(acac-O,O){sub 2}(L)] (R = acetylacetonato, CH{sub 3}, CH{sub 2}CH{sub 3}, Ph, or CH{sub 2}CH{sub 2}Ph, and L = H{sub 2}O or pyridine) Ir(III) complexes was studied by experimental methods. The system is selective for generating the anti-Markovnikov product of linear alkylarenes (61:39 for benzene + propylene and 98:2 for benzene + styrene). The reaction mechanism was found to follow a rate law with first-order dependence on benzene and catalyst, but a non-linear dependence on olefin. {sup 13}C-labelling studies with CH{sub 3}{sup 13}CH{sub 2}-Ir-Py showed that reversible ?-hydride elimination is facile, but unproductive, giving exclusively saturated alkylarene products. The migration of the {sup 13}C-label from the ? to ?-positions was found to be slower than the C–H activation of benzene (and thus formation of ethane and Ph-d{sub 5}-Ir-Py). Kinetic analysis under steady state conditions gave a ratio of the rate constants for CH activation and ?-hydride elimination (k{sub CH}: k{sub ?}) of ~0.5. The comparable magnitude of these rates suggests a common rate determining transition state/intermediate, which has been shown previously with B3LYP density functional theory (DFT) calculations. Overall, the mechanism of hydroarylation proceeds through a series of pre-equilibrium dissociative steps involving rupture of the dinuclear species or the loss of L from Ph-Ir-L to the solvento, 16-electron species, Ph-Ir(acac-O,O){sub 2}-Sol (where Sol refers to coordinated solvent). This species then undergoes trans to cisisomerization of the acetylacetonato ligand to yield the pseudo octahedral species cis-Ph-Ir-Sol, which is followed by olefin insertion (the regioselective and rate determining step), and then activation of the C–H bond of an incoming benzene to generate the product and regenerate the catalyst.

Bhalla, Gaurav; Bischof, Steven M; Ganesh, Somesh K; Liu, Xiang Y; Jones, C J; Borzenko, Andrey; Tenn, William J; Ess, Daniel H; Hashiguchi, Brian G; Lokare, Kapil S; Leung, Chin Hin; Oxgaard, Jonas; Goddard, William A; Periana, Roy A

2011-01-01T23:59:59.000Z

346

Relationship Between Onset Thresholds, Trigger Types, and Rotation Shear for the m/n=2/1 Neoclassical Tearing Mode in a High-? Spherical Torus  

SciTech Connect

The onset conditions for the m/n=2/1 neoclassical tearing mode (NTM) are studied in terms of neoclassical drive, triggering instabilities, and toroidal rotation or rotation shear, in the spherical torus NSTX [M. Ono, et al., Nuclear Fusion 40, 557 (2000)]. There are three typical onset conditions for these modes, given in order of increasing neoclassical drive required for mode onset: triggering by energetic particle modes, triggering by edge localized modes, and cases where the modes appear to grow without a trigger. In all cases, the required drive increases with toroidal rotation shear, implying a stabilizing effect from the shear.

Gerhardt, S. P.; Brennan, D. P.; Buttery, R.; La Haye, R. J.; Sabbagh, S.; Strait, E.; Bell, M.; Bell, R.; Fredrickson, E.; Gates, D.; LeBlanc, B.; Menard, J.; Stutman, D.; Tritz, K.; Yuh, H.

2009-02-24T23:59:59.000Z

347

Investigation of the liquid/vapor composition of compressed liquid CO2 with N2 and O2 in integrated pollutant removal systems for coal combustion  

SciTech Connect

Accurate prediction of the processes in Integrated Pollutant Removal (IPR) using compression and condensation of coal combustion products requires an understanding of the liquid/vapor ternary CO2/O2/N2 system. At conditions close to the critical point of CO2 the existing equations of state deviate from the sparse measured results available in the literature. Building on existing data and procedures, the USDOE/Albany Research Center has designed an apparatus for examining compositions in this region. The design of the apparatus and planned initial experiments are presented.

Oryshchyn, Danylo B.; Ochs, Thomas L.; Summers, Cathy A.; Penner, Larry R.; Gerdemann, Stephen J.

2005-01-01T23:59:59.000Z

348

Open chain versus cyclic 14-electron triatomics: molecular structures and vibrational frequencies of P2Si, P2C, SiN2 and Si2S  

Science Journals Connector (OSTI)

Since the studies of Walsh in the 1950s, triatomic molecules have provided a field of investigation for the fundamentals of bonding. A general consensus has been that rings are higher in energy than open chains due to the strain associated with narrow bond angles. The 14-valence-electron triatomics P2Si, P2C, SiN2, and Si2S were investigated using ab initio molecular quantum mechanical methods. Double zeta plus polarization (DZP) and triple zeta plus double polarization (TZ2P) basis sets have been used in conjunction with self-consistent field (SCF), single and double excitation configuration interaction (CISD) and coupled cluster (CCSD) methods. The all third period \\{P2Si\\} and Si2S were found to have rings as their lowest-energy geometries. The ring geometry of P2C is high in energy because it necessitates formation of a carbene. The ring geometry of SiN2 is only about 5 kcal/mol above the linear Si?N?N isomer.

Randall D. Davy; Henry F. Schaefer III

1996-01-01T23:59:59.000Z

349

ELSEVIER International Journal of Industrial Ergonomics 17 (1996) 285-290 Ir~ernattonatlournalc~  

E-Print Network (OSTI)

ELSEVIER International Journal of Industrial Ergonomics 17 (1996) 285-290 Ir~ernattonatlournalc~ Industrial Ergonomics Short communication A new method for extending the range of conductive polymer sensors measurement instruments are important for providing ergonomics practitioners with a quantitative means

Radwin, Robert G.

350

Near-IR [Fe II] emission diagnostics applied to cold disk winds in young stars  

E-Print Network (OSTI)

We investigate the emissivity properties of the main near-IR transitions of the Fe+ ion in the conditions prevailing in the inner regions of jets from young stars, based on a simplified 16-level atom model. We present new diagnostic diagrams involving prominent near-IR line ratios that allow us to constrain the electronic density, temperature, and Fe gas phase abundance ratio, independently of the heating process. Comparison with recent near-IR observations of a sample of HH objects indicates gas phase Fe abundances ranging from 15-50 % up to 100 % of the solar value in agreement with the moderate depletions previously derived from optical line ratios or shock models. Hence, it appears that Fe-bearing dust is efficiently destroyed in stellar jets. We then use our Fe+ emissivity model to predict near-IR [Fe II] emission maps for self-similar, cold MHD disk wind models. We show that observations in [Fe II] with AMBER on the VLTI could severely constrain the MHD solution and the inner launch radius of the jet. W...

Pesenti, N; Cabrit, S; O'Brien, D; García, P; Ferreira, J

2003-01-01T23:59:59.000Z

351

Royalty Payments & Tax Treaty Procedures Information and IRS forms for MIT Press authors  

E-Print Network (OSTI)

Royalty Payments & Tax Treaty Procedures Information and IRS forms for MIT Press authors Forms the forms. Royalty Payment Schedule Royalty statements and payments will be made for each royalty year will not be returned. Please see page 3 of the W-7 application for complete details. Tax Treaty Claim on Royalty

Jackson, Daniel

352

Structure-property relations in negative permittivity reststrahlen materials for IR metamaterial applications.  

SciTech Connect

We will present a study of the structure-property relations in Reststrahlen materials that possess a band of negative permittivities in the infrared. It will be shown that sub-micron defects strongly affect the optical response, resulting in significantly diminished permittivities. This work has implications on the use of ionic materials in IR-metamaterials.

Kotula, Paul Gabriel; Rodriguez, Mark Andrew; Shelton, David J. (University of Central Florida); Carroll, James F., III; Boreman, Glenn D. (University of Central Florida); Sinclair, Michael B.; Ihlefeld, Jon F.; Ginn, James Cleveland, III; Clem, Paul Gilbert; Matias, Vladimir (Los Alamos National Laboratory)

2010-09-01T23:59:59.000Z

353

Magnetic and crystal structures of Sr2IrO4: A neutron diffraction study  

Science Journals Connector (OSTI)

We report a single-crystal neutron diffraction study of the layered Sr2IrO4. This work unambiguously determines the magnetic structure of the system and reveals that the spin orientation rigidly tracks the staggered rotation of the IrO6 octahedra in Sr2IrO4. The long-range antiferromagnetic order has a canted spin configuration with an ordered moment of 0.208(3) ?B/Ir site within the basal plane; a detailed examination of the spin canting yields 0.202(3) and 0.049(2) ?B/site for the a axis and the b axis, respectively. It is intriguing that forbidden nuclear reflections of space group I41/acd are also observed in a wide temperature range from 4 K to 600 K, which suggests a reduced crystal structure symmetry. This neutron-scattering work provides a direct, well-refined experimental characterization of the magnetic and crystal structures that are crucial to the understanding of the unconventional magnetism exhibited in this unusual magnetic insulator.

Feng Ye, Songxue Chi, Bryan C. Chakoumakos, Jaime A. Fernandez-Baca, Tongfei Qi, and G. Cao

2013-04-22T23:59:59.000Z

354

On Linear Independence of Generators of FSI Distribution Spaces on IR  

E-Print Network (OSTI)

On Linear Independence of Generators of FSI Distribution Spaces on IR Jianzhong Wang Abstract. A distribution space is called finitely shift invariant (FSI) if it is generated by a vector-valued distribution of an FSI distribution space and presents a way to find the generators with linear independent shifts

Wang, Jianzhong

355

IR Spectroscopy Spectroscopy: Branch of science in which light or other electromagnetic radiation  

E-Print Network (OSTI)

is resolved into its component wavelengths to produce spectra, which are graphs of intensity vs. wavelength or frequency of radiation. Current usage broadens this definition to include some methods that don't involve the energy difference of 2 quantum levels of the sample of matter. hE = IR Spectroscopy Tool for examining

Sherrill, David

356

Nonlinear Retrieval of Atmospheric Profiles from MetOp-IASI and MTG-IRS Data  

E-Print Network (OSTI)

Nonlinear Retrieval of Atmospheric Profiles from MetOp-IASI and MTG-IRS Data Gustavo Camps-Vallsa , Luis Guanterb , Jordi Mu~noz-Mar´ia , Luis G´omez-Chovaa and Xavier Calbetc a Image Processing retrieval methods to derive cloud, surface and atmospheric properties from hyperspectral MetOp-IASI and MTG

Camps-Valls, Gustavo

357

IR Principles for Content-based Indexing and Retrieval of Functional Brain Images  

E-Print Network (OSTI)

IR Principles for Content-based Indexing and Retrieval of Functional Brain Images Bing Bai, Paul cornea, silver@ece.rutgers.edu ABSTRACT In this paper, we explore the concept of a "library of brain images", which implies not only a repository of brain images, but also efficient search and retrieval

358

IR Principles for Content-based Indexing and Retrieval of Functional Brain Images  

E-Print Network (OSTI)

IR Principles for Content-based Indexing and Retrieval of Functional Brain Images Bing Bai, Paul of a "library of brain images", which implies not only a repository of brain images, but also efficient search worked with a collection of functional MRI brain images assembled in the study of several distinct cogni

359

Hydrogen Bond Migration between Molecular Sites Observed with Ultrafast 2D IR Chemical Exchange Spectroscopy  

E-Print Network (OSTI)

Hydrogen Bond Migration between Molecular Sites Observed with Ultrafast 2D IR Chemical ExchangeVed: January 12, 2010 Hydrogen-bonded complexes between phenol and phenylacetylene are studied using ultrafast hydrogen bonding acceptor sites (phenyl or acetylene) that compete for hydrogen bond donors in solution

Fayer, Michael D.

360

Water Dynamics in Salt Solutions Studied with Ultrafast Two-Dimensional Infrared (2D IR)  

E-Print Network (OSTI)

Water Dynamics in Salt Solutions Studied with Ultrafast Two-Dimensional Infrared (2D IR RECEIVED ON FEBRUARY 3, 2009 C O N S P E C T U S Water is ubiquitous in nature, but it exists as pure water infrequently. From the ocean to biology, water molecules interact with a wide variety of dissolved species

Fayer, Michael D.

Note: This page contains sample records for the topic "ir microscope n2" 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

The Influence of Word Detection Variability on IR Performance in Automatic Audio Indexing of Course Lectures  

E-Print Network (OSTI)

audio lectures for an under- graduate level engineering course at McGill University. The taskThe Influence of Word Detection Variability on IR Performance in Automatic Audio Indexing of Course Lectures Renato Rispoli, Richard Rose, and Jon Arrowood* Dept. of Electrical and Computer Engineering Mc

Rose, Richard

362

Chiral RKKY interaction in Pr[subscript 2]Ir[subscript 2]O[subscript 7  

E-Print Network (OSTI)

Motivated by the potential chiral spin liquid in the metallic spin ice Pr[subscript 2]Ir[subscript 2]O[subscript 7], we consider how such a chiral state might be selected from the spin-ice manifold. We propose that chiral ...

Flint, Rebecca

363

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

SciTech Connect

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

364

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

SciTech Connect

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

365

Electron-impact excitation from metastable helium: 2t1,3 S?nt1,3 L (L=0, 1, 2; n=2,…,?)  

Science Journals Connector (OSTI)

Integral cross sections for electron-impact excitation from the helium 2 3 S and 2 1 S metastable excited states, to all energetically higher S, P, and D excited states, are reported from threshold to 200 eV. These cross sections have been obtained using the distorted-wave approximation, and are compared to other experimental and theoretical results. Special attention is paid to obtaining an adequate representation for the wave functions of the n 1 S excited states (n=2, 3, and 4). The total integral electronic excitation cross sections from each of these metastable states, summed over n for fixed L of the final state, and then summed over L, are also reported. These results are combined with other cross-section data to obtain the total inelastic integral cross section for inelastic electron scattering from each of these two helium metastable states.

D. C. Cartwright and G. Csanak

1997-03-01T23:59:59.000Z

366

Inexpensive discrete atomistic model technique for studying excitations on infinite disordered media: the case of orientational glass ArN$_2$  

E-Print Network (OSTI)

Excitations of disordered systems such as glasses are of fundamental and practical interest but computationally very expensive to solve. Here we introduce a technique for modeling these excitations in an infinite disordered medium with a reasonable computational cost. The technique relies on a discrete atomic model to simulate the low-energy behavior of an atomic lattice with molecular impurities. The interaction between different atoms is approximated using a spring like interaction based on the Lennard Jones potential but can be easily adapted to other potentials. The technique allows to solve a statistically representative number of samples with a minimum of computational expense, and uses a Monte-Carlo approach to achieve a state corresponding to any given temperature. This technique has already been applied successfully to a problem with interest in condensed matter physics: the solid solution of N$_2$ in Ar.

González-Albuixech, V F

2014-01-01T23:59:59.000Z

367

2659 heat insulation [n] (2)  

Science Journals Connector (OSTI)

constr....(Protection against heat provided by heat-shielding materials in the outer walls of a building to prevent heat build-up in hot regions or in temperate climates during the summer. In tempera...

2010-01-01T23:59:59.000Z

368

6262 swimming pool [n] (2)  

Science Journals Connector (OSTI)

recr. (Pool for swimmers, frequently one structure with descending... swimming center [US] /swimming centre [UK]; opp. ? wading pool

2010-01-01T23:59:59.000Z

369

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.

370

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

371

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

372

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.

373

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

374

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

375

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.

376

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

377

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

378

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

379

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

380

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.

Note: This page contains sample records for the topic "ir microscope n2" 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

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

382

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

SciTech Connect

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

383

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.

384

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

385

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

386

A link between stem cells and the EMT phenotype induced by IR and TGFβ  

NLE Websites -- All DOE Office Websites (Extended Search)

link between stem cells and the EMT phenotype induced by IR and TGFβ link between stem cells and the EMT phenotype induced by IR and TGFβ Ignacio Fernandez-Garcia New York University School of Medicine Abstract Epithelial-Mesenchymal Transition (EMT) occurs as key developmental program but is also often activated during cancer progression. EMT is characterized by loss of epithelial cell polarity, loss of cell-cell contacts, and acquisition of mesenchymal markers and phenotypic traits that include increased cell motility1. Approximately 18% of breast cancers exhibit evidence of EMT. We have shown that the progeny of irradiated human mammary epithelial cells (HMEC) undergo EMT when exposed to transforming growth factor β1 (TGFβ). Additionally, recent publication from Weinberg and colleagues showed that induction of EMT through engineered expression of

387

About ÂŤEffectiveÂŽ Height of the Aerosol Atmosphere in Visible and IR Wavelength Range  

NLE Websites -- All DOE Office Websites (Extended Search)

"Effective" Height of the Aerosol Atmosphere in "Effective" Height of the Aerosol Atmosphere in Visible and IR Wavelength Range V. N. Uzhegov, D. M. Kabanov, M. V. Panchenko, Yu. A. Pkhalagov, and S. M. Sakerin Institute of Atmospheric Optics Tomsk, Russia Introduction Aerosol component of the atmosphere is one of the important factors affecting the radiation budget of the space - atmosphere - underlying surface system in visible and infrared (IR) wavelength ranges. It is extremely important to take into account the contribution of this component into the extinction of solar radiation under cloudless sky conditions. Sometimes it is important to know not only the total value of the aerosol component of extinction, but also to have the possibility to estimate the "effective" height of

388

Microsoft Word - Responses for IRS Notices 2006 24 and 25 May 4 2006.doc  

NLE Websites -- All DOE Office Websites (Extended Search)

6-24, Qualifying Advanced Coal Project Program, 6-24, Qualifying Advanced Coal Project Program, IRS Notice 2006-25, Qualifying Gasification Program May 4, 2006 DOE is answering questions related only to DOE certifications. Other questions should be directed to the IRS by calling Doug Kim or Kathy Reed at (202) 622-3110, or by faxing the questions to them at (202) 622-4779. 21. Waste Coal. Is it correct that a low-cost anthracite culm (i.e., culm is defined as coal waste that consists of coal and rock with varying amounts of carbon material remaining after removal of a higher-quality saleable coal) qualifies for clean coal investment tax credits under sections 48A and 48B? Kindly assume that the producer procured the culm from a culm bank (i.e., ubiquitous piles or other depository of culm on

389

Improved ARM-SGP TOA OLR Fluxes from GOES-8 IR Radiances Based on CERES Data  

NLE Websites -- All DOE Office Websites (Extended Search)

ARM-SGP TOA OLR Fluxes from GOES-8 IR ARM-SGP TOA OLR Fluxes from GOES-8 IR Radiances Based on CERES Data D. R. Doelling and M. M. Khaiyer Analytical Services and Materials, Inc. Hampton, Virginia P. Minnis National Aeronautics and Space Administration Langley Research Center Hampton, Virginia Introduction The radiation budget at the top of the atmosphere (TOA) is a quantity of fundamental importance to the Atmospheric Radiation Measurement (ARM) Program. Thus, it is necessary to measure the radiation budget components, broadband shortwave albedo and outgoing longwave radiation (OLR), as accurately as possible. Measurement of OLR over the ARM surface sites has only been possible since the advent of Clouds and the Earth's Radiant Energy System (CERES; Wielicki et al. 1998) in 1998. Prior to

390

To: John R. Novak Radiation Safety - IRS From: G. T. Lonergan Radiation Safety - II§  

Office of Legacy Management (LM)

7, 19% 7, 19% To: John R. Novak Radiation Safety - IRS From: G. T. Lonergan Radiation Safety - II§ Subject: Extrusion of Billets, Titus Metals, Inc., Waterloo, Iowa A grpup of ANL aqloyees consisting of LE. Walker and S. Matsas (MET), E. Leverens (SSE), I(. C.~Buffy'(SPM), and G. T. Lonergan (IRS), traveled to Waterloo, Iowa, on June 29 where they accomplished the extrusion of U308 billets into fuel plates for Argonaut. Prior to beginning the extrusion operation, the floor area around the press, run-out table, stretch straightener, and all accessible portions of the press were surveyed. No activity was detected. The floor area from the furnace (uhere the billets were heated) to the press was coveredwith a layer of vinyl approximately 48fl wide and topped

391

Prospects and merits of metal-clad semiconductor lasers from nearly UV to far IR  

E-Print Network (OSTI)

Using metal-clad (or plasmonic) waveguide structures in semiconductor lasers carries a promise of reduced size, threshold, and power consumption. This promise is put to a rigorous theoretical test, that takes into account increased waveguide loss, Auger recombination, and Purcell enhancement of spontaneous recombination. The conclusion is that purported benefits of metal waveguides are small to nonexistent for all the band-to-band and intersubband lasers operating from UV to Mid-IR range, with a prominent exception of far-IR and THz quantum cascade lasers. For these devices, however, metal waveguides already represent the state of the art, and the guiding mechanism in them has far more in common with a ubiquitous transmission line than with plasmonics.

Khurgin, Jacob B

2015-01-01T23:59:59.000Z

392

Enhanced oxygen evolution activity of IrO2 and RuO2 (100) surfaces  

SciTech Connect

The activities of the oxygen evolution reaction (OER) on IrO2 and RuO2 catalysts are among the highest known to date. However, the intrinsic OER activities of surfaces with defined crystallographic orientations are not well established experimentally. Here we report that the (100) surface of IrO2 and RuO2 is more active than the (110) surface that has been traditionally explored by density functional theory studies. The relation between the OER activity and density of coordinatively undersaturated metal sites exposed on each rutile crystallographic facet is discussed. The surface-orientation dependent activities can guide the design of high-surface-area catalysts with increased activity for electrolyzers, metal-air batteries, and photoelectrochemical water splitting applications.

Stoerzinger, Kelsey [Massachusetts Institute of Technology (MIT)] [Massachusetts Institute of Technology (MIT); Qiao, Liang [ORNL] [ORNL; Biegalski, Michael D [ORNL] [ORNL; Christen, Hans M [ORNL] [ORNL; Shao-Horn, Yang [Massachusetts Institute of Technology (MIT)] [Massachusetts Institute of Technology (MIT)

2014-01-01T23:59:59.000Z

393

Sorption properties of technical lignins. III. IR-spectral investigation of the sorption capacity of technical lignins and their derivatives in relation to bile acids  

Science Journals Connector (OSTI)

It has been established by IR-spectral investigations that the sorption of bile acids by technical lignins takes...

G. N. Dalimova; É. L. Kristallovich

394

The near-IR luminosity-metallicity relationship for dwarf irregular galaxies  

E-Print Network (OSTI)

We briefly describe our on-going investigation of the near-IR luminosity-metallicity relationship for dwarf irregular galaxies in nearby groups of galaxies. The motivations of the project and the observational databases are introduced, and a preliminary result is presented. The 12+log(O/H) vs.H plane must be populated with more low-luminosity galaxies before a definite conclusion can be drawn.

Saviane, I; Held, E V; Ivanov, V; Alloin, D; Bresolin, F; Momany, Y; Rich, R M; Rizzi, L; Saviane, Ivo

2003-01-01T23:59:59.000Z

395

FREE TAX FILING VITA is a program sponsored by the IRS offering income tax preparation for  

E-Print Network (OSTI)

FREE TAX FILING VITA is a program sponsored by the IRS offering income tax preparation for families with income less than $58,000 for FREE. WALK-IN ONLY (at least 1 hour before closing) MORE INFO: csufvita@gmail.com / 657-278-8681 Free tax filing starts from Jan 31 to Apr 12 We are closed on Feb 1, Apr 3, 4 & 5

de Lijser, Peter

396

First law of thermodynamics in IR modified Ho?ava-Lifshitz gravity  

Science Journals Connector (OSTI)

We study the first law of thermodynamics in IR modified Ho?ava-Lifshitz spacetime. Based on the Bekenstein-Hawking entropy, we obtain the integral formula and the differential formula of the first law of thermodynamics for the Kehagias-Sfetsos black hole by treating ? as a new state parameter and redefining a mass that is just equal to MADM obtained by Myung [32] if we take ?=3?/8.

Mengjie Wang; Jiliang Jing; Chikun Ding; Songbai Chen

2010-04-15T23:59:59.000Z

397

First law of thermodynamics in IR modified Horava-Lifshitz gravity  

SciTech Connect

We study the first law of thermodynamics in IR modified Horava-Lifshitz spacetime. Based on the Bekenstein-Hawking entropy, we obtain the integral formula and the differential formula of the first law of thermodynamics for the Kehagias-Sfetsos black hole by treating {omega} as a new state parameter and redefining a mass that is just equal to M{sub ADM} obtained by Myung [32] if we take {alpha}=3{pi}/8.

Wang Mengjie; Jing Jiliang; Ding Chikun; Chen Songbai [Institute of Physics and Department of Physics, Hunan Normal University, Changsha, Hunan 410081 (China) and Key Laboratory of Low Dimensional Quantum Structures and Quantum Control of Ministry of Education, Hunan Normal University, Changsha, Hunan 410081 (China)

2010-04-15T23:59:59.000Z

398

IR Researchers  

NLE Websites -- All DOE Office Websites (Extended Search)

robotics systems. Mr. Larsen is the chief architect of software integration for the Yucca Mountain Waste Package Closure Welding and Inspection System. He has seven U.S....

399

IR Accomplishments  

NLE Websites -- All DOE Office Websites (Extended Search)

Inside Diameter Creeping Wave Sizing Methodology," in 5th International Conference on NDE in Relation to Structural Integrity for Nuclear and Pressurized Components, pp....

400

ULTRACAM photometry of the eclipsing cataclysmic variables GY Cnc, IR Com and HT Cas  

E-Print Network (OSTI)

We present high-speed, three-colour photometry of the eclipsing cataclysmic variables GY Cnc, IR Com and HT Cas. We find that the sharp eclipses in GY Cnc and IR Com are due to eclipses of the white dwarf. There is some evidence for a bright spot on the edge of the accretion disc in GY Cnc, but not in IR Com. Eclipse mapping of HT Cas is presented which shows changes in the structure of the quiescent accretion disc. Observations in 2002 show the accretion disc to be invisible except for the presence of a bright spot at the disc edge. 2003 observations, however, clearly show a bright inner disc and the bright spot to be much fainter than in 2002. Although no outburst was associated with either set of quiescent observations, the system was ~0.6 mJy brighter in 2003, mainly due to the enhanced emission from the inner disc. We propose that these changes are due to variations in the mass transfer rate from the secondary star and through the disc. The disc colours indicate that it is optically thin in both its inner and outer regions. We estimate the white dwarf temperature of HT Cas to be 15 000 +/- 1000 K in 2002 and 14 000 +/- 1000 K in 2003.

W. J. Feline; V. S. Dhillon; T. R. Marsh; C. A. Watson; S. P. Littlefair

2005-10-14T23:59:59.000Z

Note: This page contains sample records for the topic "ir microscope n2" 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

Reaction properties of NO and CO over an Ir(211) surface  

SciTech Connect

The adsorption and thermal reactivity of NO and CO over an Ir(211) surface were studied using x-ray photoelectron spectroscopy, infrared reflection absorption spectroscopy, and temperature-programed desorption. NO adsorbed on the atop site of the (111) terrace and the bridge site of the (100) step at 273 K. In contrast, CO adsorbed only on the atop site at 273 K, initially on the (111) terrace and then on the (100) step. Both atop NO and bridge NO decomposed to N{sub 2} through the recombination of atomic nitrogen, indicating that the Ir(211) surface provides high NO dissociation activity. When NO and CO were coadsorbed, the preadsorption of atop CO on the terrace sites selectively inhibited the adsorption of atop NO on the terrace sites, while preadsorption of atop CO on the step sites significantly inhibited the adsorption of bridge NO on the step sites. These results indicate that NO may be selectively reduced by CO in the presence of O{sub 2} when Ir(211) is used as the catalyst.

Nakamura, I.; Suzuki, K.; Takahashi, A.; Haneda, M.; Hamada, H.; Fujitani, T. [Research Institute for Innovation in Sustainable Chemistry, National Institute of Advanced Industrial Science and Technology (AIST), 16-1 Onogawa, Tsukuba, Ibaraki 305-8569 (Japan)

2007-07-15T23:59:59.000Z

402

Final technical report. In-situ FT-IR monitoring of a black liquor recovery boiler  

SciTech Connect

This project developed and tested advanced Fourier transform infrared (FT-IR) instruments for process monitoring of black liquor recovery boilers. The state-of-the-art FT-IR instruments successfully operated in the harsh environment of a black liquor recovery boiler and provided a wealth of real-time process information. Concentrations of multiple gas species were simultaneously monitored in-situ across the combustion flow of the boiler and extractively at the stack. Sensitivity to changes of particulate fume and carryover levels in the process flow were also demonstrated. Boiler set-up and operation is a complex balance of conditions that influence the chemical and physical processes in the combustion flow. Operating parameters include black liquor flow rate, liquor temperature, nozzle pressure, primary air, secondary air, tertiary air, boiler excess oxygen and others. The in-process information provided by the FT-IR monitors can be used as a boiler control tool since species indicative of combustion efficiency (carbon monoxide, methane) and pollutant emissions (sulfur dioxide, hydrochloric acid and fume) were monitored in real-time and observed to fluctuate as operating conditions were varied. A high priority need of the U.S. industrial boiler market is improved measurement and control technology. The sensor technology demonstrated in this project is applicable to the need of industry.

James Markham; Joseph Cosgrove; David Marran; Jorge Neira; Chad Nelson; Peter Solomon

1999-05-31T23:59:59.000Z

403

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

404

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

405

The Influence of Resonance Helical Field on the Z eff and Impurity Radiation in IR-T1 Tokamak  

Science Journals Connector (OSTI)

The influence of resonant helical field, RHF, on effective ion charge, Z eff, and impurity radiations on IR-T1 tokamak discharges was studied. The theoretical calculation of...Z ef...

M. Mahmoodi Darian; A. Hojabri; M. K. Salem; M. Ghoranneviss

2006-12-01T23:59:59.000Z

406

Measurement of Plasma Energy Confinement Time in Presence of Resonant Helical Field in IR-T1 Tokamak  

Science Journals Connector (OSTI)

Plasma energy confinement time is one of the main parameters of tokamak plasma and Lawson criterion. In this paper ... resonance helical field (RHF) in IR-T1 tokamak. For this purpose a diamagnetic loop with...L ...

A. Salar Elahi; M. Ghoranneviss

2009-12-01T23:59:59.000Z

407

Fourier Transform Infrared (FT-IR) Microspectroscopic Census of Single Starch Granules for Octenyl Succinate Ester Modification  

Science Journals Connector (OSTI)

Fourier transform infrared (FT-IR) microspectroscopy was used to investigate reaction homogeneity of octenyl succinic anhydride modification on waxy maize starch and detect uniformity of blends of modified and native starches. For the first time, the ...

Yanjie Bai; Yong-Cheng Shi; David L. Wetzel

2009-06-24T23:59:59.000Z

408

How do vibrations change their composition upon electronic excitation? – EXSY-T2D-IR measurements challenge DFT calculations.  

Science Journals Connector (OSTI)

The composition of excited state vibrations can be disentangled by projecting ground state vibrations on them using exchange transient two-dimensional IR spectroscopy. The results challenge excited state DFT c...

Andreas Messmer; Ana-Maria Blanco Rodríguez; Jakub Šebera…

2009-01-01T23:59:59.000Z

409

Remote processing, delivery and injection of H2[15O] produced from a N2/H2 gas target using a simple and compact apparatus  

Science Journals Connector (OSTI)

We report here a simple apparatus for remote trapping and processing of H2[15O] produced from the N2/H2 target. The system performs a three step operation for H2[15O] delivery at the PET imaging facility which includes the following: (i) collecting the radiotracer in sterile water; (ii) adjusting preparation pH through removal of radiolytically produced ammonia, while at the same time adjusting solution isotonicity; and (iii) delivery of the radiotracer preparation to the injection syringe in a sterile and pyrogen-free form suitable for human studies. The processing apparatus is simple, can be remotely operated and fits inside a Capintec Dose Monitoring Chamber for direct measurement of accumulated radioactivity. Using this system, 300 mCi of H2[15O] (15 ?A of 8 MeV D+ on target) is transferred from target through 120 m × 3.18 mm o.d. Impolene tubing to yield 100 mCi of H2[15O] which is isotonic, neutral and suitable for human studies. A remote hydraulically driven system for i.v. injection of the H2[15O] is also described. The device allows for direct measurement of syringe dose while filling, and for easy, as well as safe transport of the injection syringe assembly to the patient's bedside via a shielded delivery cart. This cart houses a hydraulic piston that allows the physician to “manually” inject the radiotracer without directly handling the syringe.

Richard A. Ferrieri; David L. Alexoff; David J. Schlyer; Alfred P. Wolf

1994-01-01T23:59:59.000Z

410

Effect of H2/CO ratio and N2/CO2 dilution rate on laminar burning velocity of syngas investigated by direct measurement and simulation  

Science Journals Connector (OSTI)

Abstract Laminar burning velocities of syngas/air premixed flames, varying with H2/CO ratio (from 5/95 to 75/25) and N2 or CO2 dilution rate (from 0% to 60%), were accurately measured using a Teflon coated Heat Flux burner and OH-PLIF based Bunsen flame method. Experiments were carried out at atmospheric pressure and room temperature, with fuel/air equivalence ratios ranging from fuel-lean to fuel-rich. Coupled with experimental data, three chemical kinetic mechanisms, namely GRI-Mech 3.0, USC Mech II and Davis H2–CO mechanism, were validated. The Davis H2–CO and USC Mech II mechanisms appear to provide a better prediction for the laminar burning velocity. The laminar burning velocity variations with H2 and dilution gas contents were systematically investigated. For given dilution gas fraction, the laminar burning velocity reduction rate was enhanced as H2/CO ratio increasing. Effects of the syngas components and equivalence ratio variation on the concentrations of radical H and OH were also studied. It appears that there is a strong linear correlation between the laminar burning velocity and the maximum concentration of the H radical in the reaction zone for syngas. This characteristic is exclusively different from that in methane air premixed flame. These findings indicated that the high thermal diffusivity of the H radical played an important role in the laminar burning velocity enhancement and affected the laminar burning velocity reduction rate under dilution condition.

Z.H. Wang; W.B. Weng; Y. He; Z.S. Li; K.F. Cen

2014-01-01T23:59:59.000Z

411

Spectro-microscopic Measurements of Carbonaceous Aerosol Aging in Central California  

NLE Websites -- All DOE Office Websites (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

412

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

NLE Websites -- All DOE Office Websites (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

413

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

SciTech Connect

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

414

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

SciTech Connect

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

415

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

SciTech Connect

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

416

Visible Light-Driven Water Oxidation by Ir oxide Clusters Coupledto Single Cr Centers in Mesoporous Silica  

SciTech Connect

Visible light-induced water oxidation has been demonstrated at an Ir oxide nanocluster coupled to a single Cr{sup VI} site on the pore surface of MCM-41 mesoporous silica. The photocatalytic unit was assembled by the reaction of surface Cr=O groups with Ir(acac){sub 3} precursor followed by calcination at 300 C and bond formation monitored by FT-Raman and FT-IR spectroscopy. High-resolution Z-contrast electron micrographs of the calcined material combined with energy-dispersive X-ray spot analysis confirmed the occlusion of Ir oxide nanoparticles inside the mesopores. Oxygen evolution of an aqueous suspension of the Ir{sub x}O{sub y}-CrMCM-41 upon visible light irradiation of the Cr{sup VI}-O ligand-to-metal charge-transfer absorption was monitored mass-spectrometrically. Comparison of the product yields for samples with low Cr content (Cr/Si {le} 0.02) and high Cr content (Cr/Si = 0.05) indicates that only isolated Cr centers are capable of extracting electrons from Ir oxide clusters, while di- or polychromate species are not. Water oxidation at a multielectron-transfer catalyst coupled to a single metal center has not been demonstrated before. The ability to drive water oxidation with a single metal center as electron pump offers opportunities for coupling the oxygen-evolving photocatalytic unit to reducing sites in the nanoporous scaffold.

Nakamura, Ryuhei; Frei, Heinz

2006-07-10T23:59:59.000Z

417

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

418

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

419

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

SciTech Connect

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

420

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

Note: This page contains sample records for the topic "ir microscope n2" 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

Properties of transition metal-doped zinc chalcogenide crystals for tunable IR laser radiation  

SciTech Connect

The spectroscopic properties of Cr{sup 2+}, Co{sup 2+}, and Ni{sup 2+}-doped single crystals of ZnS, ZnSe, and ZnTe have been investigated to understand their potential application as mid-IR tunable solid-state laser media. The spectroscopy indicated divalent Cr was the most favorable candidate for efficient room temperature lasing, and accordingly, a laser-pumped laser demonstration of Cr:ZnS and Cr:ZnSe has been performed. The lasers` output were peaked at {approximately} 2.35 {mu}m and the highest measured slope efficiencies were {approximately} 20% in both cases.

DeLoach, L.D.; Page, R.H.; Wilke, G.D. [and others

1995-03-17T23:59:59.000Z

422

Bismuth-doped optical fibres: A new breakthrough in near-IR lasing media  

SciTech Connect

Recent results demonstrate that bismuth-doped optical fibres have considerable potential as near-IR active lasing media. This paper examines bismuth-doped fibres intended for the fabrication of fibre lasers and optical amplifiers and reviews recent results on the luminescence properties of various types of bismuth-doped fibres and the performance of bismuth-doped fibre lasers and optical amplifiers for the spectral range 1150 - 1550 nm. Problems are discussed that have yet to be solved in order to improve the efficiency of the bismuth lasers and optical amplifiers. (optical fibres, lasers and amplifiers. properties and applications)

Dianov, Evgenii M [Fiber Optics Research Center, Russian Academy of Sciences, Moscow (Russian Federation)

2012-09-30T23:59:59.000Z

423

Observations of the 6 Centimeter Lines of OH in Evolved (OH/IR) Stars  

E-Print Network (OSTI)

Recent observational and theoretical advances have called into question traditional OH maser pumping models in evolved (OH/IR) stars. The detection of excited-state OH lines would provide additional constraints to discriminate amongst these theoretical models. In this Letter, we report on VLA observations of the 4750 MHz and 4765 MHz lines of OH toward 45 sources, mostly evolved stars. We detect 4765 MHz emission in the star forming regions Mon R2 and LDN 1084, but we do not detect excited-state emission in any evolved stars. The flux density and velocity of the 4765 MHz detection in Mon R2 suggests that a new flaring event has begun.

Vincent L. Fish; Laura K. Zschaechner; Loránt O. Sjouwerman; Ylva M. Pihlström; Mark J. Claussen

2006-10-24T23:59:59.000Z

424

Born–Oppenheimer breakdown and non-adiabatic lifetimes of rovibrational levels of D2 lying near the n = 2 dissociation limit: Experiment and theory  

Science Journals Connector (OSTI)

The singlet gerade states of the hydrogen molecule are strongly affected by the breakdown of the Born–Oppenheimer approximation. This leads to strong non-adiabatic coupling resulting in large changes of the energies and lifetimes of the quantum levels compared to the values obtained in the Born–Oppenheimer or even the adiabatic levels of approximation. The non-adiabatic calculations of Quadrelli, Dressler, and Wolniewicz (1990) [7] (hereinafter QDW) for the three highest vibrational levels (? = 44, 45, and 46) of the EF 1?g+ state of D2 predicted an enormous increase of the lifetimes upon excitation of just one quantum of rotational motion. However, although our experimental results for these levels just below the n = 2 dissociation limit do show a strong increase in lifetime, the non-adiabatic lifetimes calculated by QDW are longer than experiment by as much as three orders of magnitude. In their work on isotopomers of hydrogen QDW and Yu and Dressler (1994) [5] published extensive summary tables of ab initio non-adiabatic coupling data. We present a technique which allows us to use their summary data to calculate approximate non-adiabatic ab initio lifetimes. The results reconcile our observed lifetimes with the non-adiabatic coupling from those previous ab initio calculations and also provide a detailed quantitative and qualitative understanding of the unusual rotational dependence of the lifetimes of these very highly excited levels. We also test the current technique by calculating the lifetimes of other levels involved in interactions with these EF levels and by calculating the lifetimes of the EF ? = 33 level of H2, for which no corresponding level exists in the Born–Oppenheimer or adiabatic approximations.

Stephen C. Ross; Koichi Tsukiyama

2011-01-01T23:59:59.000Z

425

Structural and electronic properties of Au{sub n?x}Pt{sub x} (n = 2–14; x ? n) clusters: The density functional theory investigation  

SciTech Connect

The structural evolutions and electronic properties of bimetallic Au{sub n–x}Pt{sub x} (n = 2–14; x ? n) clusters are investigated by using the density functional theory (DFT) with the generalized gradient approximation (GGA). The monatomic doping Au{sub n–1}Pt clusters are emphasized and compared with the corresponding pristine Au{sub n} clusters. The results reveal that the planar configurations are favored for both Au{sub n–1}Pt and Au{sub n} clusters with size up to n = 13, and the former often employ the substitution patterns based on the structures of the latter. The most stable clusters are Au{sub 6} and Au{sub 6}Pt, which adopt regular planar triangle (D{sub 3h}) and hexagon-ring (D{sub 6h}) structures and can be regarded as the preferential building units in designing large clusters. For Pt-rich bimetallic clusters, their structures can be obtained from the substitution of Pt atoms by Au atoms from the Pt{sub n} structures, where Pt atoms assemble together and occupy the center yet Au atoms prefer the apex positions showing a segregation effect. With respect to pristine Au clusters, Au{sub n}Pt clusters exhibit somewhat weaker and less pronounced odd-even oscillations in the highest occupied and lowest unoccupied molecular-orbital gaps (HOMO-LUMO gap), electron affinity (EA), and ionization potential (IP) due to the partially released electron pairing effect. The analyses of electronic structure indicate that Pt atoms in AuPt clusters would delocalize their one 6s and one 5d electrons to contribute the electronic shell closure. The sp-d hybridizations as well as the d-d interactions between the host Au and dopant Pt atoms result in the enhanced stabilities of AuPt clusters.

Yuan, H. K.; Kuang, A. L.; Tian, C. L.; Chen, H., E-mail: chenh@swu.edu.cn [School of Physical Science and Technology, Southwest University, Chongqing, 400715 (China)

2014-03-15T23:59:59.000Z

426

Probing IrTe2 crystal symmetry by polarized Raman scattering  

Science Journals Connector (OSTI)

Polarized Raman scattering measurements on IrTe2 single crystals carried out over the 15–640 K temperature range, and across the structural phase transition, reveal different insights regarding the crystal symmetry. In the high temperature regime three Raman active modes are observed at all of the studied temperatures above the structural phase transition, rather than two as predicted by the factor group analysis for the assumed P3Żm1 symmetry. This indicates that the actual symmetry of the high temperature phase is lower than previously thought. The observation of an additional Eg mode at high temperature can be explained by doubling of the original trigonal unit cell along the c axis and within the P3Żc1 symmetry. In the low temperature regime (below 245 K) the other Raman modes appear as a consequence of the symmetry lowering phase transition and the corresponding increase of the primitive cell. All of the modes observed below the phase transition temperature can be assigned within the monoclinic crystal symmetry. The temperature dependence of the Raman active phonons in both phases is mainly driven by anharmonicity effects. The results call for reconsideration of the crystallographic phases of IrTe2.

N. Lazarevi?; E. S. Bozin; M. Š?epanovi?; M. Opa?i?; Hechang Lei (???); C. Petrovic; Z. V. Popovi?

2014-06-16T23:59:59.000Z

427

A SPITZER IRS SURVEY OF NGC 1333: INSIGHTS INTO DISK EVOLUTION FROM A VERY YOUNG CLUSTER  

SciTech Connect

We report on the {lambda} = 5-36 {mu}m Spitzer Infrared Spectrograph (IRS) spectra of 79 young stellar objects in the very young nearby cluster NGC 1333. NGC 1333's youth enables the study of early protoplanetary disk properties, such as the degree of settling and the formation of gaps and clearings. We construct spectral energy distributions (SEDs) using our IRS data as well as published photometry and classify our sample into SED classes. Using 'extinction-free' spectral indices, we determine whether the disk, envelope, or photosphere dominates the spectrum. We analyze the dereddened spectra of objects that show disk-dominated emission using spectral indices and properties of silicate features in order to study the vertical and radial structure of protoplanetary disks in NGC 1333. At least nine objects in our sample of NGC 1333 show signs of large (several AU) radial gaps or clearings in their inner disk. Disks with radial gaps in NGC 1333 show more nearly pristine silicate dust than their radially continuous counterparts. We compare properties of disks in NGC 1333 to those in three other well-studied regions, Taurus-Auriga, Ophiuchus, and Chamaeleon I, and find no difference in their degree of sedimentation and dust processing.

Arnold, L. A.; Watson, Dan M.; Kim, K. H.; Manoj, P.; Remming, I.; Sheehan, P.; Forrest, W. J.; Mamajek, E. [Department of Physics and Astronomy, University of Rochester, Rochester, NY 14627 (United States); Adame, L.; McClure, M. [Department of Astronomy, University of Michigan, 500 Church Street, Dennison Building, Ann Arbor, MI 48109 (United States); Furlan, E. [Jet Propulsion Laboratory, California Institute of Technology, Mail Stop 264-723, 4800 Oak Grove Drive, Pasadena, CA 91109 (United States); Espaillat, C. [Harvard-Smithsonian Center for Astrophysics, 60 Garden Street, MS-78, Cambridge, MA 02138 (United States); Ausfeld, K.; Rapson, V. A., E-mail: laa@pas.rochester.edu, E-mail: dmw@pas.rochester.edu [Center for Imaging Science, Rochester Institute of Technology, 54 Lomb Memorial Drive, Rochester, NY 14623 (United States)

2012-08-01T23:59:59.000Z

428

Laser separation of nitrogen isotopes by the IR+UV dissociation of ammonia molecules  

SciTech Connect

The separation of nitrogen isotopes is studied upon successive single-photon IR excitation and UV dissociation of ammonia molecules. The excitation selectivity was provided by tuning a CO{sub 2} laser to resonance with {sup 14}NH{sub 3} molecules [the 9R(30) laser line] or with {sup 15}NH{sub 3} molecules [the 9R(10) laser line]. Isotopic mixtures containing 4.8% and 0.37% (natural content) of the {sup 15}NH isotope were investigated. The dependences of the selectivity and the dissociation yield for each isotopic component on the buffer gas pressure (N{sub 2}, O{sub 2}, Ar) and the ammonia pressure were obtained. In the limit of low NH{sub 3} pressures (0.5-2 Torr), the dissociation selectivity {alpha}(15/14) for {sup 15}N was 17. The selectivity mechanism of the IR+UV dissociation is discussed and the outlook is considered for the development of the nitrogen isotope separation process based on this approach. (laser isotope separation)

Apatin, V M; Klimin, S A; Laptev, V B; Lokhman, V N; Ogurok, D D; Pigul'skii, S V; Ryabov, E A [Institute of Spectroscopy, Russian Academy of Sciences, Troitsk, Moscow region (Russian Federation)

2008-08-31T23:59:59.000Z

429

OH/IR stars and their superwinds as observed by the Herschel Space Observatory  

E-Print Network (OSTI)

Aim : In order to study the history of mass loss in extreme OH/IR stars, we observed a number of these objects using CO as a tracer of the density and temperature structure of their circumstellar envelopes. Method : Combining CO observations from the Herschel Space Observatory with those from the ground, we trace mass loss rates as a function of radius in five extreme OH/IR stars. Using radiative transfer modelling, we modelled the dusty envelope as well as the CO emission. The high-rotational transitions of CO indicate that they originate in a dense superwind region close to the star while the lower transitions tend to come from a more tenuous outer wind which is a result of the mass loss since the early AGB phase. Result : The models of the circumstellar envelopes around these stars suggest that they have entered a superwind phase in the past 200 - 500 years. The low 18O/17O (~ 0.1 compared to the solar abundance ratio of ~ 5) and 12C/13C (3-30 cf. the solar value of 89) ratios derived from our study suppor...

Justtanont, K; Barlow, M J; Matsuura, M; Swinyard, B; Waters, L B F M; Yates, J

2013-01-01T23:59:59.000Z

430

Using Optical and Near-IR Photometry to Test MACHO Lens Candidates  

E-Print Network (OSTI)

We obtained new VLT/ISAAC H-band observations for five MACHO LMC source stars and adjacent LMC field regions. After combining our near-IR photometry with HST/PC BVRI optical photometry, we compared the MACHO objects to the adjacent field stars in a variety of color-magnitude and color-color diagrams. These diagnostic diagrams were chosen to be sensitive to our hypothesis that at least some of the MACHO lenses were foreground Galactic disk or thick disk M dwarfs. For the five lensed objects we studied, our hypothesis could be ruled out for main sequence lens masses >= 0.1 Mo for distances out to 4 kpc. On the other hand, the fact that LMC-MACHO-5, an object not in our study, has been recently found to have just such a foreground lens, highlights that the remainder of the LMC MACHO objects should be searched for the signature of their lenses using our photometric technique, or via near-IR spectroscopy. We also constructed diagnostic color-color diagrams sensitive to determining reddening for the individual MACHO source stars and found that these five objects did not show evidence for significant additional reddening. At least these five MACHO objects are thus also inconsistent with the LMC self-lensing hypothesis.

Ted von Hippel; Ata Sarajedini; Maria Teresa Ruiz

2003-07-24T23:59:59.000Z

431

Ab initio Structure Determination of Mg10Ir19B16  

SciTech Connect

The ab initio structure determination of a novel unconventional noncentro-symmetric superconductor Mg{sub 10}Ir{sub 19}B{sub 16} (T{sub c} = 5 K) has been performed using a method that involves a combination of experimental data and calculations. Electron diffraction, X-ray powder diffraction, phase estimation routines, quantum mechanical calculations, high-resolution electron microscopy, and structural chemistry arguments are used. With the strengths of different methods used to eliminate the ambiguities encountered in others, the complete structure, including a very light B atom, has been determined with a high accuracy from impure polycrystalline powder samples, which suggests that the type of analysis described may be used to successfully address other similar intractable problems. The solved structure of Mg{sub 10}Ir{sub 19}B{sub 16} shows a complex nature that irregular coordination environments preclude a conversional description of compact packing of coordination polyhedra; however, it can be easier understood as ordered in an onion-skin-like series of nested polyhedra.

Xu, Qiang [Delft University of Technology, Delft, Netherlands; Klimczuk, T. [Princeton University; Gortenmulder, T. [Universitate Amsterdam; Jansen, J. [Delft University of Technology, Delft, Netherlands; McGuire, Michael A [ORNL; Cava, R. J. [Princeton University; Zandbergen, H [Delft University of Technology, Delft, Netherlands

2009-01-01T23:59:59.000Z

432

"Dust, Ice, and Gas In Time" (DIGIT) Herschel Observations of GSS30-IRS1 in Ophiuchus  

E-Print Network (OSTI)

As a part of the "Dust, Ice, and Gas In Time" (DIGIT) key program on Herschel, we observed GSS30-IRS1, a Class I protostar located in Ophiuchus (d = 120 pc), with Herschel/Photodetector Array Camera and Spectrometer (PACS). More than 70 lines were detected within a wavelength range from 50 micron to 200 micron, including CO, H2O, OH, and two atomic [O I] lines at 63 and 145 micron. The [C II] line, known as a tracer of externally heated gas by the interstellar radiation field, is also detected at 158 micron. All lines, except [O I] and [C II], are detected only at the central spaxel of 9.4" X 9.4". The [O I] emissions are extended along a NE-SW orientation, and the [C II] line is detected over all spaxels, indicative of external PDR. The total [C II] intensity around GSS30 reveals that the far-ultraviolet radiation field is in the range of 3 to 20 G0, where G0 is in units of the Habing Field, 1.6 X 10^{-3} erg cm^{-2} s^{-1}. This enhanced external radiation field heats the envelope of GSS30-IRS1, causing the...

Je, Hyerin; Lee, Seokho; Green, Joel D; Evans, Neal J

2015-01-01T23:59:59.000Z

433

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

SciTech Connect

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

434

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

435

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

436

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

437

Impact of IrRu Oxygen Evolution Reaction Catalysts on Pt Nanostructured Thin Films under Start-Up/Shutdown Cycling  

SciTech Connect

Electron microscopy and X-ray photoelectron spectroscopy (XPS) methods have been utilized to study the role of oxygen evolution reaction (OER) catalysts in mitigating degradation arising from start-up/shutdown events. Pt nanostructured thin films (NSTF) were coated with a Ru0.1Ir0.9 OER catalyst at loadings ranging from 1 to 10 g/cm2 and submitted to 5,000 potential cycles within a membrane electrode assembly. Analysis of the as-deposited catalyst showed that Ir and Ru coating is primarily metallic, and further evidence is provided to support the previously reported interaction between Ru and the perylene-red support. Aberration-corrected scanning transmission electron microscopy and energy dispersive X-ray spectroscopy were used to observe the impact of the OER catalysts on Pt dissolution and migration through the membrane. Elemental mapping showed a high percentage of the Ir catalyst was maintained on the NSTF whisker surfaces following testing. The presence of the OER catalysts greatly reduced the smoothing of the Pt NSTF whiskers, which has been correlated with Pt dissolution and losses in electrochemically active surface area. The dissolution of both Ir and Pt led to the formation of IrPt nanoparticle clusters in the membrane close to the cathode, as well as the formation of a Pt band deeper in the membrane.

Cullen, David A [ORNL; More, Karren Leslie [ORNL; Atanasoska, Liliana [3M, Industrial Mineral Products Division; Atanasoski, Radoslav [3M, Industrial Mineral Products Division

2014-01-01T23:59:59.000Z

438

Intramolecular electron transfer in mixed-valence complexes [(NH3)5Ru-L-Ru(NH3)5]5+ (L = N2, pyz, pym, 4,4?-bipy, bpa)  

Science Journals Connector (OSTI)

The dynamics of the intramolecular electron transfer from Ru(II) to Ru(III) in binuclear mixedvalence complexes [(NH3)5Ru-L- Ru(NH3)5]5+ (L = N2,pyz, bipy, pym, bpa) is analyzed by the semiempirical CINDO +...

O. V. Sizova; V. I. Baranovskii; A. I. Panin…

439

Intramolecular electron transfer in mixed-valence complexes [(NH3)5Ru-L-Ru(NH3)5]5+ (L = N2, pyz, pym, 4,4’-bipy, bpa)  

Science Journals Connector (OSTI)

The dynamics of the intramolecular electron transfer from Ru(II) to Ru(III) in binuclear mixed-valence complexes [NH3)5Ru -L-Ru(NH3)5]5+ (L = N2, pyz, bipy, pym, bpa) is analyzed by the semiempiri...

O. V. Sizova; V. I. Baranovskii; A. I. Panin…

2002-02-01T23:59:59.000Z

440

Spectro-Microscopic Measurements of Carbonaceous Aerosol Aging in Central California  

SciTech Connect

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

Note: This page contains sample records for the topic "ir microscope n2" 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

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

442

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

443

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

444

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

445

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

446

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

447

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

SciTech Connect

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

448

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

449

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

450

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

451

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

452

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

453

Dilute magnetism and spin-orbital percolation effects in Sr2Ir1?xRhxO4  

Science Journals Connector (OSTI)

We have used a combination of resonant magnetic x-ray scattering and x-ray absorption spectroscopy to investigate the properties of the doped spin-orbital Mott insulator Sr2Ir1?xRhxO4 (0.07?x?0.70). We show that Sr2Ir1?xRhxO4 represents a unique model system for the study of dilute magnetism in the presence of strong spin-orbit coupling, and provide evidence of a doping-induced change in magnetic structure and a suppression of magnetic order at xc?0.17. We demonstrate that Rh-doping introduces Rh3+/Ir5+ ions which effectively hole-dope this material. We propose that the magnetic phase diagram for this material can be understood in terms of a novel spin-orbital percolation picture.

J. P. Clancy; A. Lupascu; H. Gretarsson; Z. Islam; Y. F. Hu; D. Casa; C. S. Nelson; S. C. LaMarra; G. Cao; Young-June Kim

2014-02-10T23:59:59.000Z

454

In Situ Real-Time Diffuse Reflection Infrared Fourier Transform Spectroscopy (DRIFTS) Study of Hydrogen Adsorption and Desorption on Ir/SiO2 Catalyst  

Science Journals Connector (OSTI)

The adsorption and desorption of hydrogen on Ir/SiO2 catalyst were studied by using in situ diffuse reflection infrared Fourier transform spectroscopy (DRIFTS) combined with...

Hu, Gengshen; Zhu, Lin; Jia, Aiping; Hu, Xin; Xie, Guanqun; Lu, Jiqing; Luo, Mengfei

2012-01-01T23:59:59.000Z

455

Microsoft Word - PSEG Companies Comments in OE Docket No RRTT-IR-001.doc  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

K. Richter K. Richter Assistant General Regulatory Counsel Regulatory Department 80 Park Plaza, T5C, Newark, NJ 07102-4194 tel: 973.430.6451 fax: 973.802.1267 email: david.richter@pseg.com March 28, 2012 VIA ELECTRONIC FILING Lamont Jackson Office of Electricity Delivery and Energy Reliability Mail Code OE-20 U.S. Department of Energy, 1000 Independence Avenue, SW. Washington, DC 20585 RE: DOE's Request for Information OE Docket No. RRTT-IR-001 Dear Mr. Jackson, Public Service Electric and Gas Company ("PSE&G") 1 , PSEG Power LLC ("PSEG Power") and PSEG Energy Resources & Trade LLC ("PSEG ER&T") (collectively referred to herein as the "PSEG Companies") respectfully submit the following comments in response to the Department of Energy's ("DOE") Request for

456

Microsoft Word - Cover letter to RRTT-IR-001 Comments.doc  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

8, 2012 8, 2012 via electronic mail to: Lamont.Jackson@hq.doe.gov Lamont Jackson Office of Electricity Delivery and Energy Reliability Mail Code: OE-20 U.S. Department of Energy 1000 Independence Avenue S.W. Washington, D.C. 20585 Re: Rapid Response Team for Transmission OE Docket No. RRTT-IR-001 Dear Mr. Jackson: Pursuant to the Department of Energy Office of Electricity Delivery and Energy Reliability's February 21, 2012 Request for Information in the above-referenced docket, attached please find American Electric Power's comments. Respectfully submitted, /s/ Amanda Riggs Conner Amanda Riggs Conner American Electric Power Service Corporation 801 Pennsylvania Ave, N.W. Suite 320 Washington, DC 20004 Telephone: (202) 383-3436

457

Finite-size scaling in thin Fe/Ir(100) layers  

E-Print Network (OSTI)

The critical temperature of thin Fe layers on Ir(100) is measured through M\\"o{\\ss}bauer spectroscopy as a function of the layer thickness. From a phenomenological finite-size scaling analysis, we find an effective shift exponent lambda = 3.15 +/- 0.15, which is twice as large as the value expected from the conventional finite-size scaling prediction lambda=1/nu, where nu is the correlation length critical exponent. Taking corrections to finite-size scaling into account, we derive the effective shift exponent lambda=(1+2\\Delta_1)/nu, where Delta_1 describes the leading corrections to scaling. For the 3D Heisenberg universality class, this leads to lambda = 3.0 +/- 0.1, in agreement with the experimental data. Earlier data by Ambrose and Chien on the effective shift exponent in CoO films are also explained.

Malte Henkel; Stéphane Andrieu; Philippe Bauer; Michel Piecuch

1998-04-18T23:59:59.000Z

458

Structural, magnetic, and electrical properties of Li2Ir1?xRuxO3  

Science Journals Connector (OSTI)

The crystal structure, resistivity, and magnetic susceptibility of the Li2Ir1?xRuxO3 (x=0–1) polycrystals have been investigated. We found that the parent antiferromagnetic phase disappears for x>0.2 and bond dimers appear in the averaged structure for x>0.5 and likely fluctuate for much smaller x. Unexpectedly, this system remains insulating for all the doping levels, contrary to the predictions based on the one-band jeff=1/2 Kitaev-Heisenberg model. These results suggest that the honeycomb iridates doped with ruthenium are a unique 5d-orbital-based platform for studying the interplay of the charge, orbital, spin, and lattice degrees of freedom.

Hechang Lei (???); Wei-Guo Yin (???); Zhicheng Zhong (???); Hideo Hosono

2014-01-31T23:59:59.000Z

459

The Neon Abundance in the Ejecta of QU Vul From Late-Epoch IR Spectra  

E-Print Network (OSTI)

We present ground-based SpectroCam-10 mid-infrared, MMT optical, and Spitzer Space Telescope IRS mid-infrared spectra taken 7.62, 18.75, and 19.38 years respectively after the outburst of the old classical nova QU Vulpeculae (Nova Vul 1984 #2). The spectra of the ejecta are dominated by forbidden line emission from neon and oxygen. Our analysis shows that neon was, at the first and last epochs respectively, more than 76 and 168 times overabundant by number with respect to hydrogen compared to the solar value. These high lower limits to the neon abundance confirm that QU Vul involved a thermonuclear runaway on an ONeMg white dwarf and approach the yields predicted by models of the nucleosynthesis in such events.

Robert D. Gehrz; Charles E. Woodward; L. Andrew Helton; Elisha F. Polomski; Thomas L. Hayward; James R. Houck; A. Evans; Joachim Krautter; Steven N. Shore; Sumner Starrfield; James Truran; G. J. Schwarz; R. Mark Wagner

2007-09-17T23:59:59.000Z

460

Study by IR-spectroscopy and adsorption of platinum-alumina catalysts modified by manganese  

SciTech Connect

Additions of Re are widely employed for modifying platinum-alumina catalysts (PAC). The effect of Mn on the catalysis of and the physicochemical properties of PAC has been less studied. It is only known that adding <0.2 wt. % Mn has no effect on the dispersity of the Pt crystallites. In this work the authors have studied the state of Pt in unmodified PAC by IR spectroscopy of adsorbed CO and by the adsorption of H/sub 2/ at elevated temperatures. The state of the metallic platinum in platinum-alumina catalysts modified by Mn is more heterogeneous than in the unmodified sample. When manganese is added, platinum crystallites with stronger electron-donor properties form on the surface of the catalyst. In platinum-alumina catalysts modified by manganese, there is an increase in the number of sites for the high-temperature dissociative adsorption of hydrogen located on the surface of the Mn-modified carrier.

Zaitsev, A.V.; Barkova, A.P.; Borovkov, B.Yu.; Sterligov, O.D.; Isagulyants, G.V.; Kazanskii, V.B.

1987-03-10T23:59:59.000Z

Note: This page contains sample records for the topic "ir microscope n2" 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

Properties of polyacetylene doped with I, Br, IrCl6, and FeCl3  

Science Journals Connector (OSTI)

We have studied the temperature dependence of the resistivity of polyacetylene doped with I, Br, IrCl6, and FeCl3. The roles of dopant molecule size, doping technique, doping speed, and isomerization state in determining the mechanism of electrical conduction are discussed. Evidence for dopant-induced disorder is presented from x-ray and high-resolution transmission electron microscopy studies. We suggest that the dopant molecule size determines whether the dopant is dispersed molecularly or whether the dopant molecules aggregate. In addition, we find significant differences in the activation energy, kBT0, between CH(Br)y and CH(I)y, although the characteristic temperature dependence of the resistivity is the same.

E. K. Sichel; M. F. Rubner; S. K. Tripathy

1982-12-15T23:59:59.000Z

462

Al-doped ZnO powdered materials: Al solubility limit and IR absorption properties  

Science Journals Connector (OSTI)

Al-doped ZnO powder was synthesized via the Pechini route with a doping rate varying from 1 to 4 mol.%. A solubility limit has been estimated under 0.3 mol.% of Al using X-ray diffraction refinements. The incorporation of aluminium into the ZnO lattice was investigated by 27Al NMR, which suggests an extremely low amount of Al in a distribution of sites in ZnO. In order to assess the impact of such a low dopant amount, diffuse reflection experiments were performed for a wavelength range from 200 to 2500 nm. If the effect of doping was negligible for samples prepared at 850 °C, annealing at 1200 °C clearly reveals enhanced IR absorption properties for the doped samples, which are similar whatever be the nominal Al content.

Hélčne Serier; Manuel Gaudon; Michel Ménétrier

2009-01-01T23:59:59.000Z

463

Solar system constraints on asymptotically flat IR modified Horava gravity through light deflection  

E-Print Network (OSTI)

In this paper, we study the motion of photons around a Kehagias-Sfetsos (KS) black hole and obtain constraints on IR modified Ho$\\check{r}$ava gravity without cosmological constant ($\\sim \\Lambda_{W}$). An analytic formula for the light deflection angle is obtained. For a propagating photon, the deflection angle $\\delta \\phi$ increases with large values of the Ho$\\check{r}$ava gravity parameter $\\omega$. Under the UV limit $\\omega \\longrightarrow \\infty$, deflection angle reduces to the result of usual Schwarzschild case, $4GM/R$. It is also found that with increasing scale of astronomical observation system the Ho$\\check{r}$ava-Lifshitz gravity should satisfy $|\\omega M^2|>1.1725 \\times10^{-16}$ with 12% precision for Earth system, $|\\omega M^2| > 8.27649 \\times 10^{-17}$ with 17% precision for Jupiter system and $|\\omega M^2| > 8.27650\\times 10^{-15}$ with 0.17% precision for solar system.

Molin Liu; Junwang Lu; Benhai Yu; Jianbo Lu

2010-11-15T23:59:59.000Z

464

Effect of Field Errors in Muon Collider IR Magnets on Beam Dynamics  

SciTech Connect

In order to achieve peak luminosity of a Muon Collider (MC) in the 10{sup 35} cm{sup -2}s{sup -1} range very small values of beta-function at the interaction point (IP) are necessary ({beta}* {le} 1 cm) while the distance from IP to the first quadrupole can not be made shorter than {approx}6 m as dictated by the necessity of detector protection from backgrounds. In the result the beta-function at the final focus quadrupoles can reach 100 km making beam dynamics very sensitive to all kind of errors. In the present report we consider the effects on momentum acceptance and dynamic aperture of multipole field errors in the body of IR dipoles as well as of fringe-fields in both dipoles and quadrupoles in the ase of 1.5 TeV (c.o.m.) MC. Analysis shows these effects to be strong but correctable with dedicated multipole correctors.

Alexahin, Y.; Gianfelice-Wendt, E.; Kapin, V.V.; /Fermilab

2012-05-01T23:59:59.000Z

465

Express quality analysis of coal concentrates by diffuse reflection IR spectroscopy  

SciTech Connect

Ongoing quality monitoring of coal concentrates is important today on account of instability in the raw materials for coking at OAO Magnitogorskii Metallurgicheskii Kombinat (MMK) and the variable composition of the coal batch for enrichment plants. Currently, numerous standardized methods permit the determination of the classificational and quality characteristics of coal and batch. These methods are slow, laborious, and relatively ineffective in industrial conditions. In May 2005, an automated Spektrotest express-analysis system developed by ECCI was installed in the coke laboratory at ZAO RMK in order to determine the quality of the coal concentrate and batch. The basic equipment is an IR spectrometer with a unit for Fourier transformation and a special optical module yielding the reflect on spectra of the pulverized coal. A control station based on a high-speed computer runs an algorithm for information analysis and storage and for printing out the test protocol. The Spektrotest system includes complex algorithms and software specially developed at ECCI.

V.N. Egorov; I.I. Mel'nikov; N.A. Tarasov; V.I. Butakova; Y.M. Posokhov [ZAO RMK (Russian Federation)

2007-07-01T23:59:59.000Z

466

Fuel Cell Manufacturing Diagnostic Techniques: IR Thermography with Reactive Flow through Excitation  

SciTech Connect

While design and material considerations for PEMFCs have a large impact on cost, it is also necessary to consider a transition to high volume production of fuel cell systems, including MEA components, to enable economies of scale and reduce per unit cost. One of the critical manufacturing tasks is developing and deploying techniques to provide in?process measurement of fuel cell components for quality control. This effort requires a subsidiary task: The study of the effect of manufacturing defects on performance and durability with the objective to establish validated manufacturing tolerances for fuel cell components. This work focuses on the development of a potential quality control method for gas diffusion electrodes (GDEs). The method consists of infrared (IR) thermography combined with reactive flow through (RFT) excitation. Detection of catalyst loading reduction defects in GDE catalyst layers will be presented.

Manak, A. J.; Ulsh, M.; Bender, G.

2012-01-01T23:59:59.000Z

467

Determining Transition State Geometries in Liquids Using 2D-IR  

SciTech Connect

Many properties of chemical reactions are determined by the transition state connecting reactant and product, yet it is difficult to directly obtain any information about these short-lived structures in liquids. We show that two-dimensional infrared (2D-IR) spectroscopy can provide direct information about transition states by tracking the transformation of vibrational modes as a molecule crossed a transition state. We successfully monitored a simple chemical reaction, the fluxional rearrangement of Fe(CO)5, in which the exchange of axial and equatorial CO ligands causes an exchange of vibrational energy between the normal modes of the molecule. This energy transfer provides direct evidence regarding the time scale, transition state, and mechanism of the reaction.

Harris, Charles; Cahoon, James F.; Sawyer, Karma R.; Schlegel, Jacob P.; Harris, Charles B.

2007-12-11T23:59:59.000Z

468

Interaction of mineral surfaces with simple organci molecules by diffuse reflectance IR spectroscopy (DRIFT)  

SciTech Connect

Diffuse reflectance Fourier-transform infrared spectroscopy (DRIFTS) was used to characterize multi-layers of lysine, glutamic acid and salicylic acid on ?-alumina and kaolinite surfaces. The results agreed well with those previously obtained by ATR-IR in aqueous media where available, indicating that DRIFT may be regarded as effectively an in-situ spectroscopy for these materials. In the case of salicylic acid adsorption onto ?-alumina, DRIFTS was used to identify monolayer coverage and to detect molecules down to coverage of 3% of a monolayer. The spectroscopic results as to coverage were confirmed by analysis of the solutions used for treatment. The spectra obtained allowed identification of changes in the bonding environment with increasing surface coverage. DRIFTS, offers several advantages in terms of materials, experimental technique and data treatment, motivating further investigations.

Joan Thomas; Michael Kelley

2007-06-18T23:59:59.000Z

469

Progress of the ITER equatorial vis/IR wide angle viewing system optical design  

SciTech Connect

The equatorial vis/IR wide angle viewing system is present in four ITER diagnostic equatorial ports. This instrument will cover a large field of view with high spatial and temporal resolutions, to provide real time temperature measurements of plasma facing components, spectral data in the visible range, information on runaway electrons, and pellet tracking. This diagnostic needs to be reliable, precise, and long lasting. Its design is driven by both the tokamak severe environment and the high performances required for machine protection. The preliminary design phase is ongoing. Paramount issues are being tackled, relative to wide spectral band optical design, material choice, and optomechanical difficulties due to the limited space available for this instrument in the ports, since many other diagnostics and services are also present. Recent progress of the diagnostic optical design and status of associated R and D are presented.

Davi, M.; Corre, Y.; Guilhem, D.; Jullien, F.; Reichle, R.; Salasca, S.; Travere, J. M. [Association Euratom CEA, CEA/DSM/IRFM, Cadarache, 13108 Saint-Paul-lez-Durance (France); Cal, E. de la; Manzanares, A.; Pablos, J. L. de [Association Euratom CIEMAT, Av. Complutense 22, 28040 Madrid (Spain); Migozzi, J. B. [JBM Optique, 11 Av. de la division Leclerc, 92310 Sevres (France)

2008-10-15T23:59:59.000Z

470

EPR and IR studies of [Ru(NH?)?]ł+-Y and [Ru(NH?)?N?]˛+-Y type zeolites  

E-Print Network (OSTI)

EPR AND IR STUDIES OF [Ru(NH ) ] -Y 3 6 AND [Ru(NE ) N ] -Y TYPE ZEOLITES 2+ A Thesis by RAYMOND LEON LEUBNER Submitted to the Graduate College of Texas A&M University in partia1 fulfillment of the requirement for the degree of MASTER... OF SCIENCE December 1973 Major Subject: Chemistry EPR AND IR STUDIES OF [Ru(NH3) ] -Y 3+ AND [Ru(NH3) N ) -Y TYPE ZEOLITES 2+ 3&2 A Thesis by RAYMOND LEON LEUBNER Approved as to style and content by: (Chairman of Committ (Head of Department) (Memb...

Leubner, Raymond Leon

2012-06-07T23:59:59.000Z

471

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

SciTech Connect

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

472

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

473

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

474

Integration of an Atomic Force Microscope in a Beamline Sample Environment  

SciTech Connect

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

475

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

476

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

477

Radiochromic film dosimetry of HDR {sup 192}Ir source radiation fields  

SciTech Connect

Purpose: A radiochromic film based dosimetry system for high dose rate (HDR) Iridium-192 brachytherapy source was described. A comparison between calibration curves established in water and Solid Water was provided. Methods: Pieces of EBT-2 model GAFCHROMIC film were irradiated in both water and Solid Water with HDR {sup 192}Ir brachytherapy source in a dose range from 0 to 50 Gy. Responses of EBT-2 GAFCHROMIC film were compared for irradiations in water and Solid Water by scaling the dose between media through Monte Carlo calculated conversion factor for both setups. To decrease uncertainty in dose delivery due to positioning of the film piece with respect to the radiation source, traceable calibration irradiations were performed in a parallel-opposed beam setup. Results: The EBT-2 GAFCHROMIC film based dosimetry system described in this work can provide an overall one-sigma dose uncertainty of 4.12% for doses above 1 Gy. The ratio of dose delivered to the sensitive layer of the film in water to the dose delivered to the sensitive layer of the film in Solid Water was calculated using Monte Carlo simulations to be 0.9941 {+-} 0.0007. Conclusions: A radiochromic film based dosimetry system using only the green color channel of a flatbed document scanner showed superior precision if used alone in a dose range that extends up to 50 Gy, which greatly decreases the complexity of work. In addition, Solid Water material was shown to be a viable alternative to water in performing radiochromic film based dosimetry with HDR {sup 192}Ir brachytherapy sources.

Aldelaijan, Saad; Mohammed, Huriyyah; Tomic, Nada; Liang Liheng; DeBlois, Francois; Sarfehnia, Arman; Abdel-Rahman, Wamied; Seuntjens, Jan; Devic, Slobodan [Medical Physics Unit, McGill University, Department of Radiation Oncology, SMBD Jewish General Hospital, McGill University, Montreal, Quebec H3T 1E2 (Canada); Medical Physics Unit, McGill University, Montreal, Quebec H3G 1A4 (Canada); Medical Physics Unit, McGill University, Department of Radiation Oncology, SMBD Jewish General Hospital, McGill University, Montreal, Quebec H3T 1E2 (Canada)

2011-11-15T23:59:59.000Z

478

Faraday Discuss., 1994,97,35-41 Far-IR Vibration-Rotation-Tunnelling Spectroscopy of the  

E-Print Network (OSTI)

. The theoretical equi- librium geometry of the water trimer is a hydrogen-bonded ring in which each water acts' is accomplished by rotating one water monomer (shaded) about its donated hydrogen bond. The pathway connectsFaraday Discuss., 1994,97,35-41 Far-IR Vibration-Rotation-Tunnelling Spectroscopy of the Water

Cohen, Ronald C.

479

Conformational Switching between Protein Substates Studied with 2D IR Vibrational Echo Spectroscopy and Molecular Dynamics Simulations  

E-Print Network (OSTI)

Conformational Switching between Protein Substates Studied with 2D IR Vibrational Echo Spectroscopy. Three conformational substates have been identified for the carbonmonoxy form of myoglobin (Mb vibrational echo chemical exchange experiments are used to observed switching between two of these substates

Fayer, Michael D.

480

Free Tax Filing! VITA is a free program sponsored by the IRS which can prepare simple or low  

E-Print Network (OSTI)

Free Tax Filing! VITA is a free program sponsored by the IRS which can prepare simple or low income (under $58,000 per household) tax returns for FREE! Free tax filing starts on February 27th and ends our free tax filing events, please call 657-278-8681 or email csufvita@gmail.com to verify that you

de Lijser, Peter

Note: This page contains sample records for the topic "ir microscope n2" 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

PRO: Professional Record Online G:\\IR\\PRO\\Implementation Plan\\SC\\PRO Steering Committee Minutes_020312  

E-Print Network (OSTI)

PRO: Professional Record Online G:\\IR\\PRO\\Implementation Plan\\SC\\PRO Steering Committee Minutes in their work. The data entry team searched for photos/videos of music faculty online and found a few about PRO and will use the PRO website user guide and FAQs to respond to questions. Returning

482

Integrating IR and RDBMS Using Cooperative Indexing Samuel DeFazio, Amjad Daoud, Lisa Ann Smith, and Jagannathan Srinivasan  

E-Print Network (OSTI)

integration we mean: i) support for document storage, indexing, retrieval, and update, ii) transaction for the integrated offering to exhibit scaleable performance for document indexing and retrieval processes IR system and a DBMS with the integration mainly occurring in a common interface. In this approach

Callan, Jamie

483

Hydrogen Bond Lifetimes and Energetics for Solute/Solvent Complexes Studied with 2D-IR Vibrational Echo Spectroscopy  

E-Print Network (OSTI)

Hydrogen Bond Lifetimes and Energetics for Solute/Solvent Complexes Studied with 2D-IR Vibrational@stanford.edu Abstract: Weak hydrogen-bonded solute/solvent complexes are studied with ultrafast two the dissociation and formation rates of the hydrogen-bonded complexes. The dissociation rates of the weak hydrogen

Fayer, Michael D.

484

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

485

Hybrid methods for witnessing entanglement in a microscopic-macroscopic system  

SciTech Connect

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

486

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

SciTech Connect

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

487

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

488

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

SciTech Connect

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

489

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

490

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

491

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

492

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

493

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

494

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

495

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

496

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

497

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

498

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

499

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

500

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