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1

Soapbox for the Automobile: Bumper Sticker History, Identification, and Preservation  

E-Print Network [OSTI]

First produced in the late 1940s, the bumper sticker quickly gained prominence in the early 1950s and over the years has served a wide range of purposes—from advertising tourist attractions and promoting public safety to ...

Baker, Whitney

2011-01-01T23:59:59.000Z

2

Modification and final alignment of the TFTR bumper limiter  

SciTech Connect (OSTI)

During the past three Tokamak Fusion Test Reactor (TFTR) vacuum vessel machine openings, an extensive effort was undertaken to optimize the distribution of heating of the bumper limiter tiles. The optimization was achieved by locating the limiter tiles relative to the toroidal magnetic field and adjusting their position relative to the magnetic field rather than to fixed points in the vacuum vessel walls. This paper will discuss the results of these alignments as measured during operation with the limiter thermocouple system and subsequent visual inspection during this past TFTR vacuum vessel opening. During the most recent in-vessel inspection (January 1993), damage to the top and bottom rows of the bumper limiter tiles was noted. More tiles were damaged on the lower row than the upper row. Tiles on the right side of the bottom row and to a lesser extent tiles on the left side of the top row were damaged. The location of the damage corresponds to the plasma power flux direction. Theories explaining the asymmetric damage (bottom versus top) are summarized. Princeton Plasma Physics Laboratory (PPL) began a program to replace 223 of the originally installed tiles made from POCO AFX-5Q graphite. Of these 223 tiles, 151 were replaced with tiles made from carbon-fiber-composite (CFC) and 158 of these tiles were re-designed for installation on the top or bottom rows. The re-designed tiles have a tapered edge that reduces the angle of incidence of the power flux on the edge surface that was over-heating. This paper will review the in-vessel work and discuss the final modification of the TFTR bumper limiter to alleviate further damage at these locations prior to DT operation of TFTR.

McSmith, M.D. [McDonnell Douglas Aerospace, St. Louis, MO (United States); Loesser, G.D.; Owens, D.K. [Princeton Plasma Physics Lab., NJ (United States)

1994-11-01T23:59:59.000Z

3

Experiments to model the rotordynamic behavior of rub rings and bumpers  

E-Print Network [OSTI]

of contact between the rotor elements and static components of these machines will always arise. Therefore, rub rings or rotordynamic bumpers are incorporated to protect hardware, such as seals, compressor blades and bearings by preventing abnormal contact...

Aguilar-Armendariz, Eduardo

2000-01-01T23:59:59.000Z

4

Permeability and wet-out characterization of SRIM automotive bumper beams  

E-Print Network [OSTI]

PERMEABILITY AND WET-OUT CHARACTERIZATION OF SRIM AUTOMOTIVE BUMPER BEAMS A Thesis CHRISTOPHER TODD MORSE 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 1992 Major Subject: Mechanical Engineering PERMEABILITY AND WET-OUT CHARACTERIZATION OF SRIM AUTOMOTIVE BUMPER BEAMS A Thesis by CHRISTOPHER TODD MORSE Submitted to the Office of Graduate Studies of Texas A&M University...

Morse, Christopher Todd

1992-01-01T23:59:59.000Z

5

E-Print Network 3.0 - appendage system continued Sample Search...  

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

Biology and Medicine 31 Mechanical performance of aquatic rowing Jerey A. Walker* and Mark W. Westneat Summary: appendages across a range of speeds. Flapping appendages proved...

6

Ectodysplasin signaling in cutaneous appendage development: Dose, duration and diversity   

E-Print Network [OSTI]

The development of several skin appendages is guided by prenatal Ectodysplasin signalling. Cui et al. (this issue, 2009) report on the dose and duration of Ectodysplasin signalling required for the maintenance and morphogenesis ...

Headon, Denis J.

2009-01-01T23:59:59.000Z

7

Mirror mount  

DOE Patents [OSTI]

A unique lens or mirror mount having adjustable constraints at two key locations to allow for ''X'' and ''Y'' tilts of the mirror only is disclosed. The device uses two pair of flexures of a type such that the pivots of the mirror gimble are rigidly fixed in all planes allowing the device to have zero stacking tolerance and zero wear over time. 4 figs.

Kuklo, T.C.; Bender, D.A.

1994-10-04T23:59:59.000Z

8

Comparison of analytic Whipple bumper shield ballistic limits with CTH simulations  

SciTech Connect (OSTI)

A series of CTH simulations were conducted to assess the feasibility of using the hydrodynamic code for debris cloud formation and to predict any damage due to the subsequent loading on rear structures. Six axisymmetric and one 3-dimensional simulations were conducted for spherical projectiles impacting Whipple bumper shields. The projectile diameters were chosen to correlate with two well known analytic expressions for the ballistic limit of a Whipple bumper shield. It has been demonstrated that CTH can be used to simulate the debris cloud formation, the propagation of the debris across a void region, and the secondary impact of the debris against a structure. In addition, the results from the CTH simulations were compared to the analytic estimates of the ballistic limit. At impact velocities of 10 km/s or less, the CTH predicted ballistic limit lays between the two analytic estimates. However, for impact velocities greater than 10 km/s, CTH simulations predicted a ballistic limit larger than both analytical estimates. The differences at high velocities are not well understood. Structural failure at late times due to the time integrated loading of a very diffuse debris cloud has not been considered in the CTH model. In addition, the analytic predictions are extrapolated from relatively low velocity data and the extrapolation technique may not be valid. The discrepancy between the two techniques should be investigated further.

Hertel, E.S. Jr.

1993-05-01T23:59:59.000Z

9

Mirror mount  

DOE Patents [OSTI]

A mirror mount is provided that allows free pitch, yaw and roll motion of the mirror while keeping the location of a point on the surface of the mirror fixed in the rest frame of reference of the mount. Yaw movement is provided by two yaw cylinders that are bearing mounted to provide rotation. Pitch and roll motion is provided by a spherically annular shell that is air bearing mounted to move between a clamp and an upper pedestal bearing. The centers of curvature of the spherical surfaces of the shell lie upon the point. Pitch motion and roll motion are separately and independently imparted to mirror by a pair of pitch paddles and a pair of roll paddles that are independently and separately moved by control rods driven by motors.

Humpal, H.H.

1986-03-21T23:59:59.000Z

10

Mirror mount  

DOE Patents [OSTI]

A mirror mount is provided that allows free pitch, yaw and roll motion of the mirror while keeping the location of a point on the surface of the mirror fixed in the rest frame of reference of the mount. Yaw movement is provided by two yaw cylinders that are bearing mounted to provide rotation. Pitch and roll motion is provided by a spherically annular shell that is air bearing mounted to move between a clamp and an upper pedestal bearing. The centers of curvature of the spherical surfaces of the shell lie upon the point. Pitch motion and roll motion are separately and independently imparted to mirror by a pair of pitch paddles and a pair of roll paddles that are independently and separately moved by control rods driven by motors. 5 figs.

Humpal, H.H.

1987-11-10T23:59:59.000Z

11

Erected mirror optical switch  

DOE Patents [OSTI]

A microelectromechanical (MEM) optical switching apparatus is disclosed that is based on an erectable mirror which is formed on a rotatable stage using surface micromachining. An electrostatic actuator is also formed on the substrate to rotate the stage and mirror with a high angular precision. The mirror can be erected manually after fabrication of the device and used to redirect an incident light beam at an arbitrary angel and to maintain this state in the absence of any applied electrical power. A 1.times.N optical switch can be formed using a single rotatable mirror. In some embodiments of the present invention, a plurality of rotatable mirrors can be configured so that the stages and mirrors rotate in unison when driven by a single micromotor thereby forming a 2.times.2 optical switch which can be used to switch a pair of incident light beams, or as a building block to form a higher-order optical switch.

Allen, James J.

2005-06-07T23:59:59.000Z

12

In China's Mirror  

E-Print Network [OSTI]

of California, Berkeley In China’s Mirror * Antônio Barrosthe article “No Espelho da China,” which originally appearedThomas, “Produtos Baratos da China Facilitam a Vida de

Barros de Castro, Antônio

2012-01-01T23:59:59.000Z

13

Laser correcting mirror  

DOE Patents [OSTI]

An improved laser correction mirror (10) for correcting aberrations in a laser beam wavefront having a rectangular mirror body (12) with a plurality of legs (14, 16, 18, 20, 22, 24, 26, 28) arranged into opposing pairs (34, 36, 38, 40) along the long sides (30, 32) of the mirror body (12). Vector force pairs (49, 50, 52, 54) are applied by adjustment mechanisms (42, 44, 46, 48) between members of the opposing pairs (34, 36, 38, 40) for bending a reflective surface 13 of the mirror body 12 into a shape defining a function which can be used to correct for comatic aberrations.

Sawicki, Richard H. (Danville, CA)

1994-01-01T23:59:59.000Z

14

Splayed mirror light pipes  

SciTech Connect (OSTI)

An expression is given for the transmission of the rectangular-section mirror light pipe. The expression is used to model throughputs for simulated solar conditions over a calender year. It is found that the splaying of a mirror light pipe results in a significant increase in throughputs particularly in winter months. (author)

Swift, P.D. [School of Physical Sciences, Dublin City University, Dublin 9 (Ireland)

2010-02-15T23:59:59.000Z

15

Stable mirror mount  

DOE Patents [OSTI]

An improved mirror mount assembly is disclosed. The mirror mount assembly provides a post assembly slidable in a Y-axis orientation and a nut plate assembly slidable in an X-axis orientation and means for simultaneously locking said post assembly and said key assembly in a fixed position.

Cutburth, R.W.

1983-11-04T23:59:59.000Z

16

Nanolaminate deformable mirrors  

DOE Patents [OSTI]

A deformable mirror formed out of two layers of a nanolaminate foil attached to a stiff substrate is introduced. Deformation is provided by an electrostatic force between two of the layers. The internal stiffness of the structure allows for high-spatial-frequency shapes. The nanolaminate foil of the present invention allows for a high-quality mirror surface. The device achieves high precision in the vertical direction by using foils with accurately controlled thicknesses, but does not require high precision in the lateral dimensions, allowing such mirrors to be fabricated using crude lithography techniques. Such techniques allow structures up to about the meter scale to be fabricated.

Papavasiliou, Alexandros P. (Oakland, CA); Olivier, Scot S. (Santa Cruz, CA)

2009-04-14T23:59:59.000Z

17

Are mirror planets opaque?  

E-Print Network [OSTI]

Over the last few years, many close orbiting ($\\sim 0.05$ A.U.) large mass planets ($\\sim M_{J}$) of nearby stars have been discovered. Their existence has been inferred from tiny Doppler shifts in the light from the star and in one case a transit has been observed. Because ordinary planets are not expected to be able to form this close to ordinary stars due to the high temperatures, it has been speculated that the close-in large planets are in fact exotic heavenly bodies made of mirror matter. We show that the accretion of ordinary matter onto the mirror planet (from e.g.the solar wind from the host star) should make the mirror planet opaque to ordinary radiation with an effective radius ($R_p$) large enough to explain the measured size of the transiting close-in extrasolar planet, HD209458b. Furthermore we obtain the rough prediction that $R_{p} \\propto \\sqrt{{T_s\\over M_p}}$ (where $T_s$, is the surface temperature of the ordinary matter in the mirror planet and $M_p$ is the mass of the mirror planet) which will be tested in the near future as more transiting planets are found. We also show that the mirror world interpretation of the close-in extra solar planets explains the low albedo of $\\tau$ Boo b because the large estimated mass of $\\tau$ Boo b ($\\sim 7M_J$) implies a small effective radius of $R_p \\approx 0.5R_J$ for $\\tau$ Boo.

R. Foot

2001-05-11T23:59:59.000Z

18

Transition Metal Switchable Mirror  

ScienceCinema (OSTI)

The switchable-mirrors technology was developed by Tom Richardson and Jonathan Slack of Berkeley Lab's Environmental Energy Technologies Division. By using transition metals rather than the rare earth metals used in the first metal-hydride switchable mirrors, Richardson and Slack were able to lower the cost and simplify the manufacturing process. Energy performance is improved as well, because the new windows can reflect or transmit both visible and infrared light. Besides windows for offices and homes, possible applications include automobile sunroofs, signs and displays, aircraft windows, and spacecraft. More information at: http://windows.lbl.gov/materials/chromogenics/default.htm

None

2013-05-29T23:59:59.000Z

19

Transition Metal Switchable Mirror  

ScienceCinema (OSTI)

The switchable-mirrors technology was developed by Tom Richardson and Jonathan Slack of Berkeley Lab's Environmental Energy Technologies Division. By using transition metals rather than the rare earth metals used in the first metal-hydride switchable mirrors, Richardson and Slack were able to lower the cost and simplify the manufacturing process. Energy performance is improved as well, because the new windows can reflect or transmit both visible and infrared light. Besides windows for offices and homes, possible applications include automobile sunroofs, signs and displays, aircraft windows, and spacecraft.

None

2010-01-08T23:59:59.000Z

20

Mirror Symmetry Constructions  

E-Print Network [OSTI]

These expository notes are based on lectures by Yongbin Ruan during a special semester on the B-model at the University of Michigan in Winter 2014. They outline and compare the mirror symmetry constructions of Batyrev-Borisov, Hori-Vafa, and Bergland-Hubsch-Krawitz.

Emily Clader; Yongbin Ruan

2014-12-03T23:59:59.000Z

Note: This page contains sample records for the topic "appendages mirrors bumpers" 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

Durable metallized polymer mirror  

DOE Patents [OSTI]

A metallized polymer mirror construction having improved durability against delamination and tunneling, comprising: an outer layer of polymeric material; a metal oxide layer underlying the outer layer of polymeric material; a silver reflective layer underneath the metal oxide layer; and a layer of adhesive attaching the silver layer to a substrate.

Schissel, Paul O. (Golden, CO); Kennedy, Cheryl E. (Lafayette, CO); Jorgensen, Gary J. (Pine, CO); Shinton, Yvonne D. (Northglenn, CO); Goggin, Rita M. (Englewood, CO)

1994-01-01T23:59:59.000Z

22

Durable metallized polymer mirror  

DOE Patents [OSTI]

A metallized polymer mirror construction is disclosed having improved durability against delamination and tunneling, comprising: an outer layer of polymeric material; a metal oxide layer underlying the outer layer of polymeric material; a silver reflective layer underneath the metal oxide layer; and a layer of adhesive attaching the silver layer to a substrate. 6 figs.

Schissel, P.O.; Kennedy, C.E.; Jorgensen, G.J.; Shinton, Y.D.; Goggin, R.M.

1994-11-01T23:59:59.000Z

23

Lithium-based electrochromic mirrors  

E-Print Network [OSTI]

LITHIUM-BASED ELECTROCHROMIC MIRRORS Thomas J. Richardson*with pure antimony films. Electrochromic cycling speed andand silver. INTRODUCTION Electrochromic devices that exhibit

Richardson, Thomas J.; Slack, Jonathan L.

2003-01-01T23:59:59.000Z

24

Science, Optics and You: Mirror and Images  

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

opticstutorialsindex.html INTRODUCTION MIRRORS AND IMAGES MODULE m3 SCIENCE, OPTICS & YOU GUIDEBOOK - 44 - SCIENCE, OPTICS & YOU GUIDEBOOK - 45 - m3: Mirrors and...

25

Electrons and Mirror Symmetry  

SciTech Connect (OSTI)

The neutral weak force between an electron and a target particle, mediated by the Z boson, can be isolated by measuring the fractional change under a mirror reflection of the scattering probability of relativistic longitudinally polarized electrons off unpolarized targets. This technique yields neutral weak force measurements at a length scale of 1 femtometer, in contrast to high energy collider measurements that probe much smaller length scales. Study of the variation of the weak force over a range of length scales provides a stringent test of theory, complementing collider measurements. We describe a recent measurement of the neutral weak force between two electrons by the E158 experiment at the Stanford Linear Accelerator Center. While the weak force between an electron and positron has been extensively studied, that between two electrons had never directly been measured. We conclude by discussing prospects for even more precise measurements at future facilities.

Kumar, Krishna (University of Massachusetts, Amherst) [University of Massachusetts, Amherst

2007-04-04T23:59:59.000Z

26

High stroke pixel for a deformable mirror  

DOE Patents [OSTI]

A mirror pixel that can be fabricated using standard MEMS methods for a deformable mirror. The pixel is electrostatically actuated and is capable of the high deflections needed for spaced-based mirror applications. In one embodiment, the mirror comprises three layers, a top or mirror layer, a middle layer which consists of flexures, and a comb drive layer, with the flexures of the middle layer attached to the mirror layer and to the comb drive layer. The comb drives are attached to a frame via spring flexures. A number of these mirror pixels can be used to construct a large mirror assembly. The actuator for the mirror pixel may be configured as a crenellated beam with one end fixedly secured, or configured as a scissor jack. The mirror pixels may be used in various applications requiring high stroke adaptive optics.

Miles, Robin R.; Papavasiliou, Alexandros P.

2005-09-20T23:59:59.000Z

27

Have mirror planets been observed?  

E-Print Network [OSTI]

Over the last few years, several close orbiting ($\\sim 0.05$ AU) large mass planets ($M \\sim M_{Jupiter}$) of nearby stars have been discovered. Their existence has been inferred from tiny doppler shifts in the light from the star. We suggest that these planets may be made of mirror matter. We also suggest that some stars such as our sun may have a similar amount of mirror matter which has escaped detection.

R. Foot

1999-11-23T23:59:59.000Z

28

Compact neutron imaging system using axisymmetric mirrors  

DOE Patents [OSTI]

A dispersed release of neutrons is generated from a source. A portion of this dispersed neutron release is reflected by surfaces of a plurality of nested, axisymmetric mirrors in at least an inner mirror layer and an outer mirror layer, wherein the neutrons reflected by the inner mirror layer are incident on at least one mirror surface of the inner mirror layer N times, wherein N is an integer, and wherein neutrons reflected by the outer mirror are incident on a plurality of mirror surfaces of the outer layer N+i times, where i is a positive integer, to redirect the neutrons toward a target. The mirrors can be formed by a periodically reversed pulsed-plating process.

Khaykovich, Boris; Moncton, David E; Gubarev, Mikhail V; Ramsey, Brian D; Engelhaupt, Darell E

2014-05-27T23:59:59.000Z

29

Alpha Channeling in Mirror Machines  

SciTech Connect (OSTI)

Because of their engineering simplicity, high-?, and steady-state operation, mirror machines and related open-trap machines such as gas dynamic traps, are an attractive concept for achieving controlled nuclear fusion. In these open-trap machines, the confinement occurs by means of magnetic mirroring, without the magnetic field lines closing upon themselves within the region of particle confinement. Unfortunately, these concepts have not achieved to date very spectacular laboratory results, and their reactor prospects are dimmed by the prospect of a low Q-factor, the ratio of fusion power produced to auxiliary power. Nonetheless, because of its engineering promise, over the years numerous improvements have been proposed to enhance the reactor prospects of mirror fusion, such as tandem designs, end-plugging, and electric potential barriers.

Fisch N.J.

2005-10-19T23:59:59.000Z

30

Compaction managed mirror bend achromat  

DOE Patents [OSTI]

A method for controlling the momentum compaction in a beam of charged particles. The method includes a compaction-managed mirror bend achromat (CMMBA) that provides a beamline design that retains the large momentum acceptance of a conventional mirror bend achromat. The CMMBA also provides the ability to tailor the system momentum compaction spectrum as desired for specific applications. The CMMBA enables magnetostatic management of the longitudinal phase space in Energy Recovery Linacs (ERLs) thereby alleviating the need for harmonic linearization of the RF waveform.

Douglas, David (Yorktown, VA)

2005-10-18T23:59:59.000Z

31

Mirror-Augmented Photovoltaic Designs and Performance  

E-Print Network [OSTI]

or area of PV panels'. Replex Plastics has developed a high performance, low-cost solar mirror made seeks to provide low cost power, using flat-panel PV modules, which have mirror augmented irradiance through the addition of low cost solar mirrors. In order to harvest more incident solar irradiance

Rollins, Andrew M.

32

CubeSat deformable mirror demonstration  

E-Print Network [OSTI]

The goal of the CubeSat Deformable Mirror Demonstration (DeMi) is to characterize the performance of a small deformable mirror over a year in low-Earth orbit. Small form factor deformable mirrors are a key technology needed ...

Cahoy, Kerri

33

The Axisymmetric Tandem Mirror: A Magnetic Mirror Concept Game Changer Magnet Mirror Status Study Group  

SciTech Connect (OSTI)

Experimental results, theory and innovative ideas now point with increased confidence to the possibility of a Gas Dynamic Trap (GDT) neutron source which would be on the path to an attractively simple Axisymmetric Tandem Mirror (ATM) power plant. Although magnetic mirror research was terminated in the US 20 years ago, experiments continued in Japan (Gamma 10) and Russia (GDT), with a very small US effort. This research has now yielded data, increased understanding, and generated ideas resulting in the new concepts described here. Early mirror research was carried out with circular axisymmetric magnets. These plasmas were MHD unstable due to the unfavorable magnetic curvature near the mid-plane. Then the minimum-B concept emerged in which the field line curvature was everywhere favorable and the plasma was situated in a MHD stable magnetic well (70% average beta in 2XII-B). The Ioffe-bar or baseball-coil became the standard for over 40 years. In the 1980's, driven by success with minimum-B stabilization and the control of ion cyclotron instabilities in PR6 and 2XII-B, mirrors were viewed as a potentially attractive concept with near-term advantages as a lower Q neutron source for applications such as a hybrid fission fuel factory or toxic waste burner. However there are down sides to the minimum-B geometry: coil construction is complex; restraining magnetic forces limit field strength and mirror ratios. Furthermore, the magnetic field lines have geodesic curvature which introduces resonant and neoclassical radial transport as observed in early tandem mirror experiments. So what now leads us to think that simple axisymmetric mirror plasmas can be stable? The Russian GDT experiment achieves on-axis 60% beta by peaking of the kinetic plasma pressure near the mirror throat (where the curvature is favorable) to counter-balance the average unfavorable mid-plane curvature. Then a modest augmentation of plasma pressure in the expander results in stability. The GDT experiments have confirmed the physics of effluent plasma stabilization predicted by theory. The plasma had a mean ion energy of 10 keV and a density of 5e19m-3. If successful, the axisymmetric tandem mirror extension of the GDT idea could lead to a Q {approx} 10 power plant of modest size and would yield important applications at lower Q. In addition to the GDT method, there are four other ways to augment stability that have been demonstrated; including: plasma rotation (MCX), diverter coils (Tara), pondermotive (Phaedrus & Tara), and end wall funnel shape (Nizhni Novgorod). There are also 5 stabilization techniques predicted, but not yet demonstrated: expander kinetic pressure (KSTM-Post), Pulsed ECH Dynamic Stabilization (Post), wall stabilization (Berk), non-paraxial end mirrors (Ryutov), and cusp ends (Kesner). While these options should be examined further together with conceptual engineering designs. Physics issues that need further analysis include: electron confinement, MHD and trapped particle modes, analysis of micro stability, radial transport, evaluation and optimization of Q, and the plasma density needed to bridge to the expansion-region. While promising all should be examined through increased theory effort, university-scale experiments, and through increased international collaboration with the substantial facilities in Russia and Japan The conventional wisdom of magnetic mirrors was that they would never work as a fusion concept for a number of reasons. This conventional wisdom is most probably all wrong or not applicable, especially for applications such as low Q (DT Neutron Source) aimed at materials testing or for a Q {approx} 3-5 fusion neutron source applied to destroying actinides in fission waste and breeding of fissile fuel.

Simonen, T; Cohen, R; Correll, D; Fowler, K; Post, D; Berk, H; Horton, W; Hooper, E B; Fisch, N; Hassam, A; Baldwin, D; Pearlstein, D; Logan, G; Turner, B; Moir, R; Molvik, A; Ryutov, D; Ivanov, A A; Kesner, J; Cohen, B; McLean, H; Tamano, T; Tang, X Z; Imai, T

2008-10-24T23:59:59.000Z

34

Passivation coating for flexible substrate mirrors  

DOE Patents [OSTI]

A protective diffusion barrier for metalized mirror structures is provided by a layer or coating of silicon nitride which is a very dense, transparent, dielectric material that is impervious to water, alkali, and other impurities and corrosive substances that typically attack the metal layers of mirrors and cause degradation of the mirrors' reflectivity. The silicon nitride layer can be deposited on the substrate before metal deposition thereon to stabilize the metal/substrate interface, and it can be deposited over the metal to encapsulate it and protect the metal from corrosion or other degradation. Mirrors coated with silicon nitride according to this invention can also be used as front surface mirrors. Also, the silver or other reflective metal layer on mirrors comprising thin, lightweight, flexible substrates of metal or polymer sheets coated with glassy layers can be protected with silicon nitride according to this invention.

Tracy, C. Edwin (Golden, CO); Benson, David K. (Golden, CO)

1990-01-01T23:59:59.000Z

35

Mirror Development for the Cherenkov Telescope Array  

E-Print Network [OSTI]

The Cherenkov Telescope Array (CTA) is a planned observatory for very-high energy gamma-ray astronomy. It will consist of several tens of telescopes of different sizes, with a total mirror area of up to 10,000 square meters. Most mirrors of current installations are either polished glass mirrors or diamond-turned aluminium mirrors, both labour intensive technologies. For CTA, several new technologies for a fast and cost-efficient production of light-weight and reliable mirror substrates have been developed and industrial pre-production has started for most of them. In addition, new or improved aluminium-based and dielectric surface coatings have been developed to increase the reflectance over the lifetime of the mirrors compared to those of current Cherenkov telescope instruments.

Förster, A; Baba, H; Bähr, J; Bonardi, A; Bonnoli, G; Brun, P; Canestrari, R; Chadwick, P; Chikawa, M; Carton, P -H; De Souza, V; Dipold, J; Doro, M; Durand, D; Dyrda, M; Giro, E; Glicenstein, J -F; Hanabata, Y; Hayashida, M; Hrabovski, M; Jeanney, C; Kagaya, M; Katagiri, H; Lessio, L; MANDAT, D; Mariotti, M; Medina, C; Micha?owski, J; Micolon, P; Nakajima, D; Niemiec, J; Nozato, A; Palatka, M; Pareschi, G; Pech, M; Peyaud, B; Pühlhofer, G; Rataj, M; Rodeghiero, G; Rojas, G; Rousselle, J; Sakonaka, R; Schovanek, P; Seweryn, K; Schultz, C; Shu, S; Stinzing, F; Stodulski, M; Teshima, M; Travniczek, P; Van Eldik, C; Vassiliev, V; Wi?niewski, ?; Wörnlein, A; Yoshida, T

2013-01-01T23:59:59.000Z

36

Deformable mirror for short wavelength applications  

DOE Patents [OSTI]

A deformable mirror compatible with short wavelength (extreme ultraviolet) radiation that can be precisely controlled to nanometer and subnanometer accuracy is described. Actuators are coupled between a reaction plate and a face plate which has a reflective coating. A control system adjusts the voltage supplied to the actuators; by coordinating the voltages supplied to the actuators, the reflective surface of the mirror can be deformed to correct for dimensional errors in the mirror or to produce a desired contour.

Chapman, Henry N. (2417 Kilkare Rd., Sunol, CA 94586); Sweeney, Donald W. (5020 Canyon Crest Dr., San Ramon, CA 94583)

1999-01-01T23:59:59.000Z

37

Process for preparing improved silvered glass mirrors  

DOE Patents [OSTI]

Glass mirrors having improved weathering properties are prepared by an improvement in the process for making the mirrors. The glass surface after it has been cleaned but before it is silvered, is contacted with a solution of lanthanide rare earths in addition to a sensitization solution of tin or palladium. The addition of the rare earths produces a mirror which has increased resistance to delamination of the silver from the glass surface in the presence of water.

Buckwalter, C.Q. Jr.

1980-01-28T23:59:59.000Z

38

Tandem mirror technology demonstration facility  

SciTech Connect (OSTI)

This report describes a facility for generating engineering data on the nuclear technologies needed to build an engineering test reactor (ETR). The facility, based on a tandem mirror operating in the Kelley mode, could be used to produce a high neutron flux (1.4 MW/M/sup 2/) on an 8-m/sup 2/ test area for testing fusion blankets. Runs of more than 100 h, with an average availability of 30%, would produce a fluence of 5 mW/yr/m/sup 2/ and give the necessary experience for successful operation of an ETR.

Not Available

1983-10-01T23:59:59.000Z

39

ESnet IPv6 Mirror Servers  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May JunDatastreamsmmcrcalgovInstrumentsruc DocumentationP-Series to UserProduct:DirectivesSAND2015-21271MostMirror Servers Engineering

40

LED structure with enhanced mirror reflectivity  

DOE Patents [OSTI]

Embodiments of the present invention are generally related to LED chips having improved overall emission by reducing the light-absorbing effects of barrier layers adjacent mirror contacts. In one embodiment, a LED chip comprises one or more LEDs, with each LED having an active region, a first contact under the active region having a highly reflective mirror, and a barrier layer adjacent the mirror. The barrier layer is smaller than the mirror such that it does not extend beyond the periphery of the mirror. In another possible embodiment, an insulator is further provided, with the insulator adjacent the barrier layer and adjacent portions of the mirror not contacted by the active region or by the barrier layer. In yet another embodiment, a second contact is provided on the active region. In a further embodiment, the barrier layer is smaller than the mirror such that the periphery of the mirror is at least 40% free of the barrier layer, and the second contact is below the first contact and accessible from the bottom of the chip.

Bergmann, Michael; Donofrio, Matthew; Heikman, Sten; Schneider, Kevin S; Haberern, Kevin W; Edmond, John A

2014-04-01T23:59:59.000Z

Note: This page contains sample records for the topic "appendages mirrors bumpers" 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

Thermal loading considerations for synchrotron radiation mirrors  

SciTech Connect (OSTI)

Grazing incidence mirrors used to focus synchrotron radiation beams through small distant apertures have severe optical requirements. The surface distortion due to heat loading of the first mirror in a bending magnet beam line is of particular concern when a large fraction of the incident beam is absorbed. In this paper we discuss mirror design considerations involved in minimizing the thermal/mechanical loading on vertically deflecting first surface mirrors required for SPEAR synchrotron radiation beam lines. Topics include selection of mirror material and cooling method, the choice of SiC for the substrate, optimization of the thickness, and the design of the mirror holder and cooling mechanism. Results obtained using two-dimensional, finite-element thermal/mechanical distortion analysis are presented for the case of a 6/sup 0/ grazing incidence SiC mirror absorbing up to 260 W at Beam Line VIII on the SPEAR ring. Test descriptions and results are given for the material used to thermally couple this SiC mirror to a water-cooled block. The interface material is limited to applications for which the equivalent normal heat load is less than 20 W/cm/sup 2/.

Holdener, F.R.; Berglin, E.J.; Fuchs, B.A.; Humpal, H.H.; Karpenko, V.P.; Martin, R.W.; Tirsell, K.G.

1986-03-26T23:59:59.000Z

42

Philosophy and the Mirror of Nature  

E-Print Network [OSTI]

Philosophy and the Mirror of Nature Richard Rorty Philosophy and the Mir- ror of Nature hit has since gone on to be- come one of its all-time best-sellers in philosophy. Rorty argued that, repairing, and polishing the mirror-- belongs to philosophy. Rorty's book was a powerful critique

Landweber, Laura

43

Three-point spherical mirror mount  

DOE Patents [OSTI]

A three-point spherical mirror mount for use with lasers is disclosed. The improved mirror mount is adapted to provide a pivot ring having an outer surface with at least three spaced apart mating points to engage an inner spherical surface of a support housing.

Cutburth, R.W.

1984-01-23T23:59:59.000Z

44

Sandia National Laboratories: New Sandia Mirror Isn't Shiny:...  

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

& CapabilitiesCapabilitiesNew Sandia Mirror Isn't Shiny: Instead It Reflects Infrared Light Using a Metamaterial New Sandia Mirror Isn't Shiny: Instead It Reflects...

45

Coating considerations for mirrors of CPV devices  

SciTech Connect (OSTI)

One of the different optical concepts for concentrator devices is to place a focussing primary mirror behind a transparent front plate. In addition (also in case of Fresnel-diffractive main optics), further 'secondary' reflectors may be used further along the beam path. Such mirrors are usually implemented as coating stacks of a highly reflective metal - usually silver - and protective layers. The protective layers are preferably designed as reflection enhancing interference stack. The design of such protective layer stacks yields two difficulties, which are addressed in this paper: (a) vacuum coating of three-dimensional parts will result in a thickness distribution and the optical design of the stack should thus be tolerant to layer thickness variations, and (b) different places of the mirror will have different angle-of-incidence of the sunlight under operating conditions. As result, the layer stack has a different design at different places of the mirror.

Schmauder, Torsten; Sauer, Peter; Ickes, Gerd [Leybold Optics GmbH, Siemensstr. 88, D-63755 Alzenau (Germany)

2014-09-26T23:59:59.000Z

46

The mirror effect: Virginia Woolf's war writings  

E-Print Network [OSTI]

THE MIRROR EFFECT: VIRGINIA WOOLF'S WAR WRITINGS A Semor Honors Thesis By MARCIA WILKENS MURCHISON Submitted to the Office of Honors Programs & Academic Scholarships Texas A&M University In partial fulfillment of the requirements... of the UNIVERSITY UNDERGRADUATE RESEARCH FELLOWS April 2000 Group: Humanities THE MIRROR EFFECT: VIRGINIA WOOLF'S WAR WRITINGS A Senior Honors Thesis By MARCIA WILKENS MURCHISON Submitted to the Office of Honors Programs & Academic Scholarships Texas Ak...

Murchison, Marcia Wilkens

2013-02-22T23:59:59.000Z

47

Neutron diagnostics for mirror hybrids  

SciTech Connect (OSTI)

Fusion-fission (FuFi) hybrids will need instrumentation to diagnose the deuteriumtritium plasma, whose 14-MeV neutron emission is the driver of the sub-critical fission core. While the fission neutron yield rate (Y{sub fi} and hence power P{sub fi}) can be monitored with standard instrumentation, fusion plasmas in hybrids require special diagnostics where the determination of Y{sub th} ({proportional_to}P{sub fu}) is a challenge. Information on Y{sub fu} is essential for assessing the fusion plasma performance which together with Y{sub fi} allows for the validation of the neutron multiplication factor (k) of the subcritical fission core. Diagnostics for hybrid plasmas are heuristically discussed with special reference to straight field line mirror (SFLM). Relevant DT plasma experience from JET and plans for ITER in the main line of fusion research were used as input. It is shown that essential SFLM plasma information can potentially be obtained with proposed instrumentation, but the state of the hybrid plasma must be predictably robust as derived from fully diagnosed dedicated experiments without interface restrictions of the hybrid application.

Kaellne, Jan; Noack, Klaus; Agren, Olov; Gorini, Giuseppe; Tardocchi, Marco; Grosso, Giovanni [Department of Engineering Sciences, Uppsala University, Box 256, SE-751 21 Uppsala (Sweden); Universita degli Studi di Milano - Bicocca, Dip. di Fisica 'G. Occhialini', Piazza della Scienza 3, 20126, Milan (Italy)

2012-06-19T23:59:59.000Z

48

Tape-Drive Based Plasma Mirror  

SciTech Connect (OSTI)

We present experimental results on a tape-drive based plasma mirror which could be used for a compact coupling of a laser beam into a staged laser driven electron accelerator. This novel kind of plasma mirror is suitable for high repetition rates and for high number of laser shots. In order to design a compact, staged laser plasma based accelerator or collider [1], the coupling of the laser beam into the different stages represents one of the key issues. To limit the spatial foot print and thus to realize a high overall acceleration gradient, a concept has to be found which realizes this in-coupling within a few centimeters (cf. Fig 1). The fluence of the laser pulse several centimeters away from the acceleration stage (focus) exceeds the damage threshold of any available mirror coating. Therefore, in reference [2] a plasma mirror was suggested for this purpose. We present experiments on a tape-drive based plasma mirror which could be used to reflect the focused laser beam into the acceleration stage. Plasma mirrors composed of antireflection coated glass substrates are usually used to improve the temporal laser contrast of laser pulses by several orders of magnitudes [3,4]. This is particularly important for laser interaction with solid matter, such as ion acceleration [5,6] and high harmonic generation on surfaces [7]. Therefore, the laser pulse is weekly focused onto a substrate. The main pulse generates a plasma and is reflected at the critical surface, whereas the low intensity pre-pulse (mainly the Amplified Spontaneous Emission pedestal) will be transmitted through the substrate before the mirror has been triggered. Several publications [3,4] demonstrate a conservation of the spatial beam quality and a reflectivity of about 70 %. The drawback of this technique is the limited repetition rate since for every shot a fresh surface has to be provided. In the past years several novel approaches for high repetition rate plasma mirrors have been developed [2, 8]. Nevertheless, for the staged accelerator scheme a second important requirement has to be considered. Since the electron beam has to propagate through the mirror, the thickness of the substrate has to be as thin as possible to reduce the distortion of the electron beam. A tape of only several micrometer thickness can overcome these disadvantages. It can be used with a sufficient repetition rate while it allows the electron beam to propagate through with a minimum of scattering.

Sokollik, Thomas; Shiraishi, Satomi; Osterhoff, Jens; Evans, Eugene; Gonsalves, Anthony; Nakamura, Kei; vanTilborg, Jeroen; Lin, Chen; Toth, Csaba; Leemans, Wim

2011-07-22T23:59:59.000Z

49

Alignment and focus of mirrored facets of a heliosat  

DOE Patents [OSTI]

Various technologies pertaining to aligning and focusing mirrored facets of a heliostat are described herein. Updating alignment and/or focus of mirrored facets is undertaken through generation of a theoretical image, wherein the theoretical image is indicative of a reflection of the target via the mirrored facets when the mirrored facets are properly aligned. This theoretical image includes reference points that are overlaid on an image of the target as reflected by the mirrored facets of the heliostat. A technician adjusts alignment/focus of a mirrored facet by causing reflected reference markings to become aligned with the reference points in the theoretical image.

Yellowhair, Julius E; Ho, Clifford Kuofei; Diver, Richard B; Moss, Timothy A

2013-11-12T23:59:59.000Z

50

Subcritical mirror structures in an anisotropic plasma  

E-Print Network [OSTI]

Based on Grad-Shafranov-like equations, a gyrotropic plasma where the pressures in the static regime are only functions of the amplitude of the local magnetic field is shown to be amenable to a variational principle with a free energy density given by the parallel tension. This approach is used to demonstrate that small- amplitude static holes constructed slightly below the mirror instability threshold identify with lump solitons of KPII equation and turn out to be unstable. It is also shown that regularizing effects such as finite Larmor radius corrections cannot be ignored in the description of large-amplitude mirror structures.

Kuznetsov, E A; Ruban, V P; Sulem, P L

2013-01-01T23:59:59.000Z

51

Novel neutron focusing mirrors for compact neutron sources  

E-Print Network [OSTI]

We demonstrated neutron beam focusing and neutron imaging using axisymmetric optics, based on pairs of confocal ellipsoid and hyperboloid mirrors. Such systems, known as Wolter mirrors, are commonly used in x-ray telescopes. ...

Gubarev, M.V.

52

An Advanced Fast Steering Mirror for optical communication  

E-Print Network [OSTI]

I describe in this thesis the design, fabrication, assembly, and testing of an Advanced Fast Steering Mirror (AFSM) for precision optical platforms. The AFSM consists of a mirror driven in two rotational axes by normal ...

Kluk, Daniel Joseph

2007-01-01T23:59:59.000Z

53

Solid State Replacement of Rotating Mirror Cameras  

SciTech Connect (OSTI)

Rotating mirror cameras have been the mainstay of mega-frame per second imaging for decades. There is still no electronic camera that can match a film based rotary mirror camera for the combination of frame count, speed, resolution and dynamic range. The rotary mirror cameras are predominantly used in the range of 0.1 to 100 micro-seconds per frame, for 25 to more than a hundred frames. Electron tube gated cameras dominate the sub microsecond regime but are frame count limited. Video cameras are pushing into the microsecond regime but are resolution limited by the high data rates. An all solid state architecture, dubbed ''In-situ Storage Image Sensor'' or ''ISIS'', by Prof. Goji Etoh, has made its first appearance into the market and its evaluation is discussed. Recent work at Lawrence Livermore National Laboratory has concentrated both on evaluation of the presently available technologies and exploring the capabilities of the ISIS architecture. It is clear though there is presently no single chip camera that can simultaneously match the rotary mirror cameras, the ISIS architecture has the potential to approach their performance.

Frank, A M; Bartolick, J M

2006-08-25T23:59:59.000Z

54

Thermomechanical characterization of a membrane deformable mirror  

SciTech Connect (OSTI)

A membrane deformable mirror has been investigated for its potential use in high-energy laser systems. Experiments were performed in which the deformable mirror was heated with a 1 kW incandescent lamp and the thermal profile, the wavefront aberrations, and the mechanical displacement of the membrane were measured. A finite element model was also developed. The wavefront characterization experiments showed that the wavefront degraded with heating. Above a temperature of 35 deg. C, the wavefront characterization experiments indicated a dramatic increase in the high-order wavefront modes before the optical beam became immeasurable in the sensors. The mechanical displacement data of the membrane mirror showed that during heating, the membrane initially deflected towards the heat source and then deflected away from the heat source. Finite element analysis (FEA) predicted a similar displacement behavior as shown by the mechanical displacement data but over a shorter time scale and a larger magnitude. The mechanical displacement data also showed that the magnitude of membrane displacement increased with the experiments that involved higher temperatures. Above a temperature of 35 deg. C, the displacement data showed that random deflections as a function of time developed and that the magnitude of these deflections increased with increased temperature. We concluded that convection, not captured in the FEA, likely played a dominant role in mirror deformation at temperatures above 35 deg. C.

Morse, Kathleen A.; McHugh, Stuart L.; Fixler, Jeff

2008-10-10T23:59:59.000Z

55

A Few Observations about Mounting Moderately Sized Mirrors  

SciTech Connect (OSTI)

Most of the mirror mounting literature has focused on small (less than 0.1 meters) or large (greater than 1 meter) mirrors. We will examine the theory and practice of mounting moderately sized mirrors (between 0.1 and 1 meter). Two examples will be taken from optical diagnostic systems designed for the National Ignition Facility (NIF). In both cases the mirrors were removable (not bonded in place). One of the examples will be for a mirror with a poor aspect ratio (i.e. diameter to thickness ratio greater than 15:1).

Kaufman, M. I.

2011-09-01T23:59:59.000Z

56

Silicon nitride protective coatings for silvered glass mirrors  

DOE Patents [OSTI]

A protective diffusion barrier for metalized mirror structures is provided by a layer or coating of silicon nitride which is a very dense, transparent, dielectric material that is impervious to water, alkali, and other impurities and corrosive substances that typically attack the metal layers of mirrors and cause degradation of the mirrors' reflectivity. The silicon nitride layer can be deposited on the substrate before metal deposition to stabilize the metal/substrate interface, and it can be deposited over the metal to encapsulate it and protect the metal from corrosion or other degradation. Mirrors coated with silicon nitride according to this invention can also be used as front surface mirrors.

Tracy, C. Edwin (Golden, CO); Benson, David K. (Golden, CO)

1988-01-01T23:59:59.000Z

57

Silicon nitride protective coatings for silvered glass mirrors  

DOE Patents [OSTI]

A protective diffusion barrier for metalized mirror structures is provided by a layer or coating of silicon nitride which is a very dense, transparent, dielectric material that is impervious to water, alkali, and other impurities and corrosive substances that typically attack the metal layers of mirrors and cause degradation of the mirrors' reflectivity. The silicon nitride layer can be deposited on the substrate prior to metal deposition thereon to stabilize the metal/substrate interface, and it can be deposited over the metal to encapsulate it and protect the metal from corrosion or other degradation. Mirrors coated with silicon nitride according to this invention can also be used as front surface mirrors.

Tracy, C.E.; Benson, D.K.

1984-07-20T23:59:59.000Z

58

Do mirror planets exist in our solar system?  

E-Print Network [OSTI]

Mirror matter is predicted to exist if parity is an unbroken symmetry of nature. Currently, there is a large amount of evidence that mirror matter actually exists coming from astrophysics and particle physics. One of the most fascinating (but speculative) possibilities is that there is a significant abundance of mirror matter within our solar system. If the mirror matter condensed to form a large body of planatary or stellar mass then there could be interesting observable effects. Indeed studies of long period comets suggest the existence of a solar companion which has escaped direct detection and is therefore a candidate for a mirror body. Nemesis, hypothetical "death star" companion of the Sun, proposed to explain biological mass extinctions, may potentially be a mirror star. We examine the prospects for detecting these objects if they do indeed exist and are made of mirror matter.

R. Foot; Z. K. Silagadze

2001-04-15T23:59:59.000Z

59

Silicon carbide mirrors for high power applications  

SciTech Connect (OSTI)

The advent of synchrotron radiation (SR) sources and high energy lasers (HEL) in recent years has brought about the need for optical materials that can withstand the harsh operating conditions in such devices. SR mirrors must be ultra-high vacuum compatible, must withstand intense x-ray irradiation without surface damage, must maintain surface figure under thermal loading and must be capable of being polished to an extremely smooth surface finish. Chemical vapor deposited (CVD) silicon carbide in combination with sintered substrate material meets these requirements and offers additional benefits as well. It is an extremely hard material and offers the possibility of being cleaned and recoated many times without degradation of the surface finish, thereby prolonging the lifetime of expensive optical components. It is an extremely strong material and offers the possibility of weight reduction over conventional mirror materials.

Takacs, P.Z.

1981-11-01T23:59:59.000Z

60

Mirror Symmetry in Physics: The Basics  

E-Print Network [OSTI]

These notes are aimed at mathematicians working on topics related to mirror symmetry, but are unfamiliar with the physical origins of this subject. We explain the physical concepts that enable this surprising duality to exist, using the torus as an illustrative example. Then, we develop the basic foundations of conformal field theory so that we can explain how mirror symmetry was first discovered in that context. Along the way we will uncover a deep connection between conformal field theories with (2,2) supersymmetry and Calabi-Yau manifolds. (Based on lectures given during the "Thematic Program on Calabi-Yau Varieties: Arithmetic, Geometry and Physics" at the Fields Institute in Toronto, October 10-11, 2013.)

Callum Quigley

2014-12-28T23:59:59.000Z

Note: This page contains sample records for the topic "appendages mirrors bumpers" 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

Fiber optics welder having movable aligning mirror  

DOE Patents [OSTI]

A system for welding fiber optic waveguides together. The ends of the two fibers to be joined together are accurately, collinearly aligned in a vertical orientation and subjected to a controlled, diffuse arc to effect welding and thermal conditioning. A front-surfaced mirror mounted at a 45.degree. angle to the optical axis of a stereomicroscope mounted for viewing the junction of the ends provides two orthogonal views of the interface during the alignment operation.

Higgins, Robert W. (Los Alamos, NM); Robichaud, Roger E. (Jemez Springs, NM)

1981-01-01T23:59:59.000Z

62

Engineering problems of tandem-mirror reactors  

SciTech Connect (OSTI)

We have completed a comparative evaluation of several end plug configurations for tandem mirror fusion reactors with thermal barriers. The axi-cell configuration has been selected for further study and will be the basis for a detailed conceptual design study to be carried out over the next two years. The axi-cell end plug has a simple mirror cell produced by two circular coils followed by a transition coil and a yin-yang pair, which provides for MHD stability. This paper discusses some of the many engineering problems facing the designer. We estimated the direct cost to be 2$/W/sub e/. Assuming total (direct and indirect) costs to be twice this number, we need to reduce total costs by factors between 1.7 and 2.3 to compete with future LWRs levelized cost of electricity. These reductions may be possible by designing magnets producing over 20T made possible by use of combinations of superconducting and normal conducting coils as well as improvements in performance and cost of neutral beam and microwave power systems. Scientific and technological understanding and innovation are needed in the area of thermal barrier pumping - a process by which unwanted particles are removed (pumped) from certain regions of velocity and real space in the end plug. Removal of exhaust fuel ions, fusion ash and impurities by action of a halo plasma and plasma dump in the mirror end region is another challenging engineering problem discussed in this paper.

Moir, R.W.; Barr, W.L.; Boghosian, B.M.

1981-10-22T23:59:59.000Z

63

Composite mirror facets for ground based gamma ray astronomy  

E-Print Network [OSTI]

Composite mirrors for gamma-ray astronomy have been developed to fulfill the specifications required for the next generation of Cherenkov telescopes represented by CTA (Cherenkov Telescope Array). In addition to the basic requirements on focus and reflection efficiency, the mirrors have to be stiff, lightweight, durable and cost efficient. In this paper, the technology developed to produce such mirrors is described, as well as some tests that have been performed to validate them. It is shown that these mirrors comply with the needs of CTA, making them good candidates for use on a significant part of the array.

Brun, P; Durand, D; Glicenstein, J-F; Jeanney, C; Medina, M C; Micolon, P; Peyaud, B

2013-01-01T23:59:59.000Z

64

Neutron-Mirror-Neutron Oscillations in a Trap  

E-Print Network [OSTI]

We calculate the rate of neutron-mirror-neutron oscillations for ultracold neutrons trapped in a storage vessel. Recent experimental bounds on the oscillation time are discussed.

B. Kerbikov; O. Lychkovskiy

2008-04-03T23:59:59.000Z

65

Elliptically Bent X-ray Mirrors with Active Temperature Stabilization  

E-Print Network [OSTI]

stabilization based on a Peltier element attached directlyof the mirror with a Peltier element attached directly tostabilization based on a Peltier element have shown a

Yuan, Sheng

2010-01-01T23:59:59.000Z

66

Nondispersive neutron focusing method beyond the critical angle of mirrors  

DOE Patents [OSTI]

This invention extends the Kirkpatrick-Baez (KB) mirror focusing geometry to allow nondispersive focusing of neutrons with a convergence on a sample much larger than is possible with existing KB optical schemes by establishing an array of at least three mirrors and focusing neutrons by appropriate multiple deflections via the array. The method may be utilized with supermirrors, multilayer mirrors, or total external reflection mirrors. Because high-energy x-rays behave like neutrons in their absorption and reflectivity rates, this method may be used with x-rays as well as neutrons.

Ice, Gene E. (Oak Ridge, TN)

2008-10-21T23:59:59.000Z

67

Stroke amplifier for deformable mirrors Robert H. Webb, Marc J. Albanese, Yaopeng Zhou, Thomas Bifano, and  

E-Print Network [OSTI]

Stroke amplifier for deformable mirrors Robert H. Webb, Marc J. Albanese, Yaopeng Zhou, Thomas stroke of a deformable mirror. By arranging for the wavefront to traverse the deformable mirror more than to produce lower- cost mirrors. Unfortunately, most commercial MEMS mirrors have only a limited stroke

68

Rotordynamics of rub rings and bumpers  

E-Print Network [OSTI]

Ior as a reti. 'rence to show how we)l the plastics perl'orm. 'I'hc test procediires done lor thiec dillerent radial cleat"?lees (s. 0 mils, 7. 5 inils and 10. 0 mils) I'or each inatcrial. 'I'he KR-4190 material appi:ared to hc the hest inaterial... Bode plot (no rub ring). 8 Basic rub interaction forces. 26 9 Shafi speed versus time foi RUN 24 (PI-200, c=fi 0 mils). . . 10 Iinpact amplitude versus shafi speed for RLIN 24 (PI-200, c=S 0 mils). , 31 I I Schematic for definition ol'variables. 34...

Sinclair, Steven Jeffery

1995-01-01T23:59:59.000Z

69

Potential of Mirror Systems as Future Fusion Power Reactors  

SciTech Connect (OSTI)

Mirror based fusion reactors - as other fusion reactor concepts - have considerable environmental and safety advantages. They could make available energy resources for many 1000 years. Mirror type fusion reactors have additional technical advantages over other fusion reactor concepts. These are: simple design topology, steady state power generation, decoupling of end plugs from central power producing regions, small power units as demonstration facilities.

Kessler, Guenter; Kulcinski, Gerald L. [University of Madison (United States)

2005-01-15T23:59:59.000Z

70

Thermoptic analysis of bimetallic mirrors Daniel Vukobratovich and Allen Gerzoff  

E-Print Network [OSTI]

plated with electroless nickel to reduce light scattering. The thermal coefficient of expansion of electroless nickel, 13.5 x 10 ­6 m/m­K, is significantly different from that of a typical mirror substrate in an electroless nickel plated mirror, which can induce optical surface distortion. Possible solutions to the ``bi

71

MEASUREMENT OF MIRROR PANELS USING COLOURED PATTERN DEFLECTOMETRY  

E-Print Network [OSTI]

and parabolic dish solar concentrators. Factory production of mirror panels also requires accurate measurementsMEASUREMENT OF MIRROR PANELS USING COLOURED PATTERN DEFLECTOMETRY Paul M. Scott1 , and Greg Burgess2 1 Research Assistant, Solar Thermal Group, Australian National University (ANU), Building 32 North

72

THORIUM-BASED MIRRORS IN THE EXTREME ULTRAVIOLET Nicole Farnsworth  

E-Print Network [OSTI]

THORIUM-BASED MIRRORS IN THE EXTREME ULTRAVIOLET by Nicole Farnsworth Submitted to Brigham Young Ultraviolet and Thorium-based Mirrors . . . 1 1.2 Project Background the Optical Constants of Thorium Oxide 34 3.1 Reflectance and Transmittance Measurements

Hart, Gus

73

Compact Reflective Imaging Spectrometer Design Utilizing An Immersed Grating And Anamorphic Mirror  

DOE Patents [OSTI]

A compact imaging spectrometer comprising an entrance slit, an anamorphic mirror, a grating, and a detector array. The entrance slit directs light to the anamorphic mirror. The anamorphic mirror receives the light and directs the light to the grating. The grating receives the light from the anamorphic mirror and defracts the light back onto the anamorphic mirror. The anamorphic mirror focuses the light onto a detector array.

Lerner, Scott A. (Corvalis, OR)

2006-01-10T23:59:59.000Z

74

Background-reducing X-ray multilayer mirror  

DOE Patents [OSTI]

Background-reducing x-ray multilayer mirror. A multiple-layer "wavetrap" deposited over the surface of a layered, synthetic-microstructure soft x-ray mirror optimized for reflectivity at chosen wavelengths is disclosed for reducing the reflectivity of undesired, longer wavelength incident radiation incident thereon. In three separate mirror designs employing an alternating molybdenum and silicon layered, mirrored structure overlaid by two layers of a molybdenum/silicon pair anti-reflection coating, reflectivities of near normal incidence 133, 171, and 186 .ANG. wavelengths have been optimized, while that at 304 .ANG. has been minimized. The optimization process involves the choice of materials, the composition of the layer/pairs as well as the number thereof, and the distance therebetween for the mirror, and the simultaneous choice of materials, the composition of the layer/pairs, and their number and distance for the "wavetrap."

Bloch, Jeffrey J. (Los Alamos, NM); Roussel-Dupre', Diane (Los Alamos, NM); Smith, Barham W. (Los Alamos, NM)

1992-01-01T23:59:59.000Z

75

Engineering and manufacturing of ITER first mirror mock-ups  

SciTech Connect (OSTI)

Most of the ITER optical diagnostics aiming at viewing and monitoring plasma facing components will use in-vessel metallic mirrors. These mirrors will be exposed to a severe plasma environment and lead to an important tradeoff on their design and manufacturing. As a consequence, investigations are carried out on diagnostic mirrors toward the development of optimal and reliable solutions. The goals are to assess the manufacturing feasibility of the mirror coatings, evaluate the manufacturing capability and associated performances for the mirrors cooling and polishing, and finally determine the costs and delivery time of the first prototypes with a diameter of 200 and 500 mm. Three kinds of ITER candidate mock-ups are being designed and manufactured: rhodium films on stainless steel substrate, molybdenum on TZM substrate, and silver films on stainless steel substrate. The status of the project is presented in this paper.

Joanny, M.; Travere, J. M.; Salasca, S.; Corre, Y. [CEA, IRFM, F-13108 Saint-Paul-lez-Durance (France); Marot, L. [Department of Physics, University of Basel, Klingelbergstrasse 82, CH-4056 Basel (Switzerland); Thellier, C.; Gallay, G.; Cammarata, C.; Passier, B.; Ferme, J. J. [SESO, 305 Rue Louis Armand CS 30504, 13593 Aix-en-Provence Cedex 3 (France)

2010-10-15T23:59:59.000Z

76

The Gasdynamic Mirror Fusion Propulsion System -- Revisited  

SciTech Connect (OSTI)

Many of the previous studies assessing the capability of the gasdynamic mirror (GDM) fusion propulsion system employed analyses that ignored the 'ambipolar' potential. This electrostatic potential arises as a result of the rapid escape of the electrons due to their small mass. As they escape, they leave behind an excess positive charge which manifests itself in an electric field that slows down the electrons while speeding up the ions until their respective axial diffusions are equalized. The indirect effect on the ions is that their confinement time is reduced relative to that of zero potential, and hence the plasma length must be increased to accommodate that change. But as they emerge from the thruster mirror - which serves as a magnetic nozzle - the ions acquire an added energy equal to that of the potential energy, and that in turn manifests itself in increased specific impulse and thrust. We assess the propulsive performance of the GDM thruster, based on the more rigorous theory, by applying it to a round trip Mars mission employing a continuous burn acceleration/deceleration type of trajectory. We find that the length of the device and travel time decrease with increasing plasma density, while the total vehicle mass reaches a minimum at a plasma density of 3 x 1016 cm-3. At such a density, and an initial DT ion temperature of 10 keV, a travel time of 60 days is found to be achievable at GDM propulsion parameters of about 200,000 seconds of specific impulse and approximately 47 kN of thrust.

Kammash, Terry [Department of Nuclear Engineering and Radiological Sciences, University of Michigan, 2355 Bonisteel Blvd, Ann Arbor, MI 48109 (United States); Tang, Ricky [Department of Aerospace Engineering, University Michigan, 1320 Beal Ave, Ann Arbor, MI 48109 (United States)

2005-02-06T23:59:59.000Z

77

Optimal Light Beams and Mirror Shapes for Future LIGO Interferometers  

E-Print Network [OSTI]

We report the results of a recent search for the lowest value of thermal noise that can be achieved in LIGO by changing the shape of mirrors, while fixing the mirror radius and maintaining a low diffractional loss. The result of this minimization is a beam with thermal noise a factor of 2.32 (in power) lower than previously considered Mesa Beams and a factor of 5.45 (in power) lower than the Gaussian beams employed in the current baseline design. Mirrors that confine these beams have been found to be roughly conical in shape, with an average slope approximately equal to the mirror radius divided by arm length, and with mild corrections varying at the Fresnel scale. Such a mirror system, if built, would impact the sensitivity of LIGO, increasing the event rate of observing gravitational waves in the frequency range of maximum sensitivity roughly by a factor of three compared to an Advanced LIGO using Mesa beams (assuming all other noises remain unchanged). We discuss the resulting beam and mirror properties and study requirements on mirror tilt, displacement and figure error, in order for this beam to be used in LIGO detectors.

Mihai Bondarescu; Oleg Kogan; Yanbei Chen

2008-06-14T23:59:59.000Z

78

Magnetic moments of T=3/2 mirror pairs  

SciTech Connect (OSTI)

We predict values of the magnetic moments of T=3/2 proton-rich fp-shell nuclei in the mass range A=43-53, by using known values for their neutron-rich mirrors together with shell-model estimates for small quantities. We extend the analysis to those T=3/2 sd-shell mirror pairs for which both the T{sub z}=-3/2 and T{sub z}=+3/2 magnetic moments have been measured. We find that these obey the same linear relation as previously deduced for T=1/2 mirror pairs.

Perez, S. M. [Department of Physics, University of Cape Town, Private Bag, Rondebosch 7700 (South Africa); iThemba LABS, P. O. Box 722, Somerset West 7129 (South Africa); Richter, W. A. [Department of Physics, University of the Western Cape, Private Bag X17, Bellville 7535 (South Africa); Brown, B. A. [Department of Physics and Astronomy, and National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824-1321 (United States); Horoi, M. [Department of Physics, Central Michigan University, Mount Pleasant, Michigan 48859 (United States)

2010-12-15T23:59:59.000Z

79

Gamma-ray Bursts Produced by Mirror Stars  

E-Print Network [OSTI]

I argue that cosmic Gamma-ray Bursts (GRB) may be produced by collapses or mergers of stars made of `mirror' matter. The mirror neutrinos (which are sterile for our matter) produced at these events can oscillate into ordinary neutrinos. The annihilations or decays of the latter create an electron-positron plasma and subsequent relativistic fireball with a very low baryon load needed for GRBs. The concept of mirror matter is able to explain several key problems of modern astrophysics: neutrino anomalies, the missing mass, MACHO microlensing events and GRBs. Thus this concept becomes very appealing and should be considered quite seriously and attentively.

S. Blinnikov

1999-02-21T23:59:59.000Z

80

Degradation of Back-Surface Acrylic Mirrors for Low Concentration and  

E-Print Network [OSTI]

. Degradation of these mirrors can occur from UV induced photodegradative processes and metallization corrosionDegradation of Back-Surface Acrylic Mirrors for Low Concentration and Mirror on a module. Back-surface mirrors can spectrally filter incoming solar radiation reducing the ultraviolet (UV

Rollins, Andrew M.

Note: This page contains sample records for the topic "appendages mirrors bumpers" 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

Two-Mirror Apodization for High-Contrast Imaging Wesley A. Traub  

E-Print Network [OSTI]

" the secondary mirror in designs of large two- mirror telescopes with fast spherical primaries. As an applicationTwo-Mirror Apodization for High-Contrast Imaging Wesley A. Traub Harvard-Smithsonian Center times needed for planet detection. A recently proposed alternative is to use two mirrors to accomplish

Vanderbei, Robert J.

82

Design and Implementation of the Primary and Secondary Mirror Control System for NST  

E-Print Network [OSTI]

Design and Implementation of the Primary and Secondary Mirror Control System for NST G. Yang*a a by adjusting the figure of primary mirror and the position of the secondary mirror. The Active Optics Control the wavefront sensor and corresponding corrections will be applied to the primary mirror and the secondary

83

Mystic Self: Margery Kempe and the Mirror of Narrative  

E-Print Network [OSTI]

MYSTIC SELF: MARGERY KEMPE AND T H E MIRROR OF NARRATIVEend o f The Book of Margery Kempe, as Margery cries and sobsAll references will be to Margery Kempe, The Book of Margery

Yates, Julian

1995-01-01T23:59:59.000Z

84

inside/out : mirrors for reflective, creative thinking  

E-Print Network [OSTI]

In this document I present three tools for reflective, creative thinking: Pillow-Talk, the NeverEnding Drawing Machine and Calliope. These tools make use of the "distorted mirror" metaphor for self-reflection. They are ...

Portocarrero, Edwina

2011-01-01T23:59:59.000Z

85

Minimizing High Spatial Frequency Residual in Active Space Telescope Mirrors  

E-Print Network [OSTI]

. Miller June 2008 SSL # 4-08 #12;#12;Minimizing High Spatial Frequency Residual in Active Space Telescope Mirrors Thomas Gray, David W. Miller June 2008 SSL # 4-08 This work is based on the unaltered text

86

asymmetric mirror dark: Topics by E-print Network  

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

17 18 19 20 21 22 23 24 25 Next Page Last Page Topic Index 1 GeV Scale Asymmetric Dark Matter from Mirror Universe: Direct Detection and LHC Signatures HEP - Experiment (arXiv)...

87

The Use of Genetic Algorithms in Multilayer Mirror Optimization  

E-Print Network [OSTI]

The Use of Genetic Algorithms in Multilayer Mirror Optimization by Shannon Lunt March 1999.3 Optimization Techniques . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 1.3.1 Local Optimizers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 1.3.2 Global Optimizers

Hart, Gus

88

Lightweight diaphragm mirror module system for solar collectors  

DOE Patents [OSTI]

A mirror module system is provided for accurately focusing solar radiation on a point or a line as defined by an array of solar collectors. Each mirror module includes a flexible membrane stretched over a frame in a manner similar to that of a drum or a trampoline and further includes a silvered glass or plastic mirror for forming an optical reflecting surface. The configuration of the optical reflecting surface is variably adjustable to provide for the accurate focusing of the solar energy on a given collector array, e.g., a point or a linear array arrangement. The flexible mirror-membrane combination is lightweight to facilitate installation and reduce system cost yet structurally strong enough to provide for the precise focusing of the incident solar radiation in a semi-rigid reflector system in which unwanted reflector displacement is minimized.

Butler, Barry L. (Golden, CO)

1985-01-01T23:59:59.000Z

89

Lightweight diaphragm mirror module system for solar collectors  

DOE Patents [OSTI]

A mirror module system is provided for accurately focusing solar radiation on a point or a line as defined by an array of solar collectors. Each mirror module includes a flexible membrane stretched over a frame in a manner similar to that of a drum or a trampoline and further includes a silvered glass or plastic mirror for forming an optical reflecting surface. The configuration of the optical reflecting surface is variably adjustable to provide for the accurate focusing of the solar energy on a given collector array, e.g., a point or a linear array arrangement. The flexible mirror-membrane combination is lightweight to facilitate installation and reduce system cost yet structurally strong enough to provide for the precise focusing of the incident solar radiation in a semi-rigid reflector system in which unwanted reflector displacement is minimized.

Butler, B.L.

1984-01-01T23:59:59.000Z

90

Mechanical Design of the HER Synchrotron Light Monitor Primary Mirror  

SciTech Connect (OSTI)

This paper describes the mechanical design of the primary mirror that images the visible portion of the synchrotron radiation (SR) extracted from the High Energy Ring (HER) of the PEP-II B-Factory. During off-axis operation, the water-cooled GlidCop mirror is subjected to a heat flux in excess of 2000 W/cm2. When on-axis imaging occurs, the heat flux due to scattered SR, resistive wall losses and Higher-Order-Mode (HOM) heating is estimated at 1 W/cm2. The imaging surface is plated with Electroless Nickel to improve its optical characteristics. The design requirements for the primary mirror are listed and discussed. Calculated mechanical distortions and stresses experienced by the mirror during on-axis and off-axis operation will be presented.

Daly, Edward F.; /SLAC; Fisher, Alan S.; Kurita, Nadine R.; Langton, J.; /SLAC

2011-09-14T23:59:59.000Z

91

Electroless nickel and ion-plated protective coatings for silvered glass mirrors  

SciTech Connect (OSTI)

Two methods of protecting second surface silvered glass mirrors from environmental degradation have been evaluated. One method employed silver mirrors overcoated with Al, Ni, 304 stainless steel, Cr, and an Al/Cu alloy prepared by ion-plating. The other method used conventional wet process silver mirrors protected with a thin electroless nickel coating. These mirrors were compared with conventional paint backed silver/copper mirrors after exposure to elevated temperatures and water vapor. The electroless nickel mirrors showed consistently more resistance to these stresses than either the conventional or ion-plated mirrors suggesting that they may provide more durable field service.

Lind, M.A.; Chaudiere, D.A.; Stewart, T.L.

1982-01-01T23:59:59.000Z

92

Mirror of the refined topological vertex from a matrix model  

E-Print Network [OSTI]

We find an explicit matrix model computing the refined topological vertex, starting from its representation in terms of plane partitions. We then find the spectral curve of that matrix model, and thus the mirror symmetry of the refined vertex. With the same method we also find a matrix model for the strip geometry, and we find its mirror curve. The fact that there is a matrix model shows that the refined topological string amplitudes also satisfy the remodeling the B-model construction.

B. Eynard; C. Kozcaz

2011-07-26T23:59:59.000Z

93

Durable Corrosion and Ultraviolet-Resistant Silver Mirror  

DOE Patents [OSTI]

A corrosion and ultra violet-resistant silver mirror for use in solar reflectors; the silver layer having a film-forming protective polymer bonded thereto, and a protective shield overlay comprising a transparent multipolymer film that incorporates a UV absorber. The corrosion and ultraviolet resistant silver mirror retains spectral hemispherical reflectance and high optical clarity throughout the UV and visible spectrum when used in solar reflectors.

Jorgensen, G. J.; Gee, R.

2006-01-24T23:59:59.000Z

94

Wave-particle Interactions In Rotating Mirrors  

SciTech Connect (OSTI)

Wave-particle interactions in E×B rotating plasmas feature an unusual effect: particles are diffused by waves in both potential energy and kinetic energy. This wave-particle interaction generalizes the alpha channeling effect, in which radio frequency waves are used to remove alpha particles collisionlessly at low energy. In rotating plasmas, the alpha particles may be removed at low energy through the loss cone, and the energy lost may be transferred to the radial electric field. This eliminates the need for electrodes in the mirror throat, which have presented serious technical issues in past rotating plasma devices. A particularly simple way to achieve this effect is to use a high azimuthal mode number perturbation on the magnetic field. Rotation can also be sustained by waves in plasmas without a kinetic energy source. This type of wave has been considered for plasma centrifuges used for isotope separation. Energy may also be transferred from the electric field to particles or waves, which may be useful for ion heating and energy generation.

Abraham J. Fetterman and Nathaniel J. Fisch

2011-01-11T23:59:59.000Z

95

Do Mirrors for Gravitational Waves Exist?  

E-Print Network [OSTI]

Thin superconducting films are predicted to be highly reflective mirrors for gravitational waves at microwave frequencies. The quantum mechanical non-localizability of the negatively charged Cooper pairs, which is protected from the localizing effect of decoherence by an energy gap, causes the pairs to undergo non-picturable, non-geodesic motion in the presence of a gravitational wave. This non-geodesic motion, which is accelerated motion through space, leads to the existence of mass and charge supercurrents inside the superconducting film. On the other hand, the decoherence-induced localizability of the positively charged ions in the lattice causes them to undergo picturable, geodesic motion as they are carried along with space in the presence of the same gravitational wave. The resulting separation of charges leads to a virtual plasma excitation within the film that enormously enhances its interaction with the wave, relative to that of a neutral superfluid or any normal matter. The existence of strong mass supercurrents within a superconducting film in the presence of a gravitational wave, dubbed the "Heisenberg-Coulomb effect," implies the specular reflection of a gravitational microwave from a film whose thickness is much less than the London penetration depth of the material, in close analogy with the electromagnetic case. The argument is developed by allowing classical gravitational fields, which obey Maxwell-like equations, to interact with quantum matter, which is described using the BCS and Ginzburg-Landau theories of superconductivity, as well as a collisionless plasma model. Several possible experimental tests of these ideas, including mesoscopic ones, are presented alongside comments on the broader theoretical implications of the central hypothesis.

Stephen J. Minter; Kirk Wegter-McNelly; Raymond Y. Chiao

2009-06-30T23:59:59.000Z

96

Synchrotron radiation damage observations in normal incidence copper mirrors  

SciTech Connect (OSTI)

Water-cooled copper mirrors used at near-normal incidence on two beam lines at the NSLS are observed to undergo severe degradation upon exposure to the direct SR beam. These mirrors are used on beam lines designed to utilize radiation in the wavelength regions longer than 100 nm and are coated with a uv reflection-enhancing coating, consisting of one or more bilayers of aluminum with a MgF/sub 2/ overcoat. Beamline performance degrades very rapidly following installation of a new set of mirrors. Analysis of the mirror surfaces by various non-destructive techniques indicates severe degradation of the coating and surface along the central strip where most of the x-ray power is absorbed from the beam. In one case where the mirror had three bilayer coatings, the outer coating layer has disappeared along the central strip. Rutherford backscatter measurements indicate compositional changes between layers and confirm the existence of a carbon deposit on the surface. Thermal modeling suggests that most of the damage is caused by direct photon interaction, since the temperature rise in the energy deposition region is small.

Takacs, P.Z.; Melendez, J.; Colbert, J.

1985-08-01T23:59:59.000Z

97

Plasma heating and hot ion sustaining in mirror based hybrids  

SciTech Connect (OSTI)

Possibilities of plasma heating and sloshing ion sustaining in mirror based hybrids are briefly reviewed. Sloshing ions, i.e. energetic ions with a velocity distribution concentrated to a certain pitch-angle, play an important role in plasma confinement and generation of fusion neutrons in mirror machines. Neutral beam injection (NBI) is first discussed as a method to generate sloshing ions. Numerical results of NBI modeling for a stellarator-mirror hybrid are analyzed. The sloshing ions could alternatively be sustained by RF heating. Fast wave heating schemes, i.e. magnetic beach, minority and second harmonic heating, are addressed and their similarities and differences are described. Characteristic features of wave propagation in mirror hybrid devices including both fundamental harmonic minority and second harmonic heating are examined. Minority heating is efficient for a wide range of minority concentration and plasma densities; it allows one to place the antenna aside from the hot ion location. A simple-design strap antenna suitable for this has good performance. However, this scenario is appropriate only for light minority ions. The second harmonic heating can be applied for the heavy ion component. Arrangements are similar for minority and second harmonic heating. The efficiency of second harmonic heating is influenced by a weaker wave damping than for minority heating. Numerical calculations show that in a hybrid reactor scaled mirror machine the deuterium sloshing ions could be heated within the minority heating scheme, while the tritium ions could be sustained by second harmonic heating.

Moiseenko, V. E.; Agren, O. [Institute of Plasma Physics, National Science Center 'Kharkiv Institute of Physics and Technology', Akademichna St. 1, 61108 Kharkiv (Ukraine); Uppsala University, Angstroem Laboratory, Division of Electricity, Box 534, SE-75121 Uppsala (Sweden)

2012-06-19T23:59:59.000Z

98

Surface Slope Metrology on Deformable Soft X-ray Mirrors  

SciTech Connect (OSTI)

We report on the current state of surface slope metrology on deformable mirrors for soft x-rays at the Advanced Light Source (ALS). While we are developing techniques for in situ at-wavelength tuning, we are refining methods of ex situvisible-light optical metrology to achieve sub-100-nrad accuracy. This paper reports on laboratory studies, measurements and tuning of a deformable test-KB mirror prior to its use. The test mirror was bent to a much different optical configuration than its original design, achieving a 0.38 micro-radian residual slope error. Modeling shows that in some cases, by including the image conjugate distance as an additional free parameter in the alignment, along with the two force couples, fourth-order tangential shape errors (the so-called bird shape) can be reduced or eliminated.

Yuan, S.; Yashchuk, V.V.; Goldberg, K.A.; Celestre, R.; Church, M.; McKinney, W.R.; Morrison, G.; Warwick, T.

2009-09-18T23:59:59.000Z

99

Surface Slope Metrology on Deformable Soft X-ray Mirrors  

SciTech Connect (OSTI)

We report on the current state of surface slope metrology on deformable mirrors for soft x-rays at the Advanced Light Source (ALS). While we are developing techniques for in situ at-wavelength tuning, we are refining methods of ex situ visible-light optical metrology to achieve sub-100-nrad accuracy. This paper reports on laboratory studies, measurements and tuning of a deformable test-KB mirror prior to its use. The test mirror was bent to a much different optical configuration than its original design, achieving a 0.38 micro-radian residual slope error. Modeling shows that in some cases, by including the image conjugate distance as an additional free parameter in the alignment, along with the two force couples, fourth-order tangential shape errors (the so-called bird shape) can be reduced or eliminated.

Yuan, Sheng; Yashchuk, Valeriy V.; Goldberg, Kenneth A.; Celestre, Rich; Church, Matthew; McKinney, Wayne R.; Morrison, Greg; Warwick, Tony

2010-01-31T23:59:59.000Z

100

Surface Slope Metrology on Deformable Soft X-ray Mirrors  

SciTech Connect (OSTI)

We report on the current state of surface slope metrology on deformable mirrors for soft x-rays at the Advanced Light Source (ALS). While we are developing techniques for in situ at-wavelength tuning, we are refining methods of ex situ visible-light optical metrology to achieve sub-100-nrad accuracy. This paper reports on laboratory studies, measurements and tuning of a deformable test-KB mirror prior to its use. The test mirror was bent to a much different optical configuration than its original design, achieving a 0.38 micro-radian residual slope error. Modeling shows that in some cases, by including the image conjugate distance as an additional free parameter in the alignment, along with the two force couples, fourth-order tangential shape errors (the so-called bird shape) can be reduced or eliminated.

Yuan Sheng; Yashchuk, Valeriy V.; Celestre, Rich; Church, Matthew; McKinney, Wayne R.; Morrison, Greg; Warwick, Tony [Advanced Light Source, Lawrence Berkeley National Laboratory, Berkeley, CA 94720 (United States); Goldberg, Kenneth A. [Center for X-ray Optics, Lawrence Berkeley National Laboratory, Berkeley, CA 94720 (United States)

2010-06-23T23:59:59.000Z

Note: This page contains sample records for the topic "appendages mirrors bumpers" 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

High repetition rate plasma mirror device for attosecond science  

SciTech Connect (OSTI)

This report describes an active solid target positioning device for driving plasma mirrors with high repetition rate ultra-high intensity lasers. The position of the solid target surface with respect to the laser focus is optically monitored and mechanically controlled on the nm scale to ensure reproducible interaction conditions for each shot at arbitrary repetition rate. We demonstrate the target capabilities by driving high-order harmonic generation from plasma mirrors produced on glass targets with a near-relativistic intensity few-cycle pulse laser system operating at 1 kHz. During experiments, residual target surface motion can be actively stabilized down to 47?nm (root mean square), which ensures sub-300-as relative temporal stability of the plasma mirror as a secondary source of coherent attosecond extreme ultraviolet radiation in pump-probe experiments.

Borot, A.; Douillet, D.; Iaquaniello, G.; Lefrou, T.; Lopez-Martens, R. [Laboratoire d'Optique Appliquée, ENSTA-ParisTech, CNRS, Ecole Polytechnique, UMR 7639, 91761 Palaiseau (France)] [Laboratoire d'Optique Appliquée, ENSTA-ParisTech, CNRS, Ecole Polytechnique, UMR 7639, 91761 Palaiseau (France); Audebert, P.; Geindre, J.-P. [Laboratoire pour l'Utilisation des Lasers Intenses, Ecole Polytechnique, CNRS, 91128 Palaiseau Cedex (France)] [Laboratoire pour l'Utilisation des Lasers Intenses, Ecole Polytechnique, CNRS, 91128 Palaiseau Cedex (France)

2014-01-15T23:59:59.000Z

102

Method for providing mirror surfaces with protective strippable polymeric film  

DOE Patents [OSTI]

This invention is a method for forming a protective, strippable, elastomeric film on a highly reflective surface. The method is especially well suited for protecting diamond-machined metallic mirrors, which are susceptible not only to abrasion and mechanical damage but also to contamination and corrosion by various fluids. In a typical use of the invention, a diamond-machined copper mirror surface is coated uniformly with a solution comprising a completely polymerized and completely cured thermoplastic urethane elastomer dissolved in tetrahydrofuran. The applied coating is evaporated to dryness, forming a tough, adherent, impermeable, and transparent film which encapsulates dust and other particulates on the surface. The film may be left in place for many months. When desired, the film may be stripped intact, removing the entrapped particulates and leaving no residue on the mirror surface.

Edwards, Charlene C. (Powell, TN); Day, Jack R. (Oak Ridge, TN)

1980-01-01T23:59:59.000Z

103

Thermal characteristics of a classical solar telescope primary mirror  

E-Print Network [OSTI]

We present a detailed thermal and structural analysis of a 2m class solar telescope mirror which is subjected to a varying heat load at an observatory site. A 3-dimensional heat transfer model of the mirror takes into account the heating caused by a smooth and gradual increase of the solar flux during the day-time observations and cooling resulting from the exponentially decaying ambient temperature at night. The thermal and structural response of two competing materials for optical telescopes, namely Silicon Carbide -best known for excellent heat conductivity and Zerodur -preferred for its extremely low coefficient of thermal expansion, is investigated in detail. The insight gained from these simulations will provide a valuable input for devising an efficient and stable thermal control system for the primary mirror.

Banyal, Ravinder K

2011-01-01T23:59:59.000Z

104

Coil system for a mirror-based hybrid reactor  

SciTech Connect (OSTI)

Two different superconducting coil systems for the SFLM Hybrid study - a quadrupolar mirror based fusion-fission reactor study - are presented. One coil system is for a magnetic field with 2 T at the midplane and a mirror ratio of four. This coil set consists of semiplanar coils in two layers. The alternative coil system is for a downscaled magnetic field of 1.25 T at the midplane and a mirror ratio of four, where a higher {beta} is required to achieve sufficient the neutron production. This coil set has one layer of twisted 3D coils. The 3D coils are expected to be considerably cheaper than the semiplanar, since NbTi superconductors can be used for most coils instead of Nb3Sn due to the lower magnetic field.

Hagnestal, A.; Agren, O.; Moiseenko, V. E. [Uppsala University, Angstroem laboratory, Division of Electricity, Box 534, SE-751 21 Uppsala (Sweden); Institute of Plasma Physics, National Science Center 'Kharkov Institute of Physics and Technology', Akademichna st. 1, 61108 Kharkiv (Ukraine)

2012-06-19T23:59:59.000Z

105

Can mirror matter solve the the cosmological lithium problem?  

SciTech Connect (OSTI)

The abundance of lithium-7 confronts cosmology with a long lasting inconsistency between the predictions of standard Big Bang Nucleosynthesis with the baryonic density determined from the Cosmic Microwave Background observations on the one hand, and the spectroscopic determination of the lithium-7 abundance on the other hand. We investigated the influence of the existence of a mirror world, focusing on models in which mirror neutrons can oscillate into ordinary neutrons. Such a mechanism allows for an effective late time neutron injection, which induces an increase of the destruction of beryllium-7and thus a lower final lithium-7 abundance.

Coc, Alain [Centre de Sciences Nucléaires et de Sciences de la Matière (CSNSM), CNRS/IN2P3, Université Paris Sud 11, UMR 8609, Bâtiment 104, 91405 Orsay Campus (France); Uzan, Jean-Philippe; Vangioni, Elisabeth [Institut d'Astrophysique de Paris, UMR-7095 du CNRS, Université Pierre et Marie Curie, 98 bis bd Arago, 75014 Paris, France and Sorbonne Universités, Institut Lagrange de Paris, 98 bis bd Arago, 75014 Paris (France)

2014-05-02T23:59:59.000Z

106

A Single Atom as a Mirror of an Optical Cavity  

E-Print Network [OSTI]

By tightly focussing a laser field onto a single cold ion trapped in front of a far-distant dielectric mirror, we could observe a quantum electrodynamic effect whereby the ion behaves as the optical mirror of a Fabry-P\\'erot cavity. We show that the amplitude of the laser field is significantly altered due to a modification of the electromagnetic mode structure around the atom in a novel regime in which the laser intensity is already changed by the atom alone. e propose a direct application of this system as a quantum memory for single photons.

G. Hétet; L. Slodi?ka; M. Hennrich; R. Blatt

2011-08-19T23:59:59.000Z

107

Normal incidence x-ray mirror for chemical microanalysis  

DOE Patents [OSTI]

An x-ray mirror for both electron column instruments and micro x-ray fluorescence instruments for making chemical, microanalysis comprises a non-planar mirror having, for example, a spherical reflecting surface for x-rays comprised of a predetermined number of alternating layers of high atomic number material and low atomic number material contiguously formed on a substrate and whose layers have a thickness which is a multiple of the wavelength being reflected. For electron column instruments, the wavelengths of interest lie above 1.5nm, while for x-ray fluorescence instruments, the range of interest is below 0.2nm. 4 figs.

Carr, M.J.; Romig, A.D. Jr.

1987-08-05T23:59:59.000Z

108

ATLAS and CMS hints for a mirror Higgs boson  

E-Print Network [OSTI]

ATLAS and CMS have provided hints for the existence of a Higgs-like particle with mass of about 144 GeV with production cross section into standard decay channels which is about 50% that of the standard model Higgs boson. We show that this 50% suppression is exactly what the mirror matter model predicts when the two scalar mass eigenstates, each required to be maximal admixtures of a standard and mirror-Higgs boson, are separated in mass by more than their decay widths but less than the experimental resolution. We discuss prospects for the future confirmation of this interesting hint for non-standard Higgs physics.

Robert Foot; Archil Kobakhidze; Raymond R. Volkas

2011-11-10T23:59:59.000Z

109

Mirror-induced decoherence in hybrid quantum-classical theory  

E-Print Network [OSTI]

We re-analyse the optomechanical interferometer experiment proposed by Marshall, Simon, Penrose and Bouwmeester with the help of a recently developed quantum-classical hybrid theory. This leads to an alternative evaluation of the mirror induced decoherence. Surprisingly, we find that it behaves essentially in the same way for suitable initial conditions and experimentally relevant parameters, no matter whether the mirror is considered a classical or quantum mechanical object. We discuss the parameter ranges where this result holds and possible implications for a test of spontaneous collapse models, for which this experiment has been designed.

Aniello Lampo; Lorenzo Fratino; Hans-Thomas Elze

2014-10-16T23:59:59.000Z

110

On the Kinematics of Solar Mirrors Using Massively Parallel Binary Actuation  

E-Print Network [OSTI]

Precision mirrors are required for effective solar energy collectors. Manufacturing such mirrors and making them robust to disturbances such as thermal gradients is expensive. In this paper, the use of parallel binary ...

Dubowsky, Steven

111

A color spatial display based on a Raster framebuffer and varifocal mirror  

E-Print Network [OSTI]

A very simple 30 color display has been constructed. It consists of a 20 display viewed in a rapidly vibrating varifocal mirror. The changing focal length of the mirror is responsible for providing the depth; when the ...

Carson, Kenneth M

1985-01-01T23:59:59.000Z

112

Ion implantation for figure correction of high-resolution x-ray telescope mirrors  

E-Print Network [OSTI]

Fabricating mirrors for future high-resolution, large-aperture x-ray telescopes continues to challenge the x-ray astronomy instrumentation community. Building a large-aperture telescope requires thin, lightweight mirrors; ...

Chalifoux, Brandon D

2014-01-01T23:59:59.000Z

113

E-Print Network 3.0 - automatic mirror alignment Sample Search...  

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

for: automatic mirror alignment Page: << < 1 2 3 4 5 > >> 1 The Universe Viewed in Gamma-Rays 1 Mirror Alignment and Optical Quality of the H.E.S.S. Summary: the automatic...

114

Rhodium coated mirrors deposited by magnetron sputtering for fusion applications  

SciTech Connect (OSTI)

Metallic mirrors will be essential components of all optical spectroscopy and imaging systems for ITER plasma diagnostics. Any change in the mirror performance, in particular, its reflectivity, due to erosion of the surface by charge exchange neutrals or deposition of impurities will influence the quality and reliability of the detected signals. Due to its high reflectivity in the visible wavelength range and its low sputtering yield, rhodium appears as an attractive material for first mirrors in ITER. However, the very high price of the raw material calls for using it in the form of a film deposited onto metallic substrates. The development of a reliable technique for the preparation of high reflectivity rhodium films is therefore of the highest importance. Rhodium layers with thicknesses of up to 2 {mu}m were produced on different substrates of interest (Mo, stainless steel, Cu) by magnetron sputtering. Produced films exhibit a low roughness and crystallite size of about 10 nm with a dense columnar structure. No impurities were detected on the surface after deposition. Scratch tests demonstrate that adhesion properties increase with substrate hardness. Detailed optical characterizations of Rh-coated mirrors as well as results of erosion tests performed both under laboratory conditions and in the TEXTOR tokamak are presented in this paper.

Marot, L.; De Temmerman, G.; Oelhafen, P.; Covarel, G.; Litnovsky, A. [Department of Physics, University of Basel, Klingelbergstrasse 82, CH-4056 Basel (Switzerland); Laboratoire Mecanique, Materiaux et Procedes de Fabrication, 61 rue Albert Camus, Universite de Haute-Alsace, F-68093 Mulhouse Cedex (France); Institut fuer Energieforschung (Plasmaphysik), Forschungszentrum Juelich, Association EURATOM-FZJ, D 52425 Juelich (Germany)

2007-10-15T23:59:59.000Z

115

Technical NoteFEASIBILITY STUDIES OF ALPHA-PARTICLE CHANNELING IN MIRROR MACHINES  

E-Print Network [OSTI]

Technical NoteFEASIBILITY STUDIES OF ALPHA-PARTICLE CHANNELING IN MIRROR MACHINES A. I. ZHMOGINOV such as mirror machines can benefit this concept by efficiently redirecting a-particle energy to fuel ion heating designs and for proof-of-principle experiments. KEYWORDS: alpha channeling, mirror machines, ray tracing

116

Debris and Radiation-Induced Damage Effects on EUV Nanolithography Source Collector Mirror Optics Performance  

E-Print Network [OSTI]

Debris and Radiation-Induced Damage Effects on EUV Nanolithography Source Collector Mirror Optics, Argonne, Illinois ABSTRACT Exposure of collector mirrors facing the hot, dense pinch plasma in plasma region of the lamp are known to induce serious damage to nearby collector mirrors. Candidate collector

Harilal, S. S.

117

Search for neutron - mirror neutron oscillations in a laboratory experiment with ultracold neutrons  

E-Print Network [OSTI]

Mirror matter is considered as a candidate for dark matter. In connection with this an experimental search for neutron - mirror neutron (nn') transitions has been carried out using storage of ultracold neutrons in a trap with different magnetic fields. As a result, a new limit for the neutron - mirror neutron oscillation time has been obtained, tau_osc >= 448 s (90% C.L.), assuming that there is no mirror magnetic field larger than 100 nT. Besides a first attempt to obtain some restriction for mirror magnetic field has been done.

A. P. Serebrov; E. B. Aleksandrov; N. A. Dovator; S. P. Dmitriev; A. K. Fomin; P. Geltenbort; A. G. Kharitonov; I. A. Krasnoschekova; M. S. Lasakov; A. N. Murashkin; G. E. Shmelev; V. E. Varlamov; A. V. Vassiljev; O. M. Zherebtsov; O. Zimmer

2008-09-29T23:59:59.000Z

118

Electroless nickel and ion-plated protective coatings for silvered glass mirrors  

SciTech Connect (OSTI)

A preliminary examination of two methods of protecting second surface silvered glass mirrors from environmental degradation is presented. One method employed silver mirrors overcoated with Al, Ni, 304 stainless steel, Cr, or an Al/Cu alloy prepared by ion-plating. The other method used conventional wet process silver mirrors protected with a thin electroless nickel coating. No attempt was made to optimize the coatings for either method. These experimental mirrors were compared with conventional paint backed silver/copper mirrors after exposure to elevated temperatures and water vapor in order to estimate their relative environmental stability. The electroless nickel mirrors showed consistently more resistance to these stresses than either the conventional or ion-plated mirrors, suggesting that they may provide more durable field service.

Lind, M.A.; Chaudiere, D.A.; Dake, L.S.; Stewart, T.L.

1982-04-01T23:59:59.000Z

119

Modeling for deformable mirrors and the adaptive optics optimization program  

SciTech Connect (OSTI)

We discuss aspects of adaptive optics optimization for large fusion laser systems such as the 192-arm National Ignition Facility (NIF) at LLNL. By way of example, we considered the discrete actuator deformable mirror and Hartmann sensor system used on the Beamlet laser. Beamlet is a single-aperture prototype of the 11-0-5 slab amplifier design for NIF, and so we expect similar optical distortion levels and deformable mirror correction requirements. We are now in the process of developing a numerically efficient object oriented C++ language implementation of our adaptive optics and wavefront sensor code, but this code is not yet operational. Results are based instead on the prototype algorithms, coded-up in an interpreted array processing computer language.

Henesian, M.A.; Haney, S.W.; Trenholme, J.B. [Lawrence Livermore National Lab., CA (United States); Thomas, M. [Massachusetts Inst. of Tech., Cambridge, MA (United States). Plasma Fusion Center

1997-03-18T23:59:59.000Z

120

Figure and finish characterization of high performance metal mirrors  

SciTech Connect (OSTI)

Most metal mirrors currently used in synchrotron radiation (SR) beam lines to reflect soft x-rays are made of electroless nickel plate on an aluminum substrate. This material combination has allowed optical designers to incorporate exotic cylindrical aspheres into grazing incidence x-ray beam-handling systems by taking advantage of single-point diamond machining techniques. But the promise of high-quality electroless nickel surfaces has generally exceeded the performance. We will examine the evolution of electroless nickel surfaces through a study of the quality of mirrors delivered for use at the National Synchrotron Light Source over the past seven years. We have developed techniques to assess surface quality based on the measurement of surface roughness and figure errors with optical profiling instruments. It is instructive to see how the quality of the surface is related to the complexity of the machine operations required to produce it.

Takacs, P.Z. [Brookhaven National Lab., Upton, NY (United States); Church, E.L. [Army Armament Research and Development Command, Dover, NJ (United States)

1991-10-01T23:59:59.000Z

Note: This page contains sample records for the topic "appendages mirrors bumpers" 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

Part One: Mirrors; Part Two: Synthesis of Camphor  

E-Print Network [OSTI]

v e r mirrors is regarded as objectionable. Liebig f i r s t noted that s i l v e r could be deposited on glass as a mirror in 1835. He reduced the s i l v e r Silver from the solution of/nitrate i n ammonia with formal­ dehyde . The f i r... s method of depositing copper on glass i s not as nearly i d e a l as some of the methods of de­ po s i t i n g silver,owing to the imperfections that are some times caused by the o i l y decomposition product St the phenylhydrazine, the copper i...

Kent, Robert C.

1908-01-01T23:59:59.000Z

122

Mirror-based fusion: some possible new directions  

SciTech Connect (OSTI)

This paper examines some possible areas for the study of new approaches to fusion research, ones that employ magnetic confinement systems based on open-ended field topology and employing the magnetic mirror principle. In the spirit of encouraging a wider look at possibilities, some unconventional approaches are suggested. These approaches, involving long linear systems having ion injectors and direct converters at their ends, attempt to exploit some inherent advantages of open-ended systems for fusion. The results of analysis, calculations and preliminary cost estimates for long linear systems of this type that utilize the magnetic mirror effect to achieve their operating regimes will be presented. The approaches suggested, when examined in greater depth, may not stand the test of time, but they might encourage thinking in new areas.

Post, R F., LLNL

1998-07-16T23:59:59.000Z

123

Wave-driven Rotation in Supersonically Rotating Mirrors  

SciTech Connect (OSTI)

Supersonic rotation in mirrors may be produced by radio frequency waves. The waves produce coupled diffusion in ion kinetic and potential energy. A population inversion along the diffusion path then produces rotation. Waves may be designed to exploit a natural kinetic energy source or may provide the rotation energy on their own. Centrifugal traps for fusion and isotope separation may benefit from this wave-driven rotation.

A. Fetterman and N.J. Fisch

2010-02-15T23:59:59.000Z

124

Ray chaos in optical cavities based upon standard laser mirrors  

E-Print Network [OSTI]

We present a composite optical cavity made of standard laser mirrors; the cavity consists of a suitable combination of stable and unstable cavities. In spite of its very open nature the composite cavity shows ray chaos, which may be either soft or hard, depending on the cavity configuration. This opens a new, convenient route for experimental studies of the quantum aspects of a chaotic wave field.

A. Aiello; M. P. van Exter; J. P. Woerdman

2003-07-17T23:59:59.000Z

125

Steady mirror structures in a plasma with pressure anisotropy  

E-Print Network [OSTI]

In the first part we present a review of our results concerning the weakly nonlinear regime of the mirror instability in the framework of an asymptotic model. This model belongs to the class of gradient type systems for which the free energy can only decrease in time. It reveals a behavior typical for subcritical bifurcations: below the mirror instability threshold, all localized stationary structures are unstable, while above threshold, the system displays a blow-up behavior. It is shown that taking the electrons into account (non-zero temperature) does not change the structure of the asymptotic model. For bi-Maxwellian distribution functions for both electrons and ions, the model predicts the formation of magnetic holes. The second part contains original results concerning two-dimensional steady mirror structures which can form in the saturated regime. Based on Grad-Shafranov-like equations, a gyrotropic plasma, where the pressures in the static regime are only functions of the amplitude of the local magnet...

Kuznetsov, E A; Ruban, V P; Sulem, P L

2015-01-01T23:59:59.000Z

126

Equations of a Moving Mirror and the Electromagnetic Field  

E-Print Network [OSTI]

We consider a slab of a material that is linear, isotropic, non-magnetizable, ohmic, and electrically neutral when it is at rest. The slab interacts with the electromagnetic field through radiation pressure. Using a relativistic treatment, we deduce the exact equations governing the dynamics of the field and of the slab, as well as, approximate equations to first order in the velocity and the acceleration of the slab. As a consequence of the motion of the slab, the field must satisfy a wave equation with damping and slowly varying coefficients plus terms that are small when the time-scale of the evolution of the mirror is much smaller than that of the field. Moreover, the dynamics of the mirror involve a time-dependent mass arising from the interaction with the field and it is related to the effective mass of mechanical oscillators used in optomechanics. By the same reason, the mirror is subject to a velocity dependent force which is related to the much sought cooling of mechanical oscillators in optomechanics.

Luis Octavio Castaños; Ricardo Weder

2014-10-28T23:59:59.000Z

127

Global sound modes in mirror traps with anisotropic pressure  

SciTech Connect (OSTI)

Global oscillations of inhomogeneous plasma with frequencies close to the bounce frequency of ions in mirror traps have been studied. It has been shown that, in some cases, the sound can be reflected from the axial plasma inhomogeneity. The ideal magnetohydrodynamic (MHD) model with Chew-Goldberger-Low approximation has been utilized to determine conditions of existence of the standing waves in the mirror-confined plasma. Linearized wave equation for the longitudinal plasma oscillations in thin anisotropic inhomogeneous plasma with finite ? has been derived. The wave equation has been treated numerically. The oscillations are studied for the case of the trap with partially filled loss-cone and the trap with sloshing ions. It has been shown that in cells of the multiple-mirror trap standing waves can exist. The frequency of the wave is of the order of the mean bounce-frequency of ions. In the trap with sloshing ions, the mode supported by the pressure of fast ions could exist. The results of oscillations observation in the experiment on the Gas Dynamic Trap have been presented.

Skovorodin, D. I.; Zaytsev, K. V.; Beklemishev, A. D. [Budker Institute of Nuclear Physics, Novosibirsk State University, Novosibirsk 630090 (Russian Federation)] [Budker Institute of Nuclear Physics, Novosibirsk State University, Novosibirsk 630090 (Russian Federation)

2013-10-15T23:59:59.000Z

128

Intermediate Mirrors to Reach Theoretical Efficiency Limits of Multi-Bandgap Solar Cells  

E-Print Network [OSTI]

Creating a single bandgap solar cell that approaches the Shockley-Queisser limit requires a highly reflective rear mirror. This mirror enhances the voltage of the solar cell by providing photons with multiple opportunities for escaping out the front surface. Efficient external luminescence is a pre-requisite for high voltage. Intermediate mirrors in a multijunction solar cell can enhance the voltage for each cell in the stack. These intermediate mirrors need to have the added function of transmitting the below bandgap photons to the next cell in the stack. In this work, we quantitatively establish the efficiency increase possible with the use of intermediate selective reflectors between cells in a tandem stack. The absolute efficiency increase can be up to ~6% in dual bandgap cells with optimal intermediate and rear mirrors. A practical implementation of an intermediate selective mirror is an air gap sandwiched by antireflection coatings. The air gap provides perfect reflection for angles outside the escape c...

Ganapati, Vidya; Yablonovitch, Eli

2014-01-01T23:59:59.000Z

129

Mirror mounts designed for the Advanced Photon Source SRI-CAT  

SciTech Connect (OSTI)

Use of a mirror for beamlines at third-generation synchrotron radiation facilities, such as the Advanced Photon Source (APS) at Argonne National laboratory, has many advantages. A mirror as a first optical component provides significant reduction in the beam peak heat flux and total power on the downstream monochromator and simplifies the bremsstrahlung shielding design for the beamline transport. It also allows one to have a system for multibeamline branching and switching. More generally, a mirror is used for beam focusing and/or low-pass filtering. Six different mirror mounts have been designed for the SRI-CAT beamlines. Four of them are designed as water-cooled mirrors for white or pink beam use, and the other two are for monochromatic beam use. Mirror mount designs, including vacuum vessel structure and precision supporting stages, are presented in this paper.

Shu, D.; Benson, C.; Chang, J. [and others

1997-09-01T23:59:59.000Z

130

A magnetic liquid deformable mirror for high stroke and low order axially symmetrical aberrations  

E-Print Network [OSTI]

We present a new class of magnetically shaped deformable liquid mirrors made of a magnetic liquid (ferrofluid). Deformable liquid mirrors offer advantages with respect to deformable solid mirrors: large deformations, low costs and the possibility of very large mirrors with added aberration control. They have some disadvantages (e.g. slower response time). We made and tested a deformable mirror, producing axially symmetrical wavefront aberrations by applying electric currents to 5 concentric coils made of copper wire wound on aluminum cylinders. Each of these coils generates a magnetic field which combines to deform the surface of a ferrofluid to the desired shape. We have carried out laboratory tests on a 5 cm diameter prototype mirror and demonstrated defocus as well as Seidel and Zernike spherical aberrations having amplitudes up to 20 microns, which was the limiting measurable amplitude of our equipment

Brousseau, D; Parent, J; Ruel, H J; Borra, Ermanno F.; Brousseau, Denis; Parent, Jocelyn; Ruel, Hubert-Jean

2006-01-01T23:59:59.000Z

131

A magnetic liquid deformable mirror for high stroke and low order axially symmetrical aberrations  

E-Print Network [OSTI]

We present a new class of magnetically shaped deformable liquid mirrors made of a magnetic liquid (ferrofluid). Deformable liquid mirrors offer advantages with respect to deformable solid mirrors: large deformations, low costs and the possibility of very large mirrors with added aberration control. They have some disadvantages (e.g. slower response time). We made and tested a deformable mirror, producing axially symmetrical wavefront aberrations by applying electric currents to 5 concentric coils made of copper wire wound on aluminum cylinders. Each of these coils generates a magnetic field which combines to deform the surface of a ferrofluid to the desired shape. We have carried out laboratory tests on a 5 cm diameter prototype mirror and demonstrated defocus as well as Seidel and Zernike spherical aberrations having amplitudes up to 20 microns, which was the limiting measurable amplitude of our equipment

Denis Brousseau; Ermanno F. Borra; Hubert-Jean Ruel; Jocelyn Parent

2006-11-15T23:59:59.000Z

132

Mirror-Field Entanglement in a Microscopic model for Quantum Optomechanics  

E-Print Network [OSTI]

We use a microscopic model, the Mirror-Oscillator-Field (MOF) model proposed by Galley, Behunin and Hu [Phys. Rev. A 87, 043832 (2013)], to describe the quantum entanglement between a mirror's center of mass (CoM) motion and a field. In contrast with the conventional approach where the mirror-field entanglement is understood as arising from the radiation pressure of an optical field inducing the motion of the mirror's CoM, the MOF model incorporates the dynamics of the internal degrees of freedom of the mirror that couple to the optical field directly. The major advantage in this approach is that it provides a self-consistent treatment of the three pertinent subsystems (the mirror's CoM motion, its internal degrees of freedom and the field) including their back-actions on each other, thereby giving a more accurate account of the quantum correlations between the individual subsystems. The optical and the mechanical properties of a mirror arising from its dynamical interaction with a quantum field are obtained without imposing any boundary conditions on the field additionally, as is done in the conventional way. As one of the new physical features that arise from this self-consistent treatment of the coupled optics and mechanics behavior we observe a coherent transfer of quantum correlations from the field to the mirror via its internal degrees of freedom. We find the quantum entanglement between the optical field and the mirror's center of mass motion upon coarse-graining over the internal degree of freedom. Further, we show that in certain parameter regimes the mirror-field entanglement is enhanced when the field interacts resonantly with the mirror's internal degree of freedom, a new result which highlights the importance of including the internal structure of the mirror in quantum optomechanical studies.

Kanupriya Sinha; Shih-Yuin Lin; B. L. Hu

2015-02-02T23:59:59.000Z

133

E-Print Network 3.0 - aspheric mirror fabrication Sample Search...  

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

aspheric mirror fabrication Page: << < 1 2 3 4 5 > >> 1 Contact information: jburge@optics.arizona.edu 520-621-8182 Summary: . FABRICATION AND TESTING Telescopes with faster...

134

High-resolution adaptive optics scanning laser ophthalmoscope with multiple deformable mirrors  

DOE Patents [OSTI]

An adaptive optics scanning laser ophthalmoscopes is introduced to produce non-invasive views of the human retina. The use of dual deformable mirrors improved the dynamic range for correction of the wavefront aberrations compared with the use of the MEMS mirror alone, and improved the quality of the wavefront correction compared with the use of the bimorph mirror alone. The large-stroke bimorph deformable mirror improved the capability for axial sectioning with the confocal imaging system by providing an easier way to move the focus axially through different layers of the retina.

Chen, Diana C. (Fremont, CA); Olivier, Scot S. (Livermore, CA); Jones; Steven M. (Livermore, CA)

2010-02-23T23:59:59.000Z

135

UV-Shifted Durable Silver Coating for Astronomical Mirrors  

SciTech Connect (OSTI)

Silver has the highest reflectance of all of the metals, but it tarnishes in the presence of sulfides, chlorides, and oxides in the atmosphere. Also, the silver reflectance is very low at wavelengths below 400 nm making aluminum more desirable mirror coating for the UV region. They have found a way to prevent silver tarnishing by sandwiching the silver layer between two thin layers of NiCrN{sub x}, and to extend the metal's high reflectance down to 200 nm by depositing the (thin) Ag layer on top of Al. Thus, the uv is transmitted through the thin Ag layer below 400 nm wavelength, and is reflected from the Al layer underneath. This UV-shifted durable coating provides a valuable alternative to the aluminum coating for telescope mirror coatings where high throughput and durability are important considerations. The throughput for a telescope with, say, six reflections from silver coatings is (0.97){sup 6} = 83% compared to (0.92){sup 6} = 60% for aluminum coatings, or 28% less. The use of silver coatings allows more photons to be collected by primary mirror. Aluminum also has a reflectance dip at 850 nm caused by inter-band transitions which is eliminated by placing the thin Ag layer on top. This paper describes a non-tarnishing silver coating having high reflectance down into the UV region. The average specular reflectance is 70%-97% in the near-UV, 95%-99% in the visible region, and {ge} 99% in the infrared region covering the total wavelength range 200 nm to 10,000 nm. Figure 1 compares the reflectance of the UVHR-LLNL silver coating to bare silver and aluminum over-coated with magnesium fluoride over the wavelength range 300 nm to 2000 nm.

Thomas, N.L.; Wolfe, J.

2000-06-01T23:59:59.000Z

136

A HIGH REPETITION PLASMA MIRROR FOR STAGED ELECTRON ACCELERATION  

SciTech Connect (OSTI)

In order to build a compact, staged laser plasma accelerator the in-coupling of the laser beam to the different stages represents one of the key issues. To limit the spatial foot print and thus to realize a high overall acceleration gradient, a concept has to be found which realizes this in-coupling within a few centimeters. We present experiments on a tape-drive based plasma mirror which could be used to reflect the focused laser beam into the acceleration stage.

Sokollik, Thomas; Shiraishi, Satomi; Osterhoff, Jens; Evans, Eugene; Gonsalves, Anthony; Nakamura, Kei; vanTilborg, Jeroen; Lin, Chen; Toth, Csaba; Leemans, Wim

2011-07-22T23:59:59.000Z

137

Compensation for thermal effects in mirrors of Gravitational Wave Interferometers  

E-Print Network [OSTI]

In this paper we study several means of compensating for thermal lensing which, otherwise, should be a source of concern for future upgrades of interferometric detectors of gravitational waves. The methods we develop are based on the principle of heating the cold parts of the mirrors. We find that thermal compensation can help a lot but can not do miracles. It seems finally that the best strategy for future upgrades (``advanced configurations'') is maybe to use thermal compensation together with another substrate materials than Silica, for example Sapphire.

P. Hello

2001-04-18T23:59:59.000Z

138

Modularity, quaternion-Kähler spaces, and mirror symmetry  

SciTech Connect (OSTI)

We provide an explicit twistorial construction of quaternion-Kähler manifolds obtained by deformation of c-map spaces and carrying an isometric action of the modular group SL(2,Z). The deformation is not assumed to preserve any continuous isometry and therefore this construction presents a general framework for describing NS5-brane instanton effects in string compactifications with N= 2 supersymmetry. In this context the modular invariant parametrization of twistor lines found in this work yields the complete non-perturbative mirror map between type IIA and type IIB physical fields.

Alexandrov, Sergei; Banerjee, Sibasish [Université Montpellier 2, Laboratoire Charles Coulomb UMR 5221, F-34095 Montpellier (France)] [Université Montpellier 2, Laboratoire Charles Coulomb UMR 5221, F-34095 Montpellier (France)

2013-10-15T23:59:59.000Z

139

Boron-doped superlattices and Bragg mirrors in diamond  

SciTech Connect (OSTI)

A periodic modulation of the boron doping level of single crystal diamond multilayers over more than three orders of magnitude during epitaxial growth by microwave plasma-enhanced chemical vapor deposition is shown to yield Bragg mirrors in the visible. The thicknesses and doping level of the individual layers were controlled by in situ spectroscopic ellipsometry, enabling to tune the reflectance peak to the wavelength range of diamond color centers, such as NV{sup 0} or NV{sup ?}. The crystalline quality, periodicity, and sharpness of the doping transitions in these doping superlattices over tens of periods were confirmed by high resolution X-ray diffraction.

Fiori, A. [University of Grenoble Alpes, Inst. NEEL, 38042 Grenoble (France); CNRS, Inst. NEEL, 25 rue des Martyrs, 38042 Grenoble (France); National Institute for Materials Science, 1-1 Namiki, Tsukuba, Ibaraki 305-0044 (Japan); Bousquet, J.; Eon, D.; Omnès, F.; Bustarret, E., E-mail: Etienne.bustarret@neel.cnrs.fr [University of Grenoble Alpes, Inst. NEEL, 38042 Grenoble (France); CNRS, Inst. NEEL, 25 rue des Martyrs, 38042 Grenoble (France); Bellet-Amalric, E. [University of Grenoble Alpes, Inst. NEEL, 38042 Grenoble (France); CEA-Grenoble, INAC/SP2M, 17 rue des Martyrs, 38054 Grenoble (France)

2014-08-25T23:59:59.000Z

140

Conifold singularities, resumming instantons and non-perturbative mirror symmetry  

E-Print Network [OSTI]

We determine the instanton corrected hypermultiplet moduli space in type IIB compactifications near a Calabi-Yau conifold point where the size of a two-cycle shrinks to zero. We show that D1-instantons resolve the conifold singularity caused by worldsheet instantons. Furthermore, by resumming the instanton series, we reproduce exactly the results obtained by Ooguri and Vafa on the type IIA side, where membrane instantons correct the hypermultiplet moduli space. Our calculations therefore establish that mirror symmetry holds non-perturbatively in the string coupling.

Frank Saueressig; Stefan Vandoren

2007-04-26T23:59:59.000Z

Note: This page contains sample records for the topic "appendages mirrors bumpers" 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

Hidden Photon Dark Matter Search with a Large Metallic Mirror  

E-Print Network [OSTI]

If Dark Matter is composed of hidden-sector photons that kinetically mix with photons of the visible sector, then Dark Matter has a tiny oscillating electric field component. Its presence would lead to a small amount of visible radiation being emitted from a conducting surface, with the photon frequency given approximately by the mass of the hidden photon. Here, we report on experimental efforts that have started recently to search for such hidden photon Dark Matter in the (sub-)eV regime with a prototype mirror for the Auger fluorescence detector at the Karlsruhe Institute for Technology.

Babette Döbrich; Kai Daumiller; Ralph Engel; Marek Kowalski; Axel Lindner; Javier Redondo; Markus Roth

2014-10-01T23:59:59.000Z

142

3d mirror symmetry as a canonical transformation  

E-Print Network [OSTI]

We generalize the free Fermi-gas formulation of certain 3d ${\\cal N}=3$ supersymmetric Chern-Simons-matter theories by allowing Fayet-Iliopoulos couplings as well as mass terms for bifundamental matter fields. The resulting partition functions are given by simple modifications of the argument of the Airy function found previously. With these extra parameters it is easy to see that mirror-symmetry corresponds to linear canonical transformations on the phase space (or operator algebra) of the 1-dimensional fermions.

Drukker, Nadav

2015-01-01T23:59:59.000Z

143

Use of diamond-turned mirrors for synchrotron radiation (SR)  

SciTech Connect (OSTI)

The diamond turning technique has great interest for users of synchrotron radiation because of its ability to produce surfaces of arbitrary shape. It also has the advantage of being well adapted to producing metal optics. These are of interest because they lend themselves to water cooling and hence represent one approach to the problem of high synchrotron radiation power loadings on optical surfaces. The optical figure produced by diamond turning is generally adequate for synchrotron radiation applications. The main difficulty centers around the question of smoothness. Diamond turned surfaces must receive a final polish after machining before they are sufficiently smooth for use with ultra-violet or x-ray radiation. The manufacturing stages can be carried out by various groups in the optics industry and the National Synchrotron Light Source has procured a considerable number of mirrors and is having them polished for use on the vuv storage ring. At the time of writing one mirror has been completed and evaluated and we give the results for this and discuss the indications for the future. The important measurement of the r.m.s. height of the surface roughness has given a value of 3 +- 0.9A using total integrated scatter of visible light at normal incidence.

Howells, M.R.; Takacs, P.Z.

1981-01-01T23:59:59.000Z

144

An optically trapped mirror for reaching the standard quantum limit  

E-Print Network [OSTI]

The preparation of a mechanical oscillator driven by quantum back-action is a fundamental requirement to reach the standard quantum limit (SQL) for force measurement, in optomechanical systems. However, thermal fluctuating force generally dominates a disturbance on the oscillator. In the macroscopic scale, an optical linear cavity including a suspended mirror has been used for the weak force measurement, such as gravitational-wave detectors. This configuration has the advantages of reducing the dissipation of the pendulum (i.e., suspension thermal noise) due to a gravitational dilution by using a thin wire, and of increasing the circulating laser power. However, the use of the thin wire is weak for an optical torsional anti-spring effect in the cavity, due to the low mechanical restoring force of the wire. Thus, there is the trade-off between the stability of the system and the sensitivity. Here, we describe using a triangular optical cavity to overcome this limitation for reaching the SQL. The triangular cavity can provide a sensitive and stable system, because it can optically trap the mirror's motion of the yaw, through an optical positive torsional spring effect. To show this, we demonstrate a measurement of the torsional spring effect caused by radiation pressure forces.

Nobuyuki Matsumoto; Yuta Michimura; Yoichi Aso; Kimio Tsubono

2014-05-19T23:59:59.000Z

145

Design study of 8 meter monolithic mirror UV/optical space telescope H. Philip Stahl  

E-Print Network [OSTI]

Design study of 8 meter monolithic mirror UV/optical space telescope H. Philip Stahl NASA Marshall Space Flight Center, Huntsville, AL 35812 ABSTRACT The planned Ares V launch vehicle with its 10 meter to 8 meter class monolithic primary mirror telescope to Sun-Earth L2 using an Ares V. Specific

Sirianni, Marco

146

Therm-optic analysis of bi-metallic mirrors Daniel Vukobratovich and Allen Gerzoff  

E-Print Network [OSTI]

plated with electroless nickel to reduce light scattering. The thermal coefficient of expansion of electroless nickel, 13.5 x 10-6 m/m-K, is significantly different from that of a typical mirror substrate in an electroless nickel plated mirror, which can induce optical surface distortion. Possible solutions to the "bi

147

Wind buffeting effects on the Gemini 8m primary mirrors M. K. Cho1,2  

E-Print Network [OSTI]

Wind buffeting effects on the Gemini 8m primary mirrors M. K. Cho1,2 , L. Stepp1 , and S. Kim3 and Mechanical Engineering, University of Arizona, 1130 N. Mountain, Tucson, AZ 85721 #12;Wind buffeting effects mirror distortion caused by wind pressure variations. To quantify telescope wind loading effects

148

header for SPIE use Performance of the Far Ultraviolet Spectroscopic Explorer mirror  

E-Print Network [OSTI]

are coated with silicon carbide (SiC) and two are coated with lithium fluoride over aluminum (Al:LiF). We of the SiC­ and Al:LiF­coated mirrors decreased about 6% and 3%, respectively, between coating and launch a two­stage planetary gear train. We also discuss the mechanical performance of the mirror assemblies

149

header for SPIE use Performance of the Far Ultraviolet Spectroscopic Explorer mirror  

E-Print Network [OSTI]

are coated with silicon carbide (SiC) and two are coated with lithium fluoride over aluminum (Al:LiF). We of the SiC- and Al:LiF-coated mirrors decreased about 6% and 3%, respectively, between coating and launch a two-stage planetary gear train. We also discuss the mechanical performance of the mirror assemblies

150

GDT-based neutron source with multiple-mirror end plugs  

SciTech Connect (OSTI)

We present a new linear trap to be built at the Budker Institute. It combines gasdynamictype central cell with sloshing ions for beam fusion and the multiple-mirror end plugs for improved axial confinement. Thus it is designed as an efficient neutron source and a testbed for future development of mirror-based fusion reactors.

Beklemishev, A.; Anikeev, A.; Burdakov, A.; Ivanov, A.; Ivanov, I.; Postupaev, V.; Sinitsky, S. [Budker Institute of Nuclear Physics, Novosibirsk (Russian Federation)

2012-06-19T23:59:59.000Z

151

High damage-resistant Mo mirror for high-power TEA CO/sub 2/ laser systems  

SciTech Connect (OSTI)

A high-purity molybdenum (Mo) mirror was developed by an electron-beam melting method (e.b.m. Mo mirror). For high-power TEA CO/sub 2/ laser, the e.b.m. Mo mirror has two to four times higher surface damage threshold than that of an Au-coated glass mirror and three times longer lifetime than that of a powder metallurgy Mo mirror (p.m. Mo mirror) when laser energy density lower than 60 J/cm/sup 2/ was irradiated with a 0.5-pps repetition rate. It was found that the difference between the e.b.m. Mo mirror and the p.m. Mo mirror at the laser-damage threshold was due to the five surface without voids and the small amount of impurities.

Ichikawa, Y.; Yoshida, K.; Tsunawaki, Y.; Yamanaka, M.; Yamanaka, T.; Yamanaka, C.; Okamoto, H.; Matsusue, N.; Kitajima, K.

1987-09-01T23:59:59.000Z

152

Opto-thermal analysis of a lightweighted mirror for solar telescope  

E-Print Network [OSTI]

In this paper, an opto-thermal analysis of a moderately heated lightweighted solar telescope mirror is carried out using 3D finite element analysis (FEA). A physically realistic heat transfer model is developed to account for the radiative heating and energy exchange of the mirror with surroundings. The numerical simulations show the non-uniform temperature distribution and associated thermo-elastic distortions of the mirror blank clearly mimicking the underlying discrete geometry of the lightweighted substrate. The computed mechanical deformation data is analyzed with surface polynomials and the optical quality of the mirror is evaluated with the help of a ray-tracing software. The thermal print-through distortions are further shown to contribute to optical figure changes and mid-spatial frequency errors of the mirror surface. A comparative study presented for three commonly used substrate materials, namely, Zerodur, Pyrex and Silicon Carbide (SiC) is relevant to vast area of large optics requirements in gro...

Banyal, Ravinder K; Chatterjee, S

2013-01-01T23:59:59.000Z

153

Design of Optical Metamaterial Mirror with Metallic Nanoparticles for Broadband Light Absorption in Graphene Optoelectronic Devices  

E-Print Network [OSTI]

A general metallic mirror (i.e., a flat metallic surface) has been a popular optical component that can contribute broadband light absorption to thin-film optoelectronic devices; nonetheless, such electric mirror with a reversal of reflection phase inevitably causes the problem of minimized electric field near at the mirror surface (maximized electric field at one quarter of wavelength from mirror). This problem becomes more elucidated, when the deep-subwavelength-scaled two-dimensional (2D) material (e.g., graphene and molybdenum disulfide) is implemented into optoelectronic device as an active channel layer. The purpose of this work was to conceive the idea for using a charge storage layer (spherical Au nanoparticles (AuNPs), embedded into dielectric matrix) of the floating-gate graphene photodetector as a magnetic mirror, which allows the device to harness the increase in broadband light absorption. In particular, we systematically examined whether the versatile assembly of spherical AuNP monolayer within ...

Lee, Seungwoo

2015-01-01T23:59:59.000Z

154

Economic Mass Producible Mirror Panels for Solar Concentrators G Johnston, G. Burgess, K. Lovegrove and A. Luzzi  

E-Print Network [OSTI]

Economic Mass Producible Mirror Panels for Solar Concentrators G Johnston, G. Burgess, K. Lovegrove to the success of all solar concentrators of this nature are cost effective and durable mirror panel components World Solar Congress 743 #12;Economic Mass Producible Mirror Panels for Solar Concentrators Johnston

155

All solid-state SBS phase conjugate mirror  

DOE Patents [OSTI]

A stimulated Brillouin scattering (SBS) phase conjugate laser mirror uses a solid-state nonlinear gain medium instead of the conventional liquid or high pressure gas medium. The concept has been effectively demonstrated using common optical-grade fused silica. An energy threshold of 2.5 mJ and a slope efficiency of over 90% were achieved, resulting in an overall energy reflectivity of >80% for 15 ns, 1 um laser pulses. The use of solid-state materials is enabled by a multi-pass resonant architecture which suppresses transient fluctuations that would otherwise result in damage to the SBS medium. This all solid state phase conjugator is safer, more reliable, and more easily manufactured than prior art designs. It allows nonlinear wavefront correction to be implemented in industrial and defense laser systems whose operating environments would preclude the introduction of potentially hazardous liquids or high pressure gases. 8 figs.

Dane, C.B.; Hackel, L.A.

1999-03-09T23:59:59.000Z

156

All solid-state SBS phase conjugate mirror  

DOE Patents [OSTI]

A stimulated Brillouin scattering (SBS) phase conjugate laser mirror uses a solid-state nonlinear gain medium instead of the conventional liquid or high pressure gas medium. The concept has been effectively demonstrated using common optical-grade fused silica. An energy threshold of 2.5 mJ and a slope efficiency of over 90% were achieved, resulting in an overall energy reflectivity of >80% for 15 ns, 1 um laser pulses. The use of solid-state materials is enabled by a multi-pass resonant architecture which suppresses transient fluctuations that would otherwise result in damage to the SBS medium. This all solid state phase conjugator is safer, more reliable, and more easily manufactured than prior art designs. It allows nonlinear wavefront correction to be implemented in industrial and defense laser systems whose operating environments would preclude the introduction of potentially hazardous liquids or high pressure gases.

Dane, Clifford B. (Livermore, CA); Hackel, Lloyd A. (Livermore, CA)

1999-01-01T23:59:59.000Z

157

Mirror Symmetry and Other Miracles in Superstring Theory  

E-Print Network [OSTI]

The dominance of string theory in the research landscape of quantum gravity physics (despite any direct experimental evidence) can, I think, be justified in a variety of ways. Here I focus on an argument from mathematical fertility, broadly similar to Hilary Putnam's 'no miracles argument' that, I argue, many string theorists in fact espouse. String theory leads to many surprising, useful, and well-confirmed mathematical 'predictions' - here I focus on mirror symmetry. These predictions are made on the basis of general physical principles entering into string theory. The success of the mathematical predictions are then seen as evidence for framework that generated them. I attempt to defend this argument, but there are nonetheless some serious objections to be faced. These objections can only be evaded at a high (philosophical) price.

Dean Rickles

2010-04-26T23:59:59.000Z

158

Gamma Ray Mirrors for Direct Measurement of Spent Nuclear Fuel  

SciTech Connect (OSTI)

Direct measurement of the amount of Pu and U in spent nuclear fuel represents a challenge for the safeguards community. Ideally, the characteristic gamma-ray emission lines from different isotopes provide an observable suitable for this task. However, these lines are generally lost in the fierce flux of radiation emitted by the fuel. The rates are so high that detector dead times limit measurements to only very small solid angles of the fuel. Only through the use of carefully designed view ports and long dwell times are such measurements possible. Recent advances in multilayer grazing-incidence gamma-ray optics provide one possible means of overcoming this difficulty. With a proper optical and coating design, such optics can serve as a notch filter, passing only narrow regions of the overall spectrum to a fully shielded detector that does not view the spent fuel directly. We report on the design of a mirror system and a number of experimental measurements.

Pivovaroff, Dr. Michael J. [Lawrence Livermore National Laboratory (LLNL)] [Lawrence Livermore National Laboratory (LLNL); Ziock, Klaus-Peter [ORNL] [ORNL; Harrison, Mark J [ORNL] [ORNL; Soufli, Regina [Lawrence Livermore National Laboratory (LLNL)] [Lawrence Livermore National Laboratory (LLNL)

2014-01-01T23:59:59.000Z

159

Mechanical Loss in Tantala/Silica Dielectric Mirror Coatings  

E-Print Network [OSTI]

Current interferometric gravitational wave detectors use test masses with mirror coatings formed from multiple layers of dielectric materials, most commonly alternating layers of SiO2 (silica) and Ta2O5 (tantala). However, mechanical loss in the Ta2O5/SiO2 coatings may limit the design sensitivity for advanced detectors. We have investigated sources of mechanical loss in the Ta2O5/SiO2 coatings, including loss associated with the coating-substrate interface, with the coating-layer interfaces, and with the bulk material. Our results indicate that the loss is associated with the bulk coating materials and that the loss of Ta2O5 is substantially larger than that of SiO2.

Steven D. Penn; Peter H. Sneddon; Helena Armandula; Joseph C. Betzwieser; Gianpietro Cagnoli; Jordan Camp; D. R. M. Crooks; Martin M. Fejer; Andri M. Gretarsson; Gregory M. Harry; Jim Hough; Scott E. Kittelberger; Michael J. Mortonson; Roger Route; Sheila Rowan; Christophoros C. Vassiliou

2003-02-24T23:59:59.000Z

160

Status of NIF mirror technologies for completion of the NIF facility  

SciTech Connect (OSTI)

The 1600 mirrors required for the National Ignition Facility (NIF) are now coated with the last optics currently being installed. The combined surface area of the NIF mirrors is almost 450 square meters, roughly 3.4 times greater than the surface area of the two Keck primary mirrors. Additionally, the power handling specification of NIF mirrors is 19 orders of magnitude greater than that of the Keck mirrors. The NIF laser will be at least 40x greater energy than the previous LLNL fusion laser called NOVA. To manufacture these mirrors, a number of new technologies (electrolytic in-situ dressing, ion figuring, source stabilization) were used that were not available for previous fusion laser optics. Post deposition technologies designed to increase laser resistance (off-line laser conditioning, solarization, air knives) have also been utilized. This paper summarizes the differences in technologies used to manufacture NIF mirrors from those used for previous fusion lasers and examines potential future technologies that would enable higher fluence operations and extend lifetimes.

Stolz, C J

2008-08-07T23:59:59.000Z

Note: This page contains sample records for the topic "appendages mirrors bumpers" 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

TeV Scale Quantum Gravity and Mirror Supernovae as Sources of Gamma Ray Bursts  

E-Print Network [OSTI]

Mirror matter models have been suggested recently as an explanation of neutrino puzzles and microlensing anomalies. We show that mirror supernovae can be a copious source of energetic gamma rays if one assumes that the quantum gravity scale is in the TeV range. We show that under certain assumptions plausible in the mirror models, the gamma energies could be degraded to the 10 MeV range (and perhaps even further) so as to provide an explanation of observed gamma ray bursts. This mechanism for the origin of the gamma ray bursts has the advantage that it neatly avoids the ``baryon load problem''.

R. N. Mohapatra; S. Nussinov; V. L. Teplitz

1999-09-22T23:59:59.000Z

162

Sagnac interferometry as a probe to the commutation relation of a macroscopic quantum mirror  

SciTech Connect (OSTI)

Single photon Sagnac interferometry as a probe to macroscopic quantum mechanics is considered at the theoretical level. For a freely moving macroscopic quantum mirror susceptible to radiation pressure force inside a Sagnac interferometer, a careful analysis of the input-output relation reveals that the particle spectrum readout at the bright and dark ports encode information concerning the noncommutativity of position and momentum of the macroscopic mirror. A feasible experimental scheme to probe the commutation relation of a macroscopic quantum mirror is outlined to explore the possible frontier between classical and quantum regimes. In the Appendix, the case of Michelson interferometry as a feasible probe is also sketched.

Yang Ran; Gong Xuefei; Pei Shouyong; Luo Ziren; Lau, Y. K. [Physics Department, Huazhong University of Science and Technology, Wuhan 430074 (China); Institute of High Energy Physics, Theoretical Physics Center for Science Facilities, Chinese Academy of Sciences, Beijing 100049 (China); Physics Department, Beijing Normal University, Beijing 100875 (China); Institute of Mechanics, Chinese Academy of Sciences, 15, Beisihuanxi road, Beijing 100190 (China); Institute of Applied Mathematics, Academy of Mathematics and System Science, Chinese Academy of Sciences, 55, Zhongguancun Donglu, Beijing 100190 (China)

2010-09-15T23:59:59.000Z

163

Fabrication of mitigation pits for improving laser damage resistance in dielectric mirrors by femtosecond laser machining  

SciTech Connect (OSTI)

Femtosecond laser machining is used to create mitigation pits to stabilize nanosecond laser-induced damage in multilayer dielectric mirror coatings on BK7 substrates. In this paper, we characterize features and the artifacts associated with mitigation pits and further investigate the impact of pulse energy and pulse duration on pit quality and damage resistance. Our results show that these mitigation features can double the fluence-handling capability of large-aperture optical multilayer mirror coatings and further demonstrate that femtosecond laser macromachining is a promising means for fabricating mitigation geometry in multilayer coatings to increase mirror performance under high-power laser irradiation.

Wolfe, Justin E.; Qiu, S. Roger; Stolz, Christopher J.

2011-03-20T23:59:59.000Z

164

Anisotropy and crystal orientation of silicon--application to the modeling of a bent mirror  

SciTech Connect (OSTI)

Matrix formula and MATLAB algorithm are proposed to calculate the stiffness coefficient matrix C, the Young's modulus, shear modulus and Poisson ratio for the silicon crystal in any orientation. Results for Si(110) and Si(311) are given as an example. The anisotropic material properties of the silicon have been used in the mirror width profile optimization for the nano-imaging end-station ID22NI at the ESRF. As the Si(110) is used as the substrate of this multilayer coated KB mirror, the silicon crystal axis [0 0 1] is proposed to orient to the mirror axis. This is the case to have low stress in the mirror and low bending forces from actuators.

Zhang Lin [European Synchrotron Radiation Facility, BP 220, F-38043 Grenoble Cedex (France)

2010-06-23T23:59:59.000Z

165

Stimulated Brillouin scattering mirror system, high power laser and laser peening method and system using same  

DOE Patents [OSTI]

A laser system, such as a master oscillator/power amplifier system, comprises a gain medium and a stimulated Brillouin scattering SBS mirror system. The SBS mirror system includes an in situ filtered SBS medium that comprises a compound having a small negative non-linear index of refraction, such as a perfluoro compound. An SBS relay telescope having a telescope focal point includes a baffle at the telescope focal point which blocks off angle beams. A beam splitter is placed between the SBS mirror system and the SBS relay telescope, directing a fraction of the beam to an alternate beam path for an alignment fiducial. The SBS mirror system has a collimated SBS cell and a focused SBS cell. An adjustable attenuator is placed between the collimated SBS cell and the focused SBS cell, by which pulse width of the reflected beam can be adjusted.

Dane, C. Brent (Livermore, CA); Hackel, Lloyd (Livermore, CA); Harris, Fritz B. (Rocklin, CA)

2007-04-24T23:59:59.000Z

166

Method for pulse control in a laser including a stimulated brillouin scattering mirror system  

DOE Patents [OSTI]

A laser system, such as a master oscillator/power amplifier system, comprises a gain medium and a stimulated Brillouin scattering SBS mirror system. The SBS mirror system includes an in situ filtered SBS medium that comprises a compound having a small negative non-linear index of refraction, such as a perfluoro compound. An SBS relay telescope having a telescope focal point includes a baffle at the telescope focal point which blocks off angle beams. A beam splitter is placed between the SBS mirror system and the SBS relay telescope, directing a fraction of the beam to an alternate beam path for an alignment fiducial. The SBS mirror system has a collimated SBS cell and a focused SBS cell. An adjustable attenuator is placed between the collimated SBS cell and the focused SBS cell, by which pulse width of the reflected beam can be adjusted.

Dane, C. Brent (Livermore, CA); Hackel, Lloyd (Livermore, CA); Harris, Fritz B. (Rocklin, CA)

2007-10-23T23:59:59.000Z

167

Synfuels from fusion: producing hydrogen with the Tandem Mirror Reactor and thermochemical cycles  

SciTech Connect (OSTI)

This volume contains the following sections: (1) the Tandem Mirror fusion driver, (2) the Cauldron blanket module, (3) the flowing microsphere, (4) coupling the reactor to the process, (5) the thermochemical cycles, and (6) chemical reactors and process units. (MOW)

Werner, R.W.; Ribe, F.L.

1981-01-21T23:59:59.000Z

168

A point-scanning confocal system features multiple laser lines, galvanometric scanning mirrors, beamsplitters, and  

E-Print Network [OSTI]

molecules with novel imaging strategies reveals molecular dynamics. Photoactivatable fluorophores (which mirrors, beamsplitters, and dichroic elements to guide excitation and emission light on their respective in order to follow their dynamics. FRAP (fluorescence recovery after photobleaching) uses intense

Napp, Nils

169

A DISCUSSION OF HEAT MIRROR FILM: PERFORMANCE, PRODUCTION PROCESS, AND COST ESTIMATES  

E-Print Network [OSTI]

transfer thnough a window by using Intrex film as a heatwindow construction will be PROCESS DESCRIPTION Intrex filmWindows and Lighting Program Building 90, Room 2056 Lawrence Berkeley Laboratory Berkeley, California -ii- A DISCUSSION OF HEAT MIRROR FILM:

Levin, B. P.

2011-01-01T23:59:59.000Z

170

Robust relativistic electron mirrors in laser wakefields for enhanced Thomson backscattering  

SciTech Connect (OSTI)

By adopting an up-ramp density profile, we propose to generate relativistic electron mirrors from laser-driven underdense plasma waves, which are insensitive to finite thermal temperature within a certain range. Along the density ramp, premature wavebreaking due to thermal effects is shown to be well mitigated. Under sufficiently high amplitudes of wake excitation, overcritical dense electron mirrors can pile up when approaching the end of the up-ramp. The consequent mirror speed can be stably driven to the group velocity of the laser propagating in a corresponding uniform plasma. Compared with using purely uniform but thermal plasmas, the present thermal-insensitive mirrors can provide enhanced scattering efficiency and spectral upshift for a counter-propagating probe pulse. These observations are confirmed by multi-dimensional particle-in-cell simulations.

Mu, Jie; Li, Fei-Yu; Zeng, Ming; Chen, Min [Key Laboratory for Laser Plasmas (MoE) and Department of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai 200240 (China)] [Key Laboratory for Laser Plasmas (MoE) and Department of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai 200240 (China); Sheng, Zheng-Ming [Key Laboratory for Laser Plasmas (MoE) and Department of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai 200240 (China) [Key Laboratory for Laser Plasmas (MoE) and Department of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai 200240 (China); SUPA, Department of Physics, University of Strathclyde, Glasgow G4 0NG (United Kingdom); Zhang, Jie [Key Laboratory for Laser Plasmas (MoE) and Department of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai 200240 (China) [Key Laboratory for Laser Plasmas (MoE) and Department of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai 200240 (China); Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, CAS, Beijing 100190 (China)

2013-12-23T23:59:59.000Z

171

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

172

Flexural Stiffnesses of and Dimensional Stability in Circular Quasi-isotropic Laminate Mirrors  

E-Print Network [OSTI]

buffer layers on composite mirrors for high surface smoothness. In this dissertation document, radial stiffness associated with stacking sequence effects in quasi-isotropic laminates (pi/n, where n=3, 4, and 6) and dimensional stability in the composite...

Kim, Kyungpyo

2009-01-01T23:59:59.000Z

173

Minimizing Actuator-Induced Residual Error in Active Space Telescope Primary Mirrors  

E-Print Network [OSTI]

. Smith, David W. Miller September 2010 SSL #12-10 #12;#12;Minimizing Actuator-Induced Residual Error in Active Space Telescope Primary Mirrors Matthew W. Smith, David W. Miller September 2010 SSL #12

174

Design of a small fast steering mirror for airborne and aerospace applications  

E-Print Network [OSTI]

This thesis presents the analysis and design of a small advanced fast steering mirror (sAFSM) for airborne and aerospace platforms. The sAFSM provides feedback-controlled articulation of two rotational axes for precision ...

Boulet, Michael Thomas

2008-01-01T23:59:59.000Z

175

Design and Characterization of a Field-Switchable Nanomagnetic Atom Mirror  

E-Print Network [OSTI]

We present a design for a switchable nanomagnetic atom mirror formed by an array of 180{\\deg} domain walls confined within Ni80Fe20 planar nanowires. A simple analytical model is developed which allows the magnetic field produced by the domain wall array to be calculated. This model is then used to optimize the geometry of the nanowires so as to maximize the reflectivity of the atom mirror. We then describe the fabrication of a nanowire array and characterize its magnetic behavior using magneto-optic Kerr effect magnetometry, scanning Hall probe microscopy and micromagnetic simulations, demonstrating how the mobility of the domain walls allow the atom mirror to be switched "on" and "off" in a manner which would be impossible for conventional designs. Finally, we model the reflection of 87Rb atoms from the atom mirror's surface, showing that our design is well suited for investigating interactions between domain walls and cold atoms.

Hayward, T J; Weatherill, K J; Curran, P J; Fry, P W; Fundi, P M; Gibbs, M R J; Schrefl, T; Adams, C S; Hughes, I G; Bending, S J; Allwood, D A

2010-01-01T23:59:59.000Z

176

Planar feasibility study for primary mirror control of large imaging space systems using binary actuators  

E-Print Network [OSTI]

The greatest discoveries in astronomy have come with advancements in ground-based observatories and space telescopes. Latest trends in ground-based observatories have been ever increasing size of the primary mirror, providing ...

Lee, Seung Jae, S.M. Massachusetts Institute of Technology

2010-01-01T23:59:59.000Z

177

Integrated fiber-mirror ion trap for strong ion-cavity coupling  

SciTech Connect (OSTI)

We present and characterize fiber mirrors and a miniaturized ion-trap design developed to integrate a fiber-based Fabry-Perot cavity (FFPC) with a linear Paul trap for use in cavity-QED experiments with trapped ions. Our fiber-mirror fabrication process not only enables the construction of FFPCs with small mode volumes, but also allows us to minimize the influence of the dielectric fiber mirrors on the trapped-ion pseudopotential. We discuss the effect of clipping losses for long FFPCs and the effect of angular and lateral displacements on the coupling efficiencies between cavity and fiber. Optical profilometry allows us to determine the radii of curvature and ellipticities of the fiber mirrors. From finesse measurements, we infer a single-atom cooperativity of up to 12 for FFPCs longer than 200??m in length; comparison to cavities constructed with reference substrate mirrors produced in the same coating run indicates that our FFPCs have similar scattering losses. We characterize the birefringence of our fiber mirrors, finding that careful fiber-mirror selection enables us to construct FFPCs with degenerate polarization modes. As FFPCs are novel devices, we describe procedures developed for handling, aligning, and cleaning them. We discuss experiments to anneal fiber mirrors and explore the influence of the atmosphere under which annealing occurs on coating losses, finding that annealing under vacuum increases the losses for our reference substrate mirrors. X-ray photoelectron spectroscopy measurements indicate that these losses may be attributable to oxygen depletion in the mirror coating. Special design considerations enable us to introduce a FFPC into a trapped ion setup. Our unique linear Paul trap design provides clearance for such a cavity and is miniaturized to shield trapped ions from the dielectric fiber mirrors. We numerically calculate the trap potential in the absence of fibers. In the experiment additional electrodes can be used to compensate distortions of the potential due to the fibers. Home-built fiber feedthroughs connect the FFPC to external optics, and an integrated nanopositioning system affords the possibility of retracting or realigning the cavity without breaking vacuum.

Brandstätter, B., E-mail: birgit.brandstaetter@uibk.ac.at; Schüppert, K.; Casabone, B.; Friebe, K.; Stute, A.; Northup, T. E. [Institut für Experimentalphysik, Universität Innsbruck, 6020 Innsbruck (Austria)] [Institut für Experimentalphysik, Universität Innsbruck, 6020 Innsbruck (Austria); McClung, A. [Institut für Experimentalphysik, Universität Innsbruck, 6020 Innsbruck (Austria) [Institut für Experimentalphysik, Universität Innsbruck, 6020 Innsbruck (Austria); Norman Bridge Laboratory of Physics 12-33, California Institute of Technology, Pasadena, California 91125 (United States); Schmidt, P. O. [QUEST Institute for Experimental Quantum Metrology, Physikalisch-Technische Bundesanstalt, 38116 Braunschweig (Germany) [QUEST Institute for Experimental Quantum Metrology, Physikalisch-Technische Bundesanstalt, 38116 Braunschweig (Germany); Institut für Quantenoptik, Leibniz Universität Hannover, 30167 Hannover (Germany); Deutsch, C. [Laboratoire Kastler Brossel, ENS/UPMC-Paris 6/CNRS, 24 rue Lhomond, F-75005 Paris (France) [Laboratoire Kastler Brossel, ENS/UPMC-Paris 6/CNRS, 24 rue Lhomond, F-75005 Paris (France); Menlo Systems GmbH, Am Klopferspitz 19a, 82152 Martinsried (Germany); Reichel, J. [Laboratoire Kastler Brossel, ENS/UPMC-Paris 6/CNRS, 24 rue Lhomond, F-75005 Paris (France)] [Laboratoire Kastler Brossel, ENS/UPMC-Paris 6/CNRS, 24 rue Lhomond, F-75005 Paris (France); Blatt, R. [Institut für Experimentalphysik, Universität Innsbruck, 6020 Innsbruck (Austria) [Institut für Experimentalphysik, Universität Innsbruck, 6020 Innsbruck (Austria); Institut für Quantenoptik und Quanteninformation, Österreichische Akademie der Wissenschaften, Otto-Hittmair-Platz 1, A-6020 Innsbruck (Austria)

2013-12-15T23:59:59.000Z

178

Whispering-gallery mirrors for short-wavelength laser cavities: Shapes and tolerances  

SciTech Connect (OSTI)

The whispering-gallery mirrors desired for use in short-wavelength laser cavities are seen to be highly aspheric and very different from the shapes encountered in conventional optics. Fabrication tolerance are established by examining the effects of various surface imperfections. The mirrors are found to be relatively insensitive to figures errors. The requirements on surface finish are shown to be fairly strict, though less severe than with normal-incidence optics.

Braud, J.P.

1991-01-01T23:59:59.000Z

179

Whispering-gallery mirrors for short-wavelength laser cavities: Shapes and tolerances  

SciTech Connect (OSTI)

The whispering-gallery mirrors desired for use in short-wavelength laser cavities are seen to be highly aspheric and very different from the shapes encountered in conventional optics. Fabrication tolerance are established by examining the effects of various surface imperfections. The mirrors are found to be relatively insensitive to figures errors. The requirements on surface finish are shown to be fairly strict, though less severe than with normal-incidence optics.

Braud, J.P.

1991-12-31T23:59:59.000Z

180

Understanding the performance of x-ray mirrors  

SciTech Connect (OSTI)

The manufacture of x-ray mirrors is a rather specialized branch of the optical fabrication industry. As those who have had to deal with the procurement of these components well know, there are only a handful of optical companies who supply most of the grazing incidence optics in use at the synchrotron light source facilities in this country. There is relatively little information available of practical use to guide the user through any of the above steps. We have been ''forced'' to develop our own foundation for assessing the performance of various vendors and determining the quality of the components produced by them. Our approach has been to concentrate on the area of metrology of grazing incidence optics and to develop instruments and techniques that can be used to improve the quality of components delivered to us. The major problem hindering the production of grazing incidence optics is the lack of specialized metrology instrumentation that can be used by the small manufacturing shop to assess the quality of the component under production. We have been engaged over the past several years in developing the theoretical framework and practical measurement techniques to link the metrology to actual performance, providing much-needed feedback to the manufacture and also educating users and manufacturers in the proper understanding of the language of surface figure and finish metrology.

Takacs, P.Z.

1989-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "appendages mirrors bumpers" 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

Development of metrology instruments for grazing incidence mirrors  

SciTech Connect (OSTI)

The effective utilization of synchrotron radiation (SR) from high-brightness sources requires the use of optical components with very smooth surfaces and extremely precise shapes. Most manufacturers are not capable of measuring the figure and finish quality of the aspheric optics required for use in grazing incidence beam lines. Over the past several years we have developed measurement techniques and metrology instrumentation that have allowed us to measure the surface profile and roughness of large cylinder optics, up to one meter in length. Based on our measurements and feedback, manufacturers have been able to advance the state-of-the-art in mirror fabrication and are now able to produce acceptable components. Our analysis techniques enable designers to write meaningful specifications and predict the performance of real surfaces in their particular beamline configurations. Commercial instruments are now available for measuring surface microroughness with spatial periods smaller than about one millimeter. No commercial instruments are available for measuring the surface figure on cylindrical aspheres over long spatial periods, from one millimeter up to one meter. For that reason we developed a Long Trace Profiler (LTP) that measures surface profile over the long period range in a non-contact manner to extremely high accuracy. Examples of measured surfaces and data analysis techniques will be discussed, and limitations on the quality of optical surfaces related to intrinsic material properties will also be discussed. 15 refs., 14 figs., 2 tabs.

Takacs, P.Z. (Brookhaven National Lab., Upton, NY (USA)); Church, E.L. (Army Research and Development Command, Dover, NJ (USA)); Qian, Shi-nan (China Univ. of Science and Technology, Hefei, AH (China). Hefei National Synchrotron Radiation Lab.); Liu, Wuming (Academia Sinica, Beijing, BJ (China). Inst. of High Energy Physics)

1989-10-01T23:59:59.000Z

182

A tandem mirror hybrid plume plasma propulsion facility  

SciTech Connect (OSTI)

A concept in electrodeless plasma propulsion, which is also capable of delivering a variable Isp, is presented. The concept involves a three-stage system of plasma injection, heating, and subsequent ejection through a magnetic nozzle. The nozzle produces the hybrid plume by the coaxial injection of hypersonic neutral gas. The gas layer, thus formed, protects the material walls from the hot plasma and, through increased collisions, helps detach it from the diverging magnetic field. The physics of this concept is evaluated numerically through full spatial and temporal simulations; these explore the operating characteristics of such a device over a wide region of parameter space. An experimental facility to study the plasma dynamics in the hybrid plume was built. The device consists of a tandem mirror operating in an asymmetric mode. A later upgrade of this system will incorporate a cold plasma injector at one end of the machine. Initial experiments involve the full characterization of the operating envelope, as well as extensive measurements of plasma properties at the exhaust. The results of the numerical simulations are described.

Chang-Diaz, F.R.; Yang, T.F.; Krueger, W.A.; Peng, S.; Urbahn, J.; Yao, X.; Griffin, D.

1988-01-01T23:59:59.000Z

183

Evaluation of CVD silicon carbide for synchrotron radiation mirrors  

SciTech Connect (OSTI)

Chemical vapor deposited silicon carbide (CVD SiC) is a recent addition to the list of materials suitable for use in the harsh environment of synchrotron radiation (SR) beam lines. SR mirrors for use at normal incidence must be ultrahigh vacuum compatible, must withstand intense x-ray irradiation without surface damage, must be capable of being polished to an extremely smooth surface finish, and must maintain surface figure under thermal loading. CVD SiC exceeds the performance of conventional optical materials in all these areas. It is, however, a relatively new optical material. Few manufacturers have experience in producing optical quality material, and few opticians have experience in figuring and polishing the material. The CVD material occurs in a variety of forms, sensitively dependent upon reaction chamber production conditions. We are evaluating samples of CVD SiC obtained commercially from various manufacturers, representing a range of deposition conditions, to determine which types of CVD material are most suitable for superpolishing. At the time of this writing, samples are being polished by several commercial vendors and surface finish characteristics are being evaluated by various analytical methods.

Takacs, P.Z.

1981-07-01T23:59:59.000Z

184

Study of fusion product effects in field-reversed mirrors  

SciTech Connect (OSTI)

The effect of fusion products (fps) on Field-Reversed Mirror (FRM) reactor concepts has been evaluated through the development of two new computer models. The first code (MCFRM) treats fps as test particles in a fixed background plasma, which is represented as a fluid. MCFRM includes a Monte Carlo treatment of Coulomb scattering and thus provides an accurate treatment of fp behavior even at lower energies where pitch-angle scattering becomes important. The second code (FRMOD) is a steady-state, globally averaged, two-fluid (ion and electron), point model of the FRM plasma that incorporates fp heating and ash buildup values which are consistent with the MCFRM calculations. These codes have been used extensively in the development of an advanced-fuel FRM reactor design (SAFFIRE). A Catalyzed-D version of the plant is also discussed along with an investigation of the steady-state energy distribution of fps in the FRM. User guides for the two computer codes are also included.

Driemeyer, D.E.

1980-01-01T23:59:59.000Z

185

Waveguide QED: Two Photons, Many Qubits, and a Mirror  

E-Print Network [OSTI]

We study two-level systems (2LS) coupled at different points to a one-dimensional waveguide in which one end is open and the other is either open (infinite waveguide) or closed by a mirror (semi-infinite). Upon injection of two photons (corresponding to weak coherent driving), the resonance fluorescence and photon correlations are shaped by the effective qubit transition frequencies and decay rates, which are substantially modified by interference effects. In contrast to the well-known result in an infinite waveguide, photons reflected by a single 2LS coupled to a semi-infinite waveguide are initially bunched, a result that can be simply explained by stimulated emission. As the number of 2LS increases (up to 10 are considered here), rapid oscillations build up in the correlations that persist for a very long time. For instance, when the incoming photons are slightly detuned, the transmitted photons in the infinite waveguide are highly antibunched. On the other hand, upon resonant driving, incoherently reflected photons are mostly distributed within the photonic band gap and several sharp side peaks. These features can be explained by considering the poles of the single particle Green function in the Markovian regime combined with the time delay. Our calculation is not restricted to the Markovian regime, and we obtain several fully non-Markovian results. We show that a single 2LS in a semi-infinite waveguide can not be decoupled by placing it at the node of the photonic field, in contrast to recent results in the Markovian regime. Our results illustrate the complexities that ensue when several qubits are strongly coupled to a bus (the waveguide) as might happen in quantum information processing.

Yao-Lung L. Fang; Harold U. Baranger

2015-02-12T23:59:59.000Z

186

Characterization Of High-Stroke High-Aspect Ratio Micro Electro Mechanical Systems Deformable Mirrors For Adaptive Optics  

E-Print Network [OSTI]

Mirrors For Adaptive Optics, PhD Thesis, University ofFabrication Adaptive  optics  applications  in  astronomy  Max, Center for Adaptive Optics, University of California,

Bouchti, Mohamed Amine

2013-01-01T23:59:59.000Z

187

Some ideas on the choice of designs and materials for cooled mirrors  

SciTech Connect (OSTI)

This paper expresses some views on the fabrication of future synchrotron beam-line optics; more particularly the metallurgical issues in high-quality metal mirrors. A simple mirror with uniform cooling channels is first analyzed theoretically, followed by the cullular-pin-post system with complex coolant flow path. Choice of mirror material is next considered. For the most challenging situations (need for intensive cooling), the present practice is to use nickel-plated glidcop or silicon; for less severe challenges, Si carbide may be used and cooling may be direct or indirect; and for the mildest heat loads, fused silica or ulf are popular. For the highest performance mirrors (extreme heat load), the glidcop developments should be continued perhaps to cellular-pin-post systems. For extreme distortion, Si is indicated and invar offers both improved performance and lower price. For less extreme challenges but still with cooling, Ni-plated metals have the cost advantage and SXA and other Al alloys can be added to glidcop and invar. For mirrors with mild cooling requirements, stainless steel would have many advantages. Once the internal cooling designs are established, they will be seen as more cost-effective and reliable than clamp-on schemes. Where no cooling is needed, Si, Si carbide, and the glasses can be used. For the future, the effect of electroless Ni layers on cooling design need study, and a way to finish nickel that is compatible with multilayers should be developed.

Howells, M.R.

1994-12-01T23:59:59.000Z

188

Testing the mirror world hypothesis for the close-in extrasolar planets  

E-Print Network [OSTI]

Because planets are not expected to be able to form close to stars due to the high temperatures, it has been suggested that the observed close orbiting ($\\sim 0.05$ AU) large mass planets ($\\sim M_J$) might be mirror worlds -- planets composed predominately of mirror matter. The accretion of ordinary matter onto the mirror planet (from e.g. the solar wind from the host star) will make the mirror planet opaque to ordinary radiation with an effective radius $R_p$. It was argued in a previous paper, astro-ph/0101055, that this radius was potentially large enough to explain the measured size of the first transiting close-in extrasolar planet, HD209458b. Furthermore, astro-ph/0101055, made the rough prediction: $R_p \\propto \\sqrt{{T_s \\over M_p}}$, where $T_s$ is the surface temperature of the ordinary matter in the mirror planet and $M_p$ is the mass of the planet (the latter dependence being the more robust prediction). We compare this prediction with the recently discovered transiting planets, OGLE-TR-56b and OGLE-TR-113b.

R. Foot

2004-06-10T23:59:59.000Z

189

Enhanced loss of magnetic-mirror-trapped fast electrons by a shear Alfvén wave  

SciTech Connect (OSTI)

Laboratory observations of enhanced loss of magnetic mirror trapped fast electrons irradiated by a shear Alfvén Wave (SAW) are reported. The experiment is performed in the quiescent after-glow plasma in the Large Plasma Device [Gekelman et al., Rev. Sci. Instrum. 62(12), 2875–2883 (1991)]. A trapped energetic electron population (>100?keV) is generated in a magnetic mirror section (mirror ratio???2, length?=?3.5?m) by an X-mode high power microwave pulse, and forms a hot electron ring due to the grad-B and curvature drift. SAWs of arbitrary polarization are launched externally by a Rotating Magnetic Field source (?B/B{sub 0}???0.1%, ?{sub ?}???9?m). Irradiated by a right-handed circularly polarized SAW, the loss of electrons, in both the radial and the axial direction of the mirror field, is significantly enhanced and is modulated at f{sub Alfvén}. The periodical loss continues even after the termination of the SAW. Experimental observations suggest that a spatial distortion of the ring is formed in the SAW field and creates a collective mode of the hot electron population that degrades its confinement and leads to electron loss from the magnetic mirror. The results could have implications on techniques of radiation belt remediation.

Wang, Y.; Gekelman, W.; Pribyl, P. [Department of Physics and Astronomy, University of California, Los Angeles, California 90095 (United States)] [Department of Physics and Astronomy, University of California, Los Angeles, California 90095 (United States); Papadopoulos, K. [Department of Physics and Astronomy, University of Maryland, College Park, Maryland 20742 (United States)] [Department of Physics and Astronomy, University of Maryland, College Park, Maryland 20742 (United States)

2014-05-15T23:59:59.000Z

190

Some applications of mirror-generated electric potentials to alternative fusion concepts  

SciTech Connect (OSTI)

Transient electrical potentials can be generated in plasmas by utilizing impulsive mirror-generated forces acting on the plasma electrons together with ion inertia to cause momentary charge imbalance. In the Mirrortron such potentials are generated by applying a rapidly rising (tens of nanoseconds) localized mirror field to the central region of a hot-electron plasma confined between static mirrors. Because of the loss-cone nature of the electron distribution the sudden appearance of the pulsed mirror tends to expel electrons, whereas the ion density remains nearly constant. The quasi-neutrality condition then operates to create an electrical potential the equipotential surfaces of which can be shown theoretically to be congruent with surfaces of constant B. An alternative way of generating transient potentials is to apply a pulse of high-power microwaves to a plasma residing on a magnetic field with a longitudinal gradient. This technique resembles one employed in the Pleiade experiments. At gigawatt power levels, such as those produced by a Free Electron Laser, the production of very high transient potentials is predicted. Fusion-relevant applications of these ideas include heavy-ion drivers for inertial fusion, and the possibility of employing these techniques to enhance the longitudinal confinement of fusion plasmas in multiple-mirror systems. 23 refs., 3 figs.

Post, R.F.

1990-09-24T23:59:59.000Z

191

Fusion neutron generation computations in a stellarator-mirror hybrid with neutral beam injection  

SciTech Connect (OSTI)

In the paper [Moiseenko V.E., Noack K., Agren O. 'Stellarator-mirror based fusion driven fission reactor' J Fusion Energy 29 (2010) 65.], a version of a fusion driven system (FDS), i.e. a sub-critical fast fission assembly with a fusion plasma neutron source, is proposed. The plasma part of the reactor is based on a stellarator with a small mirror part. Hot ions with high perpendicular energy are assumed to be trapped in the magnetic mirror part. The stellarator part which connects to the mirror part and provides confinement for the bulk (deuterium) plasma. In the magnetic well of the mirror part, fusion reactions occur from collisions between a of hot ion component (tritium) with cold background plasma ions. RF heating is one option to heat the tritium. A more conventional method to sustain the hot ions is neutral beam injection (NBI), which is here studied numerically for the above-mentioned hybrid scheme. For these studies, a new kinetic code, KNBIM, has been developed. The code takes into account Coulomb collisions between the hot ions and the background plasma. The geometry of the confining magnetic field is arbitrary for the code. It is accounted for via a numerical bounce averaging procedure. Along with the kinetic calculations the neutron generation intensity and its spatial distribution are computed.

Moiseenko, V. E.; Agren, O. [Institute of Plasma Physics, National Science Center 'Kharkiv Institute of Physics and Technology', Akademichna St. 1, 61108 Kharkiv (Ukraine); Uppsala University, Angstroem Laboratory, Division of Electricity, Box 534, SE-7512 Uppsala (Sweden)

2012-06-19T23:59:59.000Z

192

Scalable stacked array piezoelectric deformable mirror for astronomy and laser processing applications  

SciTech Connect (OSTI)

A prototype of a scalable and potentially low-cost stacked array piezoelectric deformable mirror (SA-PDM) with 35 active elements is presented in this paper. This prototype is characterized by a 2 ?m maximum actuator stroke, a 1.4 ?m mirror sag (measured for a 14 mm × 14 mm area of the unpowered SA-PDM), and a ±200 nm hysteresis error. The initial proof of concept experiments described here show that this mirror can be successfully used for shaping a high power laser beam in order to improve laser machining performance. Various beam shapes have been obtained with the SA-PDM and examples of laser machining with the shaped beams are presented.

Wlodarczyk, Krystian L., E-mail: K.L.Wlodarczyk@hw.ac.uk; Maier, Robert R. J.; Hand, Duncan P. [Institute of Photonics and Quantum Sciences, Heriot-Watt University, Edinburgh EH14 4AS (United Kingdom)] [Institute of Photonics and Quantum Sciences, Heriot-Watt University, Edinburgh EH14 4AS (United Kingdom); Bryce, Emma; Hutson, David; Kirk, Katherine [School of Engineering and Science, University of the West of Scotland, Paisley PA1 2BE (United Kingdom)] [School of Engineering and Science, University of the West of Scotland, Paisley PA1 2BE (United Kingdom); Schwartz, Noah; Atkinson, David; Beard, Steven; Baillie, Tom; Parr-Burman, Phil [UK Astronomy Technology Centre, Royal Observatory, Edinburgh EH9 3HJ (United Kingdom)] [UK Astronomy Technology Centre, Royal Observatory, Edinburgh EH9 3HJ (United Kingdom); Strachan, Mel [Institute of Photonics and Quantum Sciences, Heriot-Watt University, Edinburgh EH14 4AS (United Kingdom) [Institute of Photonics and Quantum Sciences, Heriot-Watt University, Edinburgh EH14 4AS (United Kingdom); UK Astronomy Technology Centre, Royal Observatory, Edinburgh EH9 3HJ (United Kingdom)

2014-02-15T23:59:59.000Z

193

Metrology for x-ray telescope mirrors in a vertical configuration  

SciTech Connect (OSTI)

Mirrors used in x-ray telescope systems for observations outside of the earth`s atmosphere are usually made of several thin nested shells, each formed by a pair of paraboloidal and hyperboloidal surfaces. The thin shells are very susceptible to self-weight deflection caused by gravity and are nearly impossible to test by conventional interferometric techniques. The metrology requirements for these mirrors are extremely challenging. This paper presents a prototype of a Vertical Scanning Long Trace Profiler (VSLTP) which is optimized to measure the surface figure of x-ray telescope mirrors in a vertical orientation. The optical system of the VSLTP is described. Experimental results from measurements on an x-ray telescope mandrel and tests of the accuracy and repeatability of the prototype VSLTP are presented. The prototype instrument has achieved a height measurement accuracy of about 50 nanometers with a repeatability of better than 20 nanometers, and a slope measurement accuracy of about 1 microradian.

Li, Haizhang; Li, Xiaodan; Grindel, M.W.

1995-09-01T23:59:59.000Z

194

Method of bonding silver to glass and mirrors produced according to this method  

DOE Patents [OSTI]

A method for adhering silver to a glass substrate for producing mirrors includes attaining a silicon enriched substrate surface by reducing the oxygen therein in a vacuum and then vacuum depositing a silver layer onto the silicon enriched surface. The silicon enrichment can be attained by electron beam bombardment, ion beam bombardment, or neutral beam bombardment. It can also be attained by depositing a metal, such as aluminum, on the substrate surface, allowing the metal to oxidize by pulling oxygen from the substrate surface, thereby leaving a silicon enriched surface, and then etching or eroding the metal oxide layer away to expose the silicon enriched surface. Ultraviolet rays can be used to maintain dangling silicon bonds on the enriched surface until covalent bonding with the silver can occur. This disclosure also includes encapsulated mirrors with diffusion layers built therein. One of these mirrors is assembled on a polymer substrate.

Pitts, John R. (Golden, CO); Thomas, Terence M. (Arvada, CO); Czanderna, Alvin W. (Lakewood, CO)

1985-01-01T23:59:59.000Z

195

Method of bonding silver to glass and mirrors produced according to this method  

DOE Patents [OSTI]

A method for adhering silver to a glass substrate for producing mirrors includes attaining a silicon enriched substrate surface by reducing the oxygen therein in a vacuum and then vacuum depositing a silver layer onto the silicon enriched surface. The silicon enrichment can be attained by electron beam bombardment, ion beam bombardment, or neutral beam bombardment. It can also be attained by depositing a metal, such as aluminum, on the substrate surface, allowing the metal to oxidize by pulling oxygen from the substrate surface, thereby leaving a silicon enriched surface, and then etching or eroding the metal oxide layer away to expose the silicon enriched surface. Ultraviolet rays can be used to maintain dangling silicon bonds on the enriched surface until covalent bonding with the silver can occur. This disclosure also includes encapsulated mirrors with diffusion layers built therein. One of these mirrors is assembled on a polymer substrate.

Pitts, J.R.; Thomas, T.M.; Czanderna, A.W.

1984-07-31T23:59:59.000Z

196

Multi-range free-electron laser with a pair of dielectric multilayer mirrors  

SciTech Connect (OSTI)

We report the experimental achievement of a free-electron laser in three wavelength regions, mid-infrared, near-infrared, and visible, using a pair of dielectric multilayer mirrors in the storage ring NIJI-IV. Dielectric multilayer mirrors can have high reflectivity at wavelength regions corresponding to higher-diffraction orders of the target wavelength. A narrowing of the relative bandwidth of the dielectric multilayer mirrors was observed in the higher-diffraction orders of the target wavelength and was found to be caused by high diffraction and carbon contamination. Our experimental results will be applied to development of a multi-rang laser that have a gain in a wade wavelength region.

Sei, Norihiro; Ogawa, Hiroshi; Yamada, Kawakatsu [Research Institute of Instrumentation Frontier, National Institute of Advanced Industrial Science and Technology, 1-1-1 Umezono, Tsukuba, Ibaraki 305-8568 (Japan)

2012-10-01T23:59:59.000Z

197

Safety and power multiplication aspects of mirror fusion-fission hybrids  

SciTech Connect (OSTI)

Recently, in a research project at Uppsala University a simplified neutronic model for a straight field line mirror hybrid has been devised and its most important operation parameters have been calculated under the constraints of a fission power production of 3 GW and that the effective multiplication factor k{sub eff} does not exceed 0.95. The model can be considered as representative for hybrids driven by other types of mirrors too. In order to reduce the demand on the fusion power of the mirror, a modified option of the hybrid has been considered that generates a reduced fission power of 1.5 GW with an increased maximal value k{sub eff}=0.97. The present paper deals with nuclear safety aspects of this type of hybrids. It presents and discusses calculation results of reactivity effects as well as of driver effects.

Noack, Klaus; Agren, Olov; Kaellne, Jan; Hagnestal, Anders; Moiseenko, Vladimir E. [Uppsala University, Angstroem Laboratory, Division of Electricity, Box 534, SE-751 21 Uppsala (Sweden); Institute of Plasma Physics, National Science Center 'Kharkiv Institute of Physics and Technology', Akademichna St. 1, 61108 Kharkiv (Ukraine)

2012-06-19T23:59:59.000Z

198

First principle analyses of direct bandgap solar cells with absorbing substrates versus mirrors  

SciTech Connect (OSTI)

Direct bandgap InP, GaAs, CdTe, and Ga{sub 0.5}In{sub 0.5}P solar cells containing backside mirrors as well as parasitically absorbing substrates are analyzed for their limiting open circuit voltage and power conversion efficiency with comparison to record solar cells. From the principle of detailed balance, it is shown quantitatively that mirror solar cells have greater voltage and power conversion efficiency than their substrate counterparts. Next, the radiative recombination coefficient and maximum radiative lifetime of GaAs mirror and substrate solar cells are calculated and compared to the nonradiative Auger and Shockley-Read-Hall (SRH) lifetimes. Mirror solar cells have greater radiative lifetime than their substrate variants. Auger lifetime exceeds radiative lifetime for both substrate and mirror cells while SRH lifetime may be less or greater than radiative lifetime depending on trap concentration and capture cross section. Finally, the change in free energy of the photogenerated carriers is analyzed in a comparison between InP, GaAs, CdTe, and Ga{sub 0.5}In{sub 0.5}P mirror and substrate solar cells in order to characterize the relationship between solar photon quality and free energy management in solar cells with differing bandgaps. Wider bandgap visible threshold Ga{sub 0.5}In{sub 0.5}P solar cells make better use of the available change in free energy of the photogenerated charge carriers, even when normalized to the bandgap energy, than narrower bandgap near-IR threshold InP, GaAs, and CdTe solar cells.

Kirk, Alexander P. [School of Electrical, Computer and Energy Engineering, Arizona State University, Tempe, Arizona 85287 (United States); Kirk, Wiley P. [Department of Materials Science and Engineering, University of Texas at Arlington, Arlington, Texas 76019 (United States)

2013-11-07T23:59:59.000Z

199

Collective F\\"orster energy transfer modified by the planar metallic mirror  

E-Print Network [OSTI]

We present a theory of the F\\"orster energy transfer between the arrays of donor and acceptor molecules lying on the planar metallic mirror. We reveal strong modification of the effective transfer rate by the mirror in the incoherent pumping regime. The rate can be either suppressed or enhanced depending on the relative positions between acceptor and donor arrays. The strong modification of the transfer rate is a collective effect, mediated by the light-induced coupling between the donors; it is absent in the single donor model.

Poddubny, Alexander N

2015-01-01T23:59:59.000Z

200

Quantum feedback cooling of a single trapped ion in front of a mirror  

E-Print Network [OSTI]

We develop a theory of quantum feedback cooling of a single ion trapped in front of a mirror. By monitoring the motional sidebands of the light emitted into the mirror mode we infer the position of the ion, and act back with an appropriate force to cool the ion. We derive a feedback master equation along the lines of the quantum feedback theory developed by Wiseman and Milburn, which provides us with cooling times and final temperatures as a function of feedback gain and various system parameters.

V. Steixner; P. Rabl; P. Zoller

2005-06-22T23:59:59.000Z

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201

Demonstration of achromatic cold-neutron microscope utilizing axisymmetric focusing mirrors  

SciTech Connect (OSTI)

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

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

2013-05-06T23:59:59.000Z

202

The Status of Research Regarding Magnetic Mirrors as a Fusion Neutron Source or Power Plant  

SciTech Connect (OSTI)

Experimental results, theory and innovative ideas now point with increased confidence to the possibility of a Gas Dynamic Trap (GDT) neutron source which would be on the path to an attractively simple Axisymmetric Tandem Mirror (ATM) power plant. Although magnetic mirror research was terminated in the US 20 years ago, experiments continued in Japan (Gamma 10) and Russia (GDT), with a very small US effort. This research has now yielded data, increased understanding, and generated ideas resulting in the new concepts described here. Early mirror research was carried out with circular axisymmetric magnets. These plasmas were MHD unstable due to the unfavorable magnetic curvature near the mid-plane. Then the minimum-B concept emerged in which the field line curvature was everywhere favorable and the plasma was situated in a MHD stable magnetic well (70% average beta in 2XII-B). The Ioffe-bar or baseball-coil became the standard for over 40 years. In the 1980's, driven by success with minimum-B stabilization and the control of ion cyclotron instabilities in PR6 and 2XII-B, mirrors were viewed as a potentially attractive concept with near-term advantages as a lower Q neutron source for applications such as a hybrid fission fuel factory or toxic waste burner. However there are down sides to the minimum-B geometry: coil construction is complex; restraining magnetic forces limit field strength and mirror ratios. Furthermore, the magnetic field lines have geodesic curvature which introduces resonant and neoclassical radial transport as observed in early tandem mirror experiments. So what now leads us to think that simple axisymmetric mirror plasmas can be stable? The Russian GDT experiment achieves on-axis 60% beta by peaking of the kinetic plasma pressure near the mirror throat (where the curvature is favorable) to counter-balance the average unfavorable mid-plane curvature. Then a modest augmentation of plasma pressure in the expander results in stability. The GDT experiments have confirmed the physics of effluent plasma stabilization predicted by theory. The plasma had a mean ion energy of 10 keV and a density of 5e19m-3. If successful, the axisymmetric tandem mirror extension of the GDT idea could lead to a Q {approx} 10 power plant of modest size and would yield important applications at lower Q. In addition to the GDT method, there are four other ways to augment stability that have been demonstrated; including: plasma rotation (MCX), diverter coils (Tara), pondermotive (Phaedrus & Tara), and end wall funnel shape (Nizhni Novgorod). There are also 5 stabilization techniques predicted, but not yet demonstrated: expander kinetic pressure (KSTM-Post), Pulsed ECH Dynamic Stabilization (Post), wall stabilization (Berk), non-paraxial end mirrors (Ryutov), and cusp ends (Kesner). While these options should be examined further together with conceptual engineering designs. Physics issues that need further analysis include: electron confinement, MHD and trapped particle modes, analysis of micro stability, radial transport, evaluation and optimization of Q, and the plasma density needed to bridge to the expansion-region. While promising all should be examined through increased theory effort, university-scale experiments, and through increased international collaboration with the substantial facilities in Russia and Japan The conventional wisdom of magnetic mirrors was that they would never work as a fusion concept for a number of reasons. This conventional wisdom is most probably all wrong or not applicable, especially for applications such as low Q (DT Neutron Source) aimed at materials testing or for a Q {approx} 3-5 fusion neutron source applied to destroying actinides in fission waste and breeding of fissile fuel.

Simonen, T

2008-12-23T23:59:59.000Z

203

Optical and Durability Evaluation for Silvered Polymeric Mirrors and Reflectors: Cooperative Research and Development Final Report, CRADA Number, CRD-08-316  

SciTech Connect (OSTI)

3M is currently developing silvered polymeric mirror reflectors as low-cost replacements for glass mirrors in concentrating solar power (CSP) systems. This effort is focused on development of reflectors comprising both metallized polymeric mirror films based on improved versions of ECP-305+ or other durable mirror film concepts and appropriate mechanically robust substrates. The objectives for this project are to reduce the system capital and operating costs and to lower the levelized cost of energy for CSP installations. The development of mirror reflectors involves work on both full reflectors and mirror films with and without coatings. Mirror reflectors must meet rigid optical specifications in terms of radius of curvature, slope errors and specularity. Mirror films must demonstrate long-term durability and maintain high reflectivity. 3M would like to augment internal capabilities to validate product performance with methods and tools developed at NREL to address these areas.

Gray, M.

2014-08-01T23:59:59.000Z

204

Simultaneous compression and characterization of ultrashort laser pulses using chirped mirrors and glass wedges  

E-Print Network [OSTI]

We present a simple and robust technique to retrieve the phase of ultrashort laser pulses, based on a chirped mirror and glass wedges compressor. It uses the compression system itself as a diagnostic tool, thereby making unnecessary the use of complementary diagnostic tools. We used this technique to compress and characterize 7.1 fs laser pulses from an ultrafast laser oscillator.

Miranda, Miguel; Arnold, Cord; L'Huillier, Anne; Crespo, Helder

2011-01-01T23:59:59.000Z

205

September 15, 1997 / Vol. 22, No. 18 / OPTICS LETTERS 1433 Optical bistability induced by mirror  

E-Print Network [OSTI]

September 15, 1997 / Vol. 22, No. 18 / OPTICS LETTERS 1433 Optical bistability induced by mirror, Cambridge, Massachusetts 02139 Received May 2, 1997 We have observed optical bistability caused in 106 (ppm) have been successfully measured. © 1997 Optical Society of America Optical bistability

Fang-Yen, Christopher

206

WAVE-DRIVEN ROTATION IN CENTRIFUGAL MIRRORS Abraham J. Fetterman and Nathaniel J. Fisch  

E-Print Network [OSTI]

by harnessing alpha particle energy. This is an exten- sion of the alpha channeling effect. The alpha particleWAVE-DRIVEN ROTATION IN CENTRIFUGAL MIRRORS Abraham J. Fetterman and Nathaniel J. Fisch Department frequency waves. A fixed azimuthal ripple is a simple and efficient wave that could produce rotation

207

2000 Special Issue Synthetic brain imaging: grasping, mirror neurons and imitation  

E-Print Network [OSTI]

2000 Special Issue Synthetic brain imaging: grasping, mirror neurons and imitation M.A. Arbiba,b,*, A. Billardb , M. Iacobonic , E. Oztopa,b a USC Brain Project, University of Southern California, Los, CA 90089-2520, USA c Division of Brain Mapping, Neuropsychiatric Institute, UCLA School of Medicine

Oztop, Erhan

208

Reinforcement Learning in MirrorBot Cornelius Weber, David Muse, Mark Elshaw, and Stefan Wermter  

E-Print Network [OSTI]

Reinforcement Learning in MirrorBot Cornelius Weber, David Muse, Mark Elshaw, and Stefan Wermter Hybrid Intelligent Systems, SCAT, University of Sunderland, UK {cornelius.weber, david.muse, mark C. Weber et al. 2 A Visually Guided Robotic Docking Task Grasping of an object is a fundamental task

Weber, Cornelius

209

Reinforcement Learning in MirrorBot Cornelius Weber, David Muse, Mark Elshaw, and Stefan Wermter  

E-Print Network [OSTI]

Reinforcement Learning in MirrorBot Cornelius Weber, David Muse, Mark Elshaw, and Stefan Wermter Hybrid Intelligent Systems, SCAT, University of Sunderland, UK {cornelius.weber, david.muse, mark. Weber et al. 2 A Visually Guided Robotic Docking Task Grasping of an object is a fundamental task

Weber, Cornelius

210

Active Optics Performance Study of the Primary Mirror of the Gemini Telescopes Project  

E-Print Network [OSTI]

Active Optics Performance Study of the Primary Mirror of the Gemini Telescopes Project Myung K. Cho Optical Sciences Center in the University of Arizona Tucson, AZ 85721 and Gemini Telescopes Project P. O. Box 26732 Tucson, AZ 85726­6732 Gemini Preprint #9 #12; Active optics performance study of the primary

211

4096-element continuous face-sheet MEMS deformable mirror for high-contrast imaging  

E-Print Network [OSTI]

structural support on electrical interconnections. Eight high-density flex cables connect the DM to the drive systems MEMS deformable mirror, fabricated using polysilicon surface micromachining manufacturing that is electrically isolated from the electrodes and maintained at a ground potential. The actuators are arranged

212

Status of the Tandem Mirror Experiment-Upgrade (TMX-U) diagnostic system  

SciTech Connect (OSTI)

This paper presents the current status of the Tandem Mirror Experiment-Upgrade (TMX-U) diagnostics system. For the initial instruments active on TMX-U, the expansions or upgrades that have been implemented are outlined. For the newly added systems, more implementation details are presented.

Coutts, G.W.; Coffield, F.E.; Hornady, R.S.

1983-11-26T23:59:59.000Z

213

Waves and Mirror Symmetry in Rotating and Stratified Turbulence Pablo D. Mininni  

E-Print Network [OSTI]

Waves and Mirror Symmetry in Rotating and Stratified Turbulence Pablo D. Mininni Departamento de in a flow. In ideal rotating flows, helicity is conserved, and waves in rotating and stratified flows are associated with helical flows, to the point that helical-wave decompositions are often used to study

214

Supernova explosions, 511 keV photons, gamma ray bursts and mirror matter  

E-Print Network [OSTI]

There are three astroparticle physics puzzles which fire the imagination: the origin of the ``Great Positron Producer'' in the galactic bulge, the nature of the gamma-ray bursts central engine and the mechanism of supernova explosions. We show that the mirror matter model has the potential to solve all three of these puzzles in one beautifully simple strike.

R. Foot; Z. K. Silagadze

2004-04-27T23:59:59.000Z

215

A Mirror of Our World: Google Earth and the History of Cartography  

E-Print Network [OSTI]

Google Earth is widely admired as one of the most advanced and powerful products of modern computerized cartography. It has been praised as a revolutionary new way of viewing the earth, as the first convincing attempt at a mirror-world or a...

Allen, David Y.

2009-08-20T23:59:59.000Z

216

Mirror mode waves: Messengers from the coronal heating region C. T. Russell,1  

E-Print Network [OSTI]

, but except for some evidence of perpendicular heating of heavy ions obtained by remote sensing, it has provenMirror mode waves: Messengers from the coronal heating region C. T. Russell,1 L. K. Jian,1 J. G problem in heliospheric physics is the mechanism for the heating and acceleration of the solar wind. One

California at Berkeley, University of

217

Residential Location Choice--a Search in the Mirror of the Past  

E-Print Network [OSTI]

Residential Location Choice--a Search in the Mirror of the Past Cynthia Chen University environment · Residential self-selection, but · What do we know about residential self- selection? ­ When · Behavioral studies · Life course research · Human memory· Human memory · The current state of residential

Bertini, Robert L.

218

Integrated Modeling and Design of Lightweight, Active Mirrors for Launch Survival and On-Orbit  

E-Print Network [OSTI]

Integrated Modeling and Design of Lightweight, Active Mirrors for Launch Survival and On-Orbit Performance Lucy E. Cohan and David W. Miller June 2010 SSL# 2-10 #12;#12;Integrated Modeling and Design-based design and evolutionary models to guide the technology development program. This methodology is applied

219

Magnetic mirror fusion-fission early history and applicability to other systems  

SciTech Connect (OSTI)

In the mid 1970s to mid 1980s the mirror program was stuck with a concept, the Standard Mirror that was Q {approx} 1 where Q=P{sub fusion}/P{sub injection}. Heroic efforts were put into hybridizing thinking added energy and fuel sales would make a commercial product. At the same time the tokamak was thought to allow ignition and ultrahigh Q values of 20 or even higher. There was an effort to use neutral beams to drive the tokamak just like the mirror machines were driven in which case the Q value plunged to a few, however this was thought to be achievable decades earlier than the high Q versions. Meanwhile current drive and other features of the tokamak have seen the projected Q values come down to the range of 10. Meanwhile the mirror program got Q enhancement into high gear and various tandem mirrors projected Q values up towards 10 and with advanced features over 10 with axi-symmetric magnets (See R. F. Post papers), however the experimental program is all but non-existent. Meanwhile, the gas dynamic trap mirror system which is present day state-of-the-art can with low risk produce Q of {approx}0.1 useful for a low risk, low cost neutron source for materials development useful for the development of materials for all fusion concepts (see Simonen white paper: 'A Physics-Based Strategy to Develop a Mirror Fusion-Fission Hybrid' and D.D. Ryutov, 'Axisymmetric MHD-stable mirror as a neutron source and a driver for a fusion-fission hybrid'). Many early hybrid designs with multi-disciplinary teams were carried out in great detail for the mirror system with its axi-symmetric blanket modules. It is recognized that most of these designs are adaptable to tokamak or inertial fusion geometry. When Q is low (1 to 2) economics gives a large economic penalty for high recirculating power. These early studies covered the three design types: Power production, fuel production and waste burning. All three had their place but power production fell away because every study showed fusion machines that were extensively studied by multidisciplinary teams came up with power costs much higher than for existing fission plants except in very large sizes (3 GWe). There was lots of work on waste burning - Ted Parrish - comes to mind. However, fuel production along with power production became nearly everyone's goals. First, fast-fission blankets were favored but later to enhance safety, fission-suppressed blankets came into vogue. Both fuel producing and waste burning hybrid studies were terminated with the advent of accidents, high interest rates, rising 'green like' movement and cheap natural gas for power production. For waste burning and fast-fission fuel producing designs, the blanket energy multiplication was about 10 and economics was OK relative to recirculating power for Q over 2. For fission-suppressed fuel producers, where the blanket multiplication is under 2, the Q needed was over 5. In the mirror program we came at this problem by trying to find a product for mirror fusion technology. We hoped we had a product and studied and promoted it. There was no market pull and when the mirror program collapsed in the US, so did both hybrid programs for mirrors and tokamaks and IFE by the mid 1980s. Today, the problem of what to do with wastes that were supposed to be accepted by the government appears to be a high value market pull. It remains to be shown if fusion neutrons can be generated at low enough cost so that economics will not be a showstopper. For burning only the minor actinides, the economics will be the most favorable. Burning the Pu as well will lower the number of fission reactors supported by each burner fusion machine and hurt economics of the system. The fuel-producing role of fusion to fuel fission reactors remains an important possible use of fusion especially in the early stages of fusion development. It is not clear that burning fission wastes in a fusion machine is more appropriate than burning these wastes in specially designed fission machines. Fusion can produce U-233 along with over 2.4%U-232 making the material large

Moir, R

2009-08-24T23:59:59.000Z

220

Strong light-matter coupling in ultrathin double dielectric mirror GaN microcavities  

SciTech Connect (OSTI)

Strong light-matter coupling is demonstrated at low temperature in an ultrathin GaN microcavity fabricated using two silica/zirconia Bragg mirrors, in addition to a three-period epitaxial (Al,Ga)N mirror serving as an etch stop and assuring good quality of the overgrown GaN. The {lambda}/2 cavity is grown by molecular beam epitaxy on a Si substrate. Analysis of angle-resolved data reveal key features of the strong coupling regime in both reflectivity and transmission spectra at 5 K: anticrossing with a normal mode splitting of 43{+-}2 meV and 56{+-}2 meV for reflectivity and transmission, respectively, and narrowing of the lower polariton linewidth near resonance.

Bejtka, K.; Martin, R. W. [Department of Physics, SUPA, University of Strathclyde, Glasgow G4 0NG (United Kingdom); CRHEA-CNRS, Rue Bernard Gregory, Parc Sophia Antipolis, 06560 Valbonne (France); Reveret, F.; Vasson, A.; Leymarie, J. [LASMEA, UMR 6602 UBP/CNRS, 24 Avenue des Landais, F-63177 Aubiere Cedex (France); Edwards, P. R. [Department of Physics, SUPA, University of Strathclyde, Glasgow G4 0NG (United Kingdom); Sellers, I. R.; Duboz, J. Y.; Leroux, M.; Semond, F. [CRHEA-CNRS, Rue Bernard Gregory, Parc Sophia Antipolis, 06560 Valbonne (France)

2008-06-16T23:59:59.000Z

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


221

A mirror for lab-based quasi-monochromatic parallel x-rays  

SciTech Connect (OSTI)

A multilayered parabolic mirror with six W/Al bilayers was designed and fabricated to generate monochromatic parallel x-rays using a lab-based x-ray source. Using this mirror, curved bright bands were obtained in x-ray images as reflected x-rays. The parallelism of the reflected x-rays was investigated using the shape of the bands. The intensity and monochromatic characteristics of the reflected x-rays were evaluated through measurements of the x-ray spectra in the band. High intensity, nearly monochromatic, and parallel x-rays, which can be used for high resolution x-ray microscopes and local radiation therapy systems, were obtained.

Nguyen, Thanhhai; Lu, Xun; Lee, Chang Jun; Jeon, Insu, E-mail: i-jeon@chonnam.ac.kr [School of Mechanical Engineering, Chonnam National University, 300 Yongbong-dong, Buk-gu, Gwangju 500-757 (Korea, Republic of); Jung, Jin-Ho [Pro-optics Co., Ltd., 475 Ami-ri, Bubal-eup, Icheon 467-866 (Korea, Republic of); Jin, Gye-Hwan [Department of Radiology, Nambu University, 76 Chumdan Jungang 1-ro, Gwangsan-gu, Gwangju 506-706 (Korea, Republic of); Kim, Sung Youb [School of Mechanical and Advanced Materials Engineering, Ulsan National Institute of Science and Technology, 100 Banyeon-ri, Eonyang-eup, Ulju-gun, Ulsan 689-798 (Korea, Republic of)

2014-09-15T23:59:59.000Z

222

Vectorial velocity filter for ultracold neutrons based on a surface-disordered mirror system  

E-Print Network [OSTI]

We perform classical three-dimensional Monte Carlo simulations of ultracold neutrons scattering through an absorbing-reflecting mirror system in the Earth's gravitational field. We show that the underlying mixed phase space of regular skipping motion and random motion due to disorder scattering can be exploited to realize a vectorial velocity filter for ultracold neutrons. The absorbing-reflecting mirror system proposed allows beams of ultracold neutrons with low angular divergence to be formed. The range of velocity components can be controlled by adjusting the geometric parameters of the system. First experimental tests of its performance are presented. One potential future application is the investigation of transport and scattering dynamics in confined systems downstream of the filter.

L. A. Chizhova; S. Rotter; T. Jenke; G. Cronenberg; P. Geltenbort; G. Wautischer; H. Filter H. Abele; J. Burgdörfer

2014-03-19T23:59:59.000Z

223

A review of "Mirrors of Revolution: Conflict and Political Identity in Early Modern Europe" by Francesco Benigno  

E-Print Network [OSTI]

, various groups saw individual opportunities within supporting the King. e work is solid and straightforward and works to expand our understanding of the other side of the British Civil Wars. Francesco Benigno. Mirrors of Revolution: Con#29;ict...

Worcester, Thomas

2011-01-01T23:59:59.000Z

224

A Mirror Neuron Inspired Hierarchical Network for Action Selection Mark Elshaw, Cornelius Weber, Alex Zochios, Stefan Wermter  

E-Print Network [OSTI]

A Mirror Neuron Inspired Hierarchical Network for Action Selection Mark Elshaw, Cornelius Weber of Sunderland, UK [Mark.Elshaw,Cornelius.Weber,Stefan.Wermter]@sunderland.ac.uk Abstract In this paper we

Weber, Cornelius

225

Design and development of a 329-segment tip-tilt piston mirror array for space-based adaptive optics  

E-Print Network [OSTI]

Design and development of a 329-segment tip-tilt piston mirror array for space-based adaptive. It consists of 329-hexagonal segments on a 600 m pitch, each with tip/tilt and piston degrees of freedom

226

Morphology, microstructure, stress and damage properties of thin film coatings for the LCLS x-ray mirrors  

SciTech Connect (OSTI)

The development and properties of reflective coatings for the x-ray offset mirror systems of the Linac Coherent Light Source (LCLS) free-electron laser (FEL) are discussed in this manuscript. The uniquely high instantaneous dose of the LCLS FEL beam translates to strict limits in terms of materials choice, thus leading to an x-ray mirror design consisting of a reflective coating deposited on a silicon substrate. Coherent wavefront preservation requirements for these mirrors result in stringent surface figure and finish specifications. DC-magnetron sputtered B{sub 4}C and SiC thin film coatings with optimized stress, roughness and figure properties for the LCLS x-ray mirrors are presented. The evolution of microstructure, morphology, and stress of these thin films versus deposition conditions is discussed. Experimental results on the performance of these coatings with respect to FEL damage are also presented.

Soufli, R; Baker, S L; Robinson, J C; Gullikson, E M; McCarville, T J; Pivovaroff, M J; Stefan, P; Hau-Riege, S P; Bionta, R

2009-04-23T23:59:59.000Z

227

Multilayer deposition and EUV reflectance characterization of 131 ? flight mirrors for AIA at LLNL  

SciTech Connect (OSTI)

Mo/Si multilayer coatings reflecting at 131 {angstrom} were deposited successfully on the AIA primary and secondary flight mirrors and on two coating witness Si wafers, on November 16, 2005, at LLNL. All coatings were characterized by means of EUV reflectance measurements at beamline 6.3.2 of the Advanced Light Source (ALS) synchrotron at LBNL, and were found to be well within specifications.

Soufli, R; Robinson, J C; Spiller, E; Baker, S L; Dollar, F J; Gullikson, E M

2006-02-22T23:59:59.000Z

228

A microwave tomography system using a tunable mirror for beam steering  

SciTech Connect (OSTI)

Microwave tomography is a fast-growing technique in the fields of NDE and medical industry. This paper presents a new microwave tomography system which reduces the complexities of conventional microwave imaging systems by utilizing a reconfigurable mirror, a tunable reflectarray antenna. In order to build a tunable reflectarray with beam steering capabilities, the unit cell characteristics should dynamically alter. Modelling and experimental results of a single unit cell are presented in this work.

Tayebi, A. [Department of Electrical and Computer Engineering, College of Engineering, Michigan State University, East Lansing, MI 48824 (United States); Non-Destructive Evaluation Laboratory, Michigan State University, East Lansing, MI 48824 (United States); Department of Physic (United States); Tang, J. [Department of Electrical and Computer Engineering, College of Engineering, Michigan State University, East Lansing, MI 48824 (United States); Paladhi, P. Roy; Udpa, L.; Udpa, S. [Department of Electrical and Computer Engineering, College of Engineering, Michigan State University, East Lansing, MI 48824 (United States); Non-Destructive Evaluation Laboratory, Michigan State University, East Lansing, MI 48824 (United States)

2014-02-18T23:59:59.000Z

229

Relative radiant heat absorption characteristics of two types of mirror shields and a polished aluminum shield  

E-Print Network [OSTI]

compared. The relative absorptivities of two types of rear?silvered safety plate mirrors and a polished aluminum sheet will be compared in this research. LITERATURE REVIEW Modes of Heat Transmission It is well understood that heat may flow only... of vasomotor tone, peripheral venous blood pooling, hypotension, and cerebral anoxia. This instability results in nausea, giddi- 19 ness, universal discomfort, acute physical fatigue, and sometimes fainting. Salt deficiency from any of several possible...

Herron, Steven Douglas

1973-01-01T23:59:59.000Z

230

Support mechanism for a mirrored surface or other arrangement and method  

DOE Patents [OSTI]

An adjustment mechanism such as a three point spherical mount for adjustably supporting a planer mirror or other type of arrangement relative to a plane defined by a given pair of perpendicular axes is described in this disclosure. This mechanism provides for positioning within the plane defined by the given pair of intersecting perpendicular axes. Limited positioning is possible about either of these axes and provides for a ''non-floating'' center of adjustment.

Cutburth, R.W.

1985-11-08T23:59:59.000Z

231

Optical performance of the TBC-2 solar collector before and after the 1993 mirror lustering  

SciTech Connect (OSTI)

In 1993, the mirror facets of one of Sandia`s point-focusing solar collectors, the Test Bed Concentrator {number_sign}2 (TBC-2), were reconditioned. The concentrator`s optical performance was evaluated before and after this operation. This report summarizes and compares the results of these tests. The tests demonstrated that the concentrator`s total power and peak flux were increased while the overall flux distribution in the focal plane remained qualitatively the same.

Houser, R.; Strachan, J. [Sandia National Labs., Albuquerque, NM (United States). Solar Thermal Test Dept.

1995-02-01T23:59:59.000Z

232

Advanced ultraviolet-resistant silver mirrors for use in solar reflectors  

DOE Patents [OSTI]

A silver mirror construction that maintains a high percentage of hemispherical reflectance throughout the UV and visible spectrum when used in solar reflectors, comprising:a) a pressure sensitive adhesive layer positioned beneath a silver overlay;b) a polymer film disposed on the silver overlay;c) an adhesive layer positioned on the polymer film; andd) a UV screening acrylic film disposed on the adhesive layer.

Jorgensen, Gary J. (Pine, CO); Gee, Randy (Arvada, CO)

2009-11-03T23:59:59.000Z

233

Cross-check of ex-situ and in-situ metrology of a bendable temperature stabilized KB mirror  

SciTech Connect (OSTI)

At the Advanced Light Source (ALS), we are developing broadly applicable, high-accuracy, in-situ, at-wavelength wavefront slope measurement techniques for Kirkpatrick-Baez (KB) mirror nano-focusing. In this paper, we report an initial cross-check of ex-situ and in-situ metrology of a bendable temperature stabilized KB mirror. This cross-check provides a validation of the in-situ shearing interferometry currently under development at the ALS.

Yuan, Sheng Sam; Goldberg, Kenneth A.; Yashchuk, Valeriy V.; Celestre, Richard; McKinney, Wayne R.; Morrison, Gregory; Macdougall, James; Mochi, Iacopo; Warwick, Tony

2010-09-15T23:59:59.000Z

234

Application Of The Phase Shifting Diffraction Interferometer For Measuring Convex Mirrors And Negative Lenses  

DOE Patents [OSTI]

To measure a convex mirror, a reference beam and a measurement beam are both provided through a single optical fiber. A positive auxiliary lens is placed in the system to give a converging wavefront onto the convex mirror under test. A measurement is taken that includes the aberrations of the convex mirror as well as the errors due to two transmissions through the positive auxiliary lens. A second measurement provides the information to eliminate this error. A negative lens can also be measured in a similar way. Again, there are two measurement set-ups. A reference beam is provided from a first optical fiber and a measurement beam is provided from a second optical fiber. A positive auxiliary lens is placed in the system to provide a converging wavefront from the reference beam onto the negative lens under test. The measurement beam is combined with the reference wavefront and is analyzed by standard methods. This measurement includes the aberrations of the negative lens, as well as the errors due to a single transmission through the positive auxiliary lens. A second measurement provides the information to eliminate this error.

Sommargren, Gary E. (Santa Cruz, CA); Campbell, Eugene W. (Livermore, CA)

2005-06-21T23:59:59.000Z

235

Lifetime Prediction for Degradation of Solar Mirrors using Step-Stress Accelerated Testing (Presentation)  

SciTech Connect (OSTI)

This research is to illustrate the use of statistical inference techniques in order to quantify the uncertainty surrounding reliability estimates in a step-stress accelerated degradation testing (SSADT) scenario. SSADT can be used when a researcher is faced with a resource-constrained environment, e.g., limits on chamber time or on the number of units to test. We apply the SSADT methodology to a degradation experiment involving concentrated solar power (CSP) mirrors and compare the results to a more traditional multiple accelerated testing paradigm. Specifically, our work includes: (1) designing a durability testing plan for solar mirrors (3M's new improved silvered acrylic "Solar Reflector Film (SFM) 1100") through the ultra-accelerated weathering system (UAWS), (2) defining degradation paths of optical performance based on the SSADT model which is accelerated by high UV-radiant exposure, and (3) developing service lifetime prediction models for solar mirrors using advanced statistical inference. We use the method of least squares to estimate the model parameters and this serves as the basis for the statistical inference in SSADT. Several quantities of interest can be estimated from this procedure, e.g., mean-time-to-failure (MTTF) and warranty time. The methods allow for the estimation of quantities that may be of interest to the domain scientists.

Lee, J.; Elmore, R.; Kennedy, C.; Gray, M.; Jones, W.

2011-09-01T23:59:59.000Z

236

Application of the phase shifting diffraction interferometer for measuring convex mirrors and negative lenses  

DOE Patents [OSTI]

To measure a convex mirror, a reference beam and a measurement beam are both provided through a single optical fiber. A positive auxiliary lens is placed in the system to give a converging wavefront onto the convex mirror under test. A measurement is taken that includes the aberrations of the convex mirror as well as the errors due to two transmissions through the positive auxiliary lens. A second, measurement provides the information to eliminate this error. A negative lens can also be measured in a similar way. Again, there are two measurement set-ups. A reference beam is provided from a first optical fiber and a measurement beam is provided from a second optical fiber. A positive auxiliary lens is placed in the system to provide a converging wavefront from the reference beam onto the negative lens under test. The measurement beam is combined with the reference wavefront and is analyzed by standard methods. This measurement includes the aberrations of the negative lens, as well as the errors due to a single transmission through the positive auxiliary lens. A second measurement provides the information to eliminate this error.

Sommargren, Gary E.; Campbell, Eugene W.

2004-03-09T23:59:59.000Z

237

ECRH and transport modeling in tandem mirrors and divertor physics. Task II. Annual progress report on fusion plasma theory, January 1-September 31, 1982  

SciTech Connect (OSTI)

A summary of work during this period is given for the following: ecrh and transport modeling in tandem mirrors and divertor physics. (MOW)

Emmert, G A

1982-08-01T23:59:59.000Z

238

Surface Roughness of Stainless Steel Bender Mirrors for FocusingSoft X-rays  

SciTech Connect (OSTI)

We have used polished stainless steel as a mirror substrate to provide focusing of soft x-rays in grazing incidence reflection. The substrate is bent to an elliptical shape with large curvature and high stresses in the substrate require a strong elastic material. Conventional material choices of silicon or of glass will not withstand the stress required. The use of steel allows the substrates to be polished and installed flat, using screws in tapped holes. The ultra-high-vacuum bender mechanism is motorized and computer controlled. These mirrors are used to deliver focused beams of soft x-rays onto the surface of a sample for experiments at the Advanced Light Source (ALS). They provide an illumination field that can be as small as the mirror demagnification allows, for localized study, and can be enlarged, under computer control,for survey measurements over areas of the surface up to several millimeters. The critical issue of the quality of the steel surface, polished and coated with gold, which limits the minimum achievable focused spot size is discussed in detail. Comparison is made to a polished, gold coated, electroless nickel surface, which provides a smoother finish. Surface measurements are presented as power spectral densities, as a function of spatial frequency. The surface height distributions measured with an interferometric microscope, and complemented by atomic force microscope measurements, are used to compute power spectral densities and then to evaluate the surface roughness. The effects of roughness in reducing the specular reflectivity are verified by soft x-ray measurements.

Yashchuk, Valeriy V.; Gullikson, Eric M.; Howells, Malcolm R.; Irick, Steve C.; MacDowell, Alastair A.; McKinney, Wayne R.; Salmassi,Farhad; Warwick, Tony; Metz, James P.; Tonnessen, Thomas W.

2005-10-11T23:59:59.000Z

239

Durable silver mirror with ultra-violet thru far infra-red reflection  

DOE Patents [OSTI]

A durable highly reflective silver mirror characterized by high reflectance in a broad spectral range of about 300 nm in the UV to the far infrared (.about.10000 nm), as well as exceptional environmental durability. A high absorptivity metal underlayer is used which prevents the formation of a galvanic cell with a silver layer while increasing the reflectance of the silver layer. Environmentally durable overcoat layers are provided to enhance mechanical and chemical durability and protect the silver layer from corrosion and tarnishing, for use in a wide variety of surroundings or climates, including harsh or extreme environments.

Wolfe, Jesse D. (Discovery Bay, CA)

2010-11-23T23:59:59.000Z

240

Development of fast steering mirror control system for plasma heating and diagnostics  

SciTech Connect (OSTI)

A control system for a fast steering mirror has been newly developed for the electron cyclotron heating (ECH) launchers in the large helical device. This system enables two-dimensional scan during a plasma discharge and provides a simple feedback control function. A board mounted with a field programmable gate array chip has been designed to realize feedback control of the ECH beam position to maintain higher electron temperature by ECH. The heating position is determined by a plasma diagnostic signal related to the electron temperature such as electron cyclotron emission and Thomson scattering.

Okada, K., E-mail: okada.kohta@LHD.nifs.ac.jp; Kubo, S.; Shimozuma, T.; Yoshimura, Y.; Igami, H.; Takahashi, H.; Tanaka, K.; Kobayashi, S.; Ito, S.; Mizuno, Y.; Ogasawara, S. [National Institute for Fusion Science, Toki, Gifu 509-5292 (Japan); Nishiura, M. [Department of Advanced Energy, Graduate School of Frontier Sciences, The University of Tokyo, Kashiwa, Chiba 277-8561 (Japan)

2014-11-15T23:59:59.000Z

Note: This page contains sample records for the topic "appendages mirrors bumpers" 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

Surface roughness of stainless-steel mirrors for focusing soft x rays  

SciTech Connect (OSTI)

We have used polished stainless steel as a mirror substrate to provide focusing of soft x rays in grazing-incidence reflection. The critical issue of the quality of the steel surface,polished and coated with gold, is discussed in detail. A comparison is made to a polished,gold-coated, electroless nickel surface, which provides a smoother finish. We used the surface height distributions, measured with an interferometric microscope and complemented by atomic-force microscope measurements, to compute power spectral densities and then to evaluate the surface roughness. The effects of roughness in reducing the specular reflectivity were verified by soft-x-ray measurements.

Yashchuk, Valeriy V.; Gullikson, Eric M.; Howells, Malcolm R.; Irick, Steve C.; MacDowell, Alastair A.; McKinney, Wayne R.; Salmassi, Farhad; Warwick, Tony; Metz, James P.; Tonnessen, Thomas W

2006-07-10T23:59:59.000Z

242

On the mirror instability in the presence of electron temperature anisotropy  

SciTech Connect (OSTI)

Computation of the mirror instability growth rate in an ion-electron bi-Maxwellian plasma is revisited, starting from the low-frequency kinetic theory. The role of the electron finite Larmor radius (FLR) effects on the instability quenching is shown to possibly be dominant, even near threshold where the smallest unstable scales significantly exceed the electron gyroscale. Validation of the results by comparison with predictions of the fully kinetic whamp software is also presented. The influence of the electron temperatures on the ion FLR effects very near threshold, where the electron kinetic effects are negligible, is also pointed out.

Kuznetsov, E. A. [P.N. Lebedev Physical Institute RAS, 53 Leninsky Ave., 119991 Moscow, Russia and Space Research Institute, 84/31 Profsoyuznaya St., 117997 Moscow (Russian Federation); Passot, T.; Sulem, P. L. [Universite de Nice Sophia Antipolis, CNRS, Observatoire de la Cote d'Azur, B.P. 4229, 06304 Nice Cedex 4 (France)

2012-09-15T23:59:59.000Z

243

Cleanable and Hardcoat Coatings for Increased Durability of Silvered Polymeric Mirrors  

SciTech Connect (OSTI)

We have successfully developed coating formulations which significantly increasethe abrasion resistance of mirror films. We have demonstrated manufacturing scale-up of these films to full width andproduction volumes. Implementation of these films in commercial test sites is planned for Q2 2013(Abengoa, Gossamer Space Frames). This slide show outlines the background and objectives of the project, technical approach and results, and key lessons. It also presents the need and opportunity for reduction of costs for CSP and collectors. It also presents an approach for a large aperture parabolic trough collector with reflective film and a high concentration factor, including demonstration and results.

Padiyath, Raghunath

2013-04-01T23:59:59.000Z

244

Isorotation and differential rotation in a magnetic mirror with imposed E Multiplication-Sign B rotation  

SciTech Connect (OSTI)

Doppler spectroscopy of helium impurities in the Maryland Centrifugal Experiment reveals the simultaneous existence of isorotating and differentially rotating magnetic surfaces. Differential rotation occurs at the innermost surfaces and is conjectured to cause plasma voltage oscillations of hundreds of kilohertz by periodically changing the current path inductance. High-speed images show the periodic expulsion of plasma near the mirror ends at the same frequencies. In spite of this, the critical ionization velocity limit is exceeded, with respect to the vacuum field definition, for at least 0.5 ms.

Romero-Talamas, C. A.; Elton, R. C.; Young, W. C.; Reid, R.; Ellis, R. F. [Institute for Research in Electronics and Applied Physics, University of Maryland, College Park, Maryland 20742 (United States)

2012-07-15T23:59:59.000Z

245

The use of a high-order MEMS deformable mirror in the Gemini Planet Imager  

SciTech Connect (OSTI)

We briefly review the development history of the Gemini Planet Imager's 4K Boston Micromachines MEMS deformable mirror. We discuss essential calibration steps and algorithms to control the MEMS with nanometer precision, including voltage-phase calibration and influence function characterization. We discuss the integration of the MEMS into GPI's Adaptive Optics system at Lawrence Livermore and present experimental results of 1.5 kHz closed-loop control. We detail mitigation strategies in the coronagraph to reduce the impact of abnormal actuators on final image contrast.

Poyneer, L A; Bauman, B; Cornelissen, S; Jones, S; Macintosh, B; Palmer, D; Isaacs, J

2010-12-17T23:59:59.000Z

246

Enhanced visible and near-infrared capabilities of the JET mirror-linked divertor spectroscopy system  

SciTech Connect (OSTI)

The mirror-linked divertor spectroscopy diagnostic on JET has been upgraded with a new visible and near-infrared grating and filtered spectroscopy system. New capabilities include extended near-infrared coverage up to 1875 nm, capturing the hydrogen Paschen series, as well as a 2 kHz frame rate filtered imaging camera system for fast measurements of impurity (Be II) and deuterium D?, D?, D? line emission in the outer divertor. The expanded system provides unique capabilities for studying spatially resolved divertor plasma dynamics at near-ELM resolved timescales as well as a test bed for feasibility assessment of near-infrared spectroscopy.

Lomanowski, B. A., E-mail: b.a.lomanowski@durham.ac.uk; Sharples, R. M. [Centre for Advanced Instrumentation, Department of Physics, Durham University, Durham DH1 3LE (United Kingdom); Meigs, A. G.; Conway, N. J.; Zastrow, K.-D.; Heesterman, P.; Kinna, D. [EURATOM/CCFE Fusion Association, Culham Science Center, Abingdon OX14 3DB (United Kingdom); Collaboration: JET-EFDA Team

2014-11-15T23:59:59.000Z

247

Principles of passive and active cooling of mirror-based hybrid systems employing liquid metals  

SciTech Connect (OSTI)

This paper presents principles of passive and active cooling that are suitable to mirrorbased hybrid, nuclear fission/fusion systems. It is shown that liquid metal lead-bismuth cooling of the mirror machine with 25 m height and 1.5 GW thermal power is feasible both in the active mode during the normal operation and in the passive mode after the reactor shutdown. In the active mode the achievable required pumping power can well be below 50 MW, whereas the passive mode provides enough coolant flow to keep the clad temperature below the damage limits.

Anglart, Henryk [Div. of Nuclear Technology, School of Engineering Sciences, Royal Institute of Technology Roslagstullsbacken 21, 106-91 Stockholm (Sweden)

2012-06-19T23:59:59.000Z

248

Photo of the Week: Inside the Tandem Mirror Experiment | Department of  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious RankCombustion | Department ofT ib l L d F SSalesOE0000652GrowE-mail on August 24,AEnergy Tandem Mirror

249

Photo of the Week: The Mirror Fusion Test Facility | Department of Energy  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious RankCombustion | Department ofT ib l L d F SSalesOE0000652GrowE-mail onThe Mirror Fusion Test Facility Photo

250

Mirror symmetry breaking with limited enantioselective autocatalysis and temperature gradients: a stability survey  

E-Print Network [OSTI]

We analyze limited enantioselective (LES) autocatalysis in a temperature gradient and with internal flow/recycling of hot and cold material. Microreversibility forbids broken mirror symmetry for LES in the presence of a temperature gradient alone. This symmetry can be broken however when the auto-catalysis and limited enantioselective catalysis are each localized within the regions of low and high temperature, respectively. This scheme has been recently proposed as a plausible model for spontaneous emergence of chirality in abyssal hydrothermal vents. Regions in chemical parameter space are mapped out in which the racemic state is unstable and bifurcates to chiral solutions.

Blanco, Celia; Crusats, Joaquim; El-Hachemi, Zoubir; Moyano, Albert; Hochberg, David; 10.1039/C2CP43488A

2012-01-01T23:59:59.000Z

251

Application of modern-control-design methodologies to a multi-segmented deformable-mirror system. Master's thesis  

SciTech Connect (OSTI)

The multi-segmented deformable mirror system is proposed as an element for a portion of a ballistic missile defense system. The size of the mirror required for this defense function requires that the mirror be developed in segments, and then these segments should be phased together to produce one continuous, large optic. The application of multivariable control system synthesis techniques to provide closed-loop wavefront control of the deformable mirror system is the problem discussed in this thesis. The method of H at infinity control system synthesis using loop-shaping techniques was used to develop a controller that meets a robust performance specification. The number and location of sensors was treated as a design variable, and the structured singular value (mu) was used to determine the performance robustness of the deformable mirror system. Decentralized control issues are also addressed through the use of necessary conditions in an effort to determine a suitable decentralized control structure with performance similar to that of the centralized controller.

Vaughan, E.M.

1991-05-23T23:59:59.000Z

252

Excitons in a mirror: Formation of “optical bilayers” using MoS{sub 2} monolayers on gold substrates  

SciTech Connect (OSTI)

We report coupling of excitons in monolayers of molybdenum disulphide to their mirror image in an underlying gold substrate. Excitons at the direct band gap are little affected by the substrate whereas strongly bound C-excitons associated with a van-Hove singularity change drastically. On quartz substrates only one C-exciton is visible (in the blue) but on gold substrates a strong red-shifted extra resonance in the green is seen. Exciton coupling to its image leads to formation of a “mirror biexciton” with enhanced binding energy. Estimates of this energy shift in an emitter-gold system match experiments well. The absorption spectrum of MoS{sub 2} on gold thus resembles a bilayer of MoS{sub 2} which has been created by optical coupling. Additional top-mirrors produce an “optical bulk.”.

Mertens, Jan; Baumberg, Jeremy J., E-mail: jjb12@cam.ac.uk [Nanophotonics Centre, Cavendish Laboratory, University of Cambridge, Cambridge CB3 0HE (United Kingdom); Shi, Yumeng; Yang, Hui Ying, E-mail: yanghuiying@sutd.edu.sg [Pillar of Engineering Product Development, Singapore University of Technology and Design, Singapore 138682 (Singapore); Molina-Sánchez, Alejandro; Wirtz, Ludger [Physics and Materials Science Research Unit, University of Luxembourg, L-1511 Luxembourg (Luxembourg)

2014-05-12T23:59:59.000Z

253

Morphologies of laser-induced damage in hafnia-silica multilayer mirror and polarizer coatings  

SciTech Connect (OSTI)

Hafnium-silica multilayer mirrors and polarizers were deposited by e-beam evaporation onto BK7 glass substrates. The mirrors and polarizers were coated for operation at 1053 nm at 45{degree} and at Brewster`s angle (56{degree}), respectively. They were tested with a single 3-ns laser pulse. Morphology of the laser-induced damage was characterized by optical and scanning electron microscopy. Four distinct damage morphologies were found: pits, flatbottom pits, scalds, and delaminates. The pits and flat bottom pits (<30{mu}m dia) were detected at lower fluences (as low as 5 J/cm{sup 2}). The pits seemed to result from ejection of nodular defects by causing local enhancement of the electric field. Scalds and delaminates could be observed at higher fluences (above 13 J/cm{sup 2}) and seemed to result from the formation of plasmas on the surface. These damage types often originated at pits and were less than 300 {mu}m diameter; their size increased almost linearly with fluence. Finally, effects of the damage on the beam (reflectivity degradation and phase modulations) were measured.

Genin, F.Y.; Stolz, C.J.

1996-08-01T23:59:59.000Z

254

Photo-Thermal Transfer Function of Dielectric Mirrors for Precision Measurements  

E-Print Network [OSTI]

The photo-thermal transfer function from absorbed power incident on a dielectric mirror to the effective mirror position is calculated using the coating design as input. The effect is found to change in amplitude and sign for frequencies corresponding to diffusion length comparable to the coating thickness. Transfer functions are calculated for the $Ti$-doped ${\\rm Ta_2O_5:SiO_2}$ coating used in Advanced LIGO and for a crystalline ${\\rm Al_xGa_{1-x}As}$ coating. The shape of the transfer function at high frequencies is shown to be a sensitive indicator of the effective absorption depth, providing a potentially powerful tool to distinguish coating-internal absorption from surface contamination related absorption. The sign change of the photo-thermal effect could also be useful to stabilize radiation pressure-based opto-mechanical systems. High frequency corrections to the previously published thermo-optic noise estimates are also provided. Finally, estimating the quality of the thermo-optic noise cancellation occurring in fine-tuned ${\\rm Al_xGa_{1-x}As}$ coatings requires the detailed heat flow analysis done in this paper.

Stefan W. Ballmer

2015-01-07T23:59:59.000Z

255

A spinning mirror for fast angular scans of EBW emission for magnetic pitch profile measurements  

SciTech Connect (OSTI)

A tilted spinning mirror rapidly steers the line of sight of the electron Bernstein wave (EBW) emission radiometer at the Mega-Amp Spherical Tokamak (MAST). In order to resist high mechanical stresses at rotation speeds of up to 12 000 rpm and to avoid eddy current induced magnetic braking, the mirror consists of a glass-reinforced nylon substrate of a special self-balanced design, coated with a reflecting layer. By completing an angular scan every 2.5-10 ms, it allows one to characterize with good time resolution the Bernstein-extraordinary-ordinary mode-conversion efficiency as a function of the view angles. Angular maps of conversion efficiency are directly related to the magnetic pitch angle at the cutoff layer for the ordinary mode. Hence, measurements at various frequencies provide the safety factor profile at the plasma edge. Initial measurements and indications of the feasibility of the diagnostic are presented. Moreover, angular scans indicate the best launch conditions for EBW heating.

Volpe, Francesco [Department of Engineering Physics, University of Wisconsin, Madison, Wisconsin 53706 (United States)

2010-10-15T23:59:59.000Z

256

Passive faraday mirror attack in practical two-way quantum key distribution system  

E-Print Network [OSTI]

The faraday mirror (FM) plays a very important role in maintaining the stability of two way plug-and-play quantum key distribution (QKD) system. However, the practical FM is imperfect, which will not only introduce additional quantum bit error rate (QBER) but also leave a loophole for Eve to spy the secret key. In this paper, we propose a passive faraday mirror attack in two way QKD system based on the imperfection of FM. Our analysis shows that, if the FM is imperfect, the dimension of Hilbert space spanned by the four states sent by Alice is three instead of two. Thus Eve can distinguish these states with a set of POVM operators belonging to three dimension space, which will reduce the QBER induced by her attack. Furthermore, a relationship between the degree of the imperfection of FM and the transmittance of the practical QKD system is obtained. The results show that, the probability that Eve loads her attack successfully depends on the degree of the imperfection of FM rapidly, but the QBER induced by Eve's attack changes with the degree of the imperfection of FM slightly.

Shi-Hai Sun; Mu-Sheng Jiang; Lin-Mei Liang

2012-03-04T23:59:59.000Z

257

Passive Faraday-mirror attack in a practical two-way quantum-key-distribution system  

SciTech Connect (OSTI)

The Faraday mirror (FM) plays a very important role in maintaining the stability of two-way plug-and-play quantum key distribution (QKD) systems. However, the practical FM is imperfect, which will not only introduce an additional quantum bit error rate (QBER) but also leave a loophole for Eve to spy the secret key. In this paper we propose a passive Faraday mirror attack in two-way QKD system based on the imperfection of FM. Our analysis shows that if the FM is imperfect, the dimension of Hilbert space spanned by the four states sent by Alice is three instead of two. Thus Eve can distinguish these states with a set of Positive Operator Valued Measure (POVM) operators belonging to three-dimension space, which will reduce the QBER induced by her attack. Furthermore, a relationship between the degree of the imperfection of FM and the transmittance of the practical QKD system is obtained. The results show that the probability that Eve loads her attack successfully depends on the degree of the imperfection of FM rapidly, but the QBER induced by Eve's attack changes slightly with the degree of the FM imperfection.

Sun Shihai; Jiang Musheng; Liang Linmei [Department of Physics, National University of Defense Technology, Changsha 410073 (China)

2011-06-15T23:59:59.000Z

258

Approximate Mirror Symmetry in Heliospheric Plasma Flow Explains VOYAGER 2 Observations  

E-Print Network [OSTI]

The Sun and the undisturbed interstellar magnetic field and plasma velocity vectors (Bis,Vis) define a mirror symmetry plane of the flow at large heliospheric distances. We show that for the Bis direction defined by IBEX Ribbon center, the radial direction of Voyager 2 over the last decade, and the (thermal proton) plasma velocity measured by the spacecraft since 2010.5, are almost parallel to the (Bis,Vis)-plane, which coincides in practice with the Hydrogen Deflection Plane. These facts can be simply explained if approximate mirror symmetry is also maintained on the inner side of the heliopause. Such approximate symmetry is possible since the solar wind ram pressure is almost spherically symmetric and the plasma beta value in the inner heliosheath is high. In the proposed symmetry, the plasma flow speed measured by Voyager 2 in the inner heliosheath is expected to rotate more in the transverse than in the polar direction (explanation alternative to McComas & Schwadron (2014)), in evident agreement with ...

Grygorczuk, Jolanta; Grzedzielski, Stan

2015-01-01T23:59:59.000Z

259

Development of mirrors made of chemically tempered glass foils for future X-ray telescopes  

E-Print Network [OSTI]

Thin slumped glass foils are considered good candidates for the realization of future X-ray telescopes with large effective area and high spatial resolution. However, the hot slumping process affects the glass strength, and this can be an issue during the launch of the satellite because of the high kinematical and static loads occurring during that phase. In the present work we have investigated the possible use of Gorilla glass (produced by Corning), a chemical tempered glass that, thanks to its strength characteristics, would be ideal. The un-tempered glass foils were curved by means of an innovative hot slumping technique and subsequently chemically tempered. In this paper we show that the chemical tempering process applied to Gorilla glass foils does not affect the surface micro-roughness of the mirrors. On the other end, the stress introduced by the tempering process causes a reduction in the amplitude of the longitudinal profile errors with a lateral size close to the mirror length. The effect of the ov...

Salmaso, B; Brizzolari, B; Basso, S; Ghigo, M; Pareschi, G; Spiga, D; Proserpio, L; Suppiger, Y

2015-01-01T23:59:59.000Z

260

Effect of quark exchange on the structure function of A = 3 mirror nuclei and neutron/proton structure function ratio  

SciTech Connect (OSTI)

By using quark-exchange formalism and realistic Faddeev wave functions, we investigate deep inelastic electron scattering from A = 3 mirror nuclei. The initial valence quarks input are taken from the GRV's calculations on F{sub 2}{sup P}(x, Q{sup 2}) which gives very good fit to the available data in the (x, Q2)-plane. It is shown that the free neutron to proton structure functions ratio can be extracted from corresponding EMC ratios for 3He and 3H mirror nuclei. The results are in good agreement with other theoretical models as well as present available experimental data.

Zolfagharpour, F.; Modarres, M. [Physics Department, University of Tehran, 1439955961, Tehran (Iran, Islamic Republic of); Yazdanpanah, M.M. [Physics Department, Shahid-Ba-Honar University, Kerman (Iran, Islamic Republic of)

2005-10-26T23:59:59.000Z

Note: This page contains sample records for the topic "appendages mirrors bumpers" 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

Grazing incidence liquid metal mirrors (GILMM) for radiation hardened final optics for laser inertial fusion energy power plants*  

E-Print Network [OSTI]

final optics in a laser inertial fusion energy (IFE) power plant. The amount of laser light the GILMM1 Grazing incidence liquid metal mirrors (GILMM) for radiation hardened final optics for laser inertial fusion energy power plants* R. W. Moir November 29, 1999 Lawrence Livermore National Laboratory

California at Los Angeles, University of

262

Application of optical triangulation profilometry and optical phase ranging profilometry to the figure evaluation of solar mirrors  

SciTech Connect (OSTI)

The techniques of optical triangulation profilometry (OTP) and optical phase ranging profilometry (OPRP) are proposed for evaluation of the figure of solar mirrors. The theoretical basis for each method is discussed and the results of initial feasibility experiments are reported. In OTP and OPRP the de-specularized mirror surface is probed with one or more visible laser beams. In OTP, two beams are required for the triangulation of coordinates on the mirror surface. In OPRP the second laser beam is retained within the instrument to form the reference leg of a long wavelength interferometer. Both methods are particularly adaptable to computer control for fast, automated analysis of mirror surfaces. In addition the proposed devices are compact and sturdy enough for easy implementation in field evaluation programs. The experimental resolution capability of the unoptimized OTP system is greater than or equal to 0.1 inch (2.54 mm). With further improvement of the beam projection and coincidence assessment systems, the design resolution goal of greater than or equal to 0.1 mm appears achievable. The results of the preliminary resolution capability experiments on the OPRP system are inconclusive. This is thought to be a result of poor performance of components comprising the modulation and detection subsystems. A full assessment of OPRP capability will require a further investigation effort.

Griffin, J.W.; Lind, M.A.

1980-12-01T23:59:59.000Z

263

July 1, 2001 / Vol. 26, No. 13 / OPTICS LETTERS 989 Waveguide grating mirror for large-area semiconductor lasers  

E-Print Network [OSTI]

was demonstrated in Ref. 7. A similar scheme with near-infrared dye was reported in Ref. 8 On a smaller scale a waveguide grating mirror that uses anomalous reflection of light associ- ated with excitation of waveguide. Anomalous reflection in the case of a lossless waveguide can approach 100% close to resonant wave- guide

Avrutsky, Ivan

264

620 OPTICS LETTERS / Vol. 29, No. 6 / March 15, 2004 Damage to extreme-ultraviolet Sc Si multilayer mirrors  

E-Print Network [OSTI]

620 OPTICS LETTERS / Vol. 29, No. 6 / March 15, 2004 Damage to extreme-ultraviolet Sc Si multilayer, Russia Received August 21, 2003 The damage threshold and damage mechanism of extreme-ultraviolet Sc Si multilayer mirror coatings are investigated with focused nanosecond pulses at 46.9-nm radiation from

Rocca, Jorge J.

265

Electronic film with embedded micro-mirrors for solar energy concentrator systems  

E-Print Network [OSTI]

A novel electronic film solar energy concentrator with embedded micro-mirrors that track the sun is described. The potential viability of this new concept is presented. Due to miniaturization, the amount of material needed for the optical system is minimal. Because it is light-weight and flexible, it can easily be attached to the land or existing structures. This presents an economic advantage over conventional concentrators which require the construction of a separate structure to support them, and motors to orient them to intercept and properly reflect sunlight. Such separate structures must be able to survive gusts, windstorms, earthquakes, etc. This concentrator utilizes the ground or existing edifices which are already capable of withstanding such vicissitudes of nature.

Rabinowitz, M; Rabinowitz, Mario; Davidson, Mark

2004-01-01T23:59:59.000Z

266

Diurnal modulation due to self-interacting mirror and hidden sector dark matter  

SciTech Connect (OSTI)

Mirror and more generic hidden sector dark matter models can simultaneously explain the DAMA, CoGeNT and CRESST-II dark matter signals consistently with the null results of the other experiments. This type of dark matter can be captured by the Earth and shield detectors because it is self-interacting. This effect will lead to a diurnal modulation in dark matter detectors. We estimate the size of this effect for dark matter detectors in various locations. For a detector located in the northern hemisphere, this effect is expected to peak in April and can be detected for optimistic parameter choices. The diurnal variation is expected to be much larger for detectors located in the southern hemisphere. In particular, if the CoGeNT detector were moved to e.g. Sierra Grande, Argentina then a 5? dark matter discovery would be possible in around 30 days of operation.

Foot, R., E-mail: rfoot@unimelb.edu.au [ARC Centre of Excellence for Particle Physics at the Terascale, School of Physics, University of Melbourne, Melbourne, Victoria 3010 (Australia)

2012-04-01T23:59:59.000Z

267

Achievement of a record electron temperature for a magnetic mirror device  

E-Print Network [OSTI]

We demonstrate plasma discharges with extremely high temperature of bulk electrons at the large axially symmetric magnetic mirror device GDT (Budker Institute, Novosibirsk). According to Thomson scattering measurements, the on-axis electron temperature averaged over several sequential shots is 660 $\\pm$ 50 eV with peak values exceeding 900 eV in few shots. This corresponds to at least threefold increase as compared to previous experiments both at the GDT and at other comparable machines, thus demonstrating the maximum quasi-stationary (~1 ms) electron temperature achieved in open traps. The breakthrough is made possible with application of sophisticated electron cyclotron resonance heating in addition to standard heating by neutral beams. The reported increase of the electron temperature along with previous experiments, which demonstrated high-density plasma confinement with $\\beta\\approx$ 60%, provide a firm basis for extrapolating to fusion relevant applications of open magnetic systems.

Bagryansky, P A; Lizunov, A A; Maximov, V V; Prikhodko, V V; Shalashov, A G; Soldatkina, E I; Solomakhin, A L; Yakovlev, D V

2014-01-01T23:59:59.000Z

268

Current Helicity and Twist as Two Indicators of The Mirror Asymmetry of solar Magnetic Fields  

E-Print Network [OSTI]

A comparison between the two tracers of magnetic field mirror asymmetry in solar active regions, twist and current helicity, is presented. It is shown that for individual active regions these tracers do not possess visible similarity while averaging by time over the solar cycle, or by latitude, reveals similarities in their behaviour. The main property of the dataset is anti-symmetry over the solar equator. Considering the evolution of helical properties over the solar cycle we find signatures of a possible sign change at the beginning of the cycle, though more systematic observational data are required for a definite confirmation. We discuss the role of both tracers in the context of the solar dynamo theory.

D. D. Sokoloff; H. Zhang; K. Kuzanyan; V. N. Obridko; D. N. Tomin; V. N. Tutubalin

2008-02-25T23:59:59.000Z

269

OPTIMIZING CENTRIFUGAL BARREL POLISHING FOR MIRROR FINISH SRF CAVITY AND RF TESTS AT JEFFERSON LAB  

SciTech Connect (OSTI)

We performed Centrifugal Barrel Polishing (CBP) on a 1.3 GHz fine grain TESLA single cell cavity and 1.5 GHz fine grain CEBAF high gradient superconducting radio frequency (SRF) single cell cavity following a modified recipe originally developed at Fermi National Accelerator Lab (FNAL). We were able to obtain a mirror like surface similar to that obtained at FNAL, while reducing the number of CBP steps and total processing time. This paper will discuss the change in surface and subsequent cavity performance post CBP, after a 800 C bake (no pre-bake chemistry) and minimal controlled electro-polishing (10 micron). In addition to Q vs. E{sub ACC} thermometry mapping with preheating characteristics and optical inspection of the cavity after CBP will also be shown.

Ari Palczewski, Rongli Geng, Hui Tian

2012-07-01T23:59:59.000Z

270

Compact tunable Compton x-ray source from laser-plasma accelerator and plasma mirror  

E-Print Network [OSTI]

We present results of the first tunable Compton backscattering (CBS) x-ray source that is based on the easily aligned combination of a laser-plasma accelerator (LPA) and a plasma mirror (PM). The LPA is driven in the blowout regime by 30 TW, 30 fs laser pulses, and produces high-quality, tunable, quasi-monoenergetic electron beams. A thin plastic film near the gas jet exit efficiently retro-reflects the LPA driving pulse with relativistic intensity into oncoming electrons to produce $2\\times10^{7}$ CBS x-ray photons per shot with 10-20 mrad angular divergence and 50 % (FWHM) energy spread without detectable bremsstrahlung background. The x-ray central energy is tuned from 75 KeV to 200 KeV by tuning the LPA e-beam central energy. Particle-in-cell simulations of the LPA, the drive pulse/PM interaction and CBS agree well with measurements.

Tsai, Hai-En; Shaw, Joseph; Li, Zhengyan; Arefiev, Alexey V; Zhang, Xi; Zgadzaj, Rafal; Henderson, Watson; Khudik, V; Shvets, G; Downer, M C

2014-01-01T23:59:59.000Z

271

Software for reflectivity calculations of x-ray mirrors. Revision 1  

SciTech Connect (OSTI)

With VAX software and the data libraries of Henke and Biggs-Lighthill, we have created a library of atomic scattering factors f/sub 1/ and f/sub 2/ in the energy range 0.1 keV to 10.0 keV. Scattering factor values for the elements Z = 1 to Z = 94 and in the above energy range are stored in a keyed access library (key = element symbol). This library allows one to calculate reflectivity rapidly and fold it with other components in an x-ray detector channel. Additional software allows the library data to be easily extended to higher energies. Applications have so far included KB x-ray microscopes and low energy spectrometers with mirror channels.

Auerbach, J.M.; Tirsell, K.G.

1984-11-28T23:59:59.000Z

272

Status of the technologies for the production of the Cherenkov Telescope Array (CTA) mirrors  

E-Print Network [OSTI]

The Cherenkov Telescope Array (CTA) is the next generation very high-energy gamma-ray observatory, with at least 10 times higher sensitivity than current instruments. CTA will comprise several tens of Imaging Atmospheric Cherenkov Telescopes (IACTs) operated in array-mode and divided into three size classes: large, medium and small telescopes. The total reflective surface could be up to 10,000 m2 requiring unprecedented technological efforts. The properties of the reflector directly influence the telescope performance and thus constitute a fundamental ingredient to improve and maintain the sensitivity. The R&D status of lightweight, reliable and cost-effective mirror facets for the CTA telescope reflectors for the different classes of telescopes is reviewed in this paper.

Pareschi, G; Baba, H; Bähr, J; Bonardi, A; Bonnoli, G; Brun, P; Canestrari, R; Chadwick, P; Chikawa, M; Carton, P -H; de Souza, V; Dipold, J; Doro, M; Durand, D; Dyrda, M; Förster, A; Garczarczyk, M; Giro, E; Glicenstein, J -F; Hanabata, Y; Hayashida, M; Hrabovski, M; Jeanney, C; Kagaya, M; Katagiri, H; Lessio, L; Mandat, D; Mariotti, M; Medina, C; Micha?owski, J; Micolon, P; Nakajima, D; Niemiec, J; Nozato, A; Palatka, M; Pech, M; Peyaud, B; Pühlhofer, G; Rataj, M; Rodeghiero, G; Rojas, G; Rousselle, J; Sakonaka, R; Schovanek, P; Seweryn, K; Schultz, C; Shu, S; Stinzing, F; Stodulski, M; Teshima, M; Travniczek, P; van Eldik, C; Vassiliev, V; Wi?niewski, ?; Wörnlein, A; Yoshida, T

2013-01-01T23:59:59.000Z

273

Deep Inelastic Electron Scattering Off the Helium and Tritium Mirror Nuclei  

SciTech Connect (OSTI)

We discuss a possible measurement of the ratio of nucleon structure functions, F{sub 2}{sup n}/F{sub 2}{sup p}, and the ratio of up to down quark distributions, u/d, at large Bjorken x, by performing deep inelastic electron scattering from the {sup 3}H and {sup 3}He mirror nuclei with the 11 GeV upgraded beam of Jefferson Lab. The measurement is expected to be almost free of nuclear effects, which introduce a significant uncertainty in the extraction of these two ratios from deep inelastic scattering off the proton and deuteron. The results are expected to test perturbative and non-perturbative mechanisms of spin-flavor symmetry breaking in the nucleon, and constrain the structure function parametrizations needed for the interpretation of high energy collider and neutrino oscillations data. The precision of the expected data can also test models of the nuclear EMC effect and provide valuable input for its full explanation.

Holt, Roy J. [Physics Division, Argonne National Laboratory, Argonne, IL 60439 (United States); Petratos, Gerassimos G. [Department of Physics, Kent State University, Kent, OH 44242 (United States)

2011-09-21T23:59:59.000Z

274

Electronic film with embedded micro-mirrors for solar energy concentrator systems  

E-Print Network [OSTI]

A novel electronic film solar energy concentrator with embedded micro-mirrors that track the sun is described. The potential viability of this new concept is presented. Due to miniaturization, the amount of material needed for the optical system is minimal. Because it is light-weight and flexible, it can easily be attached to the land or existing structures. This presents an economic advantage over conventional concentrators which require the construction of a separate structure to support them, and motors to orient them to intercept and properly reflect sunlight. Such separate structures must be able to survive gusts, windstorms, earthquakes, etc. This concentrator utilizes the ground or existing edifices which are already capable of withstanding such vicissitudes of nature.

Mario Rabinowitz; Mark Davidson

2004-04-16T23:59:59.000Z

275

Mirror symmetry in the energy spectra of $n$-level systems  

E-Print Network [OSTI]

The energy spectrum of a system of $N_a$ atoms of $n$ levels interacting with a one-mode electromagnetic field is studied in the dipole and rotating wave approximations. We find that, under the resonant condition, it exhibits a mirror symmetry with respect to the energy $E=M$ where $M$ the total number of excitations. Thus, for any eigenstate $|\\psi_M^{+}\\rangle$ with energy $E=M+{\\cal E}$ there exists a related eigenstate $|\\psi_M^{-}\\rangle$ with energy $E=M-{\\cal E}$ via the unitary parity operator in the number of photons . This is independent of the dipolar coupling between the levels. We give explicit examples for $3$-level systems.

S. Cordero; O. Castaños; R. López--Peña; E. Nahmad--Achar

2014-03-15T23:59:59.000Z

276

Flute instability in the tandem mirror with the divertor/dipole regions  

SciTech Connect (OSTI)

The numerical simulation is performed in GAMMA10 A-divertor magnetic configuration, which is a candidate of remodeled device of the GAMMA10 tandem mirror [M. Inutake et al., Phys. Rev. Lett. 55, 939 (1985)]. Both divertor and dipole regions are included in the numerical calculation, which is a new point. The electron short circuit effect along x-point, therefore, is not assumed so that it is not used the boundary condition of the electrostatic perturbations being zero at the separatrix on which the magnetic field lines pass through x-point. The simulation results reveal that the dipole field plays a role of a good magnetic field line curvature to the GAMMA10 A-divertor, and so the flute modes are stabilized without help of electron short circuit effects.

Katanuma, I.; Masaki, S.; Sato, S.; Sekiya, K.; Ichimura, M.; Imai, T. [Plasma Research Center, University of Tsukuba, Tsukuba, Ibaraki 305-8577 (Japan)

2011-11-15T23:59:59.000Z

277

Feasibility study of a fission supressed blanket for a tandem-mirror hybrid reactor  

SciTech Connect (OSTI)

A study of fission suppressed blankets for the tandem mirror not only showed such blankets to be feasible but also to be safer than fissioning blankets. Such hybrids could produce enough fissile material to support up to 17 light water reactors of the same nuclear power rating. Beryllium was compared to /sup 7/Li for neutron multiplication; both were considered feasible but the blanket with Li produced 20% less fissile fuel per unit of nuclear power in the reactor. The beryllium resource, while possibly being too small for extensive pure fusion application, would be adequate (with carefully planned industrial expansion) for the hybrid because of the large support ratio, and hence few hybrids required. Radiation damage and coatings for beryllium remain issues to be resolved by further study and experimentation.

Moir, R.W.; Lee, J.D.; Barr, W.L.

1981-10-05T23:59:59.000Z

278

Programmable matched filter and Hadamard transform hyperspectral imagers based on micro-mirror arrays  

SciTech Connect (OSTI)

Hyperspectral imaging (HSI), in which each pixel contains a high-resolution spectrum, is a powerful technique that can remotely detect, identify, and quantify a multitude of materials and chemicals. The advent of addressable micro-mirror arrays (MMAs) makes possible a new class of programmable hyperspectral imagers that can perform key spectral processing functions directly in the optical hardware, thus alleviating some of HSI's high computational overhead, as well as offering improved signal-to-noise in certain important regimes (e.g. when using uncooled infrared detectors). We have built and demonstrated a prototype UV-Visible micro-mirror hyperspectral imager that is capable not only of matched-filter imaging, but also of full hyperspectral imagery via the Hadamard transform technique. With this instrument, one can upload a chemical-specific spectral matched filter directly to the MMA, producing an image showing the location of that chemical without further processing. Target chemicals are changeable nearly instantaneously simply by uploading new matched-filter patterns to the MMA. Alternatively, the MMA can implement Hadamard mask functions, yielding a full-spectrum hyperspectral image upon inverting the transform. In either case, the instrument can produce the 2D spatial image either by an internal scan, using the MMA itself, or with a traditional external push-broom scan. The various modes of operation are selectable simply by varying the software driving the MMA. Here the design and performance of the prototype is discussed, along with experimental results confirming the signal-to-noise improvement produced by the Hadamard technique in the noisy-detector regime.

Love, Steven P [Los Alamos National Laboratory

2008-01-01T23:59:59.000Z

279

Comparison of slope and height profiles for flat synchrotron x-ray mirrors measured with a long trace profiler and a Fizeau interferometer.  

SciTech Connect (OSTI)

Long trace profilers (LTPS) have been used at many synchrotron radiation laboratories worldwide for over a decade to measure surface slope profiles of long grazing incidence x-ray mirrors. Phase measuring interferometers (PMIs) of the Fizeau type, on the other hand, are being used by most mirror manufacturers to accomplish the same task. However, large mirrors whose dimensions exceed the aperture of the Fizeau interferometer require measurements to be carried out at grazing incidence, and aspheric optics require the use of a null lens. While an LTP provides a direct measurement of ID slope profiles, PMIs measure area height profiles from which the slope can be obtained by a differentiation algorithm. Measurements of the two types of instruments have been found by us to be in good agreement, but to our knowledge there is no published work directly comparing the two instruments. This paper documents that comparison. We measured two different nominally flat mirrors with both the LTP in operation at the Advanced Photon Source (a type-II LTP) and a Fizeau-type PMI interferometer (Wyko model 6000). One mirror was 500 mm long and made of Zerodur, and the other mirror was 350 mm long and made of silicon. Slope error results with these instruments agree within nearly 100% (3.11 {+-} 0.15 {micro}rad for the LTP, and 3.11 {+-} 0.02 {micro}rad for the Fizeau PMI interferometer) for the medium quality Zerodur mirror with 3 {micro}rad rms nominal slope error. A significant difference was observed with the much higher quality silicon mirror. For the Si mirror, slope error data is 0.39 {+-} 0.08 {micro}rad from LTP measurements but it is 0.35 {+-} 0.01 {micro}rad from PMI interferometer measurements. The standard deviations show that the Fizeau PMI interferometer has much better measurement repeatability.

Qian, J.; Assoufid, L.; Macrander, A.; X-Ray Science Division

2007-01-01T23:59:59.000Z

280

allometric appendage growth: Topics by E-print Network  

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

1 PERSPECTIVES Allometric growth, life-history invariants and population energetics Environmental Sciences and Ecology Websites Summary: IDEAS AND PERSPECTIVES Allometric growth,...

Note: This page contains sample records for the topic "appendages mirrors bumpers" 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

appendage domain critical: Topics by E-print Network  

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

and Information Sciences Websites Summary: is that of slowly adding simulated sand to a simulated sand pile Bak. The controlling parameter is the slope. The system...

282

atrial appendage system: Topics by E-print Network  

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

work by estimating a novel algorithm for extracting atrial activity from single lead electrocardiogram (ECG) signal sustained subtraction (ABS) method using synthetic AF...

283

atrial appendage volumes: Topics by E-print Network  

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

work by estimating a novel algorithm for extracting atrial activity from single lead electrocardiogram (ECG) signal sustained subtraction (ABS) method using synthetic AF...

284

atrial appendage exclusion: Topics by E-print Network  

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

work by estimating a novel algorithm for extracting atrial activity from single lead electrocardiogram (ECG) signal sustained subtraction (ABS) method using synthetic AF...

285

atrial appendage flow: Topics by E-print Network  

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

work by estimating a novel algorithm for extracting atrial activity from single lead electrocardiogram (ECG) signal sustained subtraction (ABS) method using synthetic AF...

286

Conceptual design study FY 1981: synfuels from fusion - using the tandem mirror reactor and a thermochemical cycle to produce hydrogen  

SciTech Connect (OSTI)

This report represents the second year's effort of a scoping and conceptual design study being conducted for the express purpose of evaluating the engineering potential of producing hydrogen by thermochemical cycles using a tandem mirror fusion driver. The hydrogen thus produced may then be used as a feedstock to produce fuels such as methane, methanol, or gasoline. The main objective of this second year's study has been to obtain some approximate cost figures for hydrogen production through a conceptual design study.

Krikorian, O.H. (ed.)

1982-02-09T23:59:59.000Z

287

Survey mirrors and lenses and their required surface accuracy. Volume 2. Concentrator optical performance software (COPS) user's manual. Final report for September 15, 1978-December 1, 1979  

SciTech Connect (OSTI)

The mathematical modeling of 11 different concentrating collectors is documented and instructions are given for use of the computer code. The 11 concentrators modeled are: faceted mirror concentration; fixed mirror, two-axis tracking receiver; parabolic trough collector; linear Fresnel; incremental reflector; inflated cylindrical concentrator; CPC-involute reflector with evacuated receiver; CPC-parabolic/involute reflector; V trough collectors, imaging collapsing concentrator; and parabolic dish collector. (MHR)

Not Available

1980-01-01T23:59:59.000Z

288

SST-GATE: A dual mirror telescope for the Cherenkov Telescope Array  

E-Print Network [OSTI]

The Cherenkov Telescope Array (CTA) will be the world's first open observatory for very high energy gamma-rays. Around a hundred telescopes of different sizes will be used to detect the Cherenkov light that results from gamma-ray induced air showers in the atmosphere. Amongst them, a large number of Small Size Telescopes (SST), with a diameter of about 4 m, will assure an unprecedented coverage of the high energy end of the electromagnetic spectrum (above ~1TeV to beyond 100 TeV) and will open up a new window on the non-thermal sky. Several concepts for the SST design are currently being investigated with the aim of combining a large field of view (~9 degrees) with a good resolution of the shower images, as well as minimizing costs. These include a Davies-Cotton configuration with a Geiger-mode avalanche photodiode (GAPD) based camera, as pioneered by FACT, and a novel and as yet untested design based on the Schwarzschild-Couder configuration, which uses a secondary mirror to reduce the plate-scale and to all...

Zech, A; Blake, S; Boisson, C; Costille, C; De-Frondat, F; Dournaux, J -L; Dumas, D; Fasola, G; Greenshaw, T; Hervet, O; Huet, J -M; Laporte, P; Rulten, C; Savoie, D; Sayede, F; Schmoll, J

2013-01-01T23:59:59.000Z

289

Fusion reactor control study. Volume 3. Tandem mirror reactors. Final report  

SciTech Connect (OSTI)

A study of the control requirements of the Tandem Mirror Reactor concept is reported. The study describes the development of a control simulator that is based upon a spatially averaged physics code of the reactor concept. The simulator portrays the evolution of the plasma through the complete reactor operating cycle; it includes models of the control and measurement system, thus allowing the exploration of various strategies for reactor control. Startup, shutdown, and control during the quasi-steady-state power producing phase were explored. Configurations are described which use a variety of control effectors including modulation of the refueling rate, beam current, and electron cyclotron resonance heating. Multivariable design techniques were used to design the control laws and compensators for the feedback controllers and presume the practical measurement of only a subset of the plasma and machine variables. Performance of the various controllers is explored using the nonlinear control simulator. Derivative control strategies using new or developed sensors and effectors appropriate to a power reactor environment are postulated, based upon the results of the control configurations tested. Research and development requirements for these controls are delineated.

Chang, F.R.; DeCanio, F.; Fisher, J.L.; Madden, P.A.

1982-03-01T23:59:59.000Z

290

Rational reductions of the 2D-Toda hierarchy and mirror symmetry  

E-Print Network [OSTI]

We introduce and study a two-parameter family of symmetry reductions of the two-dimensional Toda lattice hierarchy, which are characterized by a rational factorization of the Lax operator into a product of an upper diagonal and the inverse of a lower diagonal formal difference operator. They subsume and generalize several classical 1 + 1 integrable hierarchies, such as the bigraded Toda hierarchy, the Ablowitz-Ladik hierarchy and E. Frenkel's q-deformed Gelfand-Dickey hierarchy. We establish their characterization in terms of block Toeplitz matrices for the associated factorization problem, and study their Hamiltonian structure. At the dispersionless level, we show how the Takasaki-Takebe classical limit gives rise to a family of non-conformal Frobenius manifolds with flat identity. We use this to generalize the relation of the Ablowitz-Ladik hierarchy to Gromov-Witten theory by proving an analogous mirror theorem for rational reductions: in particular, we show that the dual-type Frobenius manifolds we obtain are isomorphic to the equivariant quantum cohomology of a family of toric Calabi-Yau threefolds obtained from minimal resolutions of the local orbifold line.

Andrea Brini; Guido Carlet; Stefano Romano; Paolo Rossi

2014-04-14T23:59:59.000Z

291

Neutral Beam Injection Experiments and Related Behavior of Neutral Particles in the GAMMA 10 Tandem Mirror  

SciTech Connect (OSTI)

Results of neutral beam injection (NBI) experiments in the GAMMA 10 tandem mirror plasmas are presented together with the neutral particle behavior observed in the experiments. A hydrogen neural beam was injected into the hot-ion-mode plasmas by using the injector installed in the central-cell for the plasma heating and fueling. High-energy ions produced by NBI were observed and its energy distribution was measured for the first time with a neutral particle analyzer installed in the central-cell. The temporal and spatial behavior of hydrogen was observed with axially aligned H{sub {alpha}} detectors installed from the central midplane to anchor-cell. Enhancement of hydrogen recycling due to the beam injection and the cause of the observed decrease in plasma diamagnetism are discussed. The Monte-Carlo code DEGAS for neutral transport simulation was applied to the GAMMA 10 central-cell and a 3-dimensional simulation was performed in the NBI experiment. Localization of neutral particle during the beam injection is investigated based on the simulation and it was found that the increased recycling due to the beam injection was dominant near the injection port.

Nakashima, Y. [Plasma Research Center, University of Tsukuba (Japan); Watanabe, K. [Plasma Research Center, University of Tsukuba (Japan); Higashizono, Y. [Plasma Research Center, University of Tsukuba (Japan); Ohki, T. [Plasma Research Center, University of Tsukuba (Japan); Ogita, T. [Plasma Research Center, University of Tsukuba (Japan); Shoji, M. [National Institute for Fusion Science(Japan); Kobayashi, S. [Institute of Advanced Energy, Kyoto University (Japan); Islam, M.K. [Plasma Research Center, University of Tsukuba (Japan); Kubota, Y. [Plasma Research Center, University of Tsukuba (Japan); Yoshikawa, M. [Plasma Research Center, University of Tsukuba (Japan); Kobayashi, T. [Plasma Research Center, University of Tsukuba (Japan); Yamada, M. [Plasma Research Center, University of Tsukuba (Japan); Murakami, R. [Plasma Research Center, University of Tsukuba (Japan); Cho, T. [Plasma Research Center, University of Tsukuba (Japan)

2005-01-15T23:59:59.000Z

292

Design of a bridge bumper to protect bridge girders against collisions of overheight vehicles  

E-Print Network [OSTI]

Bridges with low clearance are vulnerable to collision with overheight vehicles. Collisions of overheight vehicles can cause fatalities and injuries to the drivers and passengers of the overheight vehicles, and damage to bridge girders. The repair...

Sharma, Hrishikesh

2009-05-15T23:59:59.000Z

293

fresher, more nutritious, and it simply tastes better. Like a bumper sticker I saw  

E-Print Network [OSTI]

colleges in every state, and the Homestead Act allowed settlers moving west to claim land as their own crops that sell at low government-subsidized prices. Low commodity prices require high-volume production utilize the dome's layout and maximize the growing

Baltisberger, Jay H.

294

Discover Jacksonville | Ultimate Jaguars | First Coast Fugitives | Internet Directory | Jax2Go Wireless Water's Edge magazine | H for Health magazine | Jax Air News | Mayport Mirror | Kings Bay Periscope | Ultimate Yellow Pages  

E-Print Network [OSTI]

Wireless Water's Edge magazine | H for Health magazine | Jax Air News | Mayport Mirror | Kings Bay Manatee County Port Authority Central Florida: Furniture Refinishers Sub- Contract Leathersmith

Richardson, Martin C.

295

Application of structural-mechanics methods to the design of large tandem-mirror fusion devices (MFTF-B)  

SciTech Connect (OSTI)

The Mirror Fusion Test Facility (MFTF-B) at Lawrence Livermore National Laboratory requires state-of-the-art structural-mechanics methods to deal with access constraints for plasma heating and diagnostics, alignment requirements, and load complexity and variety. Large interactive structures required an integrated analytical approach to achieve a reasonable level of overall system optimization. The Tandem Magnet Generator (TMG) creates a magnet configuration for the EFFI calculation of electromagnetic-field forces that, coupled with other loads, form the input loading to magnet and vessel finite-element models. The analytical results provide the data base for detailed design of magnet, vessel, foundation, and interaction effects.

Karpenko, V.N.; Ng, D.S.

1985-03-04T23:59:59.000Z

296

Two-stream cyclotron radiative instabilities due to the marginally mirror-trapped fraction for fustion alphas in tokamaks  

SciTech Connect (OSTI)

It is shown here that the marginally mirror-trapped fraction of the newly-born fusion alpha particles in the deuterium-tritium (DT) reaction dominated tokamak plasmas can induce a two-stream cyclotron radiative instability for the fast Alfven waves propagating near the harmonics of the alpha particle cyclotron frequency {omega}{sub c{alpha}}. This can explain both the experimentally observed time behavior and the spatially localized origin of the fusion product ion cyclotron emission (ICE) in TFTR at frequencies {omega} {approx} m{omega}{sub c{alpha}}.

Arunasalam, V.

1995-07-01T23:59:59.000Z

297

Strong light-matter coupling in bulk GaN-microcavities with double dielectric mirrors fabricated by two different methods  

SciTech Connect (OSTI)

Two routes for the fabrication of bulk GaN microcavities embedded between two dielectric mirrors are described, and the optical properties of the microcavities thus obtained are compared. In both cases, the GaN active layer is grown by molecular beam epitaxy on (111) Si, allowing use of selective etching to remove the substrate. In the first case, a three period Al{sub 0.2}Ga{sub 0.8}N/AlN Bragg mirror followed by a {lambda}/2 GaN cavity are grown directly on the Si. In the second case, a crack-free 2 {mu}m thick GaN layer is grown, and progressively thinned to a final thickness of {lambda}. Both devices work in the strong coupling regime at low temperature, as evidenced by angle-dependent reflectivity or transmission experiments. However, strong light-matter coupling in emission at room temperature is observed only for the second one. This is related to the poor optoelectronic quality of the active layer of the first device, due to its growth only 250 nm above the Si substrate and its related high defect density. The reflectivity spectra of the microcavities are well accounted for by using transfer matrix calculations.

Reveret, F.; Disseix, P.; Vasson, A.; Leymarie, J. [Clermont Universite, Universite Blaise Pascal, LASMEA, BP 10448, F-63000 Clermont-Ferrand (France); CNRS, UMR 6602, LASMEA, F-63177 Aubiere (France); Bejtka, K. [CRHEA-CNRS, Rue Bernard Gregory, Parc Sophia Antipolis, 06560 Valbonne (France); Department of Physics, SUPA, University of Strathclyde, Glasgow G4 0NG (United Kingdom); Edwards, P. R.; Martin, R. W. [Department of Physics, SUPA, University of Strathclyde, Glasgow G4 0NG (United Kingdom); Chenot, S.; Sellers, I. R.; Duboz, J. Y.; Leroux, M.; Semond, F. [CRHEA-CNRS, Rue Bernard Gregory, Parc Sophia Antipolis, 06560 Valbonne (France)

2010-08-15T23:59:59.000Z

298

VOLUME 76, NUMBER 1 P H Y S I C A L R E V I E W L E T T E R S 1 JANUARY 1996 First Study of Heavy-Ion Mirror Charge Exchange  

E-Print Network [OSTI]

are nuclear reaction studies with mirror nuclear pairs, since only one member of a mirror pair can be stable accessible excitation energy range. Charge-exchange p, n reactions at energies above 100 MeV have long been, since they involve the detection of rather low-energy neutrons. Furthermore, experiments in the b1

Bertulani, Carlos A. - Department of Physics and Astronomy, Texas A&M University

299

Flexible Optical Waveguide Film with 45degree micro-mirror couplers for hybrid E/O integration or parallel optical interconnection  

E-Print Network [OSTI]

**, Jerry Magera**, and Ray T. Chen University of Texas at Austin, LG Electronics Institute of Technology with typical rigid electronic board and free from geometrical constraint. The waveguide film with 45° mirror of electronic circuits, the construction of multi chip modules (MCM), which decrease the surface area

Chen, Ray

300

Metamaterial mirrors in optoelectronic devices Majid Esfandyarpour1, Erik C. Garnett1, Yi Cui1,2, Michael D. McGehee1 and Mark L. Brongersma1  

E-Print Network [OSTI]

Metamaterial mirrors in optoelectronic devices Majid Esfandyarpour1, Erik C. Garnett1, Yi Cui1 is highly undesirable in optoelectronic devices that use metal films as both electrical contacts and optical optoelectronic devices becomes obvious when an active semiconductor layer is placed in direct contact

Cui, Yi

Note: This page contains sample records for the topic "appendages mirrors bumpers" 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

Wildfire Policy in Transition: Where There's Smoke, There's .... Mirrors James E. Hubbard, State Forester, Colorado State Forest Service, Colorado State University,  

E-Print Network [OSTI]

Hubbard -1 Wildfire Policy in Transition: Where There's Smoke, There's .... Mirrors 3/26/03 James E-5060 Policy-making is a reflection of the public's perceived need for change. For much of the 20th century, wildfire policy in the United States was "all fires out by 10 A.M." This policy was instituted in 1935

302

Abstract--Grazing incidence metal mirrors in laser-driven IFE power plants are subject to a variety of threats that result  

E-Print Network [OSTI]

Abstract--Grazing incidence metal mirrors in laser-driven IFE power plants are subject to a variety [4] at UCSD, and help define design windows for the GIMM in a laser-driven IFE power plant of threats that result in damages leading to increased laser absorption, beam quality degradation and reduced

Tillack, Mark

303

1.22 {mu}m GaInNAs Saturable Absorber Mirrors with Tailored Recovery Time  

SciTech Connect (OSTI)

The effect of in-situ N-ion irradiation on the recombination dynamics of GaInNAs/GaAs semiconductor saturable absorber mirrors has been studied. The samples were fabricated by molecular beam epitaxy using a radio frequency plasma source for nitrogen incorporation in the absorber layers as well as for the irradiation. The recombination dynamics of irradiated samples were studied by pump-probe measurements. The recombination time of the absorbers could be reduced by increasing the irradiation time. The effect of the reduced recombination time on the pulse dynamics of a mode-locked laser setup was studied with a Bi-doped fibre laser. The pulse quality was found to improve with increased irradiation time and reduced recombination time, demonstrating the potential of the in-situ irradiation method for device applications.

Puustinen, Janne; Guina, Mircea; Korpijaervi, Ville-Markus; Tukiainen, Antti; Kivistoe, Samuli; Pessa, Markus [Optoelectronics Research Centre, Tampere University of Technology, P.O. Box 692, FIN-33101 Tampere (Finland); Marcinkevicius, Saulius [Royal Institute of Technology, Electrum 229, 16440, Kista (Sweden)

2010-11-10T23:59:59.000Z

304

Development of polarization-controlled multi-pass Thomson scattering system in the GAMMA 10 tandem mirror  

SciTech Connect (OSTI)

In the GAMMA 10 tandem mirror, the typical electron density is comparable to that of the peripheral plasma of torus-type fusion devices. Therefore, an effective method to increase Thomson scattering (TS) signals is required in order to improve signal quality. In GAMMA 10, the yttrium-aluminum-garnet (YAG)-TS system comprises a laser, incident optics, light collection optics, signal detection electronics, and a data recording system. We have been developing a multi-pass TS method for a polarization-based system based on the GAMMA 10 YAG TS. To evaluate the effectiveness of the polarization-based configuration, the multi-pass system was installed in the GAMMA 10 YAG-TS system, which is capable of double-pass scattering. We carried out a Rayleigh scattering experiment and applied this double-pass scattering system to the GAMMA 10 plasma. The integrated scattering signal was made about twice as large by the double-pass system.

Yoshikawa, M.; Morimoto, M.; Shima, Y.; Kohagura, J.; Sakamoto, M.; Nakashima, Y.; Imai, T. [Plasma Research Center, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8577 (Japan); Yasuhara, R.; Yamada, I.; Kawahata, K.; Funaba, H. [National Institute for Fusion Science, 322-6 Oroshi-cho, Toki, Gifu 509-5292 (Japan); Minami, T. [Institute of Advanced Energy, Kyoto University, Gokasho, Uji, Kyoto 611-0011 (Japan)

2012-10-15T23:59:59.000Z

305

Manufacture of and Apparatus for Nearly Frictionless Operation of a Rotatable Array of Micro-Mirrors in a Solar Concentrator Sheet  

E-Print Network [OSTI]

Due to an ever growing shortage of conventional energy sources, there is an increasingly intense interest in harnessing solar energy. The instant invention can contribute to the goal of achieving environmentally clean solar energy to be competitive with conventional energy sources. A novel method is described for manufacturing a transparent sheet with an embedded array of mirrored spheroidal micro-balls for use in a solar energy concentrator, and analogous applications such as optical switches and solar rocket assist. The micro-balls are covered with a thin spherical shell of lubricating liquid so that they are free to rotate in an almost frictionless encapsulation in the sheet. Novel method and apparatus are presented for producing the preferred embodiment of a close-packed monolayer of the array of mirrored micro-balls.

Rabinowitz, M; Overhauser, David V.; Rabinowitz, Mario

2006-01-01T23:59:59.000Z

306

Manufacture of and Apparatus for Nearly Frictionless Operation of a Rotatable Array of Micro-Mirrors in a Solar Concentrator Sheet  

E-Print Network [OSTI]

Due to an ever growing shortage of conventional energy sources, there is an increasingly intense interest in harnessing solar energy. The instant invention can contribute to the goal of achieving environmentally clean solar energy to be competitive with conventional energy sources. A novel method is described for manufacturing a transparent sheet with an embedded array of mirrored spheroidal micro-balls for use in a solar energy concentrator, and analogous applications such as optical switches and solar rocket assist. The micro-balls are covered with a thin spherical shell of lubricating liquid so that they are free to rotate in an almost frictionless encapsulation in the sheet. Novel method and apparatus are presented for producing the preferred embodiment of a close-packed monolayer of the array of mirrored micro-balls.

Mario Rabinowitz; David V. Overhauser

2006-01-28T23:59:59.000Z

307

THE NEED FOR A PARADIGM SHIFT IN OPTICAL ASTRONOMY: A SOLUTION GIVEN BY LIQUID MIRRORS AND EXAMPLES OF THEIR APPLICATIONS TO COSMOLOGY  

E-Print Network [OSTI]

I argue that there is a crisis in optical Astronomy due to a paucity of telescopes and thus the need for a paradigm shift in telescope technology. Large increases in collecting areas and observing time/astronomer are only possible if we forgo the fully steerable multipurpose telescope with a glass primary mirror that has dominated astronomical research. Only by adopting entirely novel technologies that allow one to build large and inexpensive telescopes can we achieve truly large improvements. This may come at the expense of versatility and may entail changes in the observing strategies astronomers are now accustomed to. I build my case around a new technology, liquid mirrors, that although in its infancy has achieved credibility. I argue that forthcoming technological improvements will make Liquid Mirror Telescopes (LMTs) nearly as versatile as conventional telescopes. I address the issue of the fields accessible to LMTs equipped with novel optical correctors. Optical design work and exploratory laboratory work indicate that a single LMT should be able to access, with excellent images, subregions anywhere inside fields as large as 45 degrees. As a practical example of what an LMT can do with the present technology, I examine the expected performance of a 5-m liquid mirror telescope, presently under construction, dedicated to a cosmological survey. It is rather impressive, due to the fact that the instrument works full-time on a four-year survey: Spectrophotometry reaches B=24 with a signal to noise ratio of 10 within a 200\\AA bandpass for all objects within 300 square degrees and wide-band photometry reaches about B=27. I give three examples of cosmological projects that can be done with the data.

E. F. Borra

1995-03-03T23:59:59.000Z

308

EUV reflectance characterization of the 94/304 ? flight secondary AIA mirror at beamline 6.3.2 of the Advanced Light Source  

SciTech Connect (OSTI)

The AIA secondary flight mirror, previously coated at Columbia University with Mg/SiC for the 303.8 {angstrom} channel and Mo/Y for the 93.9 {angstrom} channel was characterized by means of EUV reflectance measurements at beamline 6.3.2 of the Advanced Light Source (ALS) synchrotron at LBNL on January 10, 2006. Paul Boerner (LMSAL) also participated in these measurements.

Soufli, R; Spiller, E; Aquila, A L; Gullikson, E M; Windt, D L

2006-02-22T23:59:59.000Z

309

Tuning extreme ultraviolet emission for optimum coupling with multilayer mirrors for future lithography through control of ionic charge states  

SciTech Connect (OSTI)

We report on the identification of the optimum plasma conditions for a laser-produced plasma source for efficient coupling with multilayer mirrors at 6.x nm for beyond extreme ultraviolet lithography. A small shift to lower energies of the peak emission for Nd:YAG laser-produced gadolinium plasmas was observed with increasing laser power density. Charge-defined emission spectra were observed in electron beam ion trap (EBIT) studies and the charge states responsible identified by use of the flexible atomic code (FAC). The EBIT spectra displayed a larger systematic shift of the peak wavelength of intense emission at 6.x nm to longer wavelengths with increasing ionic charge. This combination of spectra enabled the key ion stage to be confirmed as Gd{sup 18+}, over a range of laser power densities, with contributions from Gd{sup 17+} and Gd{sup 19+} responsible for the slight shift to longer wavelengths in the laser-plasma spectra. The FAC calculation also identified the origin of observed out-of-band emission and the charge states responsible.

Ohashi, Hayato, E-mail: ohashi@cc.utsunomiya-u.ac.jp; Higashiguchi, Takeshi, E-mail: higashi@cc.utsunomiya-u.ac.jp; Suzuki, Yuhei; Kawasaki, Masato [Department of Advanced Interdisciplinary Sciences, Center for Optical Research and Education (CORE), Utsunomiya University, Yoto 7-1-2, Utsunomiya, Tochigi 321-8585 (Japan); Li, Bowen; Dunne, Padraig; O'Sullivan, Gerry [School of Physics, University College Dublin, Belfield, Dublin 4 (Ireland); Kanehara, Tatsuhiko; Aida, Yuya; Nakamura, Nobuyuki [Institute for Laser Science, The University of Electro-Communications, Chofu, Tokyo 182-8585 (Japan); Torii, Shuichi; Makimura, Tetsuya [Institute of Applied Physics, University of Tsukuba, Tsukuba, Ibaraki 305-8573 (Japan); Jiang, Weihua [Department of Electrical Engineering, Nagaoka University of Technology, Kami-tomiokamachi 1603-1, Nagaoka, Niigata 940-2188 (Japan)

2014-01-21T23:59:59.000Z

310

July 2010 Issue 26 Welcome to the Summer issue of the Newsletter -this ones turned into a bumper  

E-Print Network [OSTI]

. There were new faces, as the walk evidently appealed to some who sensibly preferred pavements to muddy fields wind, leaving Tudor buildings either side of its course largely untouched. Rapidly passing the 1960s

Davies, Christopher

311

Measurement of the half-life of the T=$\\frac{1}{2}$ mirror decay of $^{19}$Ne and its implication on physics beyond the standard model  

E-Print Network [OSTI]

The $\\frac{1}{2}^+ \\rightarrow \\frac{1}{2}^+$ superallowed mixed mirror decay of $^{19}$Ne to $^{19}$F is excellently suited for high precision studies of the weak interaction. However, there is some disagreement on the value of the half-life. In a new measurement we have determined this quantity to be $T_{1/2}$ = $17.2832 \\pm 0.0051_{(stat)}$ $\\pm 0.0066_{(sys)}$ s, which differs from the previous world average by 3 standard deviations. The impact of this measurement on limits for physics beyond the standard model such as the presence of tensor currents is discussed.

L. J. Broussard; H. O. Back; M. S. Boswell; A. S. Crowell; P. Dendooven; G. S. Giri; C. R. Howell; M. F. Kidd; K. Jungmann; W. L. Kruithof; A. Mol; C. J. G. Onderwater; R. W. Pattie Jr.; P. D. Shidling; M. Sohani; D. J. van der Hoek; A. Rogachevskiy; E. Traykov; O. O. Versolato; L. Willmann; H. W. Wilschut; A. R. Young

2014-05-28T23:59:59.000Z

312

Application of structural-mechanics methods to the design of large tandem-mirror fusion devices (MFTF-B). Revision 1  

SciTech Connect (OSTI)

The Mirror Fusion Test Facility (MFTF-B) at Lawrence Livermore National Laboratory requires state-of-the-art structural-mechanics methods to deal with access constraints for plasma heating and diagnostics, alignment requirements, and load complexity and variety. Large interactive structures required an integrated analytical approach to achieve a reasonable level of overall system optimization. The Tandem Magnet Generator (TMG) creates a magnet configuration for the EFFI calculation of electromagnetic-field forces that, coupled with other loads, form the input loading to magnet and vessel finite-element models. The analytical results provide the data base for detailed design of magnet, vessel, foundation, and interaction effects. 13 refs.

Karpenko, V.N.; Ng, D.S.

1985-08-15T23:59:59.000Z

313

Laboratory-size three-dimensional x-ray microscope with Wolter type I mirror optics and an electron-impact water window x-ray source  

SciTech Connect (OSTI)

We constructed a laboratory-size three-dimensional water window x-ray microscope that combines wide-field transmission x-ray microscopy with tomographic reconstruction techniques, and observed bio-medical samples to evaluate its applicability to life science research fields. It consists of a condenser and an objective grazing incidence Wolter type I mirror, an electron-impact type oxygen K? x-ray source, and a back-illuminated CCD for x-ray imaging. A spatial resolution limit of around 1.0 line pairs per micrometer was obtained for two-dimensional transmission images, and 1-?m scale three-dimensional fine structures were resolved.

Ohsuka, Shinji, E-mail: ohsuka@crl.hpk.co.jp [Hamamatsu Photonics K.K., 5000 Hirakuchi, Hamakita-ku, Hamamatsu-City, 434-8601 (Japan); The Graduate School for the Creation of New Photonics Industries, 1955-1 Kurematsu-cho, Nishi-ku, Hamamatsu-City, 431-1202 (Japan); Ohba, Akira; Onoda, Shinobu; Nakamoto, Katsuhiro [Hamamatsu Photonics K.K., 5000 Hirakuchi, Hamakita-ku, Hamamatsu-City, 434-8601 (Japan); Nakano, Tomoyasu [Hamamatsu Photonics K.K., 5000 Hirakuchi, Hamakita-ku, Hamamatsu-City, 434-8601 (Japan); Ray-Focus Co. Ltd., 6009 Shinpara, Hamakita-ku, Hamamatsu-City, 434-0003 (Japan); Miyoshi, Motosuke; Soda, Keita; Hamakubo, Takao [Research Center for Advanced Science and Technology, The University of Tokyo, 4-6-1 Komaba, Meguro-ku, Tokyo 153-8904 (Japan)

2014-09-15T23:59:59.000Z

314

Soft x-ray intensity profile measurements of electron cyclotron heated plasmas using semiconductor detector arrays in GAMMA 10 tandem mirror  

SciTech Connect (OSTI)

Temporally and spatially resolved soft x-ray analyses of electron cyclotron heated plasmas are carried out by using semiconductor detector arrays in the GAMMA 10 tandem mirror. The detector array has 16-channel for the measurements of plasma x-ray profiles so as to make x-ray tomographic reconstructions. The characteristics of the detector array make it possible to obtain spatially resolved plasma electron temperatures down to a few tens eV and investigate various magnetohydrodynamic activities. High power electron cyclotron heating experiment for the central-cell region in GAMMA 10 has been started in order to reduce the electron drag by increasing the electron temperature.

Minami, R., E-mail: minami@prc.tsukuba.ac.jp; Imai, T.; Kariya, T.; Numakura, T.; Eguchi, T.; Kawarasaki, R.; Nakazawa, K.; Kato, T.; Sato, F.; Nanzai, H.; Uehara, M.; Endo, Y.; Ichimura, M. [Plasma Research Center, University of Tsukuba, Tsukuba, Ibaraki 305-8577 (Japan)

2014-11-15T23:59:59.000Z

315

House of Mirrored Faces  

E-Print Network [OSTI]

Ce"ary * P*"?teCt mySe,f a9a1nst *?? onslaught of to m&JSSSl Tre'alVZan fiJlS'thS/T^STS 27*7 1n0rd1nate OTOUnt ?f t^"* y*.t deal of light on^/o^-ac^S^^^aJf^rvVnt '^o^-he^s^eclls* ISt^ -11- I can still feel her anger, simmering slowly now like a neglected... T'Pau and were promised in the ancient way. Or so it appeared. When he touched me, he did not touch my mind, and when I confided this to Amanda, she only smiled her secretive smile and said, "Wait; it will come. It was the same for me. You have...

Carraher, Lynda

1980-01-01T23:59:59.000Z

316

Gamma Bang Time/Reaction History Diagnostics for the National Ignition Facility (NIF) Using 90-degree Off-axis Parabolic Mirrors  

SciTech Connect (OSTI)

Gas Cherenkov detectors (GCD) have been used to convert fusion gamma into photons to achieve gamma bang time (GBT) and reaction history measurements. The GCD designed for Omega used Cassegrain reflector optics in order to fit inside a ten-inch manipulator. A novel design for the National Ignition Facility (NIF) using 90º Off-Axis Parabolic (OAP) mirrors will increase light collection efficiency from fusion gammas and achieve minimum time dispersion. The broadband Cherenkov light (from 200 to 800 nm) is relayed into a high-speed detector using three parabolic mirrors. Because light is collected from many source planes throughout the CO2 gas volume, the detector is positioned at the stop position rather than an image position. The stop diameter and its position are independent of the light-generation location along the gas cell. The current design collects light from a 100-mm diameter by 500-mm-long gas volume. Optical ray tracings demonstrate how light can be collected from different angled trajectories of the Compton electrons as they fly through the CO2 gas volume. A cluster of four channels will allow for increased dynamic range as well as different gamma energy threshold sensitivities. 52.70.La, 29.40.Ka, 42.15.Eq, 07.60.-j, 07.85.-m

H.W. Herrmann, R.M. Malone, W. Stoeffl, J.M. Mack, C.S. Young

2008-06-01T23:59:59.000Z

317

In Proc. SPIE 4013-55, UV, Optical, and IR Space Telescopes and Instruments VI, Breckinridge & Jacobsen, eds., Munich, Germany, March 2000. Resolving Piston Ambiguities when Phasing a Segmented Mirror  

E-Print Network [OSTI]

& Jacobsen, eds., Munich, Germany, March 2000. Resolving Piston Ambiguities when Phasing a Segmented Mirror light is insensitive to segment piston errors that are a whole number of waves. If the wavefront sensing range of a wavefront sensor can be extended from on the order of ¢¡¤£ 2 in piston to several waves

Löfdahl, Mats

318

Optical Characterization ofMEMS Deformable Mirror Array Structures Soe-Mie F. Nee*a, Lewis F. DeSandrea, Thomas Bifano**b, Linda F. johnsona and Mark B. Morana  

E-Print Network [OSTI]

Sandrea, Thomas Bifano**b, Linda F. johnsona and Mark B. Morana aResearch Department, Naval Air Warfare Center. The mirror arrays are micro-electronic-mechanical system (MEMS) devices which were fabricated by Boston and electronic elements were fabricated through conventional surface micro-machining using polycrystalline

319

Thermo-mechanical analysis of ITER first mirrors and its use for the ITER equatorial visible/infrared wide angle viewing system optical design  

SciTech Connect (OSTI)

ITER first mirrors (FMs), as the first components of most ITER optical diagnostics, will be exposed to high plasma radiation flux and neutron load. To reduce the FMs heating and optical surface deformation induced during ITER operation, the use of relevant materials and cooling system are foreseen. The calculations led on different materials and FMs designs and geometries (100 mm and 200 mm) show that the use of CuCrZr and TZM, and a complex integrated cooling system can limit efficiently the FMs heating and reduce their optical surface deformation under plasma radiation flux and neutron load. These investigations were used to evaluate, for the ITER equatorial port visible/infrared wide angle viewing system, the impact of the FMs properties change during operation on the instrument main optical performances. The results obtained are presented and discussed.

Joanny, M.; Salasca, S.; Dapena, M.; Cantone, B.; Travere, J. M. [CEA, IRFM, F-13108 Saint-Paul-lez-Durance (France); Thellier, C.; Ferme, J. J. [THALES SESO, 13593 Aix-en-Provence Cedex 3 (France); Marot, L. [Department of Physics, University of Basel, 4056 Basel (Switzerland); Buravand, O. [Institut d'Optique Graduate School, 91127 Palaiseau (France); Perrollaz, G. [AMETRA, 13770 Venelles (France); Zeile, C. [INR, KIT, D-76344 Eggenstein-Leopoldshafen (Germany)

2012-10-15T23:59:59.000Z

320

Top-emission Si-based phosphor organic light emitting diode with Au doped ultrathin n-Si film anode and bottom Al mirror  

SciTech Connect (OSTI)

We report a highly efficient top-emission Si-based phosphor organic light emitting diode (PhOLED) with an ultrathin polycrystalline n-Si:Au film anode and a bottom Al mirror. This anode is formed by magnetron sputtering followed by Ni induced crystallization and then Au diffusion. By optimizing the thickness of the n-Si:Au film anode, the Au diffusion temperature, and the other parameters of the PhOLED, the highest current and power efficiencies of the n-Si:Au film anode PhOLED reached 85{+-}9 cd/A and 80{+-}8 lm/W, respectively, corresponding to an external quantum efficiency of 21{+-}2% and a power conversion efficiency of 15{+-}2%, respectively, which are about 60% and 110% higher than those of the indium tin oxide anode counterpart and 70% and 50% higher than those of the bulk n{sup +}-Si:Au anode counterpart, respectively.

Li, Y. Z.; Xu, W. J.; Ran, G. Z. [State Key Laboratory for Mesoscopic Physics, School of Physics, Peking University, Beijing 100871 (China); Qin, G. G. [State Key Laboratory for Mesoscopic Physics, School of Physics, Peking University, Beijing 100871 (China); Key Lab of Semiconductor Materials, CAS, Beijing 100083 (China)

2009-07-20T23:59:59.000Z

Note: This page contains sample records for the topic "appendages mirrors bumpers" 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

SUPERGLASS. Engineering field tests - Phase 3. Production, market planning, and product evaluation for a high-thermal-performance insulating glass design utilizing HEAT MIRROR transparent insulation. Final report  

SciTech Connect (OSTI)

HEAT MIRROR transparent window insulation consists of a clear polyester film two mils (.002'') thick with a thin, clear low-emissivity (.15) coating deposited on one side by state-of-the-art vacuum deposition processes. This neutral-colored invisible coating reflects long-wave infrared energy (heat). When mounted by being stretched with a 1/2'' air-gap on each side of the film, the resulting unit reduces heat loss by 60% compared to dual insulating glass. Southwall Corporation produces HEAT MIRROR transparent insulation and markets it to manufacturers of sealed insulating glass (I.G.) units and window and building manufacturers who make their own I.G. These companies build and sell the SUPERGLASS sealed glazing units. Units made and installed in buildings by six customers were visited. These units were located in many geographic regions, including the Pacific Northwest, Rocky Mountains, New England, Southeast, and West Coast. As much as could be obtained of their history was recorded, as was their current condition and performance. These units had been in place from two weeks to over a year. All of the units were performing thermally very well, as measured by taking temperature profiles through them and through adjacent conventional I.G. units. Some units had minor visual defects (attributed to I.G. assembly techniques) which are discussed in detail. Overall occupant acceptance was enthusiastically positive. In addition to saving energy, without compromise of optical quality or appearance, the product makes rooms with large glazing areas comfortable to be in in cold weather. All defects observed were present when built; there appears to be no in-field degradation of quality at this time.

Tilford, C L

1982-11-01T23:59:59.000Z

322

Roll stabilization for fast monohulls by using passive and active lifting appendages  

E-Print Network [OSTI]

Roll stabilization for monohulls is an important issue in naval architecture. Several methods including roll stabilization tanks, active control fins, rudder roll stabilization systems, and bilge keels are commonly used ...

Ulusoy, Talha

2004-01-01T23:59:59.000Z

323

E-Print Network 3.0 - appendages diagnostico por Sample Search...  

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

Monografias em Cincia da Computao Summary: : 0103-9741 Editor: Prof. Carlos Jose Pereira de Lucena Dezembro, 2008 Diagnostico de Falhas e Localiza... computacionais tem...

324

E-Print Network 3.0 - atrial appendage thrombus Sample Search...  

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

persistent atrial... the separation of the atrial activity by the ventricular one in the ECG recordings (1-minute, two leads, 128 Hz Source: Tollis, Ioannis G. "Yanni" - Institute...

325

E-Print Network 3.0 - atrial appendage function Sample Search...  

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

and Medicine 10 DICTIONARY LEARNING FOR THE SPARSE MODELLING OF ATRIAL FIBRILLATION IN ECG SIGNALS Summary: DICTIONARY LEARNING FOR THE SPARSE MODELLING OF ATRIAL FIBRILLATION IN...

326

New insights on boundary plasma turbulence and the quasi-coherent mode in Alcator C-Mod using a Mirror Langmuir Probe  

SciTech Connect (OSTI)

A new “Mirror Langmuir Probe” diagnostic, combined with a double-coil scanning magnetic probe, is used to interrogate Alcator C-Mod's quasi-coherent mode (QCM) with unprecedented detail. In ohmic EDA H-modes, the QCM is found to reside in a region of positive radial electric field, with a radial width (?3?mm) that spans open and closed field line regions. Large amplitude, in-phase sinusoidal bursts (?100?kHz) in density, electron temperature, and plasma potential are observed, with potential lagging density by ?16°, producing an outward radial transport velocity of ?10?m/s. Mode propagation corresponds to the sum of local E × B and electron diamagnetic drift velocities. Poloidal magnetic field fluctuations project to current filaments carrying peak current densities of ?25 A/cm{sup 2}. An evaluation of parallel electron force balance (Ohm's law) over a fluctuation cycle indicates a significant electromotive component. Interchange drive is also a contributor in the current continuity (vorticity) equation. Thus, the QCM is primarily a separatrix-spanning electron drift-wave with interchange and electromagnetic contributions.

LaBombard, B.; Golfinopoulos, T.; Terry, J. L.; Brunner, D.; Davis, E.; Greenwald, M.; Hughes, J. W. [MIT Plasma Science and Fusion Center, Cambridge, Massachusetts 02139 (United States)] [MIT Plasma Science and Fusion Center, Cambridge, Massachusetts 02139 (United States)

2014-05-15T23:59:59.000Z

327

Survey mirrors and lenses and their required surface accuracy. Volume 1. Technical report. Final report for September 15, 1978-December 1, 1979  

SciTech Connect (OSTI)

An investigation of the optical performance of a variety of concentrating solar collectors is reported. The study addresses two important issues: the accuracy of reflective or refractive surfaces required to achieve specified performance goals, and the effect of environmental exposure on the performance concentrators. To assess the importance of surface accuracy on optical performance, 11 tracking and nontracking concentrator designs were selected for detailed evaluation. Mathematical models were developed for each design and incorporated into a Monte Carlo ray trace computer program to carry out detailed calculations. Results for the 11 concentrators are presented in graphic form. The models and computer program are provided along with a user's manual. A survey data base was established on the effect of environmental exposure on the optical degradation of mirrors and lenses. Information on environmental and maintenance effects was found to be insufficient to permit specific recommendations for operating and maintenance procedures, but the available information is compiled and reported and does contain procedures that other workers have found useful.

Not Available

1980-01-01T23:59:59.000Z

328

Low Cost, Stable Switchable Mirrors: Lithium Ion Mirrors with Improved  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr MayAtmospheric Optical Depth7-1D: VegetationEquipment Surfaces and InterfacesAdministration - Rocky MountainPrepared: 10/28/09Stability

329

Fiber bundle phase conjugate mirror  

DOE Patents [OSTI]

An improved method and apparatus for passively conjugating the phases of a distorted wavefronts resulting from optical phase mismatch between elements of a fiber laser array are disclosed. A method for passively conjugating a distorted wavefront comprises the steps of: multiplexing a plurality of probe fibers and a bundle pump fiber in a fiber bundle array; passing the multiplexed output from the fiber bundle array through a collimating lens and into one portion of a non-linear medium; passing the output from a pump collection fiber through a focusing lens and into another portion of the non-linear medium so that the output from the pump collection fiber mixes with the multiplexed output from the fiber bundle; adjusting one or more degrees of freedom of one or more of the fiber bundle array, the collimating lens, the focusing lens, the non-linear medium, or the pump collection fiber to produce a standing wave in the non-linear medium.

Ward, Benjamin G.

2012-05-01T23:59:59.000Z

330

Mirrors of Mind and Flesh  

E-Print Network [OSTI]

. His mouth tasting it. Only the faintest echo of fear, fired over with passion. Spark and cinder of anger. Sweet salt musk of desire. How often had he caught that musk on Jim, when some woman had aroused him? Now it went straight through him, there... himself grasping Spock's hand, kissing it fiercely, pressing his face to its warmth, it's strength. "I don't want to lose you, A confession, a plea, a command. he whispered. "Jim. comforting. Spock murmured softly, Kirk's head raised suddenly...

Feyrer, G.

1979-01-01T23:59:59.000Z

331

Mirror Lake OlentangyRiver  

E-Print Network [OSTI]

West Park Jesse Owens North Recreation Center (JON) Ice Rink Jesse Owens South Recreation Center (JOS Recreation Center (JON) Ice Rink Jesse Owens South Recreation Center (JOS) Lincoln Tower Park Women's Field) Lincoln Tower Park Women's Field House North Beach Volleyball Courts North Beach Roller Hockey Rink

Jones, Michelle

332

The Crack in the Mirror  

E-Print Network [OSTI]

, pressed five of the carvings in a specific order and slid one side open, then, having flicked a switch, he closed it again and left it sitting on his desk, an apparent ornament, confident that the small electronic scrambler would ensure thn t he... laid it on the small table beside his bed, His unpacking complete, Kirk moved to sit at the desk, still empty apart from his scrambler, and considered what he had learned already. One sure assumption if an assumption could be said to be Sure...

Clark, Sheila

1994-01-01T23:59:59.000Z

333

Sandia National Laboratories: magnetic mirror  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr MayAtmosphericNuclear Security Administration the1developmentturbine blade

334

Sandia National Laboratories: Solar Mirrors  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May JunDatastreamsmmcrcalgovInstrumentsrucLas ConchasPassiveSubmitted for US PatentOperationalfor Download

335

3/11/13 9:17 AMResearcher says interest in zombies waxes, wanes to mirror societal dissatisfaction -The Washington Post Page 1 of 5http://www.washingtonpost.com/entertainment/tv/researcher-says-inte...faction/2013/03/11/8a5d0472-8a2e-11e2-a88e-461ffa2e34e  

E-Print Network [OSTI]

- The Washington Post Page 1 of 5http://www.washingtonpost.com/entertainment/tv/researcher-says-inte...faction/2013 to mirror societal dissatisfaction - The Washington Post Page 2 of 5http://www.washingtonpost.com/entertainment/tv/researcher-says-inte...faction

Duchowski, Andrew T.

336

Sub-250?nm low-threshold deep-ultraviolet AlGaN-based heterostructure laser employing HfO{sub 2}/SiO{sub 2} dielectric mirrors  

SciTech Connect (OSTI)

We report a sub-250-nm, optically pumped, deep-ultraviolet laser using an Al{sub x}Ga{sub 1?x}N-based multi-quantum-well structure grown on a bulk Al-polar c-plane AlN substrate. TE-polarization-dominant lasing action was observed at room temperature with a threshold pumping power density of 250?kW/cm{sup 2}. After employing high-reflectivity SiO{sub 2}/HfO{sub 2} dielectric mirrors on both facets, the threshold pumping power density was further reduced to 180?kW/cm{sup 2}. The internal loss and threshold modal gain can be calculated as 2?cm{sup ?1} and 10.9?cm{sup ?1}, respectively.

Kao, Tsung-Ting; Liu, Yuh-Shiuan; Mahbub Satter, Md.; Li, Xiao-Hang; Lochner, Zachary; Douglas Yoder, P.; Detchprohm, Theeradetch; Dupuis, Russell D.; Shen, Shyh-Chiang, E-mail: shyh.shen@ece.gatech.edu; Ryou, Jae-Hyun [School of Electrical and Computer Engineering, Georgia Institute of Technology, 777 Atlantic Dr. NW, Atlanta, Georgia 30332-0250 (United States)] [School of Electrical and Computer Engineering, Georgia Institute of Technology, 777 Atlantic Dr. NW, Atlanta, Georgia 30332-0250 (United States); Fischer, Alec M.; Wei, Yong; Xie, Hongen; Ponce, Fernando A. [Department of Physics, Arizona State University, Tempe, Arizona 85287-1504 (United States)] [Department of Physics, Arizona State University, Tempe, Arizona 85287-1504 (United States)

2013-11-18T23:59:59.000Z

337

Telescopes in the mirror of scientometrics  

E-Print Network [OSTI]

Journal ApJS Aust J. Ph. PRL Nature Science ApJ AJ PASPApJ ApJ ApJ ApJ ApJ Aust. JP PRL ApJ Science Nature NatureApJ Science ApJ ApJ Nature PRL Ann d’Ap PRL First author

Trimble, Virginia

2009-01-01T23:59:59.000Z

338

Mirrored serpentine flow channels for fuel cell  

DOE Patents [OSTI]

A PEM fuel cell having serpentine flow field channels wherein the input/inlet legs of each channel border the input/inlet legs of the next adjacent channels in the same flow field, and the output/exit legs of each channel border the output/exit legs of the next adjacent channels in the same flow field. The serpentine fuel flow channels may be longer, and may contain more medial legs, than the serpentine oxidant flow channels.

Rock, Jeffrey Allan (Rochester, NY)

2000-08-08T23:59:59.000Z

339

Figure and finish of grazing incidence mirrors  

SciTech Connect (OSTI)

Great improvement has been made in the past several years in the quality of optical components used in synchrotron radiation (SR) beamlines. Most of this progress has been the result of vastly improved metrology techniques and instrumentation permitting rapid and accurate measurement of the surface finish and figure on grazing incidence optics. A significant theoretical effort has linked the actual performance of components used as x-ray wavelengths to their topological properties as measured by surface profiling instruments. Next-generation advanced light sources will require optical components and systems to have sub-arc second surface figure tolerances. This paper will explore the consequences of these requirements in terms of manufacturing tolerances to see if the present manufacturing state-of-the-art is capable of producing the required surfaces. 15 refs., 14 figs., 2 tabs.

Takacs, P.Z. (Brookhaven National Lab., Upton, NY (USA)); Church, E.L. (Picatinny Arsenal, Dover, NJ (USA). Army Armament Research, Development and Engineering Center)

1989-08-01T23:59:59.000Z

340

POLYMERIC MIRROR FILMS: DURABILITY IMPROVEMENT AND IMPLEMENTATION...  

Office of Environmental Management (EM)

eviewmeeting042413chen.pdf More Documents & Publications ADVANCED REFLECTIVE FILMS AND PANELS FOR NEXT GENERATION SOLAR COLLECTORS Development of an Advanced, Low-Cost parabolic...

Note: This page contains sample records for the topic "appendages mirrors bumpers" 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

Chilled Mirror Dew Point Hygrometer (CM) Handbook  

SciTech Connect (OSTI)

The CM systems have been developed for the ARM Program to act as a moisture standard traceable to National Institute of Standards and Technology (NIST). There are three CM systems that are each fully portable, self-contained, and require only 110 V AC power. The systems include a CM sensor, air sampling and filtration system, a secondary reference (Rotronic HP043 temperature and relative humidity sensor) to detect system malfunctions, a data acquisition system, and data storage for more than one month of 1-minute data. The CM sensor directly measures dew point temperature at 1 m, air temperature at 2 m, and relative humidity at 2 m. These measurements are intended to represent self-standing data streams that can be used independently or in combinations.

Ritsche, MT

2005-01-01T23:59:59.000Z

342

The white wall, a gravitational mirror  

E-Print Network [OSTI]

We describe the exact solution of Einstein's equation corresponding to a static homogenous distribution of matter with plane symmetry lying below $z=0$. We study the geodesics in it and we show that this simple spacetime exhibits very curious properties. In particular, it has a repelling singular boundary and all geodesics bounce off it.

Ricardo E. Gamboa Saravi

2008-11-11T23:59:59.000Z

343

Thermophotovoltaic in-situ mirror cell  

DOE Patents [OSTI]

A photovoltaic cell used in a direct energy conversion generator for converting heat to electricity includes a reflective layer disposed within the cell between the active layers of the cell and the cell substrate. The reflective layer reflects photons of low energy back to a photon producing emitter for reabsorption by the emitter, or reflects photons with energy greater than the cell bandgap back to the cell active layers for conversion into electricity. The reflective layer can comprise a reflective metal such as gold while the substrate can comprise heavily doped silicon or a metal.

Campbell, Brian C. (Scotia, NY)

1997-01-01T23:59:59.000Z

344

Automated interferometric alignment system for paraboloidal mirrors  

DOE Patents [OSTI]

A method is described for a systematic method of interpreting interference fringes obtained by using a corner cube retroreflector as an alignment aid when aigning a paraboloid to a spherical wavefront. This is applicable to any general case where such alignment is required, but is specifically applicable in the case of aligning an autocollimating test using a diverging beam wavefront. In addition, the method provides information which can be systematically interpreted such that independent information about pitch, yaw and focus errors can be obtained. Thus, the system lends itself readily to automation. Finally, although the method is developed specifically for paraboloids, it can be seen to be applicable to a variety of other aspheric optics when applied in combination with a wavefront corrector that produces a wavefront which, when reflected from the correctly aligned aspheric surface will produce a collimated wavefront like that obtained from the paraboloid when it is correctly aligned to a spherical wavefront.

Maxey, L. Curtis (Powell, TN)

1993-01-01T23:59:59.000Z

345

Automated interferometric alignment system for paraboloidal mirrors  

DOE Patents [OSTI]

A method is described for a systematic method of interpreting interference fringes obtained by using a corner cube retroreflector as an alignment aid when aligning a paraboloid to a spherical wavefront. This is applicable to any general case where such alignment is required, but is specifically applicable in the case of aligning an autocollimating test using a diverging beam wavefront. In addition, the method provides information which can be systematically interpreted such that independent information about pitch, yaw and focus errors can be obtained. Thus, the system lends itself readily to automation. Finally, although the method is developed specifically for paraboloids, it can be seen to be applicable to a variety of other aspheric optics when applied in combination with a wavefront corrector that produces a wavefront which, when reflected from the correctly aligned aspheric surface will produce a collimated wavefront like that obtained from the paraboloid when it is correctly aligned to a spherical wavefront. 14 figures.

Maxey, L.C.

1993-09-28T23:59:59.000Z

346

Concentrating Solar Power: Energy from Mirrors  

SciTech Connect (OSTI)

This fact sheet explains how concentrating solar power technology works and the three types of systems in development today: trough, dish, and central receiver.

Poole, L.

2001-02-27T23:59:59.000Z

347

Symbolic analysis of analog circuits containing voltage mirrors and current mirrors  

E-Print Network [OSTI]

Nacional de Astro?sica, Optica y Electro nica (INAOE),Nac- ional de Astro?sica, Optica y Electronica (INAOE),

Tlelo-Cuautle, E.; Sánchez-López, C.; Martínez-Romero, E.; Tan, Sheldon X.-D.

2010-01-01T23:59:59.000Z

348

Hull-Appendage Interaction of a Sailing Yacht, Investigated with Wave-Cut Techniques Jonathan R. Binns, Australian Maritime Engineering Cooperative Research Centre (AMECRC)  

E-Print Network [OSTI]

Measurement System k Form factor k Form factor calculated from wave-pattern results, can vary with yacht speed ) Yaw angle of yacht (degrees) Wave height (m) INTRODUCTION The primary objective of the research has

349

E-Print Network 3.0 - adobe photoshop elements Sample Search...  

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

video... identification logos and bumpers; and design graphics that use type, color and brand elements. Required textbook... : Adobe After Effects CS4: Classroom in a Book, by...

350

Digital Sensors Digital ports range from dgtl1 to dgtl12.  

E-Print Network [OSTI]

Digital Sensors Digital ports range from dgtl1 to dgtl12. Bumper or limit switch: (to be placed at the top of the program) #pragma config(Sensor, dgtl1, touchSensor, sensorTouch) (in the body of the program) int sensor_value; sensor_value = SensorValue(touchSensor); Bumper and Limit Switch

Beer, Randall D.

351

Focus control system for stretched-membrane mirror module  

DOE Patents [OSTI]

A focus control system dynamically sets and controls the focal length of a reflective membrane supported between a perimeter frame. A rear membrane is also supported between the perimeter frame rearward and spaced apart from a back side of the reflective membrane. The space between the membranes defines a plenum space into which a mass of gas at a first pressure is inserted. The pressure differential between the first pressure and an external pressure, such as the atmospheric pressure, causes the reflective membrane to assume a first curvature relative to a reference plane associated with the perimeter frame. This curvature defines the focal length of the reflective membrane. The focal length is dynamically controlled by changing the volume of the plenum space, thereby changing the first pressure. The system can be used to change or maintain the pressure differential and hence the front membrane curvature. The plenum volume is changed by pushing or pulling on a central section of the rear membrane using a suitable actuator. Sensing means continuously sense the location of the reflective membrane relative to the reference plane. This sensed position is compared to a reference position, and a resulting error signal, comprising the difference between the sensed position and reference position, drives the actuator in a direction to minimize the difference. A vent value compensates for temperature changes or leaks in the closed volume by allowing the pressure differential to be adjusted as required to center the working range of the actuator about the desired focal length.

Butler, Barry L. (Solana Beach, CA); Beninga, Kelly J. (San Diego, CA)

1991-01-01T23:59:59.000Z

352

Motion-Induced Radiation from a Dynamically Deforming Mirror  

E-Print Network [OSTI]

A path integral formulation is developed to study the spectrum of radiation from a perfectly reflecting (conducting) surface. It allows us to study arbitrary deformations in space and time. The spectrum is calculated to second order in the height function. For a harmonic traveling wave on the surface, we find many different regimes in which the radiation is restricted to certain directions. It is shown that high frequency photons are emitted in a beam with relatively low angular dispersion whose direction can be controlled by the mechanical deformations of the plate.

Faez Miri; Ramin Golestanian

1998-03-25T23:59:59.000Z

353

The Status of Mirror Research Based on a Workshop in  

E-Print Network [OSTI]

Construction, Confinement, and Power Balance · Circular coils enable smaller end plugs and higher fields by Deuterium Neutral Beams 10 #12;recent achievements max 60% nf 5x1019 m-3 11 GDT Central Beta Reaches 60.al., J. Fusion Energy, 17, p253 (1998) · [2] J. Pratt & W. Horton, Phys. Plasmas, 13,042513 (2006) · [3

354

Mirror Film Company Has 'Concentrated' Plans for Expansion |...  

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

10, 2010 - 1:19pm Addthis Lorelei Laird Writer, Energy Empowers In concentrating solar power, glass is king-but it's fighting to hold on to its crown. The reflectivity of...

355

TRANSPARENT HEAT MIRRORS FOR PASSIVE SOLAR HEATING APPLICATIONS  

E-Print Network [OSTI]

heating purposes. BACKGROUND The reduction of heat transfer rates by the use of thermal infraredheating applications should become available on the marketplace. Due to their high reflectivity to thermal infrared

Selkowitz, S.

2011-01-01T23:59:59.000Z

356

Wolter mirror microscope : novel neutron focussing and imaging optic  

E-Print Network [OSTI]

In this thesis, I investigated the effectiveness of a Wolter Type I neutron microscope as a focusing and imaging device for thermal and cold neutrons sources by simulating the performance of the optics in a standard neutron ...

Bagdasarova, Yelena S. (Yelena Sergeyevna)

2010-01-01T23:59:59.000Z

357

Diamond tool wear vs cutting distance on electroless nickel mirrors  

SciTech Connect (OSTI)

Wear data are presented for diamond tools cutting electroless nickel (eNi) for cut lengths up to 70,000 ft (13 miles). Two tools having different infrared absorption characteristics were used to cut an eNi preparation that had yielded minimum values for surface roughness and tool wear rate in a previous study. The data include Talystep measurement of the rms amplitude of the feed-marks versus cumulative cutting distance, representative examples of shape changes for the feed-mark profiles, SEM and optical micrographs of the tool rake and flank face wear zones, and measurements of the cutting edge profile and edge recession distance by a tool-nose replication technique. Feed-mark roughness values were found to increase from 5 to 90 A rms over the duration of the test, with an associated edge recession of about 1000 A and the development of a periodic tool edge grooving indicative of burnishing of the part surface. The ir absorption data successfully predicted the order of the two tools in terms of wear rate and fracture toughness.

Syn, C.K.; Taylor, J.S.; Donaldson, R.R.

1986-10-14T23:59:59.000Z

358

Fiber optic hydrophone sensor arrays using low reflectance internal mirrors  

E-Print Network [OSTI]

and the other by a wave in the tank. The hydrophones were monitored using a pulsed semiconductor laser light source and a photodiode. The feasibility of time division multiplexing of the hydrophones was confirmed in these tests....

Lee, Jong-Seo

2012-06-07T23:59:59.000Z

359

Relativistically Oscillating Mirrors for the Generation of Intense...  

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

Conference Room 108A Speaker: Christian Roedel, Friedrich-Schiller-University Jena, Germany Program Description High harmonic generation from relativistic plasma surfaces is...

360

Mirrors and Echoes: Women's Writing in Twentieth-Century Spain  

E-Print Network [OSTI]

Baltús sublima su creatividad frustrada en la lectura, perovoz, el espíritu y la creatividad femeninas con la crónicaque se da entre creatividad y frustración sexual y de los

Bergmann, Emilie L.; Herr, Richard

2007-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "appendages mirrors bumpers" 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

Mirrors and Echoes: Women's Writing in Twentieth-Century Spain  

E-Print Network [OSTI]

Contemporary Women Writers of Spain. Boston: Twayne, 1988.L. , ed. Women Writers of Spain: An Annotated Bio-Biblio-Identity in Contemporary Spain, ed. Jo Labanyi. New York:

Bergmann, Emilie L.; Herr, Richard

2007-01-01T23:59:59.000Z

362

TRANSPARENT HEAT MIRRORS FOR PASSIVE SOLAR HEATING APPLICATIONS  

E-Print Network [OSTI]

Energy, Office of Assistant Secretary for Conservation and Solarmirrors for energy conservation and passive solar heatingfor energy conservation and passive solar applications. ! £

Selkowitz, S.

2011-01-01T23:59:59.000Z

363

axisymmetric tandem mirror: Topics by E-print Network  

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

R. R. Volkas 2000-12-20 18 A dynamo model for axisymmetric and non-axisymmetric solar magnetic fields Astrophysics (arXiv) Summary: Increasing observations are becoming...

364

axisymmetric tandem mirrors: Topics by E-print Network  

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

R. R. Volkas 2000-12-20 18 A dynamo model for axisymmetric and non-axisymmetric solar magnetic fields Astrophysics (arXiv) Summary: Increasing observations are becoming...

365

Sensors and Actuators for the Advanced LIGO Mirror Suspensions  

E-Print Network [OSTI]

We have developed, produced and characterised integrated sensors, actuators and the related read-out and drive electronics that will be used for the control of the Advanced LIGO suspensions. The overall system consists of the BOSEMs (displacement sensor with integrated electro-magnetic actuator), the satellite boxes (BOSEM readout and interface electronics) and six different types of coil-driver units. In this paper we present the design of this read-out and control system, we discuss the related performance relevant for the Advanced LIGO suspensions, and we report on the experimental activity finalised at the production of the instruments for the Advanced LIGO detectors.

L. Carbone; S. M. Aston; R. M. Cutler; A. Freise; J. Greenhalgh; J. Heefner; D. Hoyland; N. A. Lockerbie; D. Lodhia; N. A. Robertson; C. C. Speake; K. A. Strain; A. Vecchio

2012-05-25T23:59:59.000Z

366

A micromachined deformable mirror for optical wavefront compensation  

E-Print Network [OSTI]

correction 'Corresponding author, Professor of Manufacturing Engineering, Boston University, 15 St Mary s St., Boston MA 02215, tgb@bu.edu, (617) 353-5619 2 Graduate student, Electrical and Computer Engineering chip carrier, which is in turn mounted to a component board. Ribbon cables (not shown) connect the 140

367

EFFECT OF TIN BOMBARDMENT AND DEPOSITION ON COLLECTOR MIRROR  

E-Print Network [OSTI]

regarding optics lifetime during EUV source operation. Two types of Sn exposures were performed in IMPACT knowledge about the behavior of EUV optics with Sn overlayers, which lead to a significant reflectivity loss) and X-ray photoelectron spectroscopy (XPS) conducted in real time during Sn-ion irradiation. In addition

Harilal, S. S.

368

Low energy electron bombardment induced surface contamination of Ru mirrors  

E-Print Network [OSTI]

of electrons irradiation along with slight oxidation of pure Ru surface. All chemical changes were discussed for EUVL vacuum chamber to avoid heat induced degradation of the EUV optics6 . Heating of MLM scan initiate

Harilal, S. S.

369

COS NUV TA1 Mirror Specification Date: December 8, 1999  

E-Print Network [OSTI]

Letter ECO No. Description Check Approved Date - Initial Release EW 8-13-99 A COS-024 Changes specified in ECO Original Release THE UNIVERSITY OF COLORADO Name Date At Boulder Drawn: E. Wilkinson 8...................................................................................................... 4 3.5 Shipping & Handling...................................

Colorado at Boulder, University of

370

Vacuum compatible, high-speed, 2-D mirror tilt stage  

DOE Patents [OSTI]

A compact and vacuum compatible magnetic-coil driven tiltable stage that is equipped with a high efficiency reflective coating can be employed as a scanner in EUV applications. The drive electronics for the scanner is fully in situ programmable and rapidly switchable.

Denham; Paul E. (Crockett, CA)

2007-09-25T23:59:59.000Z

371

Mirror-Image Stimulation Applied to Field Behavioral Studies  

E-Print Network [OSTI]

aggre- sive female limits recruitment into the colony (Down- hower and Armitage 1971). The behavioral profiles derived from factor anal- ysis of MIS (Fig. 1) fit well with our field observa- tions of social behavior and activity patterns. Of those...

Svendsen, Gerald E.; Armitage, Kenneth

1973-05-01T23:59:59.000Z

372

POLYMERIC MIRROR FILMS: DURABILITY IMPROVEMENT AND IMPLEMENTATION IN NEW  

Office of Environmental Management (EM)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May Jun Jul(Summary) "of Energy Power.pdf11-161-LNG |September 15, 2010Energy Series |DOE'sReassignmentsSpecialist9

373

Mirror contamination and secondary electron effects during EUV reflectivity analysis  

E-Print Network [OSTI]

Under Extreme Environment, School of Nuclear Engineering, Purdue University, West Lafayette, IN 47907 and subsequent EUV reflectivity loss using the IMPACT facility at Purdue University. Because Ru can either

Harilal, S. S.

374

Structural thermal noise in gram-scale mirror oscillators  

E-Print Network [OSTI]

The thermal noise associated with mechanical dissipation is a ubiquitous limitation to the sensitivity of precision experiments ranging from frequency stabilization to gravitational wave interferometry. We report on the ...

Neben, Abraham Richard

375

Mirror Descent based Database Privacy Prateek Jain1  

E-Print Network [OSTI]

about the dataset accurately (i.e., with small error), while pre- serving privacy of each individual in the dataset. In the non-interactive setting, the curator releases a "sanitized" version of the dataset scales as O( k). In the pursuit of obtaining a better error bound than O( k), [19] proposed

Rajamani, Sriram K.

376

Mirrors installed to help direct Spedding hallway traffic | The Ames  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr MayAtmospheric Optical Depth7-1D: VegetationEquipment SurfacesResource Program PreliminaryA3,0 AlabamaYearEnergyMira

377

Rapid Solar Mirror Characterization with Fringe Reflection Techniques -  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr MayAtmosphericNuclear Security Administration the1 -the Mid-Infrared at 278, 298, and 323Program2Raftopoulos(MeVcm²/mg)Rapid Scan

378

Sandia National Laboratories: optical magnetic mirrors without metals  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr MayAtmosphericNuclear Security Administration the1developmentturbine bladelifetime ismobile testnationalnuclearelectric field

379

Combined Reflectivity/imaging Method for Assessing Diagnostic Mirror  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr MayAtmospheric Optical Depth7-1D: Vegetation Proposed New SubstationClean Communities ofCellulosic(SNfactory)Cleaning Treatments ----

380

TRANSPARENT HEAT MIRRORS FOR PASSIVE SOLAR HEATING APPLICATIONS  

E-Print Network [OSTI]

AND OPTICAL PERFORMANCE [Btu/ft -hr- OF] XBL 785-8986A isbalance thermal losses is .9 Btu/ft 2 -hr- o F on a clearto an equivalent U-value of 1.9 Btu/ft 2-hr- o F due to

Selkowitz, S.

2011-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "appendages mirrors bumpers" 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

Deborah L. Leffler Florida Marine Research Institute. Florida Department of Natural Resources  

E-Print Network [OSTI]

, their perceived potential as a commercial resource, and their probable eco- logical importance as a forage fish bumpers' dry weight-length relation- ship was 3.25. Instantaneous daily mortalities (M) ranged from 0

382

x  

E-Print Network [OSTI]

As he looks the car over, he notices a small dent near the bumper. ... represents the sticker price of the car, find the equation that would be used to find x.

2003-12-02T23:59:59.000Z

383

The 28th International Cosmic Ray Conference 1 Portable, Single-mirror, Air Fluorescence Detector  

E-Print Network [OSTI]

kilometers. Power is supplied by a 15kW diesel generator. Both connex boxes are constructed in such a way facilities and historically these have been run o#11; of grid power. These luxuries are not always required

384

Seeing the magnetic monopole through the mirror of topological surface states  

SciTech Connect (OSTI)

Existence of the magnetic monopole is compatible with the fundamental laws of nature, however, this illusive particle has yet to be detected experimentally. In this work, we show that an electric charge near the topological surface state induces an image magnetic monopole charge due to the topological magneto-electric effect. The magnetic field generated by the image magnetic monopole can be experimentally measured, and the inverse square law of the field dependence can be determined quantitatively. We propose that this effect can be used to experimentally realize a gas of quantum particles carrying fractional statistics, consisting of the bound states of the electric charge and the image magnetic monopole charge.

Qi, Xiao-Liang; Li, Rundong; /Stanford U., Phys. Dept.; Zang, Jiadong; /Fudan U.; Zhang, Shou-Cheng; /Stanford U., Phys. Dept. /Fudan U.

2010-03-25T23:59:59.000Z

385

Modification of surface properties on a nitride based coating films through mirror-quality finish grinding  

E-Print Network [OSTI]

Constant Incidence Angle (CIA) method was used for a morethe sin 2 c method, and the CIA method measured the stressthe sin 2 c method and the CIA method showed high stress

Katahira, K.; Ohmori, H.; Komotori, J.; Dornfeld, D.; Kotani, H.; Mizutani, M.

2010-01-01T23:59:59.000Z

386

Shima-uta : of windows, mirrors, and the adventures of a traveling song  

E-Print Network [OSTI]

E-mail message to author. April 6 and 7. Sony, 2009. TheBoom: Biography. Sony Music Entertainment Japan. http://www.in Okinawa. According to Sony Music Japan, the record label

Alarcón-Jiménez, Ana-María

2009-01-01T23:59:59.000Z

387

Analysis and estimation of the threshold for a microwave "pellicle mirror" parametric oscillator, via energy conservation  

E-Print Network [OSTI]

An experiment is proposed to observe the dynamical Casimir effect by means of two tandem, high Q, superconducting microwave cavities, which are separated from each other by only a very thin wall consisting of a flexible superconducting membrane that can be driven into motion by means of resonant "pump" microwaves injected into the left cavity. Degenerate "signal" and "idler" microwave signals can then be generated by the exponential amplification of vacuum fluctuations in the initially empty right cavity, above a certain threshold. The purpose of this paper is calculate the threshold for this novel kind of opto-mechanical parametric oscillation, using energy considerations.

Chiao, Raymond Y

2012-01-01T23:59:59.000Z

388

Thermo-optic noise in coated mirrors for high-precision optical measurements  

E-Print Network [OSTI]

Thermal fluctuations in the coatings used to make high-reflectors are becoming significant noise sources in precision optical measurements and are particularly relevant to advanced gravitational wave detectors. There are two recognized sources of coating thermal noise, mechanical loss and thermal dissipation. Thermal dissipation causes thermal fluctuations in the coating which produce noise via the thermo-elastic and thermo-refractive mechanisms. We treat these mechanisms coherently, give a correction for finite coating thickness, and evaluate the implications for Advanced LIGO.

M. Evans; S. Ballmer; M. Fejer; P. Fritschel; G. Harry; G. Ogin

2008-07-30T23:59:59.000Z

389

Molecules in the mirror: how SERS backgrounds arise from the quantum method of images  

E-Print Network [OSTI]

, University of Glasgow, Glasgow G12 8QQ, UK b Cavendish Laboratory, Department of Physics, University of Cambridge, Cambridge, CB30HE, UK. E-mail: jjb12@cam.ac.uk † Electronic supplementary information (ESI) available: Additional derivation of eqn (5). See DOI... : 10.1039/c4cp00093e Received 8th January 2014, Accepted 20th February 2014 DOI: 10.1039/c4cp00093e www.rsc.org/pccp PCCP COMMUNICATION Pu bl ish ed o n 20 F eb ru ar y 20 14 . D ow nl oa de d by U ni ve rs ity o f C am br id ge o n 03 /0 3/ 20...

Baumberg, Jeremy; Barnett, Stephen; Harris, Nadine

2014-02-20T23:59:59.000Z

390

High energy neutrino in a nuclear environment: mirror asymmetry of the shadowing effect  

E-Print Network [OSTI]

The parity non-conservation effect in diffractive charged current DIS is quantified in terms of color dipole sizes of left-handed and right-handed electroweak bosons. We identify the origin and estimate the strength of the left-right asymmetry effect and present comparison with experimental data on the parity-odd structure function $\\Delta xF_3 =xF_3^{\

V. R. Zoller

2006-10-06T23:59:59.000Z

391

Bryozoan growth mirrors contrasting seasonal regimes across the Isthmus of Panama  

E-Print Network [OSTI]

of cupuladriid bryozoans. The Bocas del Toro region in the southern Caribbean experiences a very low mean annual cyclically, while in colonies from the Bocas del Toro region no strong trends are observed, hence paralleling, 1972; Morris, 1976; Sile¤n and Harme¤lin, 1976; Okamura, 1987; Okamura and Bishop, 1988; Hunter

Bermingham, Eldredge

392

E-Print Network 3.0 - aperture spherical mirror Sample Search...  

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

Center for Astronomical Adaptive Optics Collection: Physics 6 ISES-AP -3rd International Solar Energy Society Conference Asia Pacific Region (ISES-AP-08) Incorporating the 46th...

393

E-Print Network 3.0 - all-solid-state switchable mirror Sample...  

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

McGill University Collection: Engineering 6 Switchable window based on electrochromic polymers Chunye Xu,a) Summary: . L. Su, J. Fang, Z. Xiao, and Z. Lu: An...

394

Polarocryptic mirror of the lookdown as a biological model for open ocean camouflage  

E-Print Network [OSTI]

researchers recognized that the scattering environment of the water medium in the open ocean provides space, the open ocean represents a challenging environment for camouflage. Conventional strategies alteration for effective concealment in the complex open ocean environment. The open ocean is the predominant

Cummings, Molly E.

395

Surface Roughness of Stainless Steel Bender Mirrors for Focusing Soft X-rays  

E-Print Network [OSTI]

a polished, gold coated, electroless nickel surface, whichthe past, 15 with an electroless nickel surface for smoothwas coated with electroless nickel after the steel failed to

2005-01-01T23:59:59.000Z

396

Surface finish measurements of diamond-turned electroless-nickel-plated mirrors  

SciTech Connect (OSTI)

Surface roughness data are presented for a matrix of diamond-turned electroless nickel samples having a combination of six phosphorus contents and four heat treatments. Roughness measurements were conducted with commercial optical and stylus profilers (WYKO and Talystep). The results are discussed in terms of the material composition and heat treatment, plus other factors having an observed influence on the surface roughness. For the optimum material properties, full-length (665..mu..m) 20x WYKO scans yielded values of better than 10 A rms after correction for instrument roll-off.

Taylor, J.S.; Syn, C.K.; Saito, T.T.; Donaldson, R.R.

1986-09-01T23:59:59.000Z

397

Surface finish measurements of diamond-turned electroless-nickel-plated mirrors  

SciTech Connect (OSTI)

Surface roughness data are presented for a matrix of diamond-turned electroless-nickel samples having a combination of six phosphorous contents and four heat treatments. Roughness measurements were conducted with commercial optical and stylus profilometers (Wyko and Talystep). The results are discussed in terms of the material composition and heat treatment, plus other factors having an observed influence on the surface roughness. For the optimum material properties, full-length (665 ..mu..m) restored 20X Wyko scans yielded values of better than 10A rms.

Taylor, J.S.; Syn, C.K.; Saito, T.T.; Donaldson, R.R.

1985-08-16T23:59:59.000Z

398

VIRTUAL MIRROR: REAL-TIME TRACKING OF SHOES IN AUGMENTED REALITY ENVIRONMENTS  

E-Print Network [OSTI]

¨urgen Rurainsky, Philipp Fechteler Fraunhofer Institute for Telecommunications, Heinrich-Hertz Institute Einsteinufer 37, D-10587 Berlin, Germany {eisert, rurainsky, philipp.fechteler}@hhi.fraunhofer.de URL: http´ees, Paris, France. In this innovation cen- ter, a customer cannot chose only shoes from the shelf but design

Eisert, Peter

399

Enhanced Loss of Magnetic Mirror Trapped Fast Electrons by a Shear Alfven Wave  

E-Print Network [OSTI]

Principles of Plasma Diagnostics, Cambridge Universitymost widely used plasma diagnostics, detailed description ofhigh temperature plasma diagnostics [Camacho 1986] [Edwards

Wang, Yuhou

2013-01-01T23:59:59.000Z

400

Mirror Advanced Reactor Study (MARS). Final report. Volume 1-B. Commercial fusion electric plant  

SciTech Connect (OSTI)

Volume 1-B contains the following chapters: (1) blanket and reflector; (2) central cell shield; (3) central cell structure; (4) heat transport and energy conversion; (5) tritium systems; (6) cryogenics; (7) maintenance; (8) safety; (9) radioactivity, activation, and waste disposal; (10) instrumentation and control; (11) balance of plant; (12) plant startup and operation; (13) plant availability; (14) plant construction; and (15) economic analysis.

Donohue, M.L.; Price, M.E. (eds.)

1984-07-01T23:59:59.000Z

Note: This page contains sample records for the topic "appendages mirrors bumpers" 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

DEVELOPMENT OF WATER JET PLASMA MIRROR FOR STAGING OF LASER PLASMA ACCELERATORS  

E-Print Network [OSTI]

STAGING OF LASER PLASMA ACCELERATORS ? Dmitriy Panasenko,Staging Laser Plasma Accelerators (LPAs) is necessary in4]. INTRODUCTION Laser Plasma Accelerators (LPAs) have now

Panasenko, Dmitriy

2010-01-01T23:59:59.000Z

402

E-Print Network 3.0 - alloy mirrors obtained Sample Search Results  

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

alloy C. Li, Y.F. ... Source: Zheng, Yufeng - Department of Advanced Materials and Nanotechnology, Peking University Collection: Materials Science ; Biology and Medicine 2...

403

Pugilism as Mirror and Metafiction in Life and in Contemporary Spanish American Drama  

E-Print Network [OSTI]

The fact that theatrical performance has turned to one of the more savage forms of athletics to find expression for existence in these countries may reveal a renewed social and ethical preoccupation with the course of human events in this area... obsessions, his savagery, his chimeras, his Utopian sense of life and matter, even his cannibalism, pour out, on a level not counterfeit and illusory, but interior. (Artaud 92) The participatory and self-conscious identification of both the spectators...

Quackenbush, L. Howard

1992-10-01T23:59:59.000Z

404

Instrument Science Report Title: Focus monitoring and recommendation for secondary mirror move  

E-Print Network [OSTI]

optimal position in order to prevent signi cant image degradation in the UV. This criterion is indeed adequate for WFPC2, and it appears that some measurable degradation of the FOC images at the shortest

Sirianni, Marco

405

Object Dependent Properties of Mirrors for PV Applications Studied Under Accelerated Weathering Protocols  

E-Print Network [OSTI]

in the acrylic substrate, are highly susceptible to degradation from exposure to UV light. The degradation arises of a hydroxydephenyl benzotri- azole based UV stabilizer, which is sacrificially degraded by the UV light in order University, Cleveland, OH, 44106, USA Abstract--Lifetime and degradation science (L&DS) has been implemented

Rollins, Andrew M.

406

A 4096 Element Continuous Facesheet MEMS Deformable Mirror for High-Contrast Imaging  

E-Print Network [OSTI]

to provide structural support on electrical interconnections. Eight high density flex cables connect the DM using polysilicon surface micromachining manufacturing processes, with 4µm of stroke, a surface finish, that is electrically isolated from the electrodes and maintained at a ground potential. The actuators are arranged

407

Literary Studies at the University of Dar es Salaam: A Mirror of Tanzanian Socialism  

E-Print Network [OSTI]

and Tallu I969-I993 (Dues Salaam‘ Dar es Salaam UniversityThe University or Dar es Salaam: A Socialist Enterprise,‘andSpeeche.r m5.m7 (Dar es Salaam: Oxford University Press.

Sicherman, Carol

1997-01-01T23:59:59.000Z

408

Interfacing the tandem mirror reactor to the sulfur-iodine process for hydrogen production  

SciTech Connect (OSTI)

The blanket is linked to the H/sub 2/SO/sub 4/ vaporization units and SO/sub 3/ decomposition reactor with either sodium or helium. The engineering and safety problems associated with these choices are discussed. This H/sub 2/SO/sub 4/ step uses about 90% of the TMR heat and is best close-coupled to the nuclear island. The rest of the process we propose to be driven by steam and does not require close-coupling. The sodium loop coupling seems to be preferable at this time. We can operate with a blanket around 1200 K and the SO/sub 3/ decomposer around 1050 K. This configuration offers double-barrier protection between Li-Na and the SO/sub 3/ process gases. Heat pipes offer an attractive alternate to provide an additional barrier, added modularity for increased reliability, and tritium concentration and isolation operations with very little thermal penalty.

Galloway, T.R.

1980-06-02T23:59:59.000Z

409

The Transatlantic Mirror: Effects of the American Image on Postwar British Identity  

E-Print Network [OSTI]

This project examines three British novels, which look back in history to World War II and one novel that romanticizes the Vietnam War. The novels that make up my research are Brideshead Revisited by Evelyn Waugh, The Remains of the Day by Kazuo...

Evans, Philip

2007-08-03T23:59:59.000Z

410

Editorials and fiction in "The Craftsman Magazine" (1901-1916): mirror of an age  

E-Print Network [OSTI]

new party, a party that became the Bull Moose faction. Other 28 editorials in 1910, 1912 and 1913 further substantiate his increasing concern for political issues. The line adhered to in the editorials is the Progressive platform ? -equal... opportunities, honesty and loyalty from representatives, control of corporations, social welfare and recognition of the government as existing for the people. In December 1913, he states that "The nation has learned to think in terms of welfare instead...

Holm, Judith Stout

1975-01-01T23:59:59.000Z

411

Climate changes mirror global warming predictions BY THOMAS CROWLEY Guest columnist  

E-Print Network [OSTI]

have a word for robins! All this, and we have still only utilized 5 percent of the available fossil need is for these citizens to register their concern to members of Congress, and get them to wake up be exported elsewhere. These goals can be accomplished without sending us back to the stone age

412

Special topics reports for the reference tandem mirror fusion breeder. Volume 2. Reactor safety assessment  

SciTech Connect (OSTI)

The safety features of the reference fission suppressed fusion breeder reactor are presented. These include redundancy and overcapacity in primary coolant system components to minimize failure probability, an improved valve location logic to provide for failed component isolation, and double-walled coolant piping and steel guard vessel protection to further limit the extent of any leak. In addition to the primary coolant and decay heat removal system, reactor safety systems also include an independent shield cooling system, the module safety/fuel transfer coolant system, an auxiliary first wall cooling system, a psssive dump tank cooling system based on the use of heat pipes, and several lithium fire suppression systems. Safety system specifications are justified based on the results of thermal analysis, event tree construction, consequence calculations, and risk analysis. The result is a reactor design concept with an acceptably low probability of a major radioactivity release. Dose consequences of maximum credible accidents appear to be below 10CFR100 regulatory limits.

Maya, I.; Hoot, C.G.; Wong, C.P.C.; Schultz, K.R.; Garner, J.K.; Bradbury, S.J.; Steele, W.G.; Berwald, D.H.

1984-09-01T23:59:59.000Z

413

Device Overview The Smart Mirror system consists of a depth camera, a  

E-Print Network [OSTI]

to other fields that require building 3D models, such as animation and 3D printing. Nikhil Das, Behnam

Wang, Deli

414

Demonstration of a novel focusing small-angle neutron scattering instrument equipped with axisymmetric mirrors  

E-Print Network [OSTI]

Small-angle neutron scattering (SANS) is the most significant neutron technique in terms of impact on science and engineering. However, the basic design of SANS facilities has not changed since the technique’s inception ...

Liu, Dazhi

415

Characterization, performance and optimization of PVDF as a piezoelectric film for advanced space mirror concepts.  

SciTech Connect (OSTI)

Piezoelectric polymers based on polyvinylidene fluoride (PVDF) are of interest for large aperture space-based telescopes as adaptive or smart materials. Dimensional adjustments of adaptive polymer films depend on controlled charge deposition. Predicting their long-term performance requires a detailed understanding of the piezoelectric material features, expected to suffer due to space environmental degradation. Hence, the degradation and performance of PVDF and its copolymers under various stress environments expected in low Earth orbit has been reviewed and investigated. Various experiments were conducted to expose these polymers to elevated temperature, vacuum UV, {gamma}-radiation and atomic oxygen. The resulting degradative processes were evaluated. The overall materials performance is governed by a combination of chemical and physical degradation processes. Molecular changes are primarily induced via radiative damage, and physical damage from temperature and atomic oxygen exposure is evident as depoling, loss of orientation and surface erosion. The effects of combined vacuum UV radiation and atomic oxygen resulted in expected surface erosion and pitting rates that determine the lifetime of thin films. Interestingly, the piezo responsiveness in the underlying bulk material remained largely unchanged. This study has delivered a comprehensive framework for material properties and degradation sensitivities with variations in individual polymer performances clearly apparent. The results provide guidance for material selection, qualification, optimization strategies, feedback for manufacturing and processing, or alternative materials. Further material qualification should be conducted via experiments under actual space conditions.

Jones, Gary D.; Assink, Roger Alan; Dargaville, Tim Richard; Chaplya, Pavel Mikhail; Clough, Roger Lee; Elliott, Julie M.; Martin, Jeffrey W.; Mowery, Daniel Michael; Celina, Mathew Christopher

2005-11-01T23:59:59.000Z

416

Off-axis variable focus and aberration control mirrors and method  

DOE Patents [OSTI]

An optical element with multi-layer composites that deforms to reduce optical aberrations in off-axis optic. Methods are also described in relation to the optical element.

Himmer, Phillip A.; Dickensheets, David L.

2009-02-24T23:59:59.000Z

417

Biomedical nuclear and X-ray imager using high-energy grazing incidence mirrors  

DOE Patents [OSTI]

Imaging of radiation sources located in a subject is explored for medical applications. The approach involves using grazing-incidence optics to form images of the location of radiopharmaceuticals administered to a subject. The optics are "true focusing" optics, meaning that they project a real and inverted image of the radiation source onto a detector possessing spatial and energy resolution.

Ziock, Klaus-Peter; Craig, William W.; Hasegawa, Bruce; Pivovaroff, Michael J.

2005-09-27T23:59:59.000Z

418

Imaging nonlinear scatterers applying the time reversal mirror T. J. Ulricha  

E-Print Network [OSTI]

evaluation NDE applications of linear TRM to date include detection of small, low-contrast defects within applied to nondestructive evaluation NDE have demonstrated that the nonlinear elastic response applications to NDE have been developed by many groups in the US, Europe, and Russia. TRA focusing, providing

419

Construction and operation of a Mirror Langmuir Probe diagnostic for the Alcator C-Mod tokamak  

E-Print Network [OSTI]

Langmuir probe diagnostic systems presently employed on Alcator C-Mod and elsewhere generally suffer from a severe limitation: unless multiple electrode or high-frequency bias techniques are employed, these systems can not ...

Lyons, Laurence Anthony

2007-01-01T23:59:59.000Z

420

Advances in Concentrating Solar Power Collectors: Mirrors and Solar Selective Coatings  

SciTech Connect (OSTI)

The intention is to explore the feasibility of depositing the coating by lower-cost methods and to perform a rigorous cost analysis after a viable high-temperature solar-selective coating is demonstrated by e-beam.

Kenendy, C. E.

2007-10-10T23:59:59.000Z

Note: This page contains sample records for the topic "appendages mirrors bumpers" 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

Sub-structure of laser generated harmonics reveals plasma dynamics of a relativistically oscillating mirror  

SciTech Connect (OSTI)

Theoretical and experimental investigations of the dynamics of a relativistically oscillating plasma slab reveal spectral line splitting in laser driven harmonic spectra, leading to double harmonic series. Both series are well characterized with harmonics arising by two fundamental frequencies. While a relativistic oscillation of the critical density drives the harmonic emission, the splitting is a result of an additional acceleration during the laser pulse duration. In comparison with the oscillatory movement, this acceleration is rather weak and can be described by a plasma shock wave driven by the pressure of light. We introduce particle in cell simulations and an analytical model explaining the harmonic line splitting. The derived analytical formula gives direct access between the splitting in the harmonic spectrum and the acceleration of the plasma surface.

Braenzel, J.; Schnürer, M.; Steinke, S.; Priebe, G.; Sandner, W. [Max-Born-Institut für Nichtlineare Optik und Kurzzeitspektroskopie, Max Born Str. 2A, 12489 Berlin (Germany)] [Max-Born-Institut für Nichtlineare Optik und Kurzzeitspektroskopie, Max Born Str. 2A, 12489 Berlin (Germany); Andreev, A. [Max-Born-Institut für Nichtlineare Optik und Kurzzeitspektroskopie, Max Born Str. 2A, 12489 Berlin (Germany) [Max-Born-Institut für Nichtlineare Optik und Kurzzeitspektroskopie, Max Born Str. 2A, 12489 Berlin (Germany); Vavilov State Optical Institute, Birzhevaya line 4, 199034 St. Petersburg (Russian Federation); Platonov, K. [Vavilov State Optical Institute, Birzhevaya line 4, 199034 St. Petersburg (Russian Federation)] [Vavilov State Optical Institute, Birzhevaya line 4, 199034 St. Petersburg (Russian Federation)

2013-08-15T23:59:59.000Z

422

Time dependence of particle creation from accelerating mirrors Michael R. R. Good*  

E-Print Network [OSTI]

time resolution of the particle production process can be obtained. DOI: 10.1103/PhysRevD.88 that has been largely unexplored is the study of the time dependence of the particle production process dependence of creation. One way to explore the time dependence of particle production is through the use

Anderson, Paul R.

423

E-Print Network 3.0 - ancient bronze mirrors Sample Search Results  

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

of the World Summary: of Tsavo 8 9 10 11 12 13 14 Africa: Benin Bronzes Inside Ancient Egypt: Harwa* Elizabeth Hubert Malott Hall... 1010 Permanent Collection Audio Tour Plants of...

424

Numerical Analysis for Controlling the Eigenmode Formation of Alfven Waves in the GAMMA 10 Tandem Mirror  

SciTech Connect (OSTI)

The numerical analysis is performed with two dimensional wave code for controlling the eigenmode formation of fast Alfven waves in the GAMMA 10 central cell. The plasma production by fast waves depends on the wave excitation in the plasma. Eigenmodes are strongly formed when the boundary conditions in the axial and radial directions are satisfied. As the optimum density for the formation of eigenmode exists discretely, the density is clamped at the value where the eigenmode is strongly formed. For the higher density plasma production, the eigenmodes must be continuously excited as the density increases. It is found that the almost continuous excitation of eigenmodes can be realized by using two waves with different frequencies at the same time.

Yamaguchi, Y. [Plasma Research Center, University of Tsukuba (Japan); Ichimura, M. [Plasma Research Center, University of Tsukuba (Japan); Higaki, H. [Plasma Research Center, University of Tsukuba (Japan); Kakimoto, S. [Plasma Research Center, University of Tsukuba (Japan); Ide, K. [Plasma Research Center, University of Tsukuba (Japan); Inoue, D. [Plasma Research Center, University of Tsukuba (Japan); Nagai, H. [Plasma Research Center, University of Tsukuba (Japan); Nakagome, K. [Plasma Research Center, University of Tsukuba (Japan); Fukuyama, A. [Kyoto University (Japan); Cho, T. [Plasma Research Center, University of Tsukuba (Japan)

2005-01-15T23:59:59.000Z

425

Bob Ellis designs a PPPL first: A 3D printed mirror for microwave...  

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

for shorter experiments, decided to try out a novel manufacturing process called 3D printing that produces components as unified wholes with minimal need for further...

426

Catalyzing Alpha-Channeling by Minority Ion Injection in Mirror Machines  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr MayAtmospheric Optical Depth7-1D: Vegetation Proposed New Substation Sites ProposedOccupational Healthcatalysts . | EMSL roles of

427

Amazing Mirrors and Superlative Supercomputers | U.S. DOE Office of Science  

Office of Science (SC) Website

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr MayAtmosphericNuclear SecurityTensile Strain Switched5 Industrial CarbonArticlesHuman ResourcesScienceHomeAboutLightAllen J. Bard,(SC)

428

SciTech Connect: Technology of mirror machines: LLL facilities for magnetic  

Office of Scientific and Technical Information (OSTI)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May Jun Jul(Summary)morphinanInformation InInformation InExplosion Monitoring: Innovation and IntegrationExperiment:

429

Time dependent changes in extreme ultraviolet reflectivity of Ru mirrors from electron-induced surface chemistry  

E-Print Network [OSTI]

for Materials Under Extreme Environment, School of Nuclear Engineering Purdue University, West Lafayette verified by Auger electron spectroscopy (AES). Moreover, the impact on EUV reflectivity (EUVR) with time

Harilal, S. S.

430

Design and modeling of a third generation slumping tool for X-ray telescope mirrors/  

E-Print Network [OSTI]

Glass sheets with high surface quality and angular resolution of 5 arcsec are in demand for the International X-Ray Observatory. Several glass flattening techniques are presented in this thesis, including a method of ...

Al Husseini, Abdul Mohsen Z. (Abdul Mohsen Zuheir)

2011-01-01T23:59:59.000Z

431

The Implementation of a Super Mirror Polarizer at the SNS Fundamental Neutron Physics Beamline  

SciTech Connect (OSTI)

A new bender supermirror polarizer is used to polarize the cold neutron beam at the Fundamental Neutron Physics Beamline at the Spallation Neutron Source. We present the design of a compensation magnet that was built around the polarizer to minimize the polarizer fringe fields that could compromise the magnetic field requirements of the NPDGamma experiment for the field uniformity in the spin rotator and the field direction in the liquid hydrogen target located downstream from the polarizer. The entire magnetic field environment of the experiment has been analyzed using a finite-element model. Measurements of the magnetic field gradients and field direction have been carried out and the results are less than the upper limits required in the experiment. According to the results the compensated fields meet the stringent magnetic field requirements of the experiment defined by the systematic errors that have to be well below the statistical uncertainty of 10 8 in our main observable, the gamma asymmetry in neutron capture on hydrogen. We describe the design of the magnetic field, the construction of the compensation magnet, and we compare results of the field measurements with the results from the model.

Balascuta, S. [Arizona State University; Alarcon, R. [Arizona State University; Baessler, S. [University of Virginia and Oak Ridge National Laboratory (ORNL); Greene, Geoffrey [University of Tennessee, Knoxville (UTK); Mietke, A [Technische Universitat Dresden; Crawford, C. [University of Kentucky, Lexington; Milburn, R. [University of Kentucky, Lexington; Penttila, Seppo [Oak Ridge National Laboratory (ORNL); Prince, J. [University of Virginia, Charlottesville; Schädler, J. [Jacobs University, Bremen, Germany & University of Virginia, Charlottesville

2012-01-01T23:59:59.000Z

432

Toward quantum opto-mechanics in a gram-scale suspended mirror interferometer  

E-Print Network [OSTI]

A new generation of interferometric gravitational wave detectors, currently under construction, will closely approach the fundamental quantum limits of measurement, serving as a prominent example of quantum mechanics at ...

Wipf, Christopher (Christopher Conrad)

2013-01-01T23:59:59.000Z

433

POLYMERIC MIRROR FILMS: DURABILITY IMPROVEMENT AND IMPLEMENTATION IN NEW COLLECTOR DESIGNS  

Office of Environmental Management (EM)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May Jun Jul(Summary) "of EnergyEnergyENERGY TAXBalanced ScorecardReactorBatteries for Advanced P - . . - - 4DepartmentIncentive

434

Borehole Imaging of In Situ Stress Tests at Mirror Lake Research Site |  

Open Energy Info (EERE)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Office of InspectorConcentrating SolarElectricEnergyCTBarre BiomassTHIS PAGEFairfield Sector BiomassSite:Open Energy

435

Rigorous treatment of charge exchange, ionization, and collisional processes in neutral-beam-injected mirrors  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr MayAtmosphericNuclear Security Administration the1 -the Mid-Infrared0 Resource Program September Department ofRiehle.Rigorous treatment

436

TOPHAT(tm) for the Alignment & Focus of Heliostat Mirror Facets - Energy  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr MayAtmosphericNuclear Security AdministrationcontrollerNanocrystallineForeign Object DamageSystemsU.S.

437

Bob Ellis designs a PPPL first: A 3D printed mirror for microwave launchers  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr MayAtmospheric Optical Depth (AOD)ProductssondeadjustsondeadjustAboutScienceCareers Apply forBiosurveillance A8 Blythe-Knob1 As is often|

438

Bob Ellis designs a PPPL first: A 3D printed mirror for microwave launchers  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr MayAtmospheric Optical Depth (AOD)ProductssondeadjustsondeadjustAboutScienceCareers Apply forBiosurveillance A8 Blythe-Knob1 As is often||

439

Sandia National Laboratories: New Sandia Mirror Isn't Shiny: Instead It  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May JunDatastreamsmmcrcalgovInstrumentsrucLas ConchasPassive SolarEducationStationCSP Resources On September 26, 2012,MoreCreepto

440

Cleanable and Hardcoat Coatings for Increased Durability of Silvered Polymeric Mirrors  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr MayAtmospheric Optical Depth7-1D: Vegetation Proposed New SubstationClean Communities of WesternVail Global Energy Forum Dr.2 P r o

Note: This page contains sample records for the topic "appendages mirrors bumpers" 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

Copyright 2003 The Times Mirror Company; Los Angeles Times All Rights Reserved  

E-Print Network [OSTI]

to safe drinking water, energy and markets. The United Nations' 2003 Human Development Report, released, there are candidates for expanded aid right now: the vibrant democracies of Bangladesh, Bolivia, Ghana, Senegal

442

E-Print Network 3.0 - abdominal circulatory pump Sample Search...  

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

the abdominal ganglia... these appendages, insects rely on special, small circulatory pumps, known collectively as accessory pulsatile... Circulatory System 169 C In summary, the...

443

http://www.swissinfo.org/eng/search/detail/Bird_flu_ban_remains_despite_migration_shift.html?siteSect=881& sid=7420407&cKey=1168586962000  

E-Print Network [OSTI]

, warmer than average temperatures in the Atlantic and Mediterranean ­ all pumping heat into the atmosphere_flu_ban_remains_despite_migration_shift.html?siteSect=881& sid=7420407&cKey=1168586962000 Monday 05.03.2007 Climate warning resonates in Switzerland weather heralded a bumper year for bugs and ticks. He said a cold snap in February or March would still

Alvarez, Nadir

444

Development of painting technology using plasma surface technology for automobile parts  

E-Print Network [OSTI]

Development of painting technology using plasma surface technology for automobile parts C.-K. Jung of automobile parts is the surface treatment of polyolefin (Polypropylene (RX-2000)) bumper substrates. In order plasma treatment; Adhesion and wettability test 1. Introduction In the automobile industry a complex

Boo, Jin-Hyo

445

06/21/2007 02:33 PMA Warning System As Your Co-Pilot -WSJ.com Page 1 of 2http://online.wsj.com/public/article_print/SB118237615627242545.html  

E-Print Network [OSTI]

quickly, the car automatically slows to a safe-braking distance. Upside: If the car complains when you that gauge and maintain safe-braking distances may keep bumper riders -- and fender benders -- in check of this material are governed by our Subscriber A

Shashua, Amnon

446

Report to the Western Water Policy Review Advisory Commission  

E-Print Network [OSTI]

Albuquerque, New Mexico Appointed Members: Huali Chai San Jose, California John H. Davidson Vermillion, South.S. Senate: Committee on Energy and Natural Resources Hon. Frank Murkowski, Chairman Hon. Dale Bumpers: Subcommittee on Water and Power, Committee on Energy and Natural Resources Hon. Jon Kyl, Chairman Hon. Daniel K

Selker, John

447

How the rich world can help Africa help itself By Glenn Denning and Jeffrey Sachs  

E-Print Network [OSTI]

of subsidised farm inputs, Malawi needs to invest in water harvesting and irrigation, diversified agriculture - as they promised two years ago in Gleneagles - the fight can be won. In 2005, Malawi's maize harvest was one are harvesting a bumper crop for the second year running, which may reach a record 3.2m tonnes. Yields have

448

Texas Rice, Volume IV, Number 8  

E-Print Network [OSTI]

by Dr. Bob Fjelstrom, USDA-ARS Molecular Geneticist at the Beaumont Center. The cereal quality analyses were performed by the ARS Quality Lab at Beaumont in conjunction with Dr. Rolfe Bryant at the Dale Bumpers National Rice Research Center in Stuttgart...

449

To appear, AAAI 1998 Fall Symposium on Cognitive Robotics 1 Embodied Cassie  

E-Print Network [OSTI]

version of this robot, we used a commer­ cial Nomad robot enhanced, by Amherst Systems, Inc., with a foveal vision system consisting of a pair of cam­ eras with associated hardware and software. The No­ mad came supplied with sonar, bumpers, and wheels. Cassie, in her role as a FEVAHR, operates in a 17 0

Shapiro, Stuart C.

450

antimony 110: Topics by E-print Network  

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

parts of our lab telescopes and their functions: Base Tube Primary mirror Secondary mirror "Spider" (secondary mirror support Barnes, Joshua Edward 42 ASTR 110L Lab Fall 2011...

451

Received 15 Apr 2014 | Accepted 13 Aug 2014 | Published 17 Sep 2014 Thermal mirror buckling in freestanding graphene  

E-Print Network [OSTI]

Training University, Lavizan, Tehran 16788, Iran. 3 Department of Physics, University of Arkansas in freestanding graphene locally controlled by scanning tunnelling microscopy M. Neek-Amal1,2, P. Xu3,4, J.K. Schoelz3, M.L. Ackerman3, S.D. Barber3, P.M. Thibado3, A. Sadeghi5 & F.M. Peeters1 Knowledge

Thibado, Paul M.

452

A review of "The Public Mirror: Molière and the Social Commerce of Depiction." by Larry F. Norman  

E-Print Network [OSTI]

, and it is precisely these contradictions and paradoxes which Paige claims to be con- stitutive of modern subjectivity. In his introduction, Paige quotes approvingly Judith Butler?s formulation of the modern process of subjection: ??[T]aken to be the condition... for and instrument of agency,? Judith Butler has recently argued, ?[the subject] is at the same time the effect of subordination, understood as the deprivation of agency?? (4). This essentially Foucauldian insight is confirmed in the early writings ...

Kiki Gounaridou

2002-01-01T23:59:59.000Z

453

Characterization Of High-Stroke High-Aspect Ratio Micro Electro Mechanical Systems Deformable Mirrors For Adaptive Optics  

E-Print Network [OSTI]

and Characterization of High- Stroke High-Aspect Ratio Microrequire  a  high  stroke  of  10?m  of   mechanical  that  provide  only  a  stroke  of  less  than   6?m  for  

Bouchti, Mohamed Amine

2013-01-01T23:59:59.000Z

454

Method and apparatus for mounting a dichroic mirror in a microwave powered lamp assembly using deformable tabs  

DOE Patents [OSTI]

A microwave powered electrodeless lamp includes an improved screen unit having mesh and solid sections with an internal reflector secured at the juncture of the two sections to reflect light into a light-transmitting chamber defined in the lamp microwave cavity by the reflector and the mesh section. A discharge envelope of a bulb is disposed in the light-transmitting chamber. Light emitted from the envelope is prevented by the reflector from entering the cavity portion bounded by the solid section of the screen. The reflector is mounted in the cavity by tabs formed in the screen unit and bendable into the cavity to define support planes abutting respective surfaces of the reflector. The mesh section and tabs are preferably formed by etching a thin metal sheet. 7 figs.

Ury, M.; Sowers, F.; Harper, C.; Love, W.

1998-11-24T23:59:59.000Z

455

Method and apparatus for mounting a dichroic mirror in a microwave powered lamp assembly using deformable tabs  

DOE Patents [OSTI]

A microwave powered electrodeless lamp includes an improved screen unit having mesh and solid sections with an internal reflector secured at the juncture of the two sections to reflect light into a light-transmitting chamber defined in the lamp microwave cavity by the reflector and the mesh section. A discharge envelope of a bulb is disposed in the light-transmitting chamber. Light emitted from the envelope is prevented by the reflector from entering the cavity portion bounded by the solid section of the screen. The reflector is mounted in the cavity by tabs formed in the screen unit and bendable into the cavity to define support planes abutting respective surfaces of the reflector. The mesh section and tabs are preferably formed by etching a thin metal sheet.

Ury, Michael (Bethesda, MD); Sowers, Frank (Frederick, MD); Harper, Curt (Wheaton, MD); Love, Wayne (Olney, MD)

1998-01-01T23:59:59.000Z

456

E12-14-009: Ratio of the electric form factor in the mirror nuclei 3He and 3H  

E-Print Network [OSTI]

E12-14-009: We propose to extract the ratio of the electric form factor (G_E) of 3He and 3H from the measured ratio of the elastic-scattering cross sections at E_beam = 1.1 GeV. Measurements at low Q^2 ( < 0.1 GeV^2) will allow accurate extraction of G_E with minimal contributions from the magnetic form factor (G_M) and Coulomb corrections. From this data we will extract the difference between the charge radii for 3He and 3H. This short experiment, 1.5 days, will utilize the left Hall A high resolution spectrometer and the one-time availability of a 1 kCi tritium target at Jefferson Lab which has been approved for the E12-10-103, E12-11-112 and E12-14-011 experiments.

L. S Myers; D. W. Higinbotham; J. R. Arrington

2014-08-22T23:59:59.000Z

457

Characteristics of AlN/GaN nanowire Bragg mirror grown on (001) silicon by molecular beam epitaxy  

SciTech Connect (OSTI)

GaN nanowires containing AlN/GaN distributed Bragg reflector (DBR) heterostructures have been grown on (001) silicon substrate by molecular beam epitaxy. A peak reflectance of 70% with normal incidence at 560 nm is derived from angle resolved reflectance measurements on the as-grown nanowire DBR array. The measured peak reflectance wavelength is significantly blue-shifted from the ideal calculated value. The discrepancy is explained by investigating the reflectance of the nanoscale DBRs with a finite difference time domain technique. Ensemble nanowire microcavities with In{sub 0.3}Ga{sub 0.7}N nanowires clad by AlN/GaN DBRs have also been characterized. Room temperature emission from the microcavity exhibits considerable linewidth narrowing compared to that measured for unclad In{sub 0.3}Ga{sub 0.7}N nanowires. The resonant emission is characterized by a peak wavelength and linewidth of 575 nm and 39 nm, respectively.

Heo, Junseok; Bhattacharya, Pallab [Center for Photonics and Multiscale Nanomaterials, Department of Electrical Engineering and Computer Science, University of Michigan, Ann Arbor, Michigan 48109-2122 (United States)] [Center for Photonics and Multiscale Nanomaterials, Department of Electrical Engineering and Computer Science, University of Michigan, Ann Arbor, Michigan 48109-2122 (United States); Zhou, Zifan [Department of Electrical and Computer Engineering, University of Michigan-Dearborn, Dearborn, Michigan 48128 (United States)] [Department of Electrical and Computer Engineering, University of Michigan-Dearborn, Dearborn, Michigan 48128 (United States); Guo, Wei [Microsystems Engineering, Rochester Institute of Technology, Rochester, New York 14623 (United States)] [Microsystems Engineering, Rochester Institute of Technology, Rochester, New York 14623 (United States); Ooi, Boon S. [Photonics Laboratory, King Abdullah University of Science and Technology, Thuwal 23955-6900 (Saudi Arabia)] [Photonics Laboratory, King Abdullah University of Science and Technology, Thuwal 23955-6900 (Saudi Arabia)

2013-10-28T23:59:59.000Z

458

Sublime Love and the Ethics of Equality in a Homoerotic Novel of the Nineteenth Century: "Precious Mirror of Boy Actresses"  

E-Print Network [OSTI]

defining example of feminine superiority and the best illustra¬ tion of the feminine subject position in its ontological aspect, namely, Q inyans act of "leaving his profession/' gaihang BJC f r . Qinyan leaves the opera troupe and becomes the adopted...

McMahon, Keith

2002-01-01T23:59:59.000Z

459

Method for high-precision multi-layered thin film deposition for deep and extreme ultraviolet mirrors  

DOE Patents [OSTI]

A method for coating (flat or non-flat) optical substrates with high-reflectivity multi-layer coatings for use at Deep Ultra-Violet (DUV) and Extreme Ultra-Violet (EUV) wavelengths. The method results in a product with minimum feature sizes of less than 0.10 [micro]m for the shortest wavelength (13.4 nm). The present invention employs a computer-based modeling and deposition method to enable lateral and vertical thickness control by scanning the position of the substrate with respect to the sputter target during deposition. The thickness profile of the sputter targets is modeled before deposition and then an appropriate scanning algorithm is implemented to produce any desired, radially-symmetric thickness profile. The present invention offers the ability to predict and achieve a wide range of thickness profiles on flat or figured substrates, i.e., account for 1/R[sup 2] factor in a model, and the ability to predict and accommodate changes in deposition rate as a result of plasma geometry, i.e., over figured substrates. 15 figs.

Ruffner, J.A.

1999-06-15T23:59:59.000Z

460

Smoke and mirrors to modern computers : rethinking the design and implementation of interactive, location-based entertainment experiences  

E-Print Network [OSTI]

We have yet to create the ultimate interactive experience. Why is that so, and how can that change? How can we increase our chances of getting it right? Interactive, location-based experiences are a new genre and need a ...

Strickon, Joshua Andrew, 1976-

2003-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "appendages mirrors bumpers" 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

THE TRANSCENDENTAL PART OF THE REGULATOR MAP FOR K1 ON A MIRROR FAMILY OF K3 SURFACES  

E-Print Network [OSTI]

their graded pieces with respect to the -filtration may be computed as (1.1) grp Kn(X)Q = CHp (X, n)Q where CHp) for a smooth complex projec- tive surface X. It is known that CH1(X, 1) = CÃ? and CHp(X, 1) = 0 for p 4

462

THE TRANSCENDENTAL PART OF THE REGULATOR MAP FOR K1 ON A MIRROR FAMILY OF K3 SURFACES  

E-Print Network [OSTI]

.1) grpflKn(X)Q ~=CHp(X, n)Q where CHp(X, n) are Bloch's higher Chow groups [3]. This isomorphism gives. It is known that CH1(X, 1) = Cx and CHp(X, 1) = 0 for p 4. Th* *e remaining interesting parts of K1

463

The landscape is like a mirror of human and natural interaction process. Everything what we do in everyday life,  

E-Print Network [OSTI]

: Lielauces muiza) is a manor house built in late classical or Empire style in the 19th century for Count ecological, cultural, mystical and artistic prism. WORKSHOPS Four workshops will be provided

Wolkenhauer, Olaf

464

Novel all-optical 10 Gbp/s RZ-to-NRZ conversion using SOA-loop-mirror  

E-Print Network [OSTI]

-712, Korea Tel: +82-62-970-2218, Fax: +82-62-970-2204, e-mail: csp@kjist.ac.kr Abstract: This paper proposes format. Therefore, RZ-to- NRZ format converter is essential in linking and interfacing the ultra

Kolner, Brian H.

465

Characterization Of High-Stroke High-Aspect Ratio Micro Electro Mechanical Systems Deformable Mirrors For Adaptive Optics  

E-Print Network [OSTI]

Journal of Microelectromechanical Systems 8, 497– 8)High-aspect ratio microelectromechanical systems deformable

Bouchti, Mohamed Amine

2013-01-01T23:59:59.000Z

466

FrameBox and MirrorBox: Tools and Guidelines to Support Designers in Prototyping Interfaces for 3D Displays  

E-Print Network [OSTI]

BMW Group 3 University of Stuttgart Media Informatics Group Research & Technology VIS AmalienstraÃ?e 17 firstname.lastname@ifi.lmu.de Nora.NB.Broy@bmw.de firstname.lastname@vis.uni-stuttgart.de Figure 1: We 3D displays are nowadays widely available for entertainment in cinemas or home environments. While

467

State-space modeling and optimal control of ship motions in a seastate  

E-Print Network [OSTI]

In this thesis, a new state-space model and motion control algorithm are developed from first principles for the improvement of the seakeeping performance of high-speed vessels equipped with lifting appendages that are ...

Ulusoy, Talha

2006-01-01T23:59:59.000Z

468

E-Print Network 3.0 - axillary artery compromise Sample Search...  

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

Ecology ; Biology and Medicine 2 1) Taenia coli, haustra, and epiploic appendages are terms that apply to the: 2) Quadrate lobe, muralium, and bare area are terms that apply to...

469

E-Print Network 3.0 - axillary artery pseudoaneurysm Sample Search...  

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

Ecology ; Biology and Medicine 2 1) Taenia coli, haustra, and epiploic appendages are terms that apply to the: 2) Quadrate lobe, muralium, and bare area are terms that apply to...

470

Airfoil Vortex Induced Vibration suppression devices  

E-Print Network [OSTI]

Vortex Induced Vibrations (VIV) is a major concern of the offshore oil industry. This problem leads to fatigue failure in the marine risers and causes costly replacement of the risers. Appendages such as helical strakes ...

Lee, Evan J. (Evan Joseph)

2007-01-01T23:59:59.000Z

471

Paddling Mode of Forward Flight in Insects Leif Ristroph,1  

E-Print Network [OSTI]

by oscillating their hydro- or air-foil appendages up-and- down [4,5]. For forward flight in insects, previous swimmers including ciliated micro-organisms [2], semiaquatic birds and mammals [12], as well as fish

Cohen, Itai

472

Quantitative characterization of polymer scratch behavior using a standardized scratch test  

E-Print Network [OSTI]

the rigors of consumption. To illustrate, the automotive industry saw the positive aspects of making interior and exterior car parts from polymeric materials. These parts can be made inexpensively from materials such as polypropylene (PP). A plastic... bumper will be easier and cheaper to repair or replace than a metal one that has been dented or corroded. In addition, the low density of polymers will ultimately make the car lighter and more aerodynamic. Therefore, the automotive industry has set...

Browning, Robert Lee

2007-09-17T23:59:59.000Z

473

Texas Rice, Volume VII, Number 1  

E-Print Network [OSTI]

decade ago, J. Neil Rutger, retired Chief Scientist at the Bumpers Center, contributed to the change by initiating a base- broadening program to develop im- proved indica germplasm adapted to the U.S. By the mid-1990s exciting yield increases had... growers, so they may increase productivity and profitability on their farms. continued on next page Texas rice is attacked by three species of stem borers—sugarcane borer (SCB), Diatraea sacchara- lis; Mexican rice borer (MRB), Eoreuma loftini; and rice...

474

Flux Conversion and Evidence of Relaxation in a High-Plasma Formed by High-Speed Injection into a Mirror Confinement Structure  

E-Print Network [OSTI]

field pinches and in spheromaks, but have #12; 0 (zero pres- sure). However, since most plasmas have Speromak Experiment [6], which used the counterhelicity spheromak merging for- mation method. Either a spheromak or an FRC could be formed depending on the helicity ratio of the two initial spheromaks

Washington at Seattle, University of

475

3-D Tracking of Shoes for Virtual Mirror Applications Proc. IEEE Conf. on Computer Vision and Pattern Recognition, Anchorage, Alaska, June 2008.  

E-Print Network [OSTI]

and Pattern Recognition, Anchorage, Alaska, June 2008. P. Eisert, P. Fechteler, J. Rurainsky Fraunhofer Institute for Telecommunications, Heinrich-Hertz-Institute Einsteinufer 37, D-10587 Berlin, Germany peter.eisert@hhi.fraunhofer in two stores, one at the Champs Elys´ees, Paris, the other in Lille, France. At their innovation center

Eisert, Peter

476

March 31, 2008 15:11 WSPC -Proceedings Trim Size: 9in x 6in mirrorstat Mirror modes observed with Cluster in the Earth's  

E-Print Network [OSTI]

events with solar wind parameters and Interplanetary Magnetic Field (IMF) orientation. We notably reveal ubiquitousness : in environments of the Earth,1,2 Jupiter,4­6 Saturn,7 Io wake,8 the comet Halley,9 solar wind,10 with Cluster in the Earth's magnetosheath : statistical study and IMF/solar wind dependence V. G´enot*, E

Paris-Sud XI, Université de

477

Critical considerations of pupil alignment to achieve open-loop control of MEMS deformable mirror in non-linear laser scanning fluorescence  

E-Print Network [OSTI]

mechanism of the MEMS DM, a high resolution CMOS camera and a compact Shack-Hartmann wavefront sensor-Hartmann wavefront sensor 1. INTRODUCTION Nonlinear fluorescence microscopic imaging, with its unique advantages of intrinsic three dimensional optical sectioning ability, deep tissue penetration, and reduced photo

478

In Adaptive Optical System Technologies, Bonnaccini & Tyson, eds., Proc. SPIE 3353, Kona, HI, March 1998. Fast Phase Diversity Wavefront Sensing for Mirror Control  

E-Print Network [OSTI]

, such as with solar telescopes, wavefront sensors operating on extended objects are needed. In recent years, the most solar fine structure. For SH wavefront sensors, calibration of the relative positions of the SH sub common wavefront sensors for AO systems have been Shack--Hartmann (SH) wavefront sensors and curvature

Löfdahl, Mats

479

Mirror Fusion Test Facility-B (MFTF-B) axicell configuration: NbTi magnet system. Manufacturing/producibility final report. Volume 2  

SciTech Connect (OSTI)

This Final MFTF-B Manufacturing/Producibility Report covers facilities, tooling plan, manufacturing sequence, schedule and performance, producibility, and lessons learned for the solenoid, axicell, and transition coils, as well as a deactivation plan, conclusions, references, and appendices.

Ritschel, A.J.; White, W.L.

1985-05-01T23:59:59.000Z

480

Stellar reaction rate for (22)Mg + p -> (23)Al from the asymptotic normalization coefficient in the mirror nuclear system (22)Ne + n -> (23)Ne  

E-Print Network [OSTI]

The production of (22)Na in ONe novae can be influenced by the (22)Mg(p,gamma)(23)Al reaction. To investigate this reaction rate at stellar energies, we have determined the asymptotic normalization coefficient (ANC) for (22)Mg + p -> (23)Al through...

Al-Abdullah, T.; Carstoiu, F.; Chen, X.; Clark, H. L.; Fu, C.; Gagliardi, Carl A.; Lui, Y. -W; Mukhamedzhanov, A.; Tabacaru, G.; Tokimoto, Y.; Trache, L.; Tribble, Robert E.

2010-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "appendages mirrors bumpers" 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

ORNL/TM-2008/151 [Cover page margins: 1 in. all around with a gutter of 0.25 in., mirror margins, no page number  

E-Print Network [OSTI]

, no page number] Compendium: Surveys Evaluating Knowledge and Opinions of Hydrogen and Fuel Cell and Transportation Science Division COMPENDIUM: SURVEYS EVALUATING KNOWLEDGE AND OPINIONS OF HYDROGEN AND FUEL CELL

482

High field Nb/sub 3/Sn Axicell insert coils for the Mirror Fusion Test Facility-B (MFTF-B) axicell configuration. Final report  

SciTech Connect (OSTI)

Two 12-tesla superconducting insert coils are being designed by General Dynamics Convair Division for the axicell regions of MFTF-B for Lawrence Livermore National Laboratory. A major challenge of this project is to ensure that combined fabrication and operational strains induced in the conductor are within stringent limitations of the relatively brittle Nb/sub 3/Sn superconductor filaments. These coils are located in the axicell region of MFTF-B. They have a clear-bore diameter of 36.195cm (14.25 inches) and consist of 27 double pancakes (i.e., 54 pancakes per coil) would on an electrically insulated 304LN stainless steel/bobbin helium vessel. Each pancake has 57 turns separated by G-10CR insulation. The complete winding bundle has 4.6 million ampere-turns and uniform current density of 2007 A/cm/sup 2/. In conjunction with the other magnets in the system, they produce a 12-tesla central field and a 12.52-tesla peak field. A multifilamentary Nb/sub 3/Sn conductor was selected to meet these requirements. The conductor consists of a monolithic insert soldered into a copper stabilizer. Sufficient cross-sectional area and work-hardening of the copper stabilizer has been provided for the conductor to self-react the electromagnetic Lorentz force induced hoop stresses with normal operational tensile strains less than 0.07 percent.

Baldi, R.W.; Tatro, R.E.; Scanlan, R.M.; Agarwal, K.L.; Bailey, R.E.; Burgeson, J.E.; Kim, I.K.; Magnuson, G.D.; Mallett, B.D.; Pickering, J.L.

1984-03-01T23:59:59.000Z

483

Russian Scientists Team with NREL on Innovative Weathering System...  

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

Technology invented the UV-only mirrors, designed and built the mirror array in Russia, and delivered the prototype UAWS to NREL. In 2008, Vladimir Kiselev was instrumental...

484

Fiber delivered probe for efficient CARS imaging of tissues  

E-Print Network [OSTI]

probe based on microelectromechanical system mirror forbased on a microelectromechanical systems scanning mirror,”based on a microelectromechanical systems two-dimensional

Balu, Mihaela; Liu, Gangjun; Chen, Zhongping; Tromberg, Bruce J; Potma, Eric O

2010-01-01T23:59:59.000Z

485

Lawrence Uvermore Laboratory THE TECHNOLOGY OF HIRROR MACHINES...  

Office of Scientific and Technical Information (OSTI)

weaker, centrally- located mirror cell. The second facility, HFTF (Mirror Fusion Test Facility), is currently in preliminary design with line Item approval anticipated for...

486

A new carcinosomatid eurypterid from the Siluro-Devonian of northern Vietnam  

E-Print Network [OSTI]

and distal podomeres of one appendage VI, entire opisthosoma and telson (Text-figs 3A, 4), although most of the postabdomen and telson are preserved on a separate piece (Text-figs 3D, 4). Coxa of appendage V 5-4 mm long. Podomere 2, 4-1 mm long. Podomere 3..., 4-4 mm long. Appendage VI entire. Coxa 24 mm long, 16 mm wide, convex posterior margin. Podomere 2 oval, 5-1 mm long, 9-7 mm wide. Podomere 3 narrow, 1-3 mm long, 9-3 mm wide. Podomere 4 narrow, wedge-shaped, anterior length 3-5 mm, width 8-5mm...

Selden, Paul A.; Truong, Doan Nhat

2002-01-01T23:59:59.000Z

487

REPORT OF THE SURFACE SCIENCE WORKSHOP  

E-Print Network [OSTI]

Hydrogen containment vessel analysis. Fracture analysis. Sputter deposition for mirrors, photovoltaic

Somorjai, G.A.

2010-01-01T23:59:59.000Z

488

The Nearby Supernova Factory Ozone + Aerosol + Rayleigh  

E-Print Network [OSTI]

Rayleigh + Aerosol Extinction monitor filter Auxiliary Camera CCD Spectrograph picko ff mirror Umbra

489

RSIR E S E A R C H S U P P O R T  

E-Print Network [OSTI]

& Lyot stops ­ Two scan mirrors (N/S & E/W) · Spectral bands: ­ 6 solar-reflective channels (visible, NIR Cassegrain telescope with central obscuration & spider ­ Single 2-axis scan mirror ­ Scan mirror reflection angle varies with E/W angle­ Scan mirror reflection angle varies with E/W angle . · Imager's spectral

Kuligowski, Bob

490

Measuring the Solar Diameter with a Michelson Radio Interferometer 1. Scientific Background  

E-Print Network [OSTI]

3, M4, mirrors; a, 100-inch paraboloidal primary mirror; b convex secondary mirror; c, coud´e flatMeasuring the Solar Diameter with a Michelson Radio Interferometer 1. Scientific Background pick-off mirror; d, focus. Figures from Michelson & Pease (1921). A work-around the diffraction

Metchev, Stanimir

491

CFRC OBSERVATIONS INTRODUCTION  

E-Print Network [OSTI]

the panelists. Student projects mirrored some of these approaches and included the following: Microhydro

Heller, Barbara

492

A Review of "New World Gold: Cultural Anxiety and Monetary Disorder in Early Modern Spain" by Elvira Vilches  

E-Print Network [OSTI]

) and the Dominican Tom?s Mercado?s Suma de tratos y contratos (Guide to negotiations and contracts, 1569). Not unlike the bumper crop of books on personal finance that have ap- peared since our own economic meltdown of 2008, the proliferation of such texts... of Columbus?s travel log or Cort?s?s ?Letters from Mexico.? Whether read in parts or as a whole, Vilches?s book offers the reader a layered and insightful examination of early modern Spain?s ?Golden Age,? attune to all the contradictions that follow from...

Wright, Elizabeth R.

2011-01-01T23:59:59.000Z

493

Otvoren implementcia architektry Agent-Space  

E-Print Network [OSTI]

prejavy sú dané aktivovaním správnej sady agentov v správnom case image ball left/right Turn left direction ball interpolated ball recognizer interpolator left/right left/right #12;8 agent agent space blok zábran pridáva a odobera agentov, i takých ktorí ovládajú tie isté aktuátory robota. bumper right wheel

Lucny, Andrej

494

Genetic basis of eye and pigment loss in the cave crustacean, Asellus aquaticus  

E-Print Network [OSTI]

Genetic basis of eye and pigment loss in the cave crustacean, Asellus aquaticus Meredith E. Protasa and the loss of eyes and pigmentation, have evolved multiple times in a diverse assemblage of cave animals to be involved in pigmen- tation, eye, and appendage development, was used to identify loci of large effect

Patel, Nipam H.

495

Developmental Cell Three-Dimensional Epithelial Morphogenesis  

E-Print Network [OSTI]

@princeton.edu http://dx.doi.org/10.1016/j.devcel.2013.01.017 SUMMARY Morphogenesis of the respiratory appendages on eggshells of Drosophila species provides a powerful experimental system for studying how cell sheets give changes in morphology. Computational modeling shows that this mechanism could explain the main features

Shvartsman, Stanislav "Stas"

496

MassLive.com's Printer-Friendly Page http://www.masslive.com/printer/printer.ssf?/base/living-0/1120830322... 1 of 2 7/8/2005 11:09 AM  

E-Print Network [OSTI]

geobacters, produces wire-like appendages that can conduct electricity. These "nanowires" are incredibly fine billions of geobacters, so this might be a convenient way to produce a lot of tiny electrical structures that pili were good conductors of electricity. Furthermore, when geobacters were genetically modified

Lovley, Derek

497

Can direct extracellular electron transfer occur in the absence of outer membrane cytochromes in Desulfovibrio vulgaris?  

SciTech Connect (OSTI)

Extracellular electron transfer has been investigated over several decades via forms of soluble electron transfer proteins that are exported for extracellular reoxidation. More recently, several organisms have been shown to reduce extracellular metals via the direct transfer of electron through appendages; also known as nanowires. They have been reported most predominantly in Shewanella and Geobacter. While the relevancy and composition of these structures in each genus has been debated, both possess outer membrane cytochrome complexes that could theoretically come into direct contact with solid phase oxidized metals. Members of the genus Desulfovibrio apparently have no such cytochromes although similar appendages are present, are electrically conductive, and are different from flagella. Upon U(VI)-reduction, the structures in Desulfovibrio become coated with U(IV). Deletion of flagellar genes did not alter soluble or amorphous Fe(III) or U(VI) reduction, or appendage appearance. Removal of the chromosomal pilA gene hampered amorphous Fe(III)-reduction by ca. 25%, but cells lacking the native plasmid, pDV1, reduced soluble Fe(III) and U(VI) at ca. 50% of the wild type rate while amorphous Fe(III)-reduction slowed to ca. 20% of the wild type rate. Appendages were present in all deletions as well as pDV1, except pilA. Gene complementation restored all activities and morphologies to wild type levels. This suggests that pilA encodes the structural component, whereas genes within pDV1 may provide the reactive members. How such appendages function without outer membrane cytochromes is under investigation.

Elias, Dwayne A [ORNL] [ORNL; Zane, Mr. Grant M. [University of Missouri, Columbia] [University of Missouri, Columbia; Auer, Dr. Manfred [Lawrence Berkeley National Laboratory (LBNL)] [Lawrence Berkeley National Laboratory (LBNL); Fields, Dr. Matthew Wayne [Montana State University] [Montana State University; Wall, Judy D. [University of Missouri] [University of Missouri; Gorby, Dr. Yuri A. [J. Craig Venter Institute] [J. Craig Venter Institute

2010-01-01T23:59:59.000Z

498

Concentration solar power optimization system and method of using the same  

DOE Patents [OSTI]

A system and method for optimizing at least one mirror of at least one CSP system is provided. The system has a screen for displaying light patterns for reflection by the mirror, a camera for receiving a reflection of the light patterns from the mirror, and a solar characterization tool. The solar characterization tool has a characterizing unit for determining at least one mirror parameter of the mirror based on an initial position of the camera and the screen, and a refinement unit for refining the determined parameter(s) based on an adjusted position of the camera and screen whereby the mirror is characterized. The system may also be provided with a solar alignment tool for comparing at least one mirror parameter of the mirror to a design geometry whereby an alignment error is defined, and at least one alignment unit for adjusting the mirror to reduce the alignment error.

Andraka, Charles E

2014-03-18T23:59:59.000Z

499

Autonomous mobile robot for radiologic surveys  

DOE Patents [OSTI]

An apparatus for conducting radiologic surveys. The apparatus comprises in the main a robot capable of following a preprogrammed path through an area, a radiation monitor adapted to receive input from a radiation detector assembly, ultrasonic transducers for navigation and collision avoidance, and an on-board computer system including an integrator for interfacing the radiation monitor and the robot. Front and rear bumpers are attached to the robot by bumper mounts. The robot may be equipped with memory boards for the collection and storage of radiation survey information. The on-board computer system is connected to a remote host computer via a UHF radio link. The apparatus is powered by a rechargeable 24-volt DC battery, and is stored at a docking station when not in use and/or for recharging. A remote host computer contains a stored database defining paths between points in the area where the robot is to operate, including but not limited to the locations of walls, doors, stationary furniture and equipment, and sonic markers if used. When a program consisting of a series of paths is downloaded to the on-board computer system, the robot conducts a floor survey autonomously at any preselected rate. When the radiation monitor detects contamination, the robot resurveys the area at reduced speed and resumes its preprogrammed path if the contamination is not confirmed. If the contamination is confirmed, the robot stops and sounds an alarm.

Dudar, Aed M. (Augusta, GA); Wagner, David G. (Augusta, GA); Teese, Gregory D. (Aiken, SC)

1994-01-01T23:59:59.000Z

500

Autonomous mobile robot for radiologic surveys  

DOE Patents [OSTI]

An apparatus is described for conducting radiologic surveys. The apparatus comprises in the main a robot capable of following a preprogrammed path through an area, a radiation monitor adapted to receive input from a radiation detector assembly, ultrasonic transducers for navigation and collision avoidance, and an on-board computer system including an integrator for interfacing the radiation monitor and the robot. Front and rear bumpers are attached to the robot by bumper mounts. The robot may be equipped with memory boards for the collection and storage of radiation survey information. The on-board computer system is connected to a remote host computer via a UHF radio link. The apparatus is powered by a rechargeable 24-volt DC battery, and is stored at a docking station when not in use and/or for recharging. A remote host computer contains a stored database defining paths between points in the area where the robot is to operate, including but not limited to the locations of walls, doors, stationary furniture and equipment, and sonic markers if used. When a program consisting of a series of paths is downloaded to the on-board computer system, the robot conducts a floor survey autonomously at any preselected rate. When the radiation monitor detects contamination, the robot resurveys the area at reduced speed and resumes its preprogrammed path if the contamination is not confirmed. If the contamination is confirmed, the robot stops and sounds an alarm. 5 figures.

Dudar, A.M.; Wagner, D.G.; Teese, G.D.

1994-06-28T23:59:59.000Z