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Note: This page contains sample records for the topic "appendages mirrors bumpers" from the National Library of EnergyBeta (NLEBeta).
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We encourage you to perform a real-time search of NLEBeta
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1

Bumper wall for plasma device  

DOE Patents (OSTI)

Operation of a plasma device such as a reactor for controlled thermonuclear fusion is facilitated by an improved bumper wall enclosing the plasma to smooth the flow of energy from the plasma as the energy impinges upon the bumper wall. The bumper wall is flexible to withstand unequal and severe thermal shocks and it is readily replaced at less expense than the cost of replacing structural material in the first wall and blanket that surround it.

Coultas, Thomas A. (Hinsdale, IL)

1977-01-01T23:59:59.000Z

2

Switchable Mirrors  

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

Switchable Mirrors Switchable Mirrors Speaker(s): Ronald Griessen Date: July 17, 2002 - 12:00pm Location: Bldg. 90 Seminar Host/Point of Contact: Thomas Richardson Switchable mirrors based on rare earth hydrides were discovered in my laboratory in 1994. PhD student J.N. Huiberts observed a reversible metal-to-insulator transition when a thin film (150 to 500 nm) of yttrium or lanthanum coated with a thin layer of palladium was exposed to hydrogen gas. The transition accompanies conversion of a metallic dihydride phase to a semiconducting trihydride. Since then, our group has carried out fundamental research that has elucidated many important aspects of switchable mirror phenomena. This talk will include demonstrations of the spectacular changes in optical properties in rare earth hydride films, and

3

Design and simulation of fast pulsed kicker/bumper units for the positron accumulator ring at APS  

Science Conference Proceedings (OSTI)

In the design of fast pulsed kicker/bumper units for a positron accumulator ring (PAR) at APS, different pulse forming networks (PFN) are considered and different structures for the magnet are studied and simulated. This paper describes some design considerations and computer simulation results of different designs. 4 refs., 6 figs.

Wang, J.; Volk, G.J.

1991-01-01T23:59:59.000Z

4

New electrochromic mirror systems  

New electrochromic mirror systems ... recorded using a fiber optic spectrometer (Ocean Optics). ... transmittance modulation of infrared light could lead

5

Development of mirror specifications  

DOE Green Energy (OSTI)

The work performed by PNL for Sandia Laboratories under a contract titled Survey and Analysis of Mirror Silvering Technology and Heliostat Glass Evaluation is described. The primary purpose for the work was to develop specifications that will enhance the durability and lifetime of heliostat mirrors. The contract was initiated with a technical survey of the present commercial silvered glass mirror industry and an analytical investigation of the degradation phenomena experienced by the heliostat mirrors at Sandia's Livermore test facility. The main thrust was to evaluate the present methods of silver deposition and protection in order to recommend a specification for the heliostat mirror silvering process that would extend the lifetime of the Barstow mirror field. In addition, several advanced concepts for enhancing mirror lifetime were investigated. Technical and measurement support for evaluation of the Barstow heliostat glass and updating the glass specification was also provided. (WHK)

Lind, M.A.

1979-09-01T23:59:59.000Z

6

Rf heating of mirrors  

SciTech Connect

A brief overview is presented of potential uses for rf heating of plasmas in mirror devices. While some discussion relating to past experiments is given, the main emphasis is devoted to a review of potential experiments in presently existing devices, and devices under construction or planning. Some predictions are made for plasmas in mirror reactors.

Porkolab, M.

1980-04-09T23:59:59.000Z

7

Tandem mirror plasma confinement apparatus  

DOE Patents (OSTI)

Apparatus and method for confining a plasma in a center mirror cell by use of two end mirror cells as positively charged end stoppers to minimize leakage of positive particles from the ends of the center mirror cell.

Fowler, T. Kenneth (Walnut Creek, CA)

1978-11-14T23:59:59.000Z

8

Lithium-Based Electrochromic Mirrors  

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

Lithium-Based Electrochromic Mirrors Title Lithium-Based Electrochromic Mirrors Publication Type Conference Paper LBNL Report Number LBNL-52870 Year of Publication 2003 Authors...

9

Mirror plasma apparatus  

DOE Patents (OSTI)

A mirror plasma apparatus which utilizes shielding by arc discharge to form a blanket plasma and lithium walls to reduce neutron damage to the wall of the apparatus. An embodiment involves a rotating liquid lithium blanket for a tandem mirror plasma apparatus wherein the first wall of the central mirror cell is made of liquid lithium which is spun with angular velocity great enough to keep the liquid lithium against the first material wall, a blanket plasma preventing the lithium vapor from contaminating the plasma.

Moir, Ralph W. (Livermore, CA)

1981-01-01T23:59:59.000Z

10

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

2001-01-04T23:59:59.000Z

11

Mirror fusion--fission hybrids  

SciTech Connect

The fusion-fission concept and the mirror fusion-fission hybrid program are outlined. Magnetic mirror fusion drivers and blankets for hybrid reactors are discussed. Results of system analyses are presented and a reference design is described.

Lee, J.D.

1978-05-01T23:59:59.000Z

12

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

13

Variable focal length deformable mirror  

DOE Patents (OSTI)

A variable focal length deformable mirror has an inner ring and an outer ring that simply support and push axially on opposite sides of a mirror plate. The resulting variable clamping force deforms the mirror plate to provide a parabolic mirror shape. The rings are parallel planar sections of a single paraboloid and can provide an on-axis focus, if the rings are circular, or an off-axis focus, if the rings are elliptical. The focal length of the deformable mirror can be varied by changing the variable clamping force. The deformable mirror can generally be used in any application requiring the focusing or defocusing of light, including with both coherent and incoherent light sources.

Headley, Daniel (Albuquerque, NM); Ramsey, Marc (Albuquerque, NM); Schwarz, Jens (Albuquerque, NM)

2007-06-12T23:59:59.000Z

14

Heliostat mirror survey and analysis  

DOE Green Energy (OSTI)

The mirrors used on concentrating solar systems must be able to withstand severe and sustained environmental stresses for long periods of time if they are to be economically acceptable. Little is known about how commercially produced wet process silvered second surface mirrors will withstand the test of time in solar applications. Field experience in existing systems has shown that the performance of the reflective surface varies greatly with time and is influenced to a large extent by the construction details of the mirror module. Degradation of the reflective layer has been seen that ranges from non-observable to severe. The exact mechanisms involved in the degradation process are not well understood from either the phenomenological or microanalytical points of view and are thus subject to much debate. The three chapters of this report summarize the work recently performed in three general areas that are key to understanding and ultimately controlling the degradation phenomena. These areas are: a survey of the present commercial mirroring industry, the microanalytical examination of numerous degraded and nondegraded mirrors, and an investigation of several novel techniques that might be used to extend the life of heliostat mirrors. Appendices include: (a) list of mirror manufacturers and (b) recommended specifications for second surface silvered mirrors for central receiver heliostat applications. (WHK)

Lind, M.A.; Buckwalter, C.Q.; Daniel, J.L.; Hartman, J.S.; Thomas, M.T.; Pederson, L.R.

1979-09-01T23:59:59.000Z

15

Alignment mirror mechanisms for space use  

Science Conference Proceedings (OSTI)

The paper describes an optical Alignment Mirror Mechanism (AMM), and discusses its control scheme. The mirror's angular positioning accuracy requirement is ± 0.2 arc-sec. This requires the mirror's linear positioning actuators to have a positioning accuracy ...

Bruno M. Jau; Colin M. McKinney; Robert F. Smythe; Dean Palmer

2011-03-01T23:59:59.000Z

16

Electrons and Mirror Symmetry  

SciTech Connect

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)

2007-04-04T23:59:59.000Z

17

Dielectric Coatings for IACT Mirrors  

E-Print Network (OSTI)

Imaging Atmospheric Cherenkov Telescopes for very-high energy gamma-ray astronomy need mirror with high reflectance roughly in the wavelength between 300 and 550 nm. The current standard reflective layer of such mirrors is aluminum. Being permanently exposed to the environment they show a constant degradation over the years. New and improved dielectric coatings have been developed to enhance their resistance to environmental impact and to extend their possible lifetime. In addition, these customized coatings have an increased reflectance of over 95% and are designed to significantly lower the night-sky background contribution. The development of such coatings for mirrors with areas up to 2 m2 and low application temperatures to suite the composite materials used for the new mirror susbtrates of the Cherenkov Telescope Array (CTA) and the results of extensive durability tests are presented.

Förster, A; Chadwick, P; Held, M

2013-01-01T23:59:59.000Z

18

Alpha Channeling in Mirror Machines  

SciTech Connect

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

19

Mirror Advanced Reactor Study (MARS)  

DOE Green Energy (OSTI)

Progress in a two year study of a 1200 MWe commercial tandem mirror reactor (MARS - Mirror Advanced Reactor Study) has reached the point where major reactor system technologies are identified. New design features of the magnets, blankets, plug heating systems and direct converter are described. With the innovation of radial drift pumping to maintain low plug density, reactor recirculating power fraction is reduced to 20%. Dominance of radial ion and impurity losses into the halo permits gridless, circular direct converters to be dramatically reduced in size. Comparisons of MARS with the Starfire tokamak design are made.

Logan, B.G.

1983-03-28T23:59:59.000Z

20

Mirror Confinement Systems: project summaries  

SciTech Connect

This report contains descriptions of the projects supported by the Mirror Confinement Systems (MCS) Division of the Office of Fusion Energy. The individual project summaries were prepared by the principal investigators, in collaboration with MCS staff office, and include objectives and milestones for each project. In addition to project summaries, statements of Division objectives and budget summaries are also provided.

1980-07-01T23:59:59.000Z

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.


21

arXiv.org help - arXiv mirror sites  

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

mirror sites arXiv mirror sites Set of flags, one for each mirror site China France Germany India Japan Spain United Kingdom USA mirror hosted by LANL Main site at Cornell...

22

Localization of atrial natriuretic peptide mRNA and immunoreactivity in the rat heart and human atrial appendage  

SciTech Connect

The localization of mRNA encoding preproatrial natriuretic peptide was investigated in tissue sections and cultures of rat heart and in sections of human right atrial appendage using the technique of in situ hybridization with /sup 32/P- and /sup 35/S-labeled RNA probes. Rat atrial natriuretic peptide (ANP) transcripts were demonstrated in numerous atrial myocytes and, to a lesser extent, in ventricular myocytes in both tissue sections and newborn rat heart cultures. These findings are consistent with those obtained by RNA blot analysis of rat heart total RNA, indicating that a single prepro-ANP transcript of approx. 900 nucleotides was present in the ventricles as well as the atria. Using a /sup 35/S-labeled RNA probe for human ANP mRNA, ANP transcripts were also localized to the majority of myocytes in the human right atrial appendage. Only background levels of autoradiographic labeling were obtained when RNA probes identical to the coding sequence of rat or human ANP mRNA were used. A close correlation was found between the distribution of ANP immunoreactivity and prepro-ANP mRNA in these preparations. These results provide unequivocal evidence for the expression of the ANP gene in the rat ventricles, as well as the atria, because myocytes in these tissues have been established as the sites of both ANP localization and precursor biosynthesis. The combined use of cardiac cultures and in situ hybridization may be of value in future studies investigating the regulation of ANP synthesis in cardiac myocytes.

Hamid, Q.; Wharton, J.; Terenghi, G.; Hassall, C.J.S.; Aimi, J.; Taylor, K.M.; Nakazato, H.; Dixon, J.E.; Burnstock, G.; Polak, J.M.

1987-10-01T23:59:59.000Z

23

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

SciTech Connect

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

24

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

25

LITHIUM-BASED ELECTROCHROMIC MIRRORS  

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

870 870 rd Presented at the 203 Meeting of the Electrochemical Society, April 28-30, 2003 in Paris, France and published in the Proceedings. Lithium-Based Electrochromic Mirrors Thomas J. Richardson and Jonathan L. Slack Lawrence Berkeley National Laboratory April 2003 This work was supported by the Assistant Secretary for Energy Efficiency and Renewable Energy, Office of Building Technology, State and Community Programs, Office of Building Research and Standards of the U.S. Department of Energy under Contract No. DE-AC03-76SF00098. LITHIUM-BASED ELECTROCHROMIC MIRRORS Thomas J. Richardson* and Jonathan L. Slack Building Technologies Department Environmental Energy Technologies Division Lawrence Berkeley National Laboratory Berkeley, California 94720, USA

26

Passivation coating for flexible substrate mirrors  

DOE Patents (OSTI)

A protective diffusion barrier for metalized mirror structures is provided by a layer of 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, light-weight, flexible substrates of metal or polymer sheets coated with glassy layers can be protected with silicon nitride according to this invention. 13 figs.

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

1988-10-19T23:59:59.000Z

27

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

28

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

29

Tandem mirror technology demonstration facility  

Science Conference Proceedings (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

30

Plasma confinement apparatus using solenoidal and mirror coils  

DOE Patents (OSTI)

A plasma confinement apparatus, wherein multiple magnetic mirror cells are linked by magnetic field lines inside of a solenoid with the mirroring regions for adjacent magnetic mirror cells each formed by a separate mirror coil inside of the solenoid. The magnetic mirror cells may be field reversed.

Fowler, T. Kenneth (Walnut Creek, CA); Condit, William C. (Livermore, CA)

1979-01-01T23:59:59.000Z

31

Concentrating Solar Power: Energy from Mirrors  

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

Mirror mirror on the wall, what's the Mirror mirror on the wall, what's the greatest energy source of all? The sun. Enough energy from the sun falls on the Earth everyday to power our homes and businesses for almost 30 years. Yet we've only just begun to tap its potential. You may have heard about solar electric power to light homes or solar thermal power used to heat water, but did you know there is such a thing as solar thermal-electric power? Electric utility companies are using mirrors to concentrate heat from the sun to produce environmentally friendly electricity for cities, especially in the southwestern United States. The southwestern United States is focus- ing on concentrating solar energy because it's one of the world's best areas for sun- light. The Southwest receives up to twice the sunlight as other regions in the coun-

32

Design studies of mirror machine reactors  

SciTech Connect

An overview is presented of a mirror fusion reactor design study. The general methodology used in the study is discussed, the reactor is described, and some design alternatives to the present approach are enumerated. The system chosen for this design study is a mirror machine with direct conversion using D- T fuel. The nominal power output is 200 MW. The coil geometry is the Yin Yang, minimum B with a vacuum mirror ratio of 3. The coil is of particular utility because of its simple conductor shapes and because the two separate conductors, by proper B-field biasing, allow the charged particles to escape preferentially through one mirror only and through a relatively small window'' of that mirror. This is necessary for direct converter economy. (auth)

Werner, R.W.; Carlson, G.A.; Hovingh, J.; Lee, J.D.; Peterson, M.A.

1973-12-01T23:59:59.000Z

33

Mirror Modes in the Heliosheath  

SciTech Connect

Mirror mode (MM) structures are identified in the Voyager 1 heliosheath magnetic field data. Their characteristics are: (1) quasiperiodic structures with a typical scale size of {approx}57 {rho}{sub p}(proton gyroradii), (2) little or no angular changes across the structures ({approx}3 deg. longitude and {approx}3 deg. latitude), and (3) a lack of sharp boundaries at the magnetic dip edges. It is proposed that the pickup of interstellar neutrals in the upstream region of the termination shock (TS) is the likely cause of MM instability during intervals when the IMF is nearly orthogonal to the solar wind flow direction. Concomitant (quasiperpendicular) shock compression of the MM structures at the TS and additional injection of pickup ions (PUIs) throughout the heliosheath will enhance MM growth.

Tsurutani, B. T. [Jet Propulsion Lab., Calif. Inst. Tech., Pasadena, CA (United States); Guarnieri, F. L. [UNIVAP, Sao Jose dos Campos, SP (Brazil); Echer, E. E. [INPE, Sao Jose dos Campos, SP (Brazil); Lakhina, G. S. [Indian Institute of Geomagnetism, Navi Mumbai (India); Verkhoglyadova, O. P. [CSPAR, Univ. Alabama, Huntsville, AL (United States)

2011-01-04T23:59:59.000Z

34

TRANSPARENT HEAT MIRRORS FOR PASSIVE SOLAR HEATING APPLICATIONS  

E-Print Network (OSTI)

for Passive Passive Solar Heating Applications StephenHEAT MIRRORS FOR PASSIVE SOLAR HEATING APPLICATIONS StephenMIRRORS FOR PASSIVE SOLAR HEATING APPLICATIONS Stephen

Selkowitz, S.

2011-01-01T23:59:59.000Z

35

Present status of mirror stability theory  

SciTech Connect

A status report of microinstability as it applies to 2XIIB and MX theory for mirror machines is presented. It is shown that quasilinear computations reproduce many of the parameters observed in the 2XIIB experiment. In regard to large mirror machines, there are presented detailed calculations of the linear theory of the drift cyclotron loss-cone mode, with inhomogeneous geometry and nonlinear diffusive effects. Further, the stability of a mirror machine to the Alfven ion-cyclotron instability is assessed, and the Baldwin- Callen diffusion is estimated for a spatially varying plasma. (auth)

Baldwin, D. E.; Berk, H. L.; Byers, J. A.

1976-02-11T23:59:59.000Z

36

Neutron diagnostics for mirror hybrids  

SciTech Connect

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

37

Mirror Advanced Reactor Study interim design report  

DOE Green Energy (OSTI)

The status of the design of a tenth-of-a-kind commercial tandem-mirror fusion reactor is described at the midpoint of a two-year study. When completed, the design is to serve as a strategic goal for the mirror fusion program. The main objectives of the Mirror Advanced Reactor Study (MARS) are: (1) to design an attractive tandem-mirror fusion reactor producing electricity and synfuels (in alternate versions), (2) to identify key development and technology needs, and (3) to exploit the potential of fusion for safety, low activation, and simple disposal of radioactive waste. In the first year we have emphasized physics and engineering of the central cell and physics of the end cell. Design optimization and trade studies are continuing, and we expect additional modifications in the end cells to further improve the performance of the final design.

Not Available

1983-04-01T23:59:59.000Z

38

Conformance and mirroring for timed asychronous circuits  

Science Conference Proceedings (OSTI)

Conformance has been used as a correctness criterion for asynchronous circuits. In the case of untimed systems, conformance of an implementation to a specification is equivalent to the failure-freeness between the implementation and the mirror of the ...

Bin Zhou; Tomohiro Yoneda; Bernd-Holger Schlingloff

2001-01-01T23:59:59.000Z

39

LLNL-TR-408176 The Axisymmetric Tandem Mirror: A  

E-Print Network (OSTI)

LLNL-TR-408176 The Axisymmetric Tandem Mirror: A Magnetic Mirror Concept Game Changer Magnet Mirror of Magnetic Mirror Status #12;Berkeley Workshop Participants Others Interested David Baldwin, LLNL/GA Rick, LLNL George Miley, U. Illinois Ron Cohen, LLNL Gary Porter, LLNL Don Correll, LLNL John Santarius, U

40

Motorized control for mirror mount apparatus  

DOE Patents (OSTI)

A motorized control and automatic braking system for adjusting mirror mount apparatus is disclosed. The motor control includes a planetary gear arrangement to provide improved pitch adjustment capability while permitting a small packaged design. The motor control for mirror mount adjustment is suitable for laser beam propagation applications. The brake is a system of constant contact, floating detents which engage the planetary gear at selected between-teeth increments to stop rotation instantaneously when the drive motor stops.

Cutburth, Ronald W. (Tracy, CA)

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.


41

Rigid laser mirror mount and protection assembly  

SciTech Connect

A mounting assembly for supporting a Brewster window and mirror to intercept a laser beam at the end of a gas laser envelope includes an elongated tubular member having one end opening into the gas laser envelope and an opposite end closed by the Brewster window. A rigid housing supporting the mirror is joined to the tubular member close to the end having the Brewster window by a flexible sealed joint that permits limited movement of the housing relative to the tubular member generally along the length of the tubular member while inhibiting flow of contaminants from the exterior into the passage formed by the rigid housing between the Brewster window and mirror. A seal is placed between the rigid housing and mirror to inhibit flow of such contaminants into the passage from the mirror location. A mounting structure joins the rigid housing to the gas laser envelope to secure them together and includes an adjustment mechanism that permits the housing to be moved relative to the envelope for adjusting the angular orientation of the supported mirror relative to the intercepted laser beam.

Mohler, G.E.

1984-03-27T23:59:59.000Z

42

Advances in Tandem Mirror fusion power reactors  

DOE Green Energy (OSTI)

The Tandem Mirror exhibits several distinctive features which make the reactor embodiment of the principle very attractive: Simple low-technology linear central cell; steady-state operation; high-..beta.. operation; no driven current or disruptions; divertorless operation; direction conversion of end-loss power; low-surface heat loads; and advanced fusion fuel capability. In this paper, we examine these features in connection with two tandem mirror reactor designs, MARS and MINIMARS, and several advanced reactor concepts including the wall-stabilized reactor and the field-reversed mirror. With a novel compact end plug scheme employing octopole stabilization, MINIMARS is expressly designed for short construction times, factory-built modules, and a small (600 MWe) but economic reactor size. We have also configured the design for low radioactive afterheat and inherent/passive safety under LOCA/LOFA conditions, thereby obviating the need for expensive engineered safety systems. In contrast to the complex and expensive double-quadrupole end-cell of the MARS reactor, the compact octopole end-cell of MINIMARS enables ignition to be achieved with much shorter central cell lengths and considerably improves the economy of scale for small (approx.250 to 600 MWe) tandem mirror reactors. Finally, we examine the prospects for realizing the ultimate potential of the tandem mirror with regard to both innovative configurations and novel neutron energy conversion schemes, and stress that advanced fuel applications could exploit its unique reactor features.

Perkins, L.J.; Logan, B.G.

1986-05-20T23:59:59.000Z

43

Tandem-mirror program: status and projection  

SciTech Connect

Construction of MFTF-B is scheduled for completion in 1985. Results of experiments in TMX-U and MFTF-B will permit the design of the D-T burning tandem-mirror next-step facility (TMNS) in which physics issues will not be at issue. TMNS will be a facility for engineering research and development. The end cells of TMNS are expected to be appropriate for a tandem-mirror demonstration fusion reactor (TMR), construction of which should begin about 1986 for operation in the 1990's.

Van Atta, C.M.

1981-03-12T23:59:59.000Z

44

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

45

Ultra-Thin Highly Deformable Composite Mirrors John Steeves  

E-Print Network (OSTI)

primary mirrors consisting of a silicon carbide structure supporting a precision optical face-sheet, whose-thin carbon-fiber shell bonded to a piezo-ceramic active layer coated with patterned electrodes. Mirrors based

Pellegrino, Sergio

46

Edge diagnostics for tandem mirror machines  

SciTech Connect

The edge plasma in a tandem mirror machine shields the plasma core from cold neutral gas and impurities. A variety of diagnostics are used to measure the fueling, shielding, and confinement of the edge plasma in both the end plug and central cell regions. Fast ion gauges and residual gas analyzers measure the gas pressure and composition outside of the plasma. An array of Langmuir probes is used to measure the electron density and temperature. Extreme ultraviolet (euv) and visible spectroscopy are used to measure both the impurity and deuterium densities and to estimate the shielding factor for the core plasma. The linear geometry of a tandem mirror also allows direct measurements of the edge plasma by sampling the ions and electrons lost but the ends of the machine. Representative data obtained by these diagnostics during operation of the Tandem Mirror Experiment (TMX) and Tandem Mirror Experiment-Upgrade (TMX-U) experiments are presented. Diagnostics that are currently being developed to diagnose the edge plasma are also discussed.

Allen, S.L.

1984-09-14T23:59:59.000Z

47

An Intelligent Chilled Mirror Humidity Instrument  

Science Conference Proceedings (OSTI)

An intelligent, chilled mirror humidity instrument has been designed for use on buoys and ships. Our design goal is for the instrument to make high-quality dewpoint temperature measurements for a period of up to one year from an unattended ...

David S. Hosom; Gennaro H. Crescenti; Clifford L. Winget; Sumner Weisman; Donald P. Doucet; James F. Price

1991-08-01T23:59:59.000Z

48

LLNL-PRES-407935 Mirror Status Workshop  

E-Print Network (OSTI)

LLNL-PRES-407935 Mirror Status Workshop September 8-9, 2008 Lawrence Berkeley National Laboratory; #12; #12; #12;LLNL-PRES-406923 Comments-9 September 2008 R. F. Post, LLNL MW08-01 #12;The Kinetic Stabilizer concept allows the use of axisymmetric

49

Blackbody radiation drag on a relativistically moving mirror  

E-Print Network (OSTI)

We compute the drag force on a mirror moving at relativistic velocity relative to blackbody radiation background.

N. R. Balasanyan; V. E. Mkrtchian

2009-07-14T23:59:59.000Z

50

Verifying Mirror Technology for NGST with a Space-Qualified, Cryogenic 3.5 M Mirror  

E-Print Network (OSTI)

The lightweighting and surface accuracy targeted for NGST's 8 m primary mirror has been demonstrated in a 0.5 m prototype. Now a second, 2 m prototype weighing 40 kg in total is being fabricated at the University of Arizona under the NGST NMSD program. It will be tested in cryogenic operation in spring 1999. A third, advanced mirror system demonstrator (AMSD) is needed, the full size of an NGST segment, for flight qualification, including launch survival and extremely high reliability. The 3.5 m mirror, 1/6 the weight of HST's primary, would be made with a 2 mm thick glass face-sheet attached by adjustable screws to a carbon composite support. It would be figured as a fast telescope primary, and fully tested cryogenically to verify closed loop figure stability with simulated infrared starlight. If started in early 1999, this could be completed in 2001. Construction of the NGST mirror panels could then be undertaken on the basis of proven technology, and in time for a 2007 launch. With a diameter of 3.5 m and a weight of only 140 kg, the mirror could be incorporated into a telescope and launched to a high orbit by the Shuttle or number of other vehicles. Such a space mission would complement those already planned for scaled down tests of the unfolding of the NGST mirror segments (NEXUS) and the sunshade (ISIS). Much would be learned by running the mirror at cryogenic temperature, with a new infrared array to make preliminary observations in the 2 - 4 microns dark sky window, and a CCD to check optical image quality. This mission would be independent of the NGST, but would lay the scientific groundwork for the much more powerful telescope, as well as giving practical experience of mirror operation.

Roger Angel; Jim Burge

1998-08-11T23:59:59.000Z

51

Method for making mirrored surfaces comprising superconducting material  

DOE Patents (OSTI)

Superconducting mirror surfaces are provided by forming a mirror surface from a material which is superconductive at a temperature above about 40 K and adjusting the temperature of the surface to that temperature at which the material is superconducting. The mirror surfaces are essentially perfect reflectors for electromagnetic radiation with photon energy less than the superconducting band gap.

Early, J.T.; Hargrove, R.S.

1989-12-12T23:59:59.000Z

52

Mirrors for synchrotron-radiation beamlines  

Science Conference Proceedings (OSTI)

The authors consider the role of mirrors in synchrotron-radiation beamlines and discuss the optical considerations involved in their design. They discuss toroidal, spherical, elliptical, and paraboloidal mirrors in detail with particular attention to their aberration properties. They give a treatment of the sine condition and describe its role in correcting the coma of axisymmetric systems. They show in detail how coma is inevitable in single-reflection, grazing-incidence systems but correctable in two-reflection systems such as those of the Wolter type. In an appendix, they give the theory of point aberrations of reflectors of a general shape and discuss the question of correct naming of aberrations. In particular, a strict definition of coma is required if attempts at correction are to be based on the sine condition.

Howells, M.R.

1993-09-01T23:59:59.000Z

53

Applying Alpha-Channeling to Mirror Machines  

SciTech Connect

The ?-channeling effect entails the use of radio-frequency waves to expel and cool high-energetic ?- particles born in a fusion reactor; the device reactivity can then be increased even further by redirecting the extracted energy to fuel ions. Originally proposed for tokamaks, this technique has also been shown to benefi t open-ended fusion devices. Here, the fundamental theory and practical aspects of ?- channeling in mirror machines are reviewed, including the influence of magnetic field inhomogeneity and the effect of a finite wave region on the ?-channeling mechanism. For practical implementation of the ? -channeling effect in mirror geometry, suitable contained weakly-damped modes are identifi ed. In addition, the parameter space of candidate waves for implementing the ? -channeling effect can be signi cantly extended through the introduction of a suitable minority ion species that has the catalytic effect of moderating the transfer of power from the ?-channeling wave to the fuel ions.

A.I. Zhmoginov and N.J. Fisch

2012-03-16T23:59:59.000Z

54

Fiber optics welder having movable aligning mirror  

SciTech Connect

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

55

Mirror Film Company Has 'Concentrated' Plans for Expansion | Department of  

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

Mirror Film Company Has 'Concentrated' Plans for Expansion Mirror Film Company Has 'Concentrated' Plans for Expansion Mirror Film Company Has 'Concentrated' Plans for Expansion September 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 glass mirrors makes them a great choice for focusing sunlight onto a heat generator. However, the glass mirrors can be expensive and heavy -- reducing their ability to compete with conventional energy sources. ReflecTech Inc. has an option: a silvered polymer-based film that does the same job, but with half the weight and cost. Using that film, the company can make 100,000 square feet of mirror panels per year at its factory in Arvada, Colo. Through an Advanced Manufacturing 48C tax credit through the Recovery Act,

56

Intelligent mirror monitor and controller for synchrotron radiation beam lines  

SciTech Connect

A microprocessor-based, stand-alone mirror monitor and control system has been developed for synchrotron radiation beam lines. The operational requirements for mirror position and tilt angle, including the parameters for controlling the number of steps, direction, speed and acceleration of the driving motors, may be programmed into EPROMS. The instruction sequence to carry out critical motions will be stored in a program buffer. A manual control knob is also provided to fine tune the mirror position if desired. A synchronization scheme for the height and tilt motions maintains a fixed mirror angle during insertion. Absolute height and tilt angle are displayed. Electronic (or programmable) tilt angle limits are provided to protect against damage from misalignment of high power beams such as focussed wiggler beams. A description of mirror drives with a schematic diagram is presented. Although the controller is made for mirror movers, it can be used in other applications where multiple stepping motors perform complex synchronized motions.

Xu, X.L.; Yang, J.

1983-01-01T23:59:59.000Z

57

Wave-Driven Rotation In Centrifugal Mirrors  

SciTech Connect

Centrifugal mirrors use supersonic rotation to provide axial confinement and enhanced stability. Usually the rotation is produced using electrodes, but these electrodes have limited the rotation to the Alfven critical ionization velocity, which is too slow to be useful for fusion. Instead, the rotation could be produced using radio frequency waves. A fixed azimuthal ripple is a simple and efficient wave that could produce rotation by harnessing alpha particle energy. This is an extension of the alpha channeling effect. The alpha particle power and efficiency in a simulated devices is sufficient to produce rotation without external energy input. By eliminating the need for electrodes, this opens new opportunities for centrifugal traps.

Abraham J. Fetterman and Nathaniel J. Fisch

2011-03-28T23:59:59.000Z

58

Characterizing solar mirror materials using portable reflectometers  

DOE Green Energy (OSTI)

Currently available portable instrumentation for hemispherical and specular reflectance measurements of solar mirror materials is discussed. Particular attention is given to the wavelength dependence of the measurement spectrum, which in most cases does not approximate a solar spectral distribution, and to other limitations of each instrument. Because a portable instrument is not available that can determine the solar averaged specular reflectance from a single measurement, two procedures are recommended for obtaining a reasonable estimate for this quantity using the existing portable equipment. Finally, future developments in this area are briefly discussed.

Pettit, R.B.

1982-09-01T23:59:59.000Z

59

TRANSPARENT HEAT MIRRORS FOR PASSIVE SOLAR HEATING APPLICATIONS  

E-Print Network (OSTI)

deposition rates and production costs were reviewed todiscussion of heat mirror production cost Most of our effortcoating plastic film. Production costs for coating glass

Selkowitz, S.

2011-01-01T23:59:59.000Z

60

Electrons Confined with an Axially Symmetric Magnetic Mirror Field  

Science Conference Proceedings (OSTI)

Low energy non-neutral electron plasmas were confined with an axially symmetric magnetic mirror field and an electrostatic potential to investigate the basic confinement properties of a simple magnetic mirror trap. As expected the confinement time became longer as a function of the mirror ratio. The axial electrostatic oscillations of a confined electron plasma were also observed. Obtained results suggested an improved scheme to accumulate low energy charged particles with the use of a magnetic mirror field, which would enable the investigation of electron-positron plasmas.

Higaki, H.; Ito, K.; Kira, K.; Okamoto, H. [Graduate School of Advanced Sciences of Matter, Hiroshima University 1-3-1 Kagamiyama, Higashi-Hiroshima, Hiroshima 739-8530 (Japan)

2008-08-08T23:59:59.000Z

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

Bakken formation oil and gas drilling activity mirrors development ...  

U.S. Energy Information Administration (EIA)

Data Tools & Models ... Oil production growth in the Bakken shale play mirrors somewhat the growth in natural gas production ... U.S. Department of Energy USA.gov

62

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

63

Tandem mirror reactor as a synthetic fuel producer  

DOE Green Energy (OSTI)

A scoping design is reported of a fusion reactor based on tandem mirror physics coupled to thermochemical processes for the production of hydrogen.

Werner, R.W.

1980-01-01T23:59:59.000Z

64

EUV testing of multilayer mirrors: critical issues  

DOE Green Energy (OSTI)

Recently, while performing extensive EUV irradiation endurance testing on Ru-capped multilayer mirrors in the presence of elevated partial pressures of water and hydrocarbons, NIST has observed that the amount of EUV-induced damage actually decreases with increasing levels of water vapor above {approx} 5 x 10{sup -7} Torr. It is thought that the admitted water vapor may interact with otherwise stable, condensed carbonaceous species in an UHV vacuum system to increase the background levels of simple gaseous carbon-containing molecules. Some support for this hypothesis was demonstrated by observing the mitigating effect of very small levels of simple hydrocarbons with the intentional introduction of methyl alcohol in addition to the water vapor. It was found that the damage rate decreased by at least an order of magnitude when the partial pressure of methyl alcohol was just one percent of the water partial pressure. These observations indicate that the hydrocarbon components of the vacuum environment under actual testing conditions must be characterized and controlled to 10{sup -11} Torr or better in order to quantify the damage caused by high levels of water vapor. The possible effects of exposure beam size and out-of-band radiation on mirror lifetime testing will also be discussed.

Hill, S B; Ermanoski, I; Grantham, S; Tarrio, C; Lucatorto, T B; Madey, T E; Bajt, S; Chandhok, M; Yan, P; Wood, O; Wurn, S; Edwards, N V

2006-02-24T23:59:59.000Z

65

Ground State Magnetic Moments of Mirror Nuclei Studied at NSCL  

E-Print Network (OSTI)

Progress in the measurement of the ground state magnetic moments of mirror nuclei at NSCL is presented. The systematic trend of the spin expectation value $$ and the linear behavior of $\\gamma_p$ versus $\\gamma_n$, both extracted from the magnetic moments of mirror partners, are updated to include all available data.

P. F. Mantica; K. Minamisono

2009-01-22T23:59:59.000Z

66

Magic mirror: a new VR platform design and its applications  

Science Conference Proceedings (OSTI)

This paper describes a case study of VR platform Magic Mirror and its applications that are economic in development process and cost, flexible by contents and installation conditions, and that has business potential for consumer market. Magic Mirror ... Keywords: IR, VR, composition, distant learning, interaction, tangible interface, vision tracking

Ig-Jae Kim; Hyun Jin Lee; Hyoung-Gon Kim

2004-09-01T23:59:59.000Z

67

Metaphor or diagram?: comparing different representations for group mirrors  

Science Conference Proceedings (OSTI)

This paper aims at answering the question how ambient displays can be used as group mirrors to support collaborative (learning) activities. Our research question is to what extent the type of feedback representation affects collaborative processes. Two ... Keywords: ambient display, collaborative learning, group mirror, metaphor

Sara Streng; Karsten Stegmann; Heinrich Hußmann; Frank Fischer

2009-11-01T23:59:59.000Z

68

Magnetic mirror fusion systems: Characteristics and distinctive features  

SciTech Connect

A tutorial account is given of the main characteristics and distinctive features of conceptual magnetic fusion systems employing the magnetic mirror principle. These features are related to the potential advantages that mirror-based fusion systems may exhibit for the generation of economic fusion power.

Post, R.F.

1987-08-10T23:59:59.000Z

69

Minimum-mirror-area single-stage solar concentrators  

SciTech Connect

A means of generating a comcentrating mirror of minimum size for a given average flux-concentration output is outlined. The method is useful for acceptance angles typical of those required for tilting and tracking solar concentrators and can result in substantial cost savings when expensive mirrors (i.e.,glass) are used. Comparisons are made with compound parabolic concentrators.

Mills, D.; Harting, E.; Giutronich, J.E.; Cellich, W.; Morton, A.; Walker, I.

1980-12-01T23:59:59.000Z

70

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

E-Print Network (OSTI)

5. “Shima-Uta” as Window, “Shima-Uta” as Mirror . . . 5.1.THESIS “SHIMA-UTA:” OF WINDOWS, MIRRORS, AND THE ADVENTURESDIEGO “SHIMA-UTA:” OF WINDOWS, MIRRORS, AND THE ADVENTURES

Alarcón-Jiménez, Ana-María

2009-01-01T23:59:59.000Z

71

Lower Cost CPV 3-Sun Mirror Modules  

SciTech Connect

In a series of patent applications filed between 2002 and 2005, JX Crystals Inc described a evolutionary lower-cost low-concentration planar solar photovoltaic module that uses multiple linear rows of silicon cells and standard one-sun circuit laminations incorporating glass and EVA weather proofing encapsulations. The three novel features that we described are interdependent and integrated together to yield lower cost PV modules. These 3 novel features are: (1) The use of rows of linear mirrors or linear Fresnel lenses aligned with the cell rows and concentrating the sunlight onto the cell rows. (2) The addition of a thin aluminum sheet heat spreader on the back of the circuit lamination to spread the heat away from the cell rows so that the cell operating temperature remains acceptably low. (3) The incorporation of slots in the back of the aluminum sheet heat spreader to accommodate the differences in thermal expansion between the silicon cells, the glass, and the aluminum so that the circuit interconnectivity is maintained over time. Various embodiments of this planar linear concentrator panel are shown in figures 1 to 5. Figures 1 and 2 show the original planar linear concentrator module concept from July of 2002 with either mirrors (figure 1) or linear Fresnel lenses (figure 2). The idea was expanded in 2003 with the idea of an aluminum sheet heat spreader added to the back of a standard PV circuit lamination as shown in figure 3. In 2003, we also transitioned from half cells to third cells using SunPower cells as shown in figure 4. JX Crystals Inc then received funding for the 3-sun PV mirror module concept from the Shanghai Science and Technology Commission in 2003 and from the Shanghai Flower Port and the Shanghai Import and Export Trading Company in 2005. This funding led to a 800 panel pilot production run of our JX Crystals designed 3-sun module in 2006. 672 of these panels were installed in a 100 kW demonstration and an additional 24 panels were installed in a second 4 kW demonstration both at the Flower Port in Shanghai. Both of these systems were completed in 2006. Our 3-sun PV Panel concept has been described previously (see references 1, 2, & 3 available at www.jxcrystals.com under publication tab). We are now interested in bringing this potentially lower cost 3-sun technology back to the US. For any new technology, three issues need to be addressed. They are performance, durability, and cost. These topics are addressed in the next 3 sections.

Fraas, Dr. Lewis [JX Crystals, Inc.; Avery, James E. [JX Crystals, Inc.; Minkin, Leonid M [ORNL; Huang, H, [JX Crystals, Inc.; Gehl, Anthony C [ORNL; Maxey, L Curt [ORNL

2007-01-01T23:59:59.000Z

72

Coating thermal noise of a finite-size cylindrical mirror  

E-Print Network (OSTI)

Thermal noise of a mirror is one of the limiting noise sources in the high precision measurement such as gravitational-wave detection, and the modeling of thermal noise has been developed and refined over a decade. In this paper, we present a derivation of coating thermal noise of a finite-size cylindrical mirror based on the fluctuation-dissipation theorem. The result agrees to a previous result with an infinite-size mirror in the limit of large thickness, and also agrees to an independent result based on the mode expansion with a thin-mirror approximation. Our study will play an important role not only to accurately estimate the thermal-noise level of gravitational-wave detectors but also to help analyzing thermal noise in quantum-measurement experiments with lighter mirrors.

Kentaro Somiya; Kazuhiro Yamamoto

2009-03-17T23:59:59.000Z

73

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

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

Background-reducing x-ray multilayer mirror  

DOE Patents (OSTI)

This invention is comprised of a 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 {Angstrom} wavelengths have been optimized, while that at 304 {Angstrom} 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, their number and distance for the ``wavetrap.``

Bloch, J.J.; Roussel-Dupre, D.; Smith, B.W.

1990-08-03T23:59:59.000Z

76

Engineering and manufacturing of ITER first mirror mock-ups  

SciTech Connect

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

77

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

78

Spin Chains as Perfect Quantum State Mirrors  

E-Print Network (OSTI)

Quantum information transfer is an important part of quantum information processing. Several proposals for quantum information transfer along linear arrays of nearest-neighbor coupled qubits or spins were made recently. Perfect transfer was shown to exist in two models with specifically designed strongly inhomogeneous couplings. We show that perfect transfer occurs in an entire class of chains, including systems whose nearest-neighbor couplings vary only weakly along the chain. The key to these observations is the Jordan-Wigner mapping of spins to noninteracting lattice fermions which display perfectly periodic dynamics if the single-particle energy spectrum is appropriate. After a half-period of that dynamics any state is transformed into its mirror image with respect to the center of the chain. The absence of fermion interactions preserves these features at arbitrary temperature and allows for the transfer of nontrivially entangled states of several spins or qubits.

Peter Karbach; Joachim Stolze

2005-01-03T23:59:59.000Z

79

Contained Modes In Mirrors With Sheared Rotation  

SciTech Connect

In mirrors with E × B rotation, a fixed azimuthal perturbation in the lab frame can appear as a wave in the rotating frame. If the rotation frequency varies with radius, the plasma-frame wave frequency will also vary radially due to the Doppler shift. A wave that propagates in the high rotation plasma region might therefore be evanescent at the plasma edge. This can lead to radially localized Alfven eigenmodes with high azimuthal mode numbers. Contained Alfven modes are found both for peaked and non-peaked rotation profiles. These modes might be useful for alpha channeling or ion heating, as the high azimuthal wave number allows the plasma wave frequency in the rotating frame to exceed the ion cyclotron frequency. __________________________________________________

Abraham J. Fetterman and Nathaniel J. Fisch

2010-10-08T23:59:59.000Z

80

Quantum dissipative effects in graphene-like mirrors  

E-Print Network (OSTI)

We study quantum dissipative effects due to the accelerated motion of a single, imperfect, zero-width mirror. It is assumed that the microscopic degrees of freedom on the mirror are confined to it, like in plasma or graphene sheets. Therefore, the mirror is described by a vacuum polarization tensor $\\Pi_{\\alpha\\beta}$ concentrated on a time-dependent surface. Under certain assumptions about the microscopic model for the mirror, we obtain a rather general expression for the Euclidean effective action, a functional of the time-dependent mirror's position, in terms of two invariants that characterize the tensor $\\Pi_{\\alpha\\beta}$. The final result can be written in terms of the TE and TM reflection coefficients of the mirror, with qualitatively different contributions coming from them. We apply that general expression to derive the imaginary part of the `in-out' effective action, which measures dissipative effects induced by the mirror's motion, in different models, in particular for an accelerated graphene sheet.

C. D. Fosco; F. C. Lombardo; F. D. Mazzitelli; M. L. Remaggi

2013-07-02T23:59:59.000Z

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.


81

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

82

Summary of the MARS tandem-mirror reactor design  

SciTech Connect

A recently completed two-year study of a commercial tandem-mirror reactor design (Mirror Advanced Reactor Study (MARS)) is briefly reviewed. The end plugs are designed for trapped-particle stability, MHD ballooning, balanced geodesic curvature, and small radial electric fields in the central cell. New technologies such as lithium-lead blankets, 24 T hybrid coils, gridless direct converters and plasma halo vacuum pumps are highlighted. General characteristics of the MARS tandem mirror and STARFIRE tokamak reactor design are compared. A design of an upgrade of MFTF-B incorporating many of the MARS features is discussed.

Logan, B.G.

1983-09-01T23:59:59.000Z

83

Magnetic moments of T=3/2 mirror pairs  

Science Conference Proceedings (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

84

Is There a Switchable Mirror in Your Future?  

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

Is There a Switchable Mirror in Your Future? Is There a Switchable Mirror in Your Future? Speaker(s): Thomas Richardson Date: February 10, 2005 - 12:00pm Location: Bldg. 90 Seminar Host/Point of Contact: Venkat Srinivasan Electrochromic devices (switchable mirrors) that exhibit large dynamic ranges for reflectance in the visible and infrared regimes can now be made using a variety of materials. Devices incorporating these films can be used to improve energy efficiency in buildings and vehicles by controlling the flow of heat not only through windows and skylights, but also through opaque roof and wall panels. Switchable mirrors based on three completely different chemical reactions have been developed at LBNL. The best known example utilizes conversion of a thin metal film to an insulating and transparent metal hydride by either direct exposure to hydrogen gas

85

Trapped Ion Imaging with a High Numerical Aperture Spherical Mirror  

E-Print Network (OSTI)

Efficient collection and analysis of trapped ion qubit fluorescence is essential for robust qubit state detection in trapped ion quantum computing schemes. We discuss simple techniques of improving photon collection efficiency using high numerical aperture (N.A.) reflective optics. To test these techniques we placed a spherical mirror with an effective N.A. of about 0.9 inside a vacuum chamber in the vicinity of a linear Paul trap. We demonstrate stable and reliable trapping of single barium ions, in excellent agreement with our simulations of the electric field in this setup. While a large N.A. spherical mirror introduces significant spherical aberration, the ion image quality can be greatly improved by a specially designed aspheric corrector lens located outside the vacuum system. Our simulations show that the spherical mirror/corrector design is an easy and cost-effective way to achieve high photon collection rates when compared to a more sophisticated parabolic mirror setup.

G Shu; M R Dietrich; N Kurz; B B Blinov

2009-01-29T23:59:59.000Z

86

Trapped Ion Imaging with a High Numerical Aperture Spherical Mirror  

E-Print Network (OSTI)

Efficient collection and analysis of trapped ion qubit fluorescence is essential for robust qubit state detection in trapped ion quantum computing schemes. We discuss simple techniques of improving photon collection efficiency using high numerical aperture (N.A.) reflective optics. To test these techniques we placed a spherical mirror with an effective N.A. of about 0.9 inside a vacuum chamber in the vicinity of a linear Paul trap. We demonstrate stable and reliable trapping of single barium ions, in excellent agreement with our simulations of the electric field in this setup. While a large N.A. spherical mirror introduces significant spherical aberration, the ion image quality can be greatly improved by a specially designed aspheric corrector lens located outside the vacuum system. Our simulations show that the spherical mirror/corrector design is an easy and cost-effective way to achieve high photon collection rates when compared to a more sophisticated parabolic mirror setup.

Shu, G; Kurz, N; Blinov, B B

2009-01-01T23:59:59.000Z

87

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

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

SLAC National Accelerator Laboratory - K-B Mirrors Harness X...  

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

B Mirrors Harness X-rays for Science By Mike Ross October 11, 2011 Up close, they look simple as can be: a pair of metal bars, each with one side polished to a brilliant shine. One...

90

Windows and mirrors needed for a laser-driven photoneutralizer  

SciTech Connect

Rough estimates of the neutral fraction obtainable from a photoneutralizer and of the power required to operate it are presented as functions of the window and mirror performance. More precise information will become available in the future.

Fink, J.H.

1983-06-22T23:59:59.000Z

91

Wavefront control in space with MEMS deformable mirrors  

E-Print Network (OSTI)

To meet the high contrast requirement of 1 × 10[superscript ?10] to image an Earth-like planet around a Sun-like star, space telescopes equipped with coronagraphs require wavefront control systems. Deformable mirrors (DMs) ...

Cahoy, Kerri L.

92

Mechanical-engineering aspects of mirror-fusion technology  

DOE Green Energy (OSTI)

The mirror approach to magnetic fusion has evolved from the original simple mirror cell to today's mainline effort: the tandem-mirror machine with thermal barriers. Physics and engineering research is being conducted throughout the world, with major efforts in Japan, the USSR, and the US. At least one facility under construction (MFTF-B) will approach equivalent energy breakeven in physics performance. Significant mechanical engineering development is needed, however, before a demonstration reactor can be constructed. The principal areas crucial to mirror reactor development include large high-field superconducting magnets, high-speed continuous vacuum-pumping systems, long-pulse high-power neutral-beam and rf-plasma heating systems, and efficient high-voltage high-power direct converters. Other areas common to all fusion systems include tritium handling technology, first-wall materials development, and fusion blanket design.

Fisher, D.K.; Doggett, J.N.

1982-07-15T23:59:59.000Z

93

Aerosols: Smoke and Mirrors of the Climate System  

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

Aerosols: Smoke and Mirrors of the Climate System Speaker(s): Dr. Harshvardhan Date: May 16, 2011 - 3:00pm Location: 90-3075 Seminar HostPoint of Contact: Surabi Menon Solid and...

94

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

95

Kinetic effects on ballooning modes in mirror machines  

SciTech Connect

A general procedure for examining the influence of kinetic effects on the stability of magnetohydrodynamic ballooning modes in mirror machines is presented. In particular, the basic kinetic ballooning mode equation for a nonaxisymmetric, arbitrary beta system with anisotropic pressure is derived. Considering a long-thin equilibrium typical of the tandem mirror, it is shown that this governing eigenmode equation reduces to a simple form independent of wave-particle resonant effects.

Tang, W.M.; Catto, P.J.

1981-07-01T23:59:59.000Z

96

Switchable Mirrors Based on Nickel-Magnesium Films  

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

Switchable Mirrors Based on Nickel-Magnesium Films Switchable Mirrors Based on Nickel-Magnesium Films Title Switchable Mirrors Based on Nickel-Magnesium Films Publication Type Journal Article LBNL Report Number LBNL-47180 Year of Publication 2001 Authors Richardson, Thomas J., Jonathan L. Slack, Robert D. Armitage, Robert Kostecki, Baker Farangis, and Michael D. Rubin Journal Applied Physics Letters Volume 78 Pagination 3047 Call Number LBNL-47180 Abstract An electrochromic mirror electrode based on reversible uptake of hydrogen in nickel magnesium alloy films is reported. Thin, magnesium-rich Ni-Mg films prepared on glass substrates by cosputtering from Ni and Mg targets are mirror-like in appearance and have low visible transmittance. Upon exposure to hydrogen gas or on cathodic polarization in alkaline electrolyte, the films take up hydrogen and become transparent. When hydrogen is removed, the mirror properties are recovered. The transition is believed to result from reversible formation of Mg2NiH4 and MgH2. A thin overlayer of palladium was found to enhance the kinetics of hydrogen insertion and extraction, and to protect the metal surface against oxidation.

97

Whisper gallery mirrors reflectivities from 100 [angstrom] to 500 [angstrom  

SciTech Connect

We have examined optical constants and predicted reflectivities of candidate surface coatings for whisper gallery mirrors in the extreme ultraviolet (100 [Angstrom] to 500 [Angstrom]). Previous work of Vinogradov and coworkers have identified the spectral regime near 100-150 [Angstrom] as particularly promising due to the high whisper gallery mirror reflectivities of the noble metals in the vicinity of their Cooper minima in this regime. We confirm this basic result using newer optical data, and we have sought surface materials which would extend the range over which the whisper gallery mirrors may be used: between 100 to 500 [Angstrom]. We find that substantial whisper gallery mirror reflectivities (near or greater than 50%) are predicted for a variety of elements, and that the TE peak reflection is larger than TM peak reflection by on the order of 10%. However, most of the elements which do reflect well have surfaces that are vulnerable to oxygen contamination, which seriously degrades mirror performance. A cryogenic mirror design using a dynamic solid rare gas surface which has the potential to defeat such surface contaminations is described: it has peak reflectivity of more than 50% centered near 280 [Angstrom]. 8 figs, 18 refs.

Hung, Tsen-Yu; Hagelstein, P.L.

1990-01-01T23:59:59.000Z

98

Whisper gallery mirrors reflectivities from 100 {angstrom} to 500 {angstrom}  

Science Conference Proceedings (OSTI)

We have examined optical constants and predicted reflectivities of candidate surface coatings for whisper gallery mirrors in the extreme ultraviolet (100 {Angstrom} to 500 {Angstrom}). Previous work of Vinogradov and coworkers have identified the spectral regime near 100-150 {Angstrom} as particularly promising due to the high whisper gallery mirror reflectivities of the noble metals in the vicinity of their Cooper minima in this regime. We confirm this basic result using newer optical data, and we have sought surface materials which would extend the range over which the whisper gallery mirrors may be used: between 100 to 500 {Angstrom}. We find that substantial whisper gallery mirror reflectivities (near or greater than 50%) are predicted for a variety of elements, and that the TE peak reflection is larger than TM peak reflection by on the order of 10%. However, most of the elements which do reflect well have surfaces that are vulnerable to oxygen contamination, which seriously degrades mirror performance. A cryogenic mirror design using a dynamic solid rare gas surface which has the potential to defeat such surface contaminations is described: it has peak reflectivity of more than 50% centered near 280 {Angstrom}. 8 figs, 18 refs.

Hung, Tsen-Yu; Hagelstein, P.L.

1990-12-31T23:59:59.000Z

99

Evaluation of solar mirror figure by moire contouring  

DOE Green Energy (OSTI)

Moire topography is applied to the figure assessment of solar mirrors. The technique is demonstrated on component facets of a six-meter diameter, four-meter focal length, parabolic dish collector. The relative ease of experimental implementation and subsequent data analysis suggests distinct advantages over the more established laser ray trace or BCS/ICS technique for many applications. The theoretical and experimental considerations necessary to fully implement moire topography on mirror surfaces are detailed. A procedure to de-specularize the mirror is demonstrated which conserves the surface morphology without damaging the reflective surface. The moire fringe patterns observed for the actual mirror facets are compared with theoretical contours generated for representative dish facets using a computer simulation algorithm. A method for evaluating the figure error of the real facet is presented in which the error parameter takes the form of an average absolute deviation of the surface slope from theoretical. The experimental measurement system used for this study employs a 200 line/inch Ronchi transmission grating. The mirror surface is illuminated by a collimated beam at 60/sup 0/. The fringe observation is performed normal to the grating. These parameters yield contour intervals for the fringe patterns of 0.073 mm. The practical considerations for extending the techniques to higher resolution are discussed.

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

1980-06-01T23:59:59.000Z

100

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

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

Coil system for a mirror-based hybrid reactor  

SciTech Connect

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

102

Switchable mirrors based on nickel-magnesium films  

DOE Green Energy (OSTI)

A new type of electrochromic mirror electrode based on reversible uptake of hydrogen in nickel magnesium alloy films is reported. Thin,magnesium-rich Ni-Mg films prepared on glass substrates by cosputtering from Ni and Mg targets are mirror-like in appearance and have low visible transmittance. Upon exposure to hydrogen gas or on reduction in alkaline electrolyte, the films take up hydrogen and become transparent. When hydrogen is removed, the mirror properties are recovered. The transition is believed to result from reversible formation of Mg2NiH4 and MgH2. A thin overlayer of palladium was found to enhance the kinetics of hydrogen insertion and extraction,and to protect the metal surface against oxidation.

Richardson,Thomas J.; Slack, Jonathan L.; Armitage, Robert D.; Kostecki, Robert; Farangis, Baker; Rubin, Michael D.

2001-01-16T23:59:59.000Z

103

Towards all-optical optomechanics: An optical spring mirror  

E-Print Network (OSTI)

The dominant hurdle to the operation of optomechanical systems in the quantum regime is the coupling of the vibrating element to a thermal reservoir via mechanical supports. Here we propose a scheme that uses an optical spring to replace the mechanical support. We show that the resolved-sideband regime of cooling can be reached in a configuration using a high-reflectivity disk mirror held by an optical tweezer as one of the end-mirrors of a Fabry-Perot cavity. We find a final phonon occupation number of the trapped mirror ${\\bar n}$= 0.14 for reasonable parameters, well within the quantum regime. This demonstrates the promise of dielectric disks attached to optical springs for the observation of quantum effects in macroscopic objects.

S. Singh; G. A. Phelps; D. S. Goldbaum; E. M. Wright; P. Meystre

2010-05-19T23:59:59.000Z

104

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

2011-05-10T23:59:59.000Z

105

ATLAS and CMS hints for a mirror Higgs boson  

Science Conference Proceedings (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 nonstandard Higgs physics.

Foot, Robert; Kobakhidze, Archil; Volkas, Raymond R. [ARC Centre of Excellence for Particle Physics at the Terascale, School of Physics, University of Melbourne, Victoria 3010 (Australia)

2011-11-01T23:59:59.000Z

106

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

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

Inside the Tandem Mirror Experiment Inside the Tandem Mirror Experiment Photo of the Week: Inside the Tandem Mirror Experiment December 28, 2012 - 2:22pm Addthis This 1978 photo shows two workers inside the Mirror Fusion Test Facility, a magnetic confinement fusion device designed and built at Lawrence Livermore National Laboratory. In this experiment, magnetic mirrors are placed at both ends of a central magnetic tube. Very hot and dense plasmas inside each mirror enhanced the confinement of another plasma inside the central tube, where the bulk of the fusion would occur. | Photo courtesy of Lawrence Livermore National Laboratory. This 1978 photo shows two workers inside the Mirror Fusion Test Facility, a magnetic confinement fusion device designed and built at Lawrence Livermore National Laboratory. In this experiment, magnetic mirrors are placed at

107

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

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

The Mirror Fusion Test Facility The Mirror Fusion Test Facility Photo of the Week: The Mirror Fusion Test Facility July 19, 2013 - 4:17pm Addthis This 1981 photo shows the Mirror Fusion Test Facility (MFTF), an experimental magnetic confinement fusion device built using a magnetic mirror at Lawrence Livermore National Laboratory (LLNL). The MFTF functioned as the primary research center for mirror fusion devices. The design consisted of a 64-meter-long vacuum vessel fitted with 26 coil magnets bonding the center of the vessel and two 400-ton yin-yang magnet mirrors at either end. The first magnet produced a magnetic field force equal to the weight of 30 jumbo jets hanging from the magnet coil. | Photo courtesy of Lawrence Livermore National Laboratory. This 1981 photo shows the Mirror Fusion Test Facility (MFTF), an

108

Floer cohomology in the mirror of the projective plane and a binodal cubic curve  

E-Print Network (OSTI)

We construct a family of Lagrangian submanifolds in the Landau-Ginzburg mirror to the projective plane equipped with a binodal cubic curve as anticanonical divisor. These objects correspond under mirror symmetry to the ...

Pascaleff, James Thomas

2011-01-01T23:59:59.000Z

109

Integrated modeling and design of lightweight, active mirrors for launch survival and on-orbit performance  

E-Print Network (OSTI)

Lightweight, active mirrors are an enabling technology for large aperture, space-based optical systems. These mirrors have the potential to improve the optical resolution and sensitivity beyond what is currently possible. ...

Cohan, Lucy Elizabeth

2010-01-01T23:59:59.000Z

110

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

111

Alpha Channeling in Mirror Machines N. J. Fisch  

E-Print Network (OSTI)

.20.ÿj, 52.55.Jd, 52.55.Pi Because of their engineering simplicity, high-#12;, and steady-state operation- state operation [9]. These effects would lower significantly the cost of electricity by tokamak fusion through uses of rf heating. Coupling rf power into the mirror tends to pump-out plasma [3,4], but it might

112

Transparent heat mirrors for passive solar heating applications  

DOE Green Energy (OSTI)

Recent progress in the development of transparent heat mirror coatings for energy-efficient windows and passive solar applications is reviewed. It appears that cost-efficient coatings promising savings of 25 to 75%, depending upon application, may be available to window manufacturers and homeowners in the next one to three years. Performance, applications, and limitations are discussed.

Selkowitz, S.

1978-03-01T23:59:59.000Z

113

EFFECT OF TIN BOMBARDMENT AND DEPOSITION ON COLLECTOR MIRROR  

E-Print Network (OSTI)

Ultraviolet (EUV) reflective properties of candidate mirror materials is a critical issue for the commercial regarding optics lifetime during EUV source operation. Two types of Sn exposures were performed in IMPACT due to vapor condensation, while the energetic source simulates bombardment due to energetic ions

Harilal, S. S.

114

Mirror stability of a hot electron ring plasma  

SciTech Connect

The free energy associated with the anisotropy in the velocity space of a microwave-heated hot electron distribution can drive the mirror mode unstable. The real frequency of this instability is of the same order as the diamagnetic drift frequency of the hot electrons.

Tsang, K.T.

1983-01-01T23:59:59.000Z

115

Thermal instability of thermonuclear plasma in a mirror field  

SciTech Connect

In this paper, the thermal stability of a thermonuclear plasma in a mirror reactor is obtained by a simple model. The effect of the loss of thermonuclear alpha particles due to collisional pitch-angel scattering into loss cones is included in this analysis. The effect of the collisional loss is significant, and it has a stabilizing effect on the thermal instability.

Mizuno, N. (Nihon Univ., Tokyo (Japan). Coll. of Science and Engineering)

1990-11-01T23:59:59.000Z

116

Thin?film conducting microgrids as transparent heat mirrors  

Science Conference Proceedings (OSTI)

A new type of transparent heat mirror for solar?energy applications has been fabricated by chemically etching a Sn?doped In2O3 film to form a transparent conducting microgrid. For square openings 2.5 ?m on a side

John C. C. Fan; Frank J. Bachner; R. A. Murphy

1976-01-01T23:59:59.000Z

117

Mirror thermal noise in laser interferometer gravitational wave detectors operating at room and cryogenic temperature  

E-Print Network (OSTI)

Mirror thermal noise is and will remain one of the main limitations to the sensitivity of gravitational wave detectors based on laser interferometers. We report about projected mirror thermal noise due to losses in the mirror coatings and substrates. The evaluation includes all kind of thermal noises presently known. Several of the envisaged substrate and coating materials are considered. The results for mirrors operated at room temperature and at cryogenic temperature are reported.

Janyce Franc; Nazario Morgado; Raffaele Flaminio; Ronny Nawrodt; Iain Martin; Liam Cunningham; Alan Cumming; Sheila Rowan; James Hough

2009-12-01T23:59:59.000Z

118

Lasers without Mirrors, Designed by Supercomputer - NERSC SCience News  

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

Lasers without Lasers without Mirrors, Designed by Supercomputer Lasers without Mirrors, Designed by Supercomputer October 14, 2009 | Tags: Lasers, Life Sciences, Materials Science Contact: Ji Qiang | Lawrence Berkeley National Laboratory | JQiang@lbl.gov John Corlett | Lawrence Berkeley National Laboratory, Center for Beam Physics | JNCorlett@lbl.gov Sometimes it takes a big machine to understand the tiniest details. That's the case with free electron lasers (FELs). The powerful X-rays they generate can probe matter directly at the level of atomic interactions and chemical-bond formation, letting scientists observe such phenomena as chemical reactions in trace elements, electric charges in photosynthesis and the structure of microscopic machines. FELs have the potential to

119

Standardization of Solar Mirror Reflectance Measurements - Round Robin Test: Preprint  

DOE Green Energy (OSTI)

Within the SolarPaces Task III standardization activities, DLR, CIEMAT, and NREL have concentrated on optimizing the procedure to measure the reflectance of solar mirrors. From this work, the laboratories have developed a clear definition of the method and requirements needed of commercial instruments for reliable reflectance results. A round robin test was performed between the three laboratories with samples that represent all of the commercial solar mirrors currently available for concentrating solar power (CSP) applications. The results show surprisingly large differences in hemispherical reflectance (sh) of 0.007 and specular reflectance (ss) of 0.004 between the laboratories. These differences indicate the importance of minimum instrument requirements and standardized procedures. Based on these results, the optimal procedure will be formulated and validated with a new round robin test in which a better accuracy is expected. Improved instruments and reference standards are needed to reach the necessary accuracy for cost and efficiency calculations.

Meyen, S.; Lupfert, E.; Fernandez-Garcia, A.; Kennedy, C.

2010-10-01T23:59:59.000Z

120

Shielding of mirror FERF plasma by arc discharges  

SciTech Connect

The feasibility of shielding a mirror-confined fusion plasma against erosion by incident neutrals with a plasma blanket generated by an array of hollow-cathode arc discharges was studied. Such a plasma blanket could also be used for linetying stabilization of a single mirror confined plasma as well as to provide a warm plasma stream for stabilization of microinstabilities. The requirements for the plasma blanket are dependent on the parameter ..gamma.., the ratio of the actual cross-field diffusion coefficient to the classical value. The power requirement compares favorably with power loss due to change exchange without shielding. More importantly, the blanket permits a relaxation of vacuum requirements to prevent erosion of the hot plasma by background neutrals.

Woo, J.T.

1976-12-08T23:59:59.000Z

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

Feasibility Studies of Alpha-Channeling in Mirror Machines  

SciTech Connect

The linear magnetic trap is an attractive concept both for fusion reactors and for other plasma applications due to its relative engineering simplicity and high-beta operation. Applying the ?- channeling technique to linear traps, such as mirror machines, can benefit this concept by efficiently redirecting ? particle energy to fuel ion heating or by otherwise sustaining plasma confinement, thus increasing the effective fusion reactivity. To identify waves suitable for ?-channeling a rough optimization of the energy extraction rate with respect to the wave parameters is performed. After the optimal regime is identified, a systematic search for modes with similar parameters in mirror plasmas is performed, assuming quasi-longitudinal or quasi-transverse wave propagation. Several modes suitable for ? particle energy extraction are identified for both reactor designs and for proof- of-principle experiments.

A. I. Zhmoginov and N. J. Fisch

2010-03-19T23:59:59.000Z

122

Wave-driven Rotation in Supersonically Rotating Mirrors  

SciTech Connect

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

123

Simulation of Alpha-Channeling in Mirror Machines  

SciTech Connect

Applying ?-channeling techniques to mirror machines can significantly increase their effective reactivity, thus making open configurations more advantageous for practical fusion. A large fraction of ? particle energy can be extracted using rf waves. Effects employed to cool ? particles can also in principle be used to heat the fusion ions; the possibility to design a configuration of rf waves which could be used to perform both tasks is demonstrated.

A.I. Zhmoginov, N.J. Fisch

2008-03-17T23:59:59.000Z

124

Near-field enhancement of metal nano-particle based on the light focusing by the micro-parabolic mirror  

E-Print Network (OSTI)

Near-field enhancement of metal nano-particle based on the light focusing by the micro-parabolic mirror , , , , Abstract We propose to use a micro-parabolic mirror, in order to improve the near- parabolic mirror, the mirror-reflected light can be efficiently transformed into the near-field of the nano

Park, Namkyoo

125

Borehole Imaging of In Situ Stress Tests at Mirror Lake Research Site |  

Open Energy Info (EERE)

Borehole Imaging of In Situ Stress Tests at Mirror Lake Research Site Borehole Imaging of In Situ Stress Tests at Mirror Lake Research Site Jump to: navigation, search OpenEI Reference LibraryAdd to library Web Site: Borehole Imaging of In Situ Stress Tests at Mirror Lake Research Site Author U.S. Geological Survey Published U.S. Geological Survey, 2013 DOI Not Provided Check for DOI availability: http://crossref.org Online Internet link for Borehole Imaging of In Situ Stress Tests at Mirror Lake Research Site Citation U.S. Geological Survey. Borehole Imaging of In Situ Stress Tests at Mirror Lake Research Site [Internet]. 2013. U.S. Geological Survey. [cited 2013/10/16]. Available from: http://water.usgs.gov/ogw/bgas/toxics/ml_bips.html Retrieved from "http://en.openei.org/w/index.php?title=Borehole_Imaging_of_In_Situ_Stress_Tests_at_Mirror_Lake_Research_Site&oldid=688729"

126

Mirror mounts designed for the Advanced Photon Source SRI-CAT  

SciTech Connect

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

127

Development of mirror manipulator for hard-x-ray nanofocusing at sub-50-nm level  

Science Conference Proceedings (OSTI)

X-ray focusing using Kirkpatrick-Baez (KB) mirrors is promising owing to their capability of highly efficient and energy-tunable focusing. We report the development of a mirror manipulator which enables KB mirror alignment with a high degree of accuracy. Mirror alignment tolerances were estimated using two types of simulators. On the basis of the simulation results, the mirror manipulator was developed to achieve an optimum KB mirror setup. As a result of focusing tests at BL29XUL of SPring-8, the beam size of 48x36 nm{sup 2} (VxH) was achieved in the full width at half maximum at an x-ray energy of 15 keV. Spatial resolution tests showed that a scanning x-ray microscope equipped with the KB focusing system could resolve line-and-space patterns of 80 nm linewidth in a high visibility of 60%.

Matsuyama, S.; Mimura, H.; Yumoto, H.; Hara, H.; Yamamura, K.; Sano, Y.; Endo, K.; Mori, Y.; Yabashi, M.; Nishino, Y.; Tamasaku, K.; Ishikawa, T.; Yamauchi, K. [Department of Precision Science and Technology, Graduate School of Engineering, Osaka University, 2-1 Yamada-oka, Suita, Osaka 565-0871 (Japan); Research Center for Ultra-Precision Science and Technology, Graduate School of Engineering, Osaka University, 2-1 Yamada-oka, Suita, Osaka 565-0871 (Japan); Department of Precision Science and Technology, Graduate School of Engineering, Osaka University, 2-1 Yamada-oka, Suita, Osaka 565-0871 (Japan); Research Center for Ultra-Precision Science and Technology, Graduate School of Engineering, Osaka University, 2-1 Yamada-oka, Suita, Osaka 565-0871 (Japan); SPring-8/Japan Synchrotron Radiation Research Institute (JASRI), 1-1-1 Kouto, Mikazuki, Hyogo 679-5148 (Japan); SPring-8/RIKEN, 1-1-1 Kouto, Mikazuki, Hyogo 679-5148 (Japan); Department of Precision Science and Technology, Graduate School of Engineering, Osaka University, 2-1 Yamada-oka, Suita, Osaka 565-0871 (Japan)

2006-09-15T23:59:59.000Z

128

Deployable telescope having a thin-film mirror and metering structure  

Science Conference Proceedings (OSTI)

A deployable thin-film mirror telescope comprises a base structure and a metering structure. The base structure houses a thin-film mirror, which can be rolled for stowage and unrolled for deployment. The metering structure is coupled to the base structure and can be folded for stowage and unfolded for deployment. In the deployed state, the unrolled thin-film mirror forms a primary minor for the telescope and the unfolded metering structure positions a secondary minor for the telescope.

Krumel, Leslie J. (Cedar Crest, NM); Martin, Jeffrey W. (Albuquerque, NM)

2010-08-24T23:59:59.000Z

129

Producing thermochemical hydrogen with the tandem-mirror reactor  

SciTech Connect

Fusion power holds the promise to supply not only electricity but also fuels to meet the balance of our energy needs. A new integrated power and breeding blanket design is described for tandem mirror reactors. The blanket incorporates features that make it suitable for synthetic fuel production. In particular, it is matched to the thermal and electrical power requirements of the General Atomic water-splitting process for production of hydrogen. Some improvements to the high temperature chemical process steps are described. These improvements are expected to allow production of hydrogen at about $13/GJ wholesale, including financing costs, capital amortization, and profit.

Werner, R.W.; Hickman, R.G.

1982-05-07T23:59:59.000Z

130

HEPDATA: High Energy Physics Reaction Database (SLAC Mirror)  

DOE Data Explorer (OSTI)

HEPDATA: Reaction Data Database contains numerical values of HEP scattering data such as total and differential cross sections, fragmentation functions, structure functions, and polarisation measurements, from a wide range of experiments. It is compiled by the Durham Database Group (UK) with help from the COMPAS group (Russia,) and is updated at regular intervals.[copied from http://www.slac.stanford.edu/spires/hepdata/index.html] While DOE does not fund this resource, the database does contain data generated by various DOE groups. SLAC hosts the mirror of the Durham database on its website in California.

131

Effect of hydrogen-switchable mirrors on the Casimir force  

E-Print Network (OSTI)

We present systematic measurements of the Casimir force between a gold-coated plate and a sphere coated with a Hydrogen Switchable Mirror (HSM). HSMs are shiny metals that can become transparent by hydrogenation. In spite of such a dramatic change of the optical properties of the sphere, we did not observe any significant decrease of the Casimir force after filling the experimental apparatus with hydrogen. This counterintuitive result can be explained by the Lifshitz theory that describes the Casimir attraction between metallic and dielectric materials.

Davide Iannuzzi; Mariangela Lisanti; Federico Capasso

2004-03-19T23:59:59.000Z

132

Measurement and modeling of mirror distortion in a high power FEL  

Science Conference Proceedings (OSTI)

Mirror heating in a high power FEL can alter the optical mode and affect the gain of the laser. This can lead to a large reduction of the laser power from ideal values. Measurements of the power and mode size in the Jefferson Lab IR Demo laser have shown clear evidence of mirror distortion at high average power leading (up to 17 kW incident on the mirrors and over 40 W absorbed per mirror). The measurements and comparisons with modeling will be presented. Both steady state and transient analyses and measurements are considered.

Benson, S.; Neil, G.; Michelle D. Shinn

2000-01-01T23:59:59.000Z

133

Underwater Mirror Exposure to Free-Ranging Naïve Atlantic Spotted Dolphins (Stenella frontalis) in the Bahamas  

E-Print Network (OSTI)

Vocalizations and associated underwater behavior of free-Comparative Psychology Underwater Mirror Exposure to Free-frontalis) has been studied underwater in the Bahamas. We

Delfour, Fabienne; Herzing, Denise

2013-01-01T23:59:59.000Z

134

Quantum state transfer between a Bose-Einstein condensate and an optomechanical mirror  

E-Print Network (OSTI)

In this paper we describe a scheme for state transfer between a trapped atomic Bose condensate and an optomechanical end-mirror mediated by a cavity field. Coupling between the mirror and the cold gas arises from the fact that the cavity field can produce density oscillations in the gas which in turn acts as an internal Bragg mirror for the field. After adiabatic elimination of the cavity field we find that the hybrid system of the gas and mirror is described by a beam splitter Hamiltonian that allows for state transfer, but only if the quantum nature of the cavity field is retained.

S. Singh; H. Jing; E. M. Wright; P. Meystre

2012-02-28T23:59:59.000Z

135

Distributed Sensing and Shape Control of Piezoelectric Bimorph Mirrors  

SciTech Connect

As part of a collaborative effort between Sandia National Laboratories and the University of Kentucky to develop a deployable mirror for remote sensing applications, research in shape sensing and control algorithms that leverage the distributed nature of electron gun excitation for piezoelectric bimorph mirrors is summarized. A coarse shape sensing technique is developed that uses reflected light rays from the sample surface to provide discrete slope measurements. Estimates of surface profiles are obtained with a cubic spline curve fitting algorithm. Experiments on a PZT bimorph illustrate appropriate deformation trends as a function of excitation voltage. A parallel effort to effect desired shape changes through electron gun excitation is also summarized. A one dimensional model-based algorithm is developed to correct profile errors in bimorph beams. A more useful two dimensional algorithm is also developed that relies on measured voltage-curvature sensitivities to provide corrective excitation profiles for the top and bottom surfaces of bimorph plates. The two algorithms are illustrated using finite element models of PZT bimorph structures subjected to arbitrary disturbances. Corrective excitation profiles that yield desired parabolic forms are computed, and are shown to provide the necessary corrective action.

Redmond, James M.; Barney, Patrick S.; Henson, Tammy D.

1999-07-28T23:59:59.000Z

136

Transparent heat mirrors for solar-energy applications  

SciTech Connect

Transparent heat-mirror films, which transmit solar radiation but reflect ir thermal radiation, have potentially important applications in solar/thermal/electric conversion, solar heating, solar photovoltaic conversion, and window insulation. We have used rf sputtering to prepare two types of films: TiO/sub 2//Ag/TiO/sub 2/ and Sn-doped In/sub 2/O/sub 3/. To characterize the properties of heat-mirror films for solar-energy collection, we define the parameters ..cap alpha../sub eff/, the effective solar absorptivity, and epsilon/sub eff/, the effective ir emissivity. For our Sn-doped In/sub 2/O/sub 3/ films, ..cap alpha../sub eff//epsilon/sub eff/ is comparable to the values of ..cap alpha../epsilon reported for the leading selective absorbers. Even higher values of ..cap alpha../sub eff//epsilon/sub eff/ are obtained for the TiO/sub 2//Ag/TiO/sub 2/ films.

Fan, J.C.C.; Bachner, F.J.

1976-04-01T23:59:59.000Z

137

Mirror alignment and focus of point-focus solar concentrators  

DOE Green Energy (OSTI)

Distributed point-focusing solar concentrators are being developed for dish-Stirling systems and other applications. Many of these concentrators make use of faceted mirrors that have to be accurately aligned. Some of the solar concentrator designs use stretched-membrane facets that also require focusing. Accurate mirror alignment and focus of faceted solar concentrators have two benefits. First, the concentration ratio of the concentrator/receiver (collector) system is improved with accurate alignment and focus. The receiver aperture diameter can therefore be smaller, thereby reducing thermal losses from the receiver and improving the overall efficiency of the collector. Second, and perhaps more importantly, flux intensities on the receiver can be sensitive to facet alignment and focus. In this paper, the theory and practical application of an alignment and focusing technique are presented. In the technique, light from an artificial source is reflected from the concentrator`s facets to a target. From basic geometric principles, the shape and location of the reflected light on the target can be predicted. Alignment is accomplished by adjusting the facets aim so that the reflected image falls on the predetermined location. To focus a stretched-membrane facet, the reflected image size is adjusted to match that of the target. The governing equations used to draw the alignment targets are developed and the practical application of the technique to the alignment and focus of the Cummins Power Generation, Inc. CPG-460 are presented. Alignment uncertainty associated with this technique on the CPG-460 is also discussed.

Diver, R.B.

1994-11-01T23:59:59.000Z

138

Evaluation of cellular glasses for solar mirror panel applications  

DOE Green Energy (OSTI)

An analytic technique is developed to compare the structural and environmental performance of various materials considered for backing of second surface glass solar mirrors. Metals, ceramics, dense molded plastics, foamed plastics, forest products and plastic laminates are surveyed. Cellular glass is determined to be a prime candidate due to its low cost, high stiffness-to-weight ratio, thermal expansion match to mirror glass, evident minimal environmental impact and chemical and dimensional stability under conditions of use. While applications could employ this material as a foam core or compressive member of a composite material system, the present analysis addresses the bulk material only, allowing a basis for simple extrapolations. The current state of the art and anticipated developments in cellular glass technology are discussed. Material properties are correlated to design requirements using a Weibull weakest link statistical method appropriate for describing the behavior of such brittle materials. A mathematical model is presented which suggests a design approach which allows minimization of life cycle cost; given adequate information for a specific aplication, this would permit high confidence estimates of the cost/performance factor. A mechanical and environmental testing program is outlined, designed to providea material property basis for development of cellular glass hardware, together with methodology for collecting lifetime predictive data required by the mathematical treatment provided herein. Preliminary material property data from measurements is given.

Giovan, M.; Adams, M.

1979-06-15T23:59:59.000Z

139

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

140

GDT-based neutron source with multiple-mirror end plugs  

SciTech Connect

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

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

Studies in tandem mirror theory. Paper IAEA-CN-38/F-4  

SciTech Connect

This paper discusses the formation, maintenance, and microstability of thermal barriers, which have been introduced as a means for improving tandem mirror reactor performance at reduced technological demands. It also describes calculations of tandem mirror central-cell ..beta.. limits due to MHD ballooning modes.

Baldwin, D.E.; Cohen, R.H.; Cutler, T.A.

1980-06-02T23:59:59.000Z

142

SOME ASPECTS OF HIGH TEMPERATURE PLASMA RESEARCH WITH THE MIRROR MACHINE  

SciTech Connect

The major effort of the Livermore Mirror Machine group is directed toward study of plasma stabllity and confinement in mirror geometries. The status and radial density distribution and diffusion of confined plasma are briefly summarized. The ALICE Experiment (Adiabatic Lowenergy Injection and Capture Experiment) is discussed in some detnil. (W.D.M.)

Post, R.F.

1960-01-20T23:59:59.000Z

143

Machine Protection System for the Stepper Motor Actuated SyLMAND Mirrors  

SciTech Connect

SyLMAND, the Synchrotron Laboratory for Micro and Nano Devices at the Canadian Light Source, consists of a dedicated X-ray lithography beamline on a bend magnet port, and process support laboratories in a clean room environment. The beamline includes a double mirror system with flat, chromium-coated silicon mirrors operated at varying grazing angles of incidence (4 mrad to 45 mrad) for spectral adjustment by high energy cut-off. Each mirror can be independently moved by two stepper motors to precisely control the pitch and vertical position. We present in this paper the machine protection system implemented in the double mirror system to allow for safe operation of the two mirrors and to avoid consequences of potential stepper motor malfunction.

Subramanian, V. R.; Dolton, W.; Wells, G.; Hallin, E. [Canadian Light Source, 101 Perimeter Road, Saskatoon, SK S7N 0X4 (Canada); Achenbach, S. [Department of Electrical and Computer Engineering, University of Saskatchewan, 57 Campus Dr., Saskatoon, SK S7N 5A9 (Canada); TRLabs, 111-116 Research Dr., Saskatoon, SK S7N 3R3 (Canada); Karlsruhe Institute of Technology, Postfach 3640, D-76021 Karlsruhe (Germany); Klymyshyn, D. M. [Department of Electrical and Computer Engineering, University of Saskatchewan, 57 Campus Dr., Saskatoon, SK S7N 5A9 (Canada); TRLabs, 111-116 Research Dr., Saskatoon, SK S7N 3R3 (Canada); Augustin, M. [Karlsruhe Institute of Technology, Postfach 3640, D-76021 Karlsruhe (Germany)

2010-06-23T23:59:59.000Z

144

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

145

Galactic structure explained with dissipative mirror dark matter  

E-Print Network (OSTI)

Dissipative dark matter, such as mirror dark matter and related hidden sector dark matter candidates, requires an energy source to stabilize dark matter halos in spiral galaxies. It has been proposed previously that supernovae could be the source of this energy. Recently, it has been argued that this mechanism might explain two galactic scaling relations inferred from observations of spiral galaxies. One of which is that $\\rho_0 r_0$ is roughly constant, and another relates the galactic luminosity to $r_0$. [$\\rho_0$ is the dark matter central density and $r_0$ is the core radius.] Here we derive equations for the heating of the halo via supernova energy, and the cooling of the halo via thermal bremsstrahlung. These equations are numerically solved to obtain constraints on the $\\rho_0, \\ r_0$ parameters appropriate for spiral galaxies. These constraints are in remarkable agreement with the aforementioned scaling relations.

R. Foot

2013-04-17T23:59:59.000Z

146

A dark matter scaling relation from mirror dark matter  

E-Print Network (OSTI)

Mirror dark matter, and other similar dissipative dark matter candidates, need an energy source to stabilize dark matter halos in spiral galaxies. It has been suggested previously that ordinary supernovae can potentially supply the required energy. By matching the energy supplied to the halo from supernovae to that lost due to radiative cooling, we here derive a rough scaling relation, $R_{SN} \\propto \\rho_0 r_0^2$ ($R_{SN}$ is the supernova rate and $\\rho_0, \\ r_0$ the dark matter central density and core radius). Such a relation is consistent with dark matter properties inferred from studies of spiral galaxies with halo masses larger than $3\\times 10^{11} M_\\odot$. We speculate that other observed galaxy regularities might be explained within the framework of such dissipative dark matter.

R. Foot

2013-03-07T23:59:59.000Z

147

Mirror Advanced Reactor Study (MARS): executive summary and overview  

DOE Green Energy (OSTI)

Two self-consistent MARS configurations are discussed - a 1200-MWe commercial electricity-generating plant and a synguels-generating plant that produces hydrogen with an energy equivalent to 26,000 barrels of oil per day. The MARS machine emphasizes the attractive features of the tandem mirror concept, including steady-state operation, a small-diameter high-beta plasma, a linear central cell with simple low-maintenance blankets, low first-wall heat fluxes (<10 W/cm/sup 2/), no driven plasma currents or associated disruptions, natural halo impurity diversion, and direct conversion of end-loss charged-particle power. The MARS electric plant produces 2600 MW of fusion power in a 130-m-long central cell. Advanced tandem-mirror plasma-engineering concepts, a high-efficiency liquid lithium-lead (Li/sub 17/Pb/sub 83/) blanket, and efficient direct electrical conversion of end loss power combine to produce a high net plant efficiency of 36%. With a total capital cost of $2.9 billion (constant 1983 dollars), the MARS electric plant produces busbar electricity at approx. 7 cents/kW-hour. The MARS synfuels plant produces 3500 MW of fusion power in a 150-m-long central cell. A helium-gas-cooled silicon carbide pebble-bed blanket provides high-temperature (1000/sup 0/C) heat to a thermochemical water-splitting cycle and the resulting hydrogen is catalytically converted to methanol for distribution. With a total capital cost of $3.6 billion (constant 1983 dollars), the synfuels plant produces methanol fuel at about $1.7/gal. The major features of the MARS reactor include sloshing-ion thermal barrier plugs for efficient plasma confinement, a high efficiency blanket, high-field (24-T) choke cells, drift pumping for trapped plasma species, quasi-optical electron-cyclotron resonant heating (ECRH) systems, and a component gridless direct converter.

Logan, B.G.; Perkins, L.J.; Gordon, J.D.

1984-07-01T23:59:59.000Z

148

Long stroke jar bumper sub with safety sleeve  

SciTech Connect

A hydraulic jar apparatus to be disposed in a drilling string embodying inner and outer telescopically arranged elements. Overlapping portions of the elements provide an annual chamber confining an operating liquid by an annular seal fixed to the outer element at the lower end of the chamber and an annular polly pack seal fixed to the outer element at the upper end of the chamber. A piston is extended radially from the inner element into the chamber and the chamber is divided by a cylinder on the outer element into low and high pressure sections. Impact shoulders are provided on the elements in axially opposed relation to produce a jarring blow and the elements are telescopically coupled by a hexagonal spline sub assembly.

Downen, J.L.; Sutliff, W.N.

1981-04-14T23:59:59.000Z

149

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

150

Heavy-atom neutral beams for tandem-mirror end plugs  

DOE Green Energy (OSTI)

The advantages of neutral beams with Z greater than or equal to 3 formed from negative ions, accelerated to 0.5 to 1.0 MeV/amu, and neutralized with high efficiency, are investigated for use in tandem mirror reactor end plugs. These beams can produce Q's of 20 to 30, and thus can replace the currently proposed 200 to 500 keV neutral proton beams presently planned for tandem mirror reactors. Thus, these Z greater than or equal to 3 neutral beams increase the potential attractiveness of tandem mirror reactors by offering a substitute for difficult high energy neutral hydrogen end plug beams.

Post, D.E.; Grisham, L.R.; Santarius, J.F.; Emmert, G.A.

1981-05-01T23:59:59.000Z

151

Development of metrology instruments for grazing incidence mirrors  

Science Conference Proceedings (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

152

Atomic hydrogen density measurements in the Tara tandem mirror experiment  

DOE Green Energy (OSTI)

Neutral and plasma density have been measured in the north well of the central cell of the Tara tandem mirror (Nucl. Fusion {bold 22}, 549 (1982)). The electron plasma density and temperature on the magnetic axis were measured by Thomson scattering to be about 3{times}10{sup 12} cm{sup {minus}3} and 70 eV, respectively. The corresponding axial neutral hydrogen density was found to be 1 {times}10{sup 9} cm{sup {minus}3}, while near the plasma edge at {ital r}=15 cm it reached 1{times}10{sup 10} cm{sup {minus}3}. The fill gas density at {ital r}{ge}22.5 cm was {approx}10{sup 11} cm{sup {minus}3}. Additional information from secondary electron detectors was used to estimate the radial ion temperature distribution, which was found to have about the same width, 12 cm, as the plasma density. The resulting ion pressure profile is peaked compared to the electron pressure profile. Charge exchange losses in the well are found to have a maximum at a radius equal to half the {ital e}-folding distance of the plasma density and ion temperature distributions.

Guss, W.C.; Yao, X.Z.; Pocs, L.; Mahon, R.; Casey, J.; Horne, S.; Lane, B.; Post, R.S.; Torti, R.P. (Plasma Fusion Center, Massachusetts Institute of Technology, Cambridge, MA (USA))

1990-09-01T23:59:59.000Z

153

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

DOE Green Energy (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

154

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

155

Optical-level structural modelling of membrane mirrors for spaceborne telescopes  

E-Print Network (OSTI)

The astronomy and Earth observation communities desire ever-larger space telescopes, but launch costs limit mass and technology limits size. Current research in large aperture mirrors largely supports deployed rigid optics, ...

De Blonk, Brett Jeffrey, 1971-

2003-01-01T23:59:59.000Z

156

Microfabricated surface ion trap on a high-finesse optical mirror  

E-Print Network (OSTI)

A novel approach to optics integration in ion traps is demonstrated based on a surface electrode ion trap that is microfabricated on top of a dielectric mirror. Additional optical losses due to fabrication are found to be ...

Herskind, Peter F.

157

The Behavior of the Snow White Chilled-Mirror Hygrometer in Extremely Dry Conditions  

Science Conference Proceedings (OSTI)

The Snow White hygrometer, made by Meteolabor AG, Switzerland, is a new chilled-mirror instrument using a thermoelectric Peltier cooler to measure atmospheric water vapor. Its performance under dry conditions is evaluated in simultaneous ...

H. Vömel; M. Fujiwara; M. Shiotani; F. Hasebe; S. J. Oltmans; J. E. Barnes

2003-11-01T23:59:59.000Z

158

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

159

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

160

LCLS X-ray mirror measurements using a large aperture visible light interferometer  

Science Conference Proceedings (OSTI)

Synchrotron or FEL X-ray mirrors are required to deliver an X-ray beam from its source to an experiment location, without contributing significantly to wave front distortion. Accurate mirror figure measurements are required prior to installation to meet this intent. This paper describes how a 300 mm aperture phasing interferometer was calibrated to LCLS) at Stanford Linear Accelerator Center. Measuring focus mirrors with an interferometer requires additional calibration, because high fringe density introduces systematic errors from the interferometer's imaging optics. This paper describes how these errors can be measured and corrected. The calibration approaches described here apply equally well to interferometers larger than 300 mm aperture, which are becoming more common in optics laboratories. The objective of this effort was to install LCLS flats with < 10 nm of spherical curvature, and < 2 nm rms a-sphere. The objective was met by measuring the mirrors after fabrication, coating and mounting, using a 300 mm aperture phasing interferometer calibrated to an accuracy < 1 nm. The key to calibrating the interferometer accurately was to sample the error using independent geometries that are available. The results of those measurements helped identify and reduce calibration error sources. The approach used to measure flats applies equally well to focus mirrors, provided an additional calibration is performed to measure the error introduced by fringe density. This calibration has been performed on the 300 mm aperture interferometer, and the measurement correction was evaluated for a typical focus mirror. The 300 mm aperture limitation requires stitching figure measurements together for many X-ray mirrors of interest, introducing another possible error source. Stitching is eliminated by applying the calibrations described above to larger aperture instruments. The authors are presently extending this work to a 600 mm instrument. Instruments with 900 mm aperture are now becoming available, which would accommodate the largest mirrors of interest.

McCarville, T; Soufli, R; Pivovaroff, M

2011-03-02T23:59:59.000Z

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

Comparison of Fresnel lenses and parabolic mirrors as solar energy concentrators  

SciTech Connect

This paper compares the gain that can be achieved with a one- or two-stage concentrator, when the first stage is a Fresnel lens or a parabolic mirror, as a function of the luminosity of the concentrator. The results show that the achievable gain using a parabolic mirror is greater than that obtained using a flat or roof lens but is lower than that obtained using a curved lens.

Lorenzo, E.; Luque, A.

1982-05-15T23:59:59.000Z

162

Demonstration of a 17 cm robust carbon fiber deformable mirror for adaptive optics  

Science Conference Proceedings (OSTI)

Carbon-fiber reinforced polymer (CFRP) composite is an attractive material for fabrication of optics due to its high stiffness-to-weight ratio, robustness, zero coefficient of thermal expansion (CTE), and the ability to replicate multiple optics from the same mandrel. We use 8 and 17 cm prototype CFRP thin-shell deformable mirrors to show that residual CTE variation may be addressed with mounted actuators for a variety of mirror sizes. We present measurements of surface quality at a range of temperatures characteristic of mountaintop observatories. For the 8 cm piece, the figure error of the Al-coated reflective surface under best actuator correction is {approx}43 nm RMS. The 8 cm mirror has a low surface error internal to the outer ring of actuators (17 nm RMS at 20 C and 33 nm RMS at -5 C). Surface roughness is low (< 3 nm P-V) at a variety of temperatures. We present new figure quality measurements of the larger 17 cm mirror, showing that the intra-actuator figure error internal to the outer ring of actuators (38 nm RMS surface with one-third the actuator density of the 8 cm mirror) does not scale sharply with mirror diameter.

Ammons, S M; Hart, M; Coughenour, B; Romeo, R; Martin, R; Rademacher, M

2011-09-12T23:59:59.000Z

163

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

Science Conference Proceedings (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

164

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

165

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

E-Print Network (OSTI)

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

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

2007-07-10T23:59:59.000Z

166

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

SciTech Connect

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

167

Metrology for x-ray telescope mirrors in a vertical configuration  

Science Conference Proceedings (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

168

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

169

Technology of direct conversion for mirror reactor end-loss plasma  

DOE Green Energy (OSTI)

Design concepts are presented for plasma direct convertors (PDC) intended primarily for use on the end-loss plasma from tandem-mirror reactors. Recent experimental results confirm most of these design concepts. Both a one-stage and a two-stage PDC were tested in reactor-like conditions using a 100-kV, 6-kW ion beam. In a separate test on the end of the TMX machine, a single stage PDC recovered 79 W for a net efficiency of 50%. Tandem mirror devices are well suited to PDC. The high minimum energy of the end-loss ions, the magnetic expansion outside the mirrors, and the vacuum conditions in the end tanks required by the confined plasma, all preexist. The inclusion of a PDC is therefore a rather small addition. These facts and the scale parameters for a PDC are discussed.

Barr, W.L.; Moir, R.W.

1980-10-07T23:59:59.000Z

170

Safety and power multiplication aspects of mirror fusion-fission hybrids  

SciTech Connect

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

171

Effect of imperfect Faraday mirrors on security of a Faraday-Michelson quantum cryptography system  

E-Print Network (OSTI)

The one-way Faraday-Michelson system is a very useful practical quantum cryptography system where Faraday mirrors(FMs) play an important role. In this paper we analyze the security of this system against imperfect FMs. We consider the security loophole caused by the imperfect FMs in Alice's and Bob's security zones. Then we implement a passive Faraday mirror attack in this system. By changing the values of the imperfection parameters of Alice's FMs, we calculate the quantum bit error rate between Alice and Bob induced by Eve and the probability that Eve obtains outcomes successfully. It is shown that the imperfection of one of Alice's two FMs makes the system sensitive to the attack. At last we give a modified key rate as a function of the Faraday mirror imperfections. The security analysis indicates that both Alice's and Bob's imperfect FMs can compromise the secure key.

Wang Weilong; Gao Ming; Ma Zhi

2013-10-29T23:59:59.000Z

172

Streaming-plasma measurements in the Baseball II-T mirror experiment  

SciTech Connect

The warm plasma from a deuterium-loaded titanium washer gun, streaming along magnetic-field lines through the steady-state magnetic well of Baseball II, has been examined for its suitability in this experimental situation as a target plasma for hot-ion buildup experiments and for microinstability control. The gun was positioned near the magnetic axis outside the mirror region. Measurements were made with gridded, end-loss detectors placed outside the opposite mirror, a microwave interferometer, a beam-attenuation detector, and other diagnostics.

Damm, C.C.; Foote, J.H.; Futch, A.H.; Goodman, R.K.; Hornady, R.S.; Osher, J.E.; Porter, G.D.

1977-05-09T23:59:59.000Z

173

Cooling of a mirror in cavity optomechanics with a chirped pulse  

SciTech Connect

We investigate the response of a harmonically confined mirror to an optical pulse in cavity optomechanics. We show that when the pulsed coupling strength takes the form of a chirped pulse, thermal fluctuations of the mirror can be significantly transferred to the cavity field. In addition, the frequency modulation of the pulse could enable a better cooling performance by suppressing the sensitivity of the dependence of detuning and pulse areas. Using numerical investigations, we find that the pulsed cooling is mainly limited by the cavity-field decay rate.

Liao, Jie-Qiao; Law, C. K. [Department of Physics and Institute of Theoretical Physics, The Chinese University of Hong Kong, Shatin, Hong Kong Special Administrative Region (China)

2011-11-15T23:59:59.000Z

174

Temperature Anisotropy in a Shocked Plasma: Mirror-Mode Instabilities in the Heliosheath  

E-Print Network (OSTI)

We show that temperature anisotropies induced at a shock can account for interplanetary and planetary bow shock observations. Shocked plasma with enhanced plasma beta is preferentially unstable to the mirror mode instability downstream of a quasi-perpendicular shock and to the firehose instability downstream of a quasi-parallel shock, consistent with magnetic fluctuations observed downstream of a large variety of shocks. Our theoretical analysis of the solar wind termination shock suggests that the magnetic holes observed by Voyager 1 in the heliosheath are produced by the mirror mode instability. The results are also of astrophysical interest, providing an energy source for plasma heating.

Liu, Y; Belcher, J W; Kasper, J C

2007-01-01T23:59:59.000Z

175

Reconstruction of Neutral Hydrogen Density Profiles in HANBIT Magnetic Mirror Device Using Bayesian Probability Theory  

SciTech Connect

Hydrogen is the main constitute of plasmas in HANBIT magnetic mirror device, therefore, measurement of the emission from excited levels of hydrogen atoms is an important diagnostic tool. From the emissivity of H{sub {alpha}} radiation one can derive quantities such as the neutral hydrogen density and the source rate. An unbiased and consistent probability theory based approach within the framework of Bayesian inference is applied to the reconstruction of H{sub {alpha}} emissivity profiles and hydrogen neutral density profiles in HANBIT magnetic mirror device.

Yoon, J.-S.; Seo, D.-C.; Na, H.-K.; Yoon, S.-W. [Korea Basic Science Institute (Korea, Republic of)

2005-01-15T23:59:59.000Z

176

Antihydrogen and mirror-trapped antiproton discrimination: Discriminating between antihydrogen and mirror-trapped antiprotons in a minimum-B trap  

E-Print Network (OSTI)

Recently, antihydrogen atoms were trapped at CERN in a magnetic minimum (minimum-B) trap formed by superconducting octupole and mirror magnet coils. The trapped antiatoms were detected by rapidly turning off these magnets, thereby eliminating the magnetic minimum and releasing any antiatoms contained in the trap. Once released, these antiatoms quickly hit the trap wall, whereupon the positrons and antiprotons in the antiatoms annihilated. The antiproton annihilations produce easily detected signals; we used these signals to prove that we trapped antihydrogen. However, our technique could be confounded by mirror-trapped antiprotons, which would produce seemingly-identical annihilation signals upon hitting the trap wall. In this paper, we discuss possible sources of mirror-trapped antiprotons and show that antihydrogen and antiprotons can be readily distinguished, often with the aid of applied electric fields, by analyzing the annihilation locations and times. We further discuss the general properties of antiproton and antihydrogen trajectories in this magnetic geometry, and reconstruct the antihydrogen energy distribution from the measured annihilation time history.

C. Amole; G. B. Andresen; M. D. Ashkezari; M. Baquero-Ruiz; W. Bertsche; E. Butler; C. L. Cesar; S. Chapman; M. Charlton; A. Deller; S. Eriksson; J. Fajans; T. Friesen; M. C. Fujiwara; D. R. Gill; A. Gutierrez; J. S. Hangst; W. N. Hardy; M. E. Hayden; A. J. Humphries; R. Hydomako; L. Kurchaninov; S. Jonsell; N. Madsen; S. Menary; P. Nolan; K. Olchanski; A. Olin; A. Povilus; P. Pusa; F. Robicheaux; E. Sarid; D. M. Silveira; C. So; J. W. Storey; R. I. Thompson; D. P. van der Werf; J. S. Wurtele

2012-01-18T23:59:59.000Z

177

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

SciTech Connect

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

178

Mirrored arbiter architecture: a network architecture for large scale multiplayer games  

Science Conference Proceedings (OSTI)

Massively Multiplayer games become increasingly popular. Different multiplayer games are implemented on top of different network architectures based on the characteristics of the games. Typically, multiplayer games run on Client-Server (CS), Peer-to-Peer ... Keywords: interest management techniques, massively multiplayer games, mirrored-arbiter architecture, multicast

Lan Yang; Peerapong Sutinrerk

2007-07-01T23:59:59.000Z

179

Plasma wall charge-exchange interactions in the 2XIIB magnetic mirror experiment  

SciTech Connect

Plasma-wall interactions by charge-exchange wall bombardment in the 2XIIB magnetic mirror experiment are discussed. Experimental measurements are modeled with a time-dependent, radial density buildup calculation. A low-density plasma sufficient to help shield the hot interior plasma from cold-gas erosion, as required by the model, is measured.

Stallard, B.W.; Coensgen, F.H.; Cummins, W.F.; Gormezano, C.; Logan, B.G.; Molvik, A.W.; Nexsen, W.E.; Simonen, T.C.; Turner, W.C.

1976-01-01T23:59:59.000Z

180

Design of GA thermochemical water-splitting process for the Mirror Advanced Reactor System  

DOE Green Energy (OSTI)

GA interfaced the sulfur-iodine thermochemical water-splitting cycle to the Mirror Advanced Reactor System (MARS). The results of this effort follow as one section and part of a second section to be included in the MARS final report. This section describes the process and its interface to the reactor. The capital and operating costs for the hydrogen plant are described.

Brown, L.C.

1983-04-01T23:59:59.000Z

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.


181

ALPHA CHANNELING IN MIRROR MACHINES AND IN TOKAMAKS Nathaniel J. Fisch  

E-Print Network (OSTI)

Particles by Waves," Nuclear Fusion 34, 1541 (1994). [4] N. J. FISCH, "Theory of RF Current-Drive," Reviews as a way of achieving considerably higher performance in tokamak fusion reactors, and similar possibilities might be expected in mirror reactors. I. Introduction In tokamaks, operation in the hot ion mode, where

182

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

E-Print Network (OSTI)

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

Enya, Keigo; Kaneda, Hidehiro; Onaka, Takashi; Ozaki, Tuyoshi; Kume, Masami

2007-01-01T23:59:59.000Z

183

ver the last few years, the helical mirror or "spinner" has become a popular decora-  

E-Print Network (OSTI)

is a good teaching tool. To facilitate student exploration, we suggest some questions and provide brief is for the convex (concave) cross section. For distant objects (dobj >> f ), the magnitudes of both magnifications in the denominator means that more distant objects are less magnified, which also occurs for other magnifying mirrors

DeWeerd, Alan

184

kMemvisor: flexible system wide memory mirroring in virtual environments  

Science Conference Proceedings (OSTI)

Today's commercial cloud service providers require the availability with an annual uptime percentage at least 99.95\\%. While memory errors become norms instead of exceptions with the increasing memory's density and capacity in cloud applications. Thus, ... Keywords: flexible memory mirroring, system-wide high availability

Bin Wang; Zhengwei Qi; Haibing Guan; Haoliang Dong; Wei Sun; Yaozu Dong

2013-06-01T23:59:59.000Z

185

Magnetic fusion energy. [Lectures on status of tokamak and magnetic mirror research  

SciTech Connect

A brief review of fusion research during the last 20 years is given. Some highlights of theoretical plasma physics are presented. The role that computational plasma physics is playing in analyzing and understanding the experiments of today is discussed. The magnetic mirror program is reviewed. (MOW)

McNamara, B.

1977-06-14T23:59:59.000Z

186

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

187

The cylindrical parabolic mirror as reflector for solar collectors. Efficiencies and optimization  

DOE Green Energy (OSTI)

After introducing the concentration ratio and intercept factor of focusing collectors with parabolic cylinder mirrors, the energy balance equations were derived to determine the efficiencies under steady state conditions. The components of the collector were varied and optimized with respect to maximum efficiency. The dynamic behavior of the collector was calculated and the average efficiencies compared with the efficiencies in the steady state condition.

Koehne, R.

1976-10-27T23:59:59.000Z

188

The dual-mirror Small Size Telescope for the Cherenkov Telescope Array  

E-Print Network (OSTI)

In this paper, the development of the dual mirror Small Size Telescopes (SST) for the Cherenkov Telescope Array (CTA) is reviewed. Up to 70 SST, with a primary mirror diameter of 4 m, will be produced and installed at the CTA southern site. These will allow investigation of the gamma-ray sky at the highest energies accessible to CTA, in the range from about 1 TeV to 300 TeV. The telescope presented in this contribution is characterized by two major innovations: the use of a dual mirror Schwarzschild-Couder configuration and of an innovative camera using as sensors either multi-anode photomultipliers (MAPM) or silicon photomultipliers (SiPM). The reduced plate-scale of the telescope, achieved with the dual-mirror optics, allows the camera to be compact (40 cm in diameter), and low-cost. The camera, which has about 2000 pixels of size 6x6 mm^2, covers a field of view of 10{\\deg}. The dual mirror telescopes and their cameras are being developed by three consortia, ASTRI (Astrofisica con Specchi a Tecnologia Replicante Italiana, Italy/INAF), GATE (Gamma-ray Telescope Elements, France/Paris Observ.) and CHEC (Compact High Energy Camera, universities in UK, US and Japan) which are merging their efforts in order to finalize an end-to-end design that will be constructed for CTA. A number of prototype structures and cameras are being developed in order to investigate various alternative designs. In this contribution, these designs are presented, along with the technological solutions under study.

G. Pareschi; G. Agnetta; L. A. Antonelli; D. Bastieri; G. Bellassai; M. Belluso; C. Bigongiari; S. Billotta; B. Biondo; G. Bonanno; G. Bonnoli; P. Bruno; A. Bulgarelli; R. Canestrari; M. Capalbi; P. Caraveo; A. Carosi; E. Cascone; O. Catalano; M. Cereda; P. Conconi; V. Conforti; G. Cusumano; V. De Caprio; A. De Luca; A. Di Paola; F. Di Pierro; D. Fantinel; M. Fiorini; D. Fugazza; D. Gardiol; M. Ghigo; F. Gianotti; S. Giarrusso; E. Giro; A. Grillo; D. Impiombato; S. Incorvaia; A. La Barbera; N. La Palombara; V. La Parola; G. La Rosa; L. Lessio; G. Leto; S. Lombardi; F. Lucarelli; M. C. Maccarone; G. Malaguti; G. Malaspina; V. Mangano; D. Marano; E. Martinetti; R. Millul; T. Mineo; A. MistÒ; C. Morello; G. Morlino; M. R. Panzera; G. Rodeghiero; P. Romano; F. Russo; B. Sacco; N. Sartore; J. Schwarz; A. Segreto; G. Sironi; G. Sottile; A. Stamerra; E. Strazzeri; L. Stringhetti; G. Tagliaferri; V. Testa; M. C. Timpanaro; G. Toso; G. Tosti; M. Trifoglio; P. Vallania; S. Vercellone; V. Zitelli; For The Astri Collaboration; J. P. Amans; C. Boisson; C. Costille; J. L. Dournaux; D. Dumas; G. Fasola; O. Hervet; J. M. Huet; P. Laporte; C. Rulten; H. Sol; A. Zech; For The Gate Collaboration; R. White; J. Hinton; D. Ross; J. Sykes; S. Ohm; J. Schmoll; P. Chadwick; T. Greenshaw; M. Daniel; G. Cotter; G. S. Varner; S. Funk; J. Vandenbroucke; L. Sapozhnikov; J. Buckley; P. Moore; D. Williams; S. Markoff; J. Vink; D. Berge; N. Hidaka; A. Okumura; H. Tajima; For The Chec Collaboration; For The Cta Consortium

2013-07-18T23:59:59.000Z

189

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

Science Conference Proceedings (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

190

Amazing Mirrors and Superlative Supercomputers | U.S. DOE Office of Science  

Office of Science (SC) Website

Amazing Amazing Mirrors and Superlative Supercomputers News Featured Articles 2014 2013 2012 2011 2010 2009 2008 2007 2006 2005 Science Headlines Presentations & Testimony News Archives Contact Information Office of Science U.S. Department of Energy 1000 Independence Ave., SW Washington, DC 20585 P: (202) 586-5430 11.29.11 Amazing Mirrors and Superlative Supercomputers Argonne's Mira will accelerate scientific discoveries and societal benefits. Print Text Size: A A A Subscribe FeedbackShare Page Click to enlarge photo. Enlarge Photo Mira--Argonne's IBM Blue Gene/Q Courtesy of Argonne National Laboratory Argonne National Laboratory's IBM Blue Gene/Q supercomputer, Mira, is an engineering marvel whose unique architecture and capabilities will be thoroughly explored as soon as it goes online in 2012. Supported by the

191

Performance of 3-Sun Mirror Modules on Sun Tracking Carousels on Flat Roof Buildings  

Science Conference Proceedings (OSTI)

Commercial buildings represent a near term market for cost competitive solar electric power provided installation costs and solar photovoltaic module costs can be reduced. JX Crystals has developed a carousel sun tracker that is prefabricated and can easily be deployed on building flat roof tops without roof penetration. JX Crystals is also developing 3-sun PV mirror modules where less expensive mirrors are substituted for two-thirds of the expensive single crystal silicon solar cell surface area. Carousels each with four 3-sun modules have been set up at two sites, specifically at Oak Ridge National Lab and at the University of Nevada in Las Vegas. The test results for these systems are presented.

Fraas, Dr. Lewis [JX Crystals, Inc.; Avery, James E. [JX Crystals, Inc.; Minkin, Leonid M [ORNL; Maxey, L Curt [ORNL; Gehl, Anthony C [ORNL; Hurt, Rick A [ORNL; Boehm, Robert F [ORNL

2008-01-01T23:59:59.000Z

192

Geometry and heterogeneous effects on the neutronic performance of a Yin Yang mirror-reactor blanket  

SciTech Connect

From 5th symposium on engineering problems of fusion research; Princeton, New Jersey, USA (6 Nov 1973). Two-dimensional models and Monte Carlo neutron transport techniques were used to calculate the tritium breeding and energy generation in a mirror-reactor blanket. Results indicate that blanket performance should be quite insensitive to variations in overall geometry as long as there are no large neutron-leakage paths. Injection and leakage penetration can be accommodated as long as the first-wall peneiration area subtends less than 25% of the first wall's spherical area. Heterogeneous and streaming effects in a tubular blanket can be important, but are negligible for closely packed arrays of tubes. The one-dimensional homogeneous spherical-shell model appears to be a useful tool for predicting performance of a tubular blanket conforming to the YinYang mirror geometry. (auth)

Lee, J.D.

1973-10-17T23:59:59.000Z

193

Study And Comparison Of Silver Mirrors Deposited On Different Substrates By Electron-Beam Gun Method  

SciTech Connect

Choosing the right substrate is one of the important factors for improving quality parameters of thin films such as adhesion between layers and substrates. The selected substrate should have proper physical and chemical compatibility with deposited thin film. In this paper, we have been investigated four different types of high reflective laser mirrors that were produced in similar conditions on four different kinds of substrates including copper, stainless steel, brass, and nickel. We used electron-beam gun method for deposition of silver layers. At the end we compared theoretical results with practical results that were yielded by laser damage threshold test. It was shown that brass is the best choice for silver metal mirrors as a substrate.

Asl, Jahanbakhsh Mashaiekhy; Shafieizadeh, Zahra; Sabbaghzadeh, Jamshid; Anaraki, Mahdi [Iranian National Center for Laser Science and Technology, PO Box 14665-576, Tehran (Iran, Islamic Republic of)

2010-12-23T23:59:59.000Z

194

Use of a mirror as the first optical component for an undulator beamline at the APS  

SciTech Connect

In the design of Sector II of the Synchrotron Radiation Instrumentation (SRI) CAT, an x-ray mirror with multiple coatings is chosen as the first optical component of the undulator beamline. Two significant advantages of using the mirror are: A significant reduction in the peak radiation heat flux and total power on the downstream monochromator, and (2) availability of the wide-bandpass undulator spectrum between 0--30 key to experimental stations with substantially reduced radiation shielding requirements. The second advantage also allows us to place the monochromator outside the first optics enclosure (FOE) at a large distance from the source to further reduce the peak heat flux on the monochromator. The combined effect is that the inclined crystal monochromator may not be necessary, and a multilayer monochromator can be used because the expected heat fluxes are less than the value that has been demonstrated for those monochromators.

Yun, W.; Khounsary, A.; Lai, B.; Gluskin, E.

1992-09-01T23:59:59.000Z

195

Photothermal and thermo-refractive effects in high reflectivity mirrors at room and cryogenic temperature  

E-Print Network (OSTI)

Increasing requirements in the sensitivity of interferometric measurements is a common feature of several research fields, from gravitational wave detection to quantum optics. This motivates refined studies of high reflectivity mirrors and of noise sources that are tightly related to their structure. In this work we present an experimental characterization of photothermal and thermo-refractive effects in high reflectivity mirrors, i.e., of the variations in the position of their effective reflection plane due to weak residual power absorption. The measurements are performed by modulating the impinging power in the range 10 Hz $\\div$ 100 kHz. The experimental results are compared with an expressly derived theoretical model in order to fully understand the phenomena and exploit them to extract useful effective thermo-mechanical parameters of the coating. The measurements are extended at cryogenic temperature, where most high sensitivity experiments are performed (or planned in future versions) and where characterizations of dielectric film coatings are still poor.

Alessandro Farsi; Mario Siciliani de Cumis; Francesco Marino; Francesco Marin

2011-09-21T23:59:59.000Z

196

Photothermal and thermo-refractive effects in high reflectivity mirrors at room and cryogenic temperature  

E-Print Network (OSTI)

Increasing requirements in the sensitivity of interferometric measurements is a common feature of several research fields, from gravitational wave detection to quantum optics. This motivates refined studies of high reflectivity mirrors and of noise sources that are tightly related to their structure. In this work we present an experimental characterization of photothermal and thermo-refractive effects in high reflectivity mirrors, i.e., of the variations in the position of their effective reflection plane due to weak residual power absorption. The measurements are performed by modulating the impinging power in the range 10 Hz $\\div$ 100 kHz. The experimental results are compared with an expressly derived theoretical model in order to fully understand the phenomena and exploit them to extract useful effective thermo-mechanical parameters of the coating. The measurements are extended at cryogenic temperature, where most high sensitivity experiments are performed (or planned in future versions) and where charact...

Farsi, Alessandro; Marino, Francesco; Marin, Francesco

2011-01-01T23:59:59.000Z

197

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

DOE Green Energy (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

198

Synfuels from fusion: using the tandem mirror reactor and a thermochemical cycle to produce hydrogen  

Science Conference Proceedings (OSTI)

This study is concerned with the following area: (1) the tandem mirror reactor and its physics; (2) energy balance; (3) the lithium oxide canister blanket system; (4) high-temperature blanket; (5) energy transport system-reactor to process; (6) thermochemical hydrogen processes; (7) interfacing the GA cycle; (8) matching power and temperature demands; (9) preliminary cost estimates; (10) synfuels beyond hydrogen; and (11) thermodynamics of the H/sub 2/SO/sub 4/-H/sub 2/O system. (MOW)

Werner, R.W. (ed.)

1982-11-01T23:59:59.000Z

199

Parabolic lithium mirror for a laser-driven hot plasma producing device  

DOE Patents (OSTI)

A hot plasma producing device is provided, wherein pellets, singly injected, of frozen fuel are each ignited with a plurality of pulsed laser beams. Ignition takes place within a void area in liquid lithium contained within a pressure vessel. The void in the liquid lithium is created by rotating the pressure vessel such that the free liquid surface of molten lithium therein forms a paraboloid of revolution. The paraboloid functions as a laser mirror with a reflectivity greater than 90%. A hot plasma is produced when each of the frozen deuterium-tritium pellets sequentially arrive at the paraboloid focus, at which time each pellet is illuminated by the plurality of pulsed lasers whose rays pass through circular annuli across the top of the paraboloid. The beams from the lasers are respectively directed by associated mirrors, or by means of a single conical mirror in another embodiment, and by the mirror-like paraboloid formed by the rotating liquid lithium onto the fuel pellet such that the optical flux reaching the pellet can be made to be uniform over 96% of the pellet surface area. The very hot plasma produced by the action of the lasers on the respective singly injected fuel pellets in turn produces a copious quantity of neutrons and X-rays such that the device has utility as a neutron source or as an x-ray source. In addition, the neutrons produced in the device may be utilized to produce tritium in a lithium blanket and is thus a mechanism for producing tritium.

Baird, James K. (Clinton, TN)

1979-06-19T23:59:59.000Z

200

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

Science Conference Proceedings (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

Note: This page contains sample records for the topic "appendages mirrors bumpers" from the National Library of EnergyBeta (NLEBeta).
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201

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

202

Production of field-reversed mirror plasma with a coaxial plasma gun  

SciTech Connect

The use of a coaxial plasma gun to produce a plasma ring which is directed into a magnetic field so as to form a field-reversed plasma confined in a magnetic mirror. Plasma thus produced may be used as a target for subsequent neutral beam injection or other similarly produced and projected plasma rings or for direct fusion energy release in a pulsed mode.

Hartman, Charles W. (Alamo, CA); Shearer, James W. (Livermore, CA)

1982-01-01T23:59:59.000Z

203

Octupole coil configuration for the Tandem Mirror Experiment Upgrade (TMX-U)  

Science Conference Proceedings (OSTI)

The octupole plug concept offers the attractive possibility of reducing the length of the plug and transition sections in tandem mirror reactors. In the Tandem Mirror Experiment Upgrade (TMX-U), we are designing an octupole plug-transition that will replace our current quadrupole plug-transition. The reduction in length is made possible by the more nearly circular plasma cross section throughout the plug and transition sections. The principal physics of the design is the magnetohydrodynamic (MHD) stabilization of the core plasma in the plug by a hot electron ring in the mantle region surrounding the core. This hot electron mantle is MHD stable because of the good curvature field lines provided by the octupole. The positive radial pressure gradient in the hot electron mantle in turn stabilizes the core's plasma. Each octupole set consists of six coils replacing the transition and plug sets in the existing TMX-U experiment. The central cell coils will remain unchanged. Five of the coils for each of the new sets will be fabricated, while one, the 6-T mirror coil, will be reused from TMX-U. This paper will elaborate on the design configuration of the magnets. In particular, the configuration provides for adequate neutral beam lines-of-sight, and access for 0.615 MW of electron-cyclotron resonant heating (ECRH) on each end.

Wong, R.L.; Calderon, M.O.; Felker, B.; Jackson, M.C.; Pedrotti, L.R.

1985-11-14T23:59:59.000Z

204

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

DOE Green Energy (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

205

Optical losses of solar mirrors due to atmospheric contamination at Liberal, Kansas and Oologah, Oklahoma  

DOE Green Energy (OSTI)

An assessment is presented of the effect of outdoor exposure on mirrors located at two sites selected for potential solar cogeneration/repowering facilities: Liberal, Kansas and Oologah, Oklahoma. Mirror coupons were placed on tracking heliostat simulators located in the proposed heliostat fields and were removed periodically. The spectral hemispherical and diffuse reflectances of these coupons were measured. Representative samples were analyzed for the chemical composition of the dust particulates using SEM/EDX. Other samples were washed with a high pressure spray and recharacterized to determine the effects of the residual dust. Average specular reflectance losses over the entire test period (up to 504 days) were 6 to 12%, with a range of 1 to 30%. Specular reflectance losses varied widely from day to day depending on local weather conditions. The losses due to scattering were 2 to 5 times greater than the losses due to absorptance. The average degradation rate over the first thirty days was an order of magnitude larger than the average degradation rate over the entire sampling period. Specular reflectance loss rates averaged 0.5% per day and greater between periods of natural cleaning. The chemical composition of the dust on the mirrors was characteristic of the indigenous soil, with some samples also showing the presence of sulfur and chlorine, possibly from cooling tower drift.

Dake, L.S.; Lind, M.A.

1981-09-01T23:59:59.000Z

206

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

Science Conference Proceedings (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

207

Comparison of the effect of outdoor exposure on the optical properties of solar mirrors and transparent encapsulant materials  

DOE Green Energy (OSTI)

The effects of outdoor exposure on solar mirrors and transparent encapsulant materials are assessed and compared. The encapsulant materials tested included glasses, polymers and silicones. Samples of the materials were placed on stationary exposure racks in six locations that represented urban, desert, oceanside and high altitude mountain areas. Samples were removed periodically for optical characterizations. The spectral hemispherical and diffuse reflectance of the mirror samples and the spectral hemispherical transmittance and diffuse reflectance of the encapsulant materials was measured. The relative normal hemispherical transmittance of the encapsulant materials was measured. Correlations between the glass and mirror data showed that the average diffuse reflectance losses were six times larger for the mirrors than for the glass samples. The average specular reflectance losses for the mirror samples were seven times as large as the average hemispherical transmittance losses for the glass samples. These correlations may enable one to predict the performance of mirrors made using the other encapsulant materials for superstrates. It was found that the urban and oceanside sites were the dirtiest, while the desert and mountain sites were the cleanest. Average specular reflectance losses varied from 4% at the cleanest site to 50% at the dirtiest site. The range in hemispherical transmittance losses for the encapsulant materials varied between 0% and 6%. At one site, the average daily specular reflectance losses were .04% for the mirror samples and average daily hemispherical transmittance losses were about .01% for the glass samples. The polymer materials degraded somewhat more rapidly than the glasses, and the silicones irreversible degraded too rapidly and severely to be useful for either photovoltaic or solar thermal applications.

Dake, L.S.; Lind, M.A.; Maag, C.R.

1981-09-01T23:59:59.000Z

208

Hot-electron plasma formation and confinement in the tandem mirror experiment-upgrade  

Science Conference Proceedings (OSTI)

The tandem mirror experiment-upgrade (TMX-U) at the Lawrence Livermore National Laboratory (LLNL) is the first experiment to investigate the thermal-barrier tandem-mirror concept. One attractive feature of the tandem magnetic mirror as a commercial power reactor is that the fusion reactions occur in an easily accessible center-cell. On the other hand, complicated end-cells are necessary to provide magnetohydrodynamic (MHD) stability and improved particle confinement of the center-cell plasma. In these end-cells, enhanced confinement is achieved with a particular axial potential profile that is formed with electron-cyclotron range-of-frequency heating (ECRF heating, ECRH). By modifying the loss rates of electrons at spatially distinct locations within the end-cells, the ECRH can tailor the plasma potential profile in the desired fashion. Specifically, the thermal-barrier concept requires generation of a population of energetic electrons near the midplane of each end-cell. To be effective, the transverse (to the magnetic field) spatial structure of the hot-electron plasma must be fairly uniform. In this dissertation we characterize the spatial structure of the ECRH-generated plasma, and determine how the structure builds up in time. Furthermore, the plasma should efficiently absorb the ECRF power, and a large fraction of the electrons must be well confined near the end-cell midplane. Therefore, we also examine in detail the ECRH power balance, determining how the ECRF power is absorbed by the plasma, and the processes through which that power is confined and lost. 43 refs., 69 figs., 6 tabs.

Ress, D.B.

1988-06-01T23:59:59.000Z

209

Effect of soiling on solar mirrors and techniques used to maintain high reflectivity  

DOE Green Energy (OSTI)

Solar mirrors are used to concentrate low-level solar radiation to power levels which are practical and efficient for consumption. Any interference with the collection of that energy not only decreases the power level but also increases the cost of the energy available from a solar power system. One of the most immediate and drastic effects of outdoor exposure is the reflectance loss due to the accumulation of foreign particles on the mirror surface. Specular reflectance losses as great as 25% have been observed for mirrors exposed for only a few weeks. The effect of the deposited particles is to reduce the reflected energy by both absorbing and scattering light. The degree to which the particles reduce the collection of reflected energy depends on their composition, number and size distribution. An additional factor is the optics of the collection system. The angular acceptance aperture of the system, defined as the angle subtended by the receiver at the concentrator surface, determines the relative importance of the scattering due to dust accumulation. For flat plate thermal and photovoltaic collectors which have essentially a 180/sup 0/ angular acceptance aperture, scattering of the incident light is not critical but absorption can be an important factor in the loss of energy. For concentrating collection systems, such as line focus collectors and central receivers, angular acceptance apertures of a few degrees make scattering at the concentrator surface much more important and can result in severe energy losses. Results of a study of each of these areas are presented and discussed. (WHK)

Roth, E.P.; Pettit, R.B.

1980-06-01T23:59:59.000Z

210

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

Science Conference Proceedings (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

211

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

212

Cleanable and Hardcoat Coatings for Increased Durability of Silvered Polymeric Mirrors  

SciTech Connect

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

213

On the mirror instability in the presence of electron temperature anisotropy  

Science Conference Proceedings (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

214

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

SciTech Connect

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

215

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

SciTech Connect

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

216

Three Extra Mirror or Sequential Families: Case for a Heavy Higgs Boson and Inert Doublet  

Science Conference Proceedings (OSTI)

We study the possibility of the existence of extra fermion families and an extra Higgs doublet. We find that requiring the extra Higgs doublet to be inert leaves space for three extra families, allowing for mirror fermion families and a dark matter candidate at the same time. The emerging scenario is very predictive: It consists of a standard model Higgs boson, with a mass above 400 GeV, heavy new quarks between 340 and 500 GeV, light extra neutral leptons, and an inert scalar with a mass below M{sub Z}.

Martinez, Homero [CEA, Saclay, DSM-IRFU-SPP (France); Melfo, Alejandra [ICTP, Trieste (Italy); Universidad de Los Andes, Merida (Venezuela, Bolivarian Republic of); Nesti, Fabrizio [Universita di Ferrara, Ferrara (Italy); Senjanovic, Goran [ICTP, Trieste (Italy)

2011-05-13T23:59:59.000Z

217

Survey mirrors and lenses and their required surface accuracy. Semiannual technical progress report, September 15, 1978-April 15, 1979  

DOE Green Energy (OSTI)

Since the beginning of widespread research and development for solar energy, a major concern has been the effect of optical and surface quality of collector materials on collector performance and the changes in these properties due to environmental conditions. In many instances, this type of data has not been compiled. When data is available on surface quality, mirror or lens optical characteristics, surface deformations due to stress and other errors, it is difficult to quantify the effect these have on a particular concentrator design performance. To further investigate these errors, Honeywell is performing a study of concentrator designs and mirror and lens surfaces. There are two taks within this program. The first task involves investigation and evaluation of concentrator performance. Within this task, Honeywell has conducted a survey of the literature, solar manufacturers and government information to obtain data on existing concentrator designs (i.e., V-troughs, parabolic mirror concentrators) and lens and mirror materials. Ten collector configurations have been selected to be mathematically modeled. These models will be incorporated into existing ray trace software and will be used to evaluate concentrator performance. Optical quality properties, structural deformations due to loading and stress, tracking errors and material property changes due to the environment will be included in this assessment of performance. The second task involves the expansion of an existing data base on mirror degradation due to environmental exposure and the collection of similar information on lenses. Status of the program is reported. (WHK)

None

1979-05-01T23:59:59.000Z

218

Economic significance of Q for mirror reactors: combinations of Q and M which look promising  

SciTech Connect

This term Q is the ratio of the fusion powder produced to the power input. It is a driven device. Q is truly the success parameter for mirrors--widely discussed but not succinctly specified as to required value. The problem is that Q can be treated as a subjective parameter--there are many milestone Qs; for scientific demonstration, for breakeven power, etc. Yet for a successful reactor, there is only one Q and that is the Q which produces mirror fusion power at the busbar that is less than the cost of delivered power in mills/kwhr by other means. We call this Q/sub PRACTICAL/ and believe there is a convincing argument that says this Q/sub PRACTICAL/ can be about 5.0 even assuming modest efficiencies for system components. A direct convertor is necessary. If the direct convertor were deleted, a Q/sub PRACTICAL/ of approximately 7.5 would be required. If we wish to soften the value of Q further, then the technical logic for the fusion fission hybrid is very powerful. With the hybrid a Q/sub PRACTICAL/ of 1.5 to 2.0 appears to be a very reasonable value. The key in being able to specify values of Q/sub PRACTICAL/ lies in economically comparing the capital cost of fusion power to the sum of the capital cost and the present value of all the fuel costs for the competitive fuel intensive plants.

Werner, R.W.

1978-09-11T23:59:59.000Z

219

Detecting H{yields}hh in the mirror model at the CERN Large Hadron Collider  

SciTech Connect

The Higgs sector may play an important role in detecting mirror particles, which can be the candidates of dark matter and appear as missing energy in the detectors at the LHC. In this paper we worked out the Higgs boson spectrum and the Higgs couplings for the symmetric vacuum, namely v{sub 1}=v{sub 2}=v, in the mirror model, and investigated the constraints from electroweak precision observables. Our study showed that electroweak precision observables have already constrained the Higgs boson sector severely. We then explored the Higgs boson phenomenology, and focused on the scenario that the heavier Higgs boson H can decay into a pair of lighter Higgs bosons h. We proposed to study the invisible decay of the Higgs boson via the pair production of them, in which one Higgs boson decays into bottom quarks and the other decays invisibly. Our detail simulation for signals and backgrounds showed that the observation of the signal can reach 5{sigma} significance for m{sub H}=260 GeV and m{sub h}=115 GeV with 10 fb{sup -1} integrated luminosity at the LHC. Moreover the possible method to further suppress dominant Zbb background was discussed. We also simulated the signals and backgrounds for H{yields}hh{yields}4b. Our results showed that it is very difficult to isolate the signals from huge QCD continuum backgrounds.

Li Wensheng; Yin Pengfei; Zhu Shouhua [Institute of Theoretical Physics, School of Physics, Peking University, Beijing 100871 (China)

2007-11-01T23:59:59.000Z

220

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

Science Conference Proceedings (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

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221

Large N Duality, Mirror Symmetry, and a Q-deformed A-polynomial for Knots.  

E-Print Network (OSTI)

We reconsider topological string realization of SU(N) Chern-Simons theory on S^3. At large N, for every knot K in S^3, we obtain a polynomial A_K(x,p;Q) in two variables x,p depending on the t'Hooft coupling parameter Q=e^{Ng_s}. Its vanishing locus is the quantum corrected moduli space of a special Lagrangian brane L_K, associated to K, probing the large N dual geometry, the resolved conifold. Using a generalized SYZ conjecture this leads to the statement that for every such Lagrangian brane L_K we get a distinct mirror of the resolved conifold given by uv=A_K(x,p;Q). Perturbative corrections of the refined B-model for the open string sector on the mirror geometry capture BPS degeneracies and thus the knot homology invariants. Thus, in terms of its ability to distinguish knots, the classical function A_K(x,p;Q) contains at least as much information as knot homologies. In the special case when N=2, our observations lead to a physical explanation of the generalized (quantum) volume conjecture. Moreover, the specialization to Q=1 of A_K contains the classical A-polynomial of the knot as a factor.

222

Model simulations of continuous ion injection into electron-beam ion source trap with slanted electrostatic mirror  

Science Conference Proceedings (OSTI)

The efficiency of trapping ions in an electron-beam ion source (EBIS) is of primary importance for many applications requiring operations with externally produced ions: RIA breeders, ion sources, and traps. At the present time, the most popular method of ion injection is pulsed injection, when short bunches of ions get trapped in a longitudinal trap while traversing the trap region. Continuous trapping is a challenge for EBIS devices because mechanisms which reduce the longitudinal ion energy per charge in a trap (cooling with residual gas, energy exchange with other ions, and ionization) are not very effective, and accumulation of ions is slow. A possible approach to increase trapping efficiency is to slant the mirror at the end of the trap which is opposite to the injection end. A slanted mirror will convert longitudinal motion of ions into transverse motion, and, by reducing their longitudinal velocity, prevent these ions from escaping the trap on their way out. The trade-off for the increased trapping efficiency this way is an increase in the initial transverse energy of the accumulated ions. The slanted mirror can be realized if the ends of two adjacent electrodes, drift tubes, which act as an electrostatic mirror, are machined to produce a slanted gap, rather than an upright one. Applying different voltages to these electrodes will produce a slanted mirror. The results of two-dimensional (2D) and three-dimensional (3D) computer simulations of the ion injection into an EBIS are presented using simplified models of an EBIS with conical (2D simulations) and slanted (3D simulations) mirror electrodes.

Pikin, A.; Kponou, A.; Alessi, J. G.; Beebe, E. N.; Prelec, K.; Raparia, D. [Brookhaven National Laboratory, Upton, New York 11973 (United States)

2008-02-15T23:59:59.000Z

223

The hybrid reactor project based on the straight field line mirror concept  

SciTech Connect

The straight field line mirror (SFLM) concept is aiming towards a steady-state compact fusion neutron source. Besides the possibility for steady state operation for a year or more, the geometry is chosen to avoid high loads on materials and plasma facing components. A comparatively small fusion hybrid device with 'semi-poor' plasma confinement (with a low fusion Q factor) may be developed for industrial transmutation and energy production from spent nuclear fuel. This opportunity arises from a large fission to fusion energy multiplication ratio, Q{sub r} = P{sub fis}/P{sub fus}>>1. The upper bound on Q{sub r} is primarily determined by geometry and reactor safety. For the SFLM, the upper bound is Q{sub r} Almost-Equal-To 150, corresponding to a neutron multiplicity of k{sub eff}=0.97. Power production in a mirror hybrid is predicted for a substantially lower electron temperature than the requirement T{sub e} Almost-Equal-To 10 keV for a fusion reactor. Power production in the SFLM seems possible with Q Almost-Equal-To 0.15, which is 10 times lower than typically anticipated for hybrids (and 100 times smaller than required for a fusion reactor). This relaxes plasma confinement demands, and broadens the range for use of plasmas with supra-thermal ions in hybrid reactors. The SFLM concept is based on a mirror machine stabilized by qudrupolar magnetic fields and large expander tanks beyond the confinement region. The purpose of the expander tanks is to distribute axial plasma loss flow over a sufficiently large area so that the receiving plates can withstand the heat. Plasma stability is not relying on a plasma flow into the expander regions. With a suppressed plasma flow into the expander tanks, a possibility arise for higher electron temperature. A brief presentation will be given on basic theory for the SFLM with plasma stability and electron temperature issues, RF heating computations with sloshing ion formation, neutron transport computations with reactor safety margins and material load estimates, magnetic coil designs as well as a discussion on the implications of the geometry for possible diagnostics. Reactor safety issues are addressed and a vertical orientation of the device could assist passive coolant circulation. Specific attention is put to a device with a 25 m long confinement region and 40 cm plasma radius in the mid-plane. In an optimal case (k{sub eff}= 0.97) with a fusion power of only 10 MW, such a device may be capable of producing a power of 1.5 GW{sub th}.

Agren, O.; Noack, K.; Moiseenko, V. E.; Hagnestal, A.; Kaellne, J.; Anglart, H. [Uppsala University, Angstroem Laboratory, Uppsala University, Box 534, SE-751 21 Uppsala (Sweden); Institute of Plasma Physics, National Science Center 'Kharkiv Institute of Physics and Technology', 61108 Kharkiv (Ukraine); Uppsala University, Angstroem Laboratory, Uppsala University, Box 534, SE-751 21 Uppsala (Sweden); Royal Institute of Technology, Nuclear Reactor Technology, SE 100 44 Stockholm (Sweden)

2012-06-19T23:59:59.000Z

224

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

SciTech Connect

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

225

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

226

Synfuels from fusion: producing hydrogen with the tandem mirror reactor and thermochemical cycles  

DOE Green Energy (OSTI)

This report examines, for technical merit, the combination of a fusion reactor driver and a thermochemical plant as a means for producing synthetic fuel in the basic form of hydrogen. We studied: (1) one reactor type - the Tandem Mirror Reactor - wishing to use to advantage its simple central cell geometry and its direct electrical output; (2) two reactor blanket module types - a liquid metal cauldron design and a flowing Li/sub 2/O solid microsphere pellet design so as to compare the technology, the thermal-hydraulics, neutronics and tritium control in a high-temperature operating mode (approx. 1200 K); (3) three thermochemical cycles - processes in which water is used as a feedstock along with a high-temperature heat source to produce H/sub 2/ and O/sub 2/.

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

1981-01-21T23:59:59.000Z

227

Chemical engineering challenges in driving thermochemical hydrogen processes with the tandem mirror reactor  

DOE Green Energy (OSTI)

The Tandem Mirror Reactor is described and compared with Tokamaks, both from a basic physics viewpoint and from the suitability of the respective reactor for synfuel production. Differences and similarities between the TMR as an electricity producer or a synfuel producer are also cited. The Thermochemical cycle chosen to link with the fusion energy source is the General Atomic Sulfur-Iodine Cycle, which is a purely thermal-driven process with no electrochemical steps. There are real chemical engineering challenges of getting this high quality heat into the large thermochemical plant in an efficient manner. We illustrate with some of our approaches to providing process heat via liquid sodium to drive a 1050 K, highly-endothermic, catalytic and fluidized-bed SO/sub 3/ Decomposition Reactor. The technical, economic, and safety tradeoffs that arise are discussed.

Galloway, T.R.; Werner, R.W.

1980-01-01T23:59:59.000Z

228

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

Science Conference Proceedings (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

229

Progress on the conceptual design of a mirror hybrid fusion--fission reactor  

SciTech Connect

A conceptual design study was made of a fusion-fission reactor for the purpose of producing fissile material and electricity. The fusion component is a D-T plasma confined by a pair of magnetic mirror coils in a Yin-Yang configuration and is sustained by neutral beam injection. The neutrons from the fusion plasma drive the fission assembly which is composed of natural uranium carbide fuel rods clad with stainless steel and helium cooled. It was shown conceptually how the reactor might be built using essentially present-day technology and how the uranium-bearing blanket modules can be routinely changed to allow separation of the bred fissile fuel. (MOW)

Moir, R.W.; Lee, J.D.; Burleigh, R.J.

1975-06-25T23:59:59.000Z

230

Sustaining neutral beam power supply system for the Mirror Fusion Test Facility  

SciTech Connect

In late August 1978, a fixed price procurement contract for $25,000,000 was awarded to Aydin Energy Division, Palo Alto, California, for the design, manufacture, installation and acceptance testing of the Lawrence Livermore National Laboratory Mirror Fusion Test Facility (MFTF) Sustaining Neutral Beam Power Supply System (SNBPSS). This system of 24 power supply sets will provide the conditioned power for the 24 neutral beam source modules. Each set will provide the accel potential the arc power, the filament power, and the suppressor power for its associated neutral beam source module. The design and development of the SNBPSS has progressed through the final design phase and is now in production. Testing of the major sub-assembly power supply is proceeding at Aydin and the final acceptance testing of the first two power supplies at LLNL is expected to be completed this year.

Eckard, R.D.; Wilson, J.H.; Van Ness, H.W.

1980-01-01T23:59:59.000Z

231

Demonstration of a linear optical true-time delay device by use of a microelectromechanical mirror array  

E-Print Network (OSTI)

different switchable delays. The organization of this paper is as follows: We start by reviewing the White into the cell. We adapt the White cell to TTD by adding a second White cell and using the MEMS device to switch in a multiple reflection spherical mirror configuration based on the White cell. Divergence is avoided

Anderson, Betty Lise

232

Determination Of Plasma Parameters In The PUPR Mirror and Cusp Plasma Machine Via Electrostatic Probe Methods  

Science Conference Proceedings (OSTI)

Electrostatic probes are constructed for the PUPR Mirror and Cusp Plasma Machine and preliminary measurements of the plasma parameters are obtained. The machine is cylindrical in shape with two copper coils wound around the machine to provide the necessary mirror or cusp field configuration. The plasma is heated using the electron cyclotron heating method at a frequency of 2.45 GHz. I-V characteristics are obtained using single, double, and emissive Langmuir probes in Argon plasma at approximately 1*10-4 Torr and with approximate field strength of {approx} 0.1T at the point cusp. The single and double Langmuir probes consist of 3.5 mm radius stainless steel disks. Characteristics are obtained for the single and double Langmuir probes using a source meter and programming a voltage sweep while recording the current from the digital readout. The emissive probe is constructed by using a tungsten filament and characteristics are obtained in a manner similar to that described for the single and double Langmuir probes. An emission current is superposed on top of the sweeping signal using a DC power source. An electron temperature of approximately 7.5eV is observed in the plasma at a density of {approx}4.0*1014m-3 using the single Langmuir probe. In addition, with the distribution function obtained from the single probe, the plasma potential is observed to be approximately 25-30V. The measurement of 25-30V for the plasma potential is supported by measurements obtained from the emissive probe.

Meyer, Ryan M. [Nuclear Science and Engineering Institute, University of Missouri, Columbia, E2433 Thomas and Nell Lafferre Hall, MO 65210 (United States); Rivera, Miguel A.; Colmenares, Franklyn; Leal, David; Rivera, Ramon; Leal-Quiros, Edbertho [Scientific Research and Development Department, Polytechnic University of Puerto Rico, 377 Ponce de Leon Ave., Hato Rey, PR 00918 (Puerto Rico); Gonzales, Angel [Electrical Engineering Department, Polytechnic University of Puerto Rico, 377 Ponce de Leon Ave., Hato Rey, PR 00918 (Puerto Rico)

2006-12-04T23:59:59.000Z

233

Stabilization of the hot-electron precessional mode in a symmetric tandem mirror by the axial variation of radial electric field  

SciTech Connect

The stability of the hot-electron precessional mode is investigated in the presence of a relative Earrow x Barrow precession between the end cell and the center cell, which is inherent to the tandem-mirror concept. It is found that a positive radial electric field in the end cell is favorable to stability. Under normal conditions, the stability of a hot-electron symmetric tandem mirror is not worse than a quadrupole tandem mirror with the same relative Earrow x Barrow precession.

Tsang, K.T.; Lee, X.S.

1984-11-26T23:59:59.000Z

234

Automatic Mirror Alignment for VIRGO: First experimental demonstration of the Anderson technique on a large-scale interferometer  

E-Print Network (OSTI)

The French-Italian interferometric gravitational wave detector VIRGO is currently being commissioned. Its principal instrument is a Michelson laser interferometer with 3 km long optical cavities in the arms and a power-recycling mirror. The interferometer resides in an ultra-high vacuum system and the mirrors are suspended from multistage pendulums for seismic isolation. This type of laser interferometer reaches its maximum sensitivity only when the optical setup is held actively very accurately at a defined operating point: control systems using the precise interferometer signals stabilise the longitudinal and angular positions of the optical component. This paper gives an overview of the control system for the angular degrees of freedom; we present the current status of the system and report the first experimental demonstration of the Anderson technique on a large-scale interferometer.

A. Freise; for the VIRGO Collaboration

2004-11-24T23:59:59.000Z

235

Slit-mounted LED fiducial system for rotating mirror streak cameras  

SciTech Connect

We have developed a fiducial system for rotating mirror streak cameras that utilizes light emitting diodes mounted at the slit position of the camera. The diodes are driven to the required high brightness by a unique pulse power circuit designed to provide high voltage, high current pulses 18 nanoseconds in length at a frequency of up to 2.5 megahertz. The availability of super bright light emitting diodes with a wavelength of 630 to 640 nanometers allows us to record fiducial pulses, at streaking speeds in excess of 20mm per microsecond, on all the black and white films commonly used in high speed photography. The time marks on the film record are referenced to the real time of the experiment from a clock-driver that controls the start and frequency of the fiducial pulse train and by three adjustable and discreet blanked fiducials. This paper discusses the development of this system and describes the full setup as used at LLNL. 6 refs., 4 figs.

Shaw, L.L.; Muelder, S.A.; Rivera, A.T.

1991-01-01T23:59:59.000Z

236

A spheromak ignition experiment reusing Mirror Fusion Test Facility (MFTF) equipment  

Science Conference Proceedings (OSTI)

Based on available experimental results and theory, a scenario is presented to achieve ohmic ignition in a spheromak by slow ({approximately} 10 sec.) helicity injection using power from the Mirror Fusion Test Facility (MFTF) substation. Some of the other parts needed (vacuum vessel, coils, power supplies, pumps, shielded building space) might also be obtained from MFTF or other salvage, as well as some components needed for intermediate experiments for additional verification of the concept (especially confinement scaling). The proposed ignition experiment would serve as proof-of-principle for the spheromak DT fusion reactor design published by Hagenson and Krakowski, with a nuclear island cost about ten times less than a tokamak of comparable power. Designs at even higher power density and lower cost might be possible using Christofilos` concept of a liquid lithium blanket. Since all structures would be protected from neutrons by the lithium blanket and the tritium inventory can be reduced by continuous removal from the liquid blanket, environmental and safety characteristics appear to be favorable.

Fowler, T.K.

1993-09-28T23:59:59.000Z

237

Modelling of a diode laser with a resonant grating of quantum wells and an external mirror  

SciTech Connect

A three-dimensional numerical model of a diode laser with a resonant grating of quantum wells (QWs) and an external mirror is developed and used to calculate diode laser pulses that are long compared to the time of reaching a stationary regime and are short enough to neglect heating of the medium. The consistent solutions of the Helmholtz field equation and the system of diffusion equations for inversion in each QW are found. A source of charge carriers can be both an electron beam and a pump laser beam. The calculations yielded the longitudinal and radial profiles of the generated field, as well as its wavelength and power. The effective threshold pump current is determined. In the created iteration algorithm, the calculation time linearly increases with the number of QWs, which allows one to find the characteristics of lasers with a large number of QWs. The output powers and beam divergence angles of a cylindrical laser are calculated for different cavity lengths and pump spot radii. After calculating the fundamental mode characteristics, high-order modes were additionally calculated on the background of the frozen carrier distributions in the QW grating. It is shown that all the competing modes remain below the excitation threshold for the pump powers used in the experiment. The calculated and experimental data for the case of pumping by a nanosecond electron beam are qualitatively compared.

Vysotskii, D V; Elkin, N N; Napartovich, A P; Kozlovskii, Vladimir I; Lavrushin, B M

2011-09-30T23:59:59.000Z

238

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

Science Conference Proceedings (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

239

Some implications for mirror research of the coupling between fusion economics and fusion physics  

SciTech Connect

The thesis is made that physics understanding and innovation represent two of the most important ingredients of any program to develop fusion power. In this context the coupling between these and the econmics of yet-to-be realized fusion power plants is explored. The coupling is two-way: realistic evaluations of the economic (and environmental) requirements for fusion power systems can influence the physics objectives of present-day fusion research programs; physics understanding and innovative ideas can favorably impact the future economics of fusion power systems. Of equal importance is the role that physics/innovation can have on the time scale for the first practical demonstration of fusion power. Given the growing worldwide need for long-term solutions to the problem of energy it is claimed to be crucial that fusion research be carried out on a broad base and in a spirit that both facilitates the growth of physics understanding and fosters innovation. Developing this theme, some examples of mirror-based fusion system concepts are given that illustrate the coupling here described.

Post, R.F.

1980-01-01T23:59:59.000Z

240

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

DOE Green Energy (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

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

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

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

242

Cloning of arbitrary mirror-symmetric distributions on Bloch sphere: Optimality proof and proposal for practical photonic realization  

E-Print Network (OSTI)

We study state-dependent quantum cloning which can outperform universal cloning. This is possible by using some a priori information on a given quantum state to be cloned. Specifically, we propose a generalization and optical implementation of quantum optimal mirror phase-covariant cloning, which refers to optimal cloning of sets of qubits of known modulus of expectation value of Pauli's Z operator. Our results can be applied for cloning of an arbitrary mirror-symmetric distribution of qubits on Bloch sphere including in special cases the universal cloning and phase-covariant cloning. We show that the cloning is optimal by adapting our former optimality proof for axisymmetric cloning [Phys. Rev. 82, 042330 (2010)]. Moreover, we propose an optical realization of the optimal mirror phase-covariant 1 to 2 cloning of a qubit, for which the mean probability of successful cloning varies from 1/6 to 1/3 depending on prior information on the set of qubits to be cloned. The qubits are represented by polarization states of photons generated by the type-I spontaneous parametric down-conversion. The scheme is based on the interference of two photons on an unbalanced polarization-dependent beam splitter with different splitting ratios for vertical and horizontal polarization components and the additional application of feedforward by means of Pockels cells. The experimental feasibility of the proposed setup is carefully studied including various kinds of imperfections and losses including: (i) finite efficiency of generating a pair of entangled photons in the type-I spontaneous parametric down conversion, (ii) the influence of choosing various splitting ratios of the unbalanced beam splitter, (iii) the application of conventional and single-photon discriminating detectors, (iv) dark counts and finite efficiency of the detectors.

Karol Bartkiewicz; Adam Miranowicz

2011-03-28T23:59:59.000Z

243

Single-photon single-ion interaction in free space configuration in front of a parabolic mirror  

E-Print Network (OSTI)

The efficient interaction between single photons and single matter objects in free space is of key importance for quantum technologies. An experimental setup for testing this possibility involves single two-level ion trapped at the focus of a parabolic metallic mirror. We study the conditions for the setup, under which the assumption about the free-space mode structure of the radiation field in the vicinity of the atom is justified. In our analysis we apply vectorial properties of light by including polarization degree of freedom. We look for possible changes in the spontaneous emission rate of the atom resulting from the presence of the parabolic boundary conditions.

Magdalena Stobi?ska; Robert Alicki

2009-05-25T23:59:59.000Z

244

K:\\Web\\WebMirror2\\ospa\\policiesandprocedures\\Allowability of B I start up costs Policy-1-12.doc SPA Procedure for Allowable B&I Clinical Trial Start-Up Costs  

E-Print Network (OSTI)

K:\\Web\\WebMirror2\\ospa\\policiesandprocedures\\Allowability of B I start up costs Policy-1-12.doc SPA

Amin, S. Massoud

245

Isospin symmetry breaking at high spins in the mirror pair {sup 67}Se and {sup 67}As  

Science Conference Proceedings (OSTI)

Recent experimental data have revealed large mirror energy differences (MED) between high-spin states in the mirror nuclei {sup 67}Se and {sup 67}As, the heaviest pair where MED have been determined so far. The MED are generally attributed to the isospin symmetry breaking caused by the Coulomb force and by the isospin-nonconserving part of the nucleon-nucleon residual interaction. The different contributions of the various terms have been extensively studied in the fp shell. By employing large-scale shell-model calculations, we show that the inclusion of the g{sub 9/2} orbit causes interference between the electromagnetic spin-orbit and the Coulomb monopole radial terms at high spin. The large MED are attributed to the aligned proton pair excitations from the p{sub 3/2} and f{sub 5/2} orbits to the g{sub 9/2} orbit. The relation of the MED to deformation is discussed.

Kaneko, K. [Department of Physics, Kyushu Sangyo University, Fukuoka 813-8503 (Japan); Tazaki, S. [Department of Applied Physics, Fukuoka University, Fukuoka 814-0180 (Japan); Mizusaki, T. [Institute of Natural Sciences, Senshu University, Tokyo 101-8425 (Japan); Sun, Y.; Hasegawa, M. [Department of Physics, Shanghai Jiao Tong University, Shanghai 200240 (China); Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000 (China); De Angelis, G. [Laboratori Nazionali di Legnaro dell'INFN, Legnaro (Padova), I-35020 (Italy)

2010-12-15T23:59:59.000Z

246

Gamma bang time/reaction history diagnostics for the National Ignition Facility using 90 deg. off-axis parabolic mirrors  

Science Conference Proceedings (OSTI)

Gas Cherenkov detectors (GCDs) have been used to convert fusion gamma into photons to achieve gamma bang time and reaction history measurements. The GCDs designed for OMEGA used Cassegrain reflector optics in order to fit inside a 10 in. manipulator. A novel design for the National Ignition Facility using 90 deg. off-axis parabolic 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 CO{sub 2} gas volume, the detector is positioned at the stop position rather than at 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 CO{sub 2} gas volume. A cluster of four channels will allow for increased dynamic range as well as for different gamma energy threshold sensitivities.

Malone, R. M. [National Security Technologies, P.O. Box 809, Los Alamos, New Mexico 87544 (United States); Herrmann, H. W.; Mack, J. M.; Young, C. S. [Los Alamos National Laboratory, P.O. Box 1663, Los Alamos, New Mexico 87545 (United States); Stoeffl, W. [Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, California 94551 (United States)

2008-10-15T23:59:59.000Z

247

"Magic mirror on the wall, who's the fastest Database of them all?" A Survey of Database Benchmarks  

E-Print Network (OSTI)

Benchmarks are important tools for measuring the performance of database management systems (DBMS) and for understanding vendor claims of performance. This paper defines DBMS benchmarks, explores the role of the Transaction Processing Performance Council as the only benchmark standards organization, and surveys eight existing DBMS benchmarks for on-line transaction processing, relational, and object-oriented databases. 1 Introduction When examining the performance of a commercial database management system (DBMS),one is bombarded with vendor performance claims. Each vendor will shower you with claims of "tpsA-Local" ratings, or top performance on the "TPC-C" benchmark. If you are looking at a commercial object-oriented DBMS, vendors will tell you they have the best performance on the "Cattell" (or OO1 or "Sun") benchmark. The use of benchmark performance measurements by commercial DBMS vendors seems a bit like the Queen in Snow White asking the magic mirror who is the fairest. If the ...

Usaf Maj; Timothy J. Halloran; Timothy J. Halloran; Mark A. Roth; Mark A. Roth

1993-01-01T23:59:59.000Z

248

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

Science Conference Proceedings (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

249

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's wave scattering theory to evaluate degradation of the beam performance. For a damaged surface

Tillack, Mark

250

Performance of the Meteolabor “Snow White” Chilled-Mirror Hygrometer in the Tropical Troposphere: Comparisons with the Vaisala RS80 A/H-Humicap Sensors  

Science Conference Proceedings (OSTI)

The “Snow White” hygrometer is a low-cost, chilled-mirror hygrometer for radiosonde applications provided by a Swiss company, Meteolabor AG. A total of 54 Snow White soundings were conducted at five tropical stations in different seasons in 2000–...

Masatomo Fujiwara; Masato Shiotani; Fumio Hasebe; Holger Vömel; Samuel J. Oltmans; Paul W. Ruppert; Takeshi Horinouchi; Toshitaka Tsuda

2003-11-01T23:59:59.000Z

251

X-ray detection system development for tandem mirror experiment upgrade (TMX-U): hardware and software  

SciTech Connect

This x-ray detection system measures the electron Bremsstrahlung spectrum from the Tandem Mirror Experiment-Upgrade (TMX-U). From this spectrum, we can calculate the electron temperature. The low energy portion of the spectrum (0.5 to 40 keV) is measured by a liquid-nitrogen-cooled, lithium-drifted silicon detector. The higher energy spectrometer uses an intrinsic germanium detector to accommodate the 100 to 200 keV spectra. The system proceeds as follows. The preamplified detector signals are digitized by a high-speed A-to-D converter located in a Computer Automated Measurement and Control (CAMAC) crate. The data is then stored in a histogramming memory via a data router. The CAMAC crate interfaces with a local desktop computer or the main data acquisition computer that stores the data. The software sets up the modules, acquires the energy spectra (with sample times as short as 2 ms) and plots it. Up to 40 time-resolved spectra are available during one plasma cycle. The actual module configuration, CAMAC interfacing and software that runs the system are the subjects of this paper.

Jones, R.M.; Failor, B.H.; Coutts, G.W.

1984-12-01T23:59:59.000Z

252

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

Science Conference Proceedings (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

253

The symmetry, inferable from Bogoliubov transformation, between the processes induced by the mirror in two-dimentional and the charge in four-dimentional space-time  

E-Print Network (OSTI)

The symmetry between the creation of pairs of massless bosons or fermions by accelerated mirror in 1+1 space and the emission of single photons or scalar quanta by electric or scalar charge in 3+1 space is deepened in this paper. The relation of Bogoliubov coefficients with Fourier's components of current or charge density leads to the coicidence of the spin of any disturbances bilinear in scalar or spinor field with the spin of quanta emitted by the electric or scalar charge. The mass and invariant momentum transfer of these disturbances are essential for the relation of Bogoliubov coefficients with Green's functions of wave equations both for 1+1 and 3+1 spaces. Namely the relation (20) leads to the coincidence of the self-action changes and vacuum-vacuum amplitudes for the accelerated mirror in 1+1 space and charge in 3+1 space. Thus, both invariants of the Lorentz group, spin and mass, perform intrinsic role in established symmetry. The symmetry embraces not only the processes of real quanta radiation. It extends also to the processes of the mirror and the charge interactions with the fields carring spacelike momenta. These fields accompany their sources and define the Bogoliubov matrix coefficients \\alpha^{B,F}. It is shown that the traces of \\alpha^{B,F} describe the vector and scalar interactions of accelerated mirror with uniformly moving detector. This interpretation rests essentially on the relation (100) between the propagators of the waves with spacelike momenta in 2- and 4-dimentional spaces. The traces of \\alpha^{B,F} coincide actually with the products of the mass shift \\Delta m_{1,0} of accelerated electric or scalar charge and the proper time of the shift formation. The symmetry fixes the value of the bare fine structure constant \\alpha_0=1/4\\pi.

V. I. Ritus

2003-09-18T23:59:59.000Z

254

2-D Heat Load Distribution on the TFTR Bumper Limiter During High-Power Neutral Beam Injection  

Science Conference Proceedings (OSTI)

Impurity Control and Plasma-Facing Component / Proceedings of the Ninth Topical Meeting on the Technology of Fusion Energy (Oak Brook, Illinois, October 7-11, 1990)

A. C. Janos; M. Corneliussen. D. K. Owens; M. Ulrickson

255

Tandem mirror theory workshop  

SciTech Connect

The workshop was divided into three sections which were constituted according to subject matter: RF Heating, MHD Equilibrium and Stability, and Transport and Microstability. An overview from Livermore's point of view was given at the beginning of each session. Each session was assigned a secretary to take notes. These notes have been used in preparing this report on the workshop. The report includes the activities, conclusions, and recommendations of the workshop.

1981-05-01T23:59:59.000Z

256

Mirror hybrid reactors  

SciTech Connect

The fusion-fission hybrid is a combination of the fusion and fission processes, having features which are complementary. Fission energy is running out of readily available fuel, and fusion has extra neutrons which can be used to breed that fission fuel. Fusion would have to take on an extra burden of radioactivity, but this early application would give fusion, which does not work well enough now to make power, practical experience which may accelerate development of pure fusion.

Moir, R.W.

1978-09-11T23:59:59.000Z

257

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

SciTech Connect

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 10-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.

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

2008-10-01T23:59:59.000Z

258

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

SciTech Connect

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

259

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

SciTech Connect

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

260

Non-destructive observation of in-grown stacking faults in 4H-SiC epitaxial layer using mirror electron microscope  

SciTech Connect

Mirror electron microscope (MEM) observation has been conducted for a 4-{mu}m-thick n-doped 4H-SiC epitaxial layer. If the sample is simultaneously illuminated with ultraviolet (UV) light of a slightly greater energy than the bandgap energy of 4H-SiC, in-grown stacking faults (IGSFs) can be clearly observed in MEM images. These observations were performed non-destructively, as almost all irradiated electrons returned without impinging the sample surface due to the negative voltage applied to the sample. High spatial resolution observation via MEM showed that multiple IGSFs were stacked up. The phenomenon in which the contrast of the IGSFs vanished in the absence of UV illumination and under UV illumination with a lower energy than the bandgap energy revealed that the origin of the contrast was the negative charging of IGSFs trapping electrons excited by UV light.

Hasegawa, Masaki; Ohno, Toshiyuki [Central Research Laboratory, Hitachi Ltd., 1-280, Higashi-koigakubo, Kokubunji, Tokyo 185-8601 (Japan)

2011-10-01T23:59:59.000Z

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.


261

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

SciTech Connect

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

262

Control of phase locking in a set of lasers with self-pumped phase-conjugate gain-grating mirrors using a passive Q-switch  

SciTech Connect

We studied the possibility of controlling phase-locked lasing of a set of lasers with self-pumped phase-conjugate gain-grating mirrors by using a passive Q-switch and selecting the gain of one of the lasers. The ranges of stable operation are calculated by mathematical simulation and well agree with the experimental results. Single-mode radiation in the form of trains of phase-locked laser pulses are experimentally obtained for the first time in a three-channel diffraction-coupled gain-grating Nd : YAG laser system with a LiF :F {sup -}{sub 2} passive Q-switch. The space-time pattern of the trains of 1.064-{mu}m nanosecond pulses is the same in the channels with and without Q-switch and their interference pattern contrast reaches 0.81. (control of laser radiation parameters)

Basiev, Tasoltan T; Gavrilov, A V; Smetanin, Sergei N; Fedin, Aleksandr V

2011-03-31T23:59:59.000Z

263

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  

DOE Green Energy (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

264

Complete genome sequence of the facultatively anaerobic, appendaged bacterium Muricauda ruestringensis type strain (B1T)  

SciTech Connect

Muricauda ruestringensis Bruns et al. 2001 is the type species of the genus Muricauda, which belongs to the family Flavobacteriaceae in the phylum Bacteroidetes. The species is of interest because of its isolated position in the genomically unexplored genus Muricauda, which is located in a part of the tree of life containing not many organisms with sequenced genomes. The genome, which consists of a circular chromosome of 3,842,422 bp length with a total of 3,478 protein-coding and 47 RNA genes, is a part of the Genomic Encyclopedia of Bacteria and Archaea project.

Huntemann, Marcel [U.S. Department of Energy, Joint Genome Institute; Teshima, Hazuki [Los Alamos National Laboratory (LANL); Lapidus, Alla L. [U.S. Department of Energy, Joint Genome Institute; Nolan, Matt [U.S. Department of Energy, Joint Genome Institute; Lucas, Susan [U.S. Department of Energy, Joint Genome Institute; Hammon, Nancy [U.S. Department of Energy, Joint Genome Institute; Deshpande, Shweta [U.S. Department of Energy, Joint Genome Institute; Cheng, Jan-Fang [U.S. Department of Energy, Joint Genome Institute; Tapia, Roxanne [Los Alamos National Laboratory (LANL); Goodwin, Lynne A. [Los Alamos National Laboratory (LANL); Pitluck, Sam [U.S. Department of Energy, Joint Genome Institute; Liolios, Konstantinos [U.S. Department of Energy, Joint Genome Institute; Pagani, Ioanna [U.S. Department of Energy, Joint Genome Institute; Ivanova, N [U.S. Department of Energy, Joint Genome Institute; Mavromatis, K [U.S. Department of Energy, Joint Genome Institute; Mikhailova, Natalia [U.S. Department of Energy, Joint Genome Institute; Pati, Amrita [U.S. Department of Energy, Joint Genome Institute; Chen, Amy [U.S. Department of Energy, Joint Genome Institute; Palaniappan, Krishna [U.S. Department of Energy, Joint Genome Institute; Land, Miriam L [ORNL; Hauser, Loren John [ORNL; Pan, Chongle [ORNL; Brambilla, Evelyne-Marie [DSMZ - German Collection of Microorganisms and Cell Cultures GmbH, Braunschweig, Germany; Rohde, Manfred [HZI - Helmholtz Centre for Infection Research, Braunschweig, Germany; Spring, Stefan [DSMZ - German Collection of Microorganisms and Cell Cultures GmbH, Braunschweig, Germany; Goker, Markus [DSMZ - German Collection of Microorganisms and Cell Cultures GmbH, Braunschweig, Germany; Detter, J. Chris [U.S. Department of Energy, Joint Genome Institute; Bristow, James [U.S. Department of Energy, Joint Genome Institute; Eisen, Jonathan [U.S. Department of Energy, Joint Genome Institute; Markowitz, Victor [U.S. Department of Energy, Joint Genome Institute; Hugenholtz, Philip [U.S. Department of Energy, Joint Genome Institute; Kyrpides, Nikos C [U.S. Department of Energy, Joint Genome Institute; Klenk, Hans-Peter [DSMZ - German Collection of Microorganisms and Cell Cultures GmbH, Braunschweig, Germany; Woyke, Tanja [U.S. Department of Energy, Joint Genome Institute

2012-01-01T23:59:59.000Z

265

Modeling and optimization of operating parameters for a test-cell option of the Fusion Power Demonstration-II tandem mirror design  

SciTech Connect

Models of tandem mirror devices operated with a test-cell insert have been used to calculate operating parameters for FPD-II+T, an upgrade of the Fusion Power Demonstration-II device. Two test-cell configurations were considered, one accommodating two 1.5 m blanket test modules and the other having four. To minimize the cost of the upgrade, FPD-II+T utilizes the same coil arrangement and machine dimensions outside of the test cell as FPD-II, and the requirements on the end cell systems have been held near or below those for FPD-II. The maximum achievable test cell wall loading found for the short test-cell was 3.5 MW/m/sup 2/ while 6.0 MW/m/sup 2/ was obtainable in the long test-cell configuration. The most severe limitation on the achievable wall loading is the upper limit on test-cell beta set by MHD stability calculations. Modification of the shape of the magnetic field in the test-cell by improving the magnet design could raise this beta limit and lead to improved test-cell performance.

Haney, S.W.; Fenstermacher, M.E.

1985-04-03T23:59:59.000Z

266

Design scoping study of the 12T Yin-Yang magnet system for the Tandem Mirror Next Step (TMNS). Final report  

Science Conference Proceedings (OSTI)

The overall objective of this engineering study was to determine the feasibility of designing a Yin-Yang magnet capable of producing a peak field in the windings of 12T for the Tandem Mirror Next Step (TMNS) program. As part of this technical study, a rough order of magnitude (ROM) cost estimate of the winding for this magnet was undertaken. The preferred approach to the winding design of the TMNS plug coil utilizes innovative design concepts to meet the structural, electrical and thermodynamic requirements of the magnet system. Structurally, the coil is radially partitioned into four sections, preventing the accumulation of the radial loads and reacting them into the structural case. To safely dissipate the 13.34 GJ of energy stored in each Yin-Yang magnet, the winding has been electrically subdivided into parallel or nested coils, each having its own power supply and protection circuitry. This arrangement effectively divides the total stored energy of the coils into manageable subsystems. The windings are cooled with superfluid helium II, operated at 1.8K and 1.2 atmospheres. The superior cooling capabilities of helium II have enabled the overall winding envelope to be minimized, providing a current density of 2367 A/CM/sup 2/, excluding substructure.

Not Available

1981-09-01T23:59:59.000Z

267

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

SciTech Connect

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

268

Low Cost, Stable Switchable Mirrors: Lithium Ion Mirrors ...  

These energy saving devices have advantages over traditional absorbing electrochromics for radiant energy control ... time * Low material and ...

269

Grid Data Mirroring Package (GDMP)  

Science Conference Proceedings (OSTI)

The GDMP client-server software system is a generic file replication tool that replicates files securely and efficiently from one site to another in a Data Grid environment using Globus Grid tools. In addition, it manages replica catalogue entries for ...

Heinz Stockinger; Asad Samar; Shahzad Muzaffar; Flavia Donno

2002-04-01T23:59:59.000Z

270

ECRH in tandem mirror machines  

Science Conference Proceedings (OSTI)

The thermal barrier concept and the use of ECRH to generate the several electron populations required to establish confinement are discussed. Important physics issues related to the microwave heating are discussed. Fokker-Planck calculations which model the heating processes are presented, followed by recent experimental data on hot electron heating.

Stallard, B.W.

1983-05-27T23:59:59.000Z

271

Micromechanical Mirror Performs Under Pressure  

Science Conference Proceedings (OSTI)

... than an order of magnitude less massive than conventional stack reflectors, has a mechanical quality factor (Q = 7.8 X 105) two orders of magnitude ...

2012-04-05T23:59:59.000Z

272

QED with a parabolic mirror  

E-Print Network (OSTI)

We investigate the quantum electrodynamics of a single two-level atom located at the focus of a parabolic cavity. We first work out the modifications of the spontaneous emission induced by the presence of this boundary in the optical regime, where the dipole and the rotating-wave approximations apply. Furthermore, the single-photon state that leaves the cavity asymptotically is determined. The corresponding time-reversed single-photon quantum state is capable of exciting the atom in this extreme multimode scenario with near-unit probability. Using semiclassical methods, we derive a photon-path representation for the relevant transition amplitudes and show that it constitutes a satisfactory approximation for a wide range of wavelengths.

G. Alber; J. Z. Bernád; M. Stobi?ska; L. L. Sánchez-Soto; G. Leuchs

2013-05-11T23:59:59.000Z

273

Ironic Mirroring: Sufis, Hijras, Artists  

E-Print Network (OSTI)

Bilchik, Nadia. "Pakistan's Dual Gender Tax Collectors."Sufi Shrine in Central Pakistan. ” The Long War Journal. 3of South Asia (India, Pakistan, Bangladesh). The term hijra

Hussaini, Sara Haq

2012-01-01T23:59:59.000Z

274

Appendage development and early Distal-less regulation in arthropods: A study of the chelicerate Tetranychus urticae (Acarida)  

E-Print Network (OSTI)

complex Hox proteins Ubx + AbdA (+ co-factors). i) Antero-posterior segmental co-ordinates In the cellularising Drosophila embryo, the segment polarity gene engrailed is activated in 14 single-cell wide transverse stripes (in subtle A-P and D... that confer a sharp anterior limit to engrailed stripes (see Figure 1.2.1b,i)(Gilbert 2000). Negative feedback control of wg also occurs, dependent on inducible inhibitors (e.g. naked cuticle, nkd) and cross-pathway antagonism (e.g. Hh-Zw3-GSK3 interaction...

Cyrus-Kent, Chloë

2007-12-08T23:59:59.000Z

275

Axisymmetric Magnetic Mirror Fusion-Fission Hybrid  

Science Conference Proceedings (OSTI)

Fusion-Fission Hybrids and Transmutation / Proceedings of the Fifteenth International Conference on Emerging Nuclear Energy Systems

R. W. Moir; N. N. Martovetsky; A. W. Molvik; D. D. Ryutov; T. C. Simonen

276

Information Technology Solutions Automated Solar Field Mirror ...  

accuracy of CSP systems Standardizes measurements which may be prone to human variability Significantly improved performance Reduced cost ...

277

STOCHASTIC BLOCK MIRROR DESCENT METHODS FOR ...  

E-Print Network (OSTI)

difficulty to apply the approach to the on-line setting where one needs to update the ..... ?k and B are sparse (i.e., the vector ?k and each row vector of B contain just a few nonzeros). ...... Problems of Information Transmission, 41:n.4, 2005. 25  ...

278

Rapid Solar Mirror Characterization with Fringe Reflection ...  

Energy Analysis Rapid ... Technology Marketing Summary This technology is an automated system in which the ... Solar Energy; More Information Patent ...

279

Transition Metal Switchable Mirrors - Energy Innovation Portal  

A window using this technology can be programmed to respond to local sunlight and weather conditions, ... Solar Energy Materials & Solar Cells, 86 ...

280

Passive damping of a LIGO mirror  

E-Print Network (OSTI)

There may be largely untapped source of information about our cosmic surroundings in the form of gravitational radiation, predicted by Einstein's theory of General Relativity. If detected, gravitational waves (GWs) could ...

Antler, Natania

2009-01-01T23:59:59.000Z

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.


281

The Mirror DBMS at TREC-8  

Science Conference Proceedings (OSTI)

... For example, on topic 311 (which is about industrial espionage), it finds terms like 'spy', 'intelligence', and 'counterintelligence', and from the ...

2000-02-04T23:59:59.000Z

282

Semantic Representation in the Mirror Neuron System  

E-Print Network (OSTI)

participants to press the ‘green button’ if they thought theeach were the green and red buttons half of the time.

Leong, Josiah; Ivry, Richard

2011-01-01T23:59:59.000Z

283

Validation Analysis of Mirror Descent Stochastic Approximation ...  

E-Print Network (OSTI)

utility and conditional value at risk approaches for the asset allocation problem. A discussion ..... zero, with increase of the sample size N, at a rate of O(N. ?1/2. ).

284

Figure and finish of grazing incidence mirrors  

SciTech Connect

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

285

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

286

New Electrochromic Mirrors - Lawrence Berkeley National ...  

yellow semiconducting phases Li3Sb and Li3Bi are about 3.1 and 3.5 eV, ... Alternatively, new systems with smaller volume changes may become ...

287

Concentrating Solar Power: Energy from Mirrors  

DOE Green Energy (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

288

Thermovoltaic 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 a heavily doped silicon or a metal.

Campbell, B.C.

1995-12-31T23:59:59.000Z

289

Optical durability testing of candidate solar mirrors  

DOE Green Energy (OSTI)

Durability testing of a variety of candidate solar reflector materials at outdoor test sites and in laboratory accelerated weathering chambers is the main activity within the Advanced Materials task of the Concentrated Solar Power (CSP) Program. Outdoor exposure testing (OET) at up to eight outdoor, worldwide exposure sites has been underway for several years. This includes collaboration under the auspices of the International Energy Agency (IEA) Solar Power and Chemical Energy Systems (SolarPACES) agreement. Outdoor sites are fully instrumented in terms of monitoring meteorological conditions and solar irradiance. Candidate materials are optically characterized prior to being subjected to exposure in real and simulated weathering environments. Optical durability is quantified by periodically re-measuring hemispherical and specular reflectance as a function of exposure time. By closely monitoring the site- and time-dependent environmental stress conditions experienced by the material samples, site-dependent loss of performance may be quantified. In addition, accelerated exposure testing (AET) of these materials in parallel under laboratory-controlled conditions may permit correlating the outdoor results with AET, and subsequently predicting service lifetimes. Test results to date for a large number of candidate solar reflector materials are presented in this report. Acronyms are defined. Based upon OET and AET results to date, conclusions can be drawn about the optical durability of the candidate reflector materials. The optical durability of thin glass, thick glass, and two metallized polymers can be characterized as excellent. The all-polymeric construction, several of the aluminized reflectors, and a metallized polymer can be characterized as having intermediate durability and require further improvement, testing and evaluation, or both.

Jorgensen, G.; Kennedy, C.; King, D.; Terwilliger, K.

2000-03-24T23:59:59.000Z

290

Chilled Mirror Dew Point Hygrometer (CM) Handbook  

SciTech Connect

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

291

Expression of the Lhx genes apterous and lim1 in an errant polychaete: implications for bilaterian appendage evolution, neural development, and muscle diversification  

E-Print Network (OSTI)

targeting of axonal projections in ancestral bilaterians [orientation of axonal projections of particular spinal cordthe dendritic growth of projection neurons to antennal lobe

Winchell, Christopher J; Jacobs, David K

2013-01-01T23:59:59.000Z

292

Expression of Distal-less, dachshund, and optomotor blind in Neanthes arenaceodentata (Annelida, Nereididae) does not support homology of appendage-forming mechanisms across the Bilateria  

E-Print Network (OSTI)

Dev 99:173–176 Carroll SB, Grenier JK, Weatherbee SD (2005)H, Corley LS, Sherbon B, Grenier JK, Fallon JF, Kimble J,

Winchell, Christopher J.; Valencia, Jonathan E.; Jacobs, David K.

2010-01-01T23:59:59.000Z

293

Mirror mirror on the ceiling: flexible wireless links for data centers  

Science Conference Proceedings (OSTI)

Modern data centers are massive, and support a range of distributed applications across potentially hundreds of server racks. As their utilization and bandwidth needs continue to grow, traditional methods of augmenting bandwidth have proven complex and ... Keywords: 60 ghz wireless, data centers, wireless beamforming

Xia Zhou; Zengbin Zhang; Yibo Zhu; Yubo Li; Saipriya Kumar; Amin Vahdat; Ben Y. Zhao; Haitao Zheng

2012-08-01T23:59:59.000Z

294

LBNL/ IH Division Parameters on Respirator Protection  

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

LBNL Truck Pilot Escort Service 2010 LBNL Truck Pilot Escort Service http:www.lbl.govWorkplacesiteconstructionfilespilot.html Trucks 40 feet and over in length (bumper to...

295

Mg-Transition Metal Mirrors - Lawrence Berkeley National Laboratory  

mixed metal thin films containing magnesium and first -row transition ... The dotted line indicates ... Mg K -edge EXAFS transmission spectra of ...

296

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

297

A two axis mirror positioning system with quadrature encoder output  

E-Print Network (OSTI)

This project was conducted in support of a solar concentrating technology that required the design and construction of a low cost, two axis rotational drive system with a resolution of one degree or better. The scope of ...

Woodruff, Rick Bryan

2007-01-01T23:59:59.000Z

298

The clearest mirror : the science of laughing and crying  

E-Print Network (OSTI)

There are few things as familiar to us as the experience of laughing and crying. Studying the two emotional expressions side to side is a way to see our species anew. A way of linking what we share with other mammals to ...

Wanucha, Genevieve M. (Genevieve Marie)

2009-01-01T23:59:59.000Z

299

Language Embedding by Dual Compilation and State Mirroring  

E-Print Network (OSTI)

experience with the BinPro­ log Tcl/Tk interface. Compilation by each side, that targets the other's syntax programming environment to Prolog systems. The popular Tcl/Tk visual language by John Ousterhout [2­processor interaction model we will re­ port how it has been applied to an interface between BinProlog [3], and Tcl/Tk

Tarau, Paul

300

Improved tunnel resistance of silvered-polymer mirrors  

DOE Green Energy (OSTI)

This report documents the research performed at the Solar Energy Research Institute during fiscal year (FY) 1991 to develop ways to prevent delamination failure (known as tunneling) of silvered-polymer reflector materials. Several promising approaches have been identified and demonstrated that substantially reduce such failures. These approaches include (1) use of Tedlar edge tape rather than the manufacturer-recommended ECP-244 tape, (2) thermal treatment of laminated reflector/substrate constructions, and (3) application of silver to the polymer film through an alternative deposition process. Approaches 1 and 2 offer readily available engineering solutions to the delamination problem. Approaches 2 and 3 provide tunnel resistance over the entire surface of the reflector material, including the edges. Tedlar (a polyvinyl fluoride from DuPont) tape is an opaque white tape available in different widths from 3M Company. The base material has demonstrated outstanding outdoor durability. Thermal treatment of ECP-305 laminated to substrate materials has demonstrated outstanding resistance to tunneling. Alternative silver deposition techniques such as sputtering (rather than thermal evaporation) offer increased resistance to tunneling. 15 refs., 10 figs.

Jorgensen, G.; Schissel, P.; Kennedy, C.; Shinton, Y.; Powell, D.; Siebarth, J.

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.


301

Metal hydride switchable mirrors: Factors in?uencing dynamic ...  

2 was introduced are designated by vertical lines with long dashes, air ... actual limits of switching. The maximum transmission achieved was slightly

302

Switchable mirrors based on nickel–magnesium ?lms  

line electrolyte ~5–8 M KOH, Pt counter electrode, HgO/Hg reference!, with in situ measurement of optical transmission spectra or photopic transmittance.

303

Bakken formation oil and gas drilling activity mirrors development ...  

U.S. Energy Information Administration (EIA)

Petroleum & Other Liquids. Crude oil, gasoline, heating oil, diesel, propane, and other liquids including biofuels and natural gas liquids. Natural Gas

304

Modulating the Neutron Flux from a Mirror Neutron Source  

Science Conference Proceedings (OSTI)

A 14-MeV neutron source based on a Gas-Dynamic Trap will provide a high flux of 14 MeV neutrons for fusion materials and sub-component testing. In addition to its main goal, the source has potential applications in condensed matter physics and biophysics. In this report, the author considers adding one more capability to the GDT-based neutron source, the modulation of the neutron flux with a desired frequency. The modulation may be an enabling tool for the assessment of the role of non-steady-state effects in fusion devices as well as for high-precision, low-signal basic science experiments favoring the use of the synchronous detection technique. A conclusion is drawn that modulation frequency of up to 1 kHz and modulation amplitude of a few percent is achievable. Limitations on the amplitude of modulations at higher frequencies are discussed.

Ryutov, D D

2011-09-01T23:59:59.000Z

305

Amazing Mirrors and Superlative Supercomputers | U.S. DOE Office...  

Office of Science (SC) Website

for Teachers and Scientists Small Business Innovation Research and Small Business Technology Transfer Project Assessment Laboratories Ames Laboratory Argonne National...

306

TOPHAT™ for the Alignment & Focus of Heliostat Mirror Facets ...  

By utilizing a camera/target fixture placed in front of the heliostat TOPHAT aligns and focuses the ... Biomass and Biofuels; Building Energy Efficiency; Electricity ...

307

An Inherently Safe Tandem Mirror Fusion Blanket Concept  

Science Conference Proceedings (OSTI)

Blanket Design and Evaluation / Proceedings of the Seveth Topical Meeting on the Technology of Fusion Energy (Reno, Nevada, June 15–19, 1986)

J.K. Garner; C.F. Carson; J.D. Gordon; R.H. Whitley

308

TRANSPARENT HEAT MIRRORS FOR PASSIVE SOLAR HEATING APPLICATIONS  

E-Print Network (OSTI)

to the incident solar spectrum but must also have a highH I I \\j 6000 0 K solar spectrum I ! >.o .AA l--- visible

Selkowitz, S.

2011-01-01T23:59:59.000Z

309

Space charge effect and mirror charge effect in photoemission spectroscopy  

E-Print Network (OSTI)

is a third-generation synchrotron source which generatesthird-generation synchrotron light source. This value istypical third-generation synchrotron light source, which is

2004-01-01T23:59:59.000Z

310

Lasers without Mirrors, Designed by Supercomputer - NERSC SCience...  

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

it takes a big machine to understand the tiniest details. That's the case with free electron lasers (FELs). The powerful X-rays they generate can probe matter directly at...

311

Kinetic ballooning-interchange modes in tandem mirrors  

SciTech Connect

A hybrid fluid-gyrokinetic derivation of the kinetic modifications to the ballooning-interchange eigenmode equation is presented which removes the large and small wave frequency restrictions of Tang and Catto. The derivation employs a long-thin ordering and an eikonal ansatz, but otherwise allows arbitrary asymmetry, beta, pressure anisotropy, and unperturbed parallel and perpendicular electrostatic field.

Lee, X.S.; Catto, P.J.

1981-11-01T23:59:59.000Z

312

A Fusion Hybrid Reactor Based on the Gasdynamic Mirror (GDM)  

Science Conference Proceedings (OSTI)

Fusion-Fission Hybrids and Transmutation / Proceedings of the Fifteenth International Conference on Emerging Nuclear Energy Systems

Terry Kammash

313

Bakken formation oil and gas drilling activity mirrors development ...  

U.S. Energy Information Administration (EIA)

Tools; Glossary › All Reports ... weather; gasoline; capacity; exports; nuclear; forecast; View All Tags ...

314

Transition-Metal Switchable Mirrors : Future Technologies : From...  

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

Division with assistance from Jonathan Slack. This dynamic window technology consists of thin-film coatings on glass that can be converted from a transparent to a reflecting state...

315

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

E-Print Network (OSTI)

collection of essays by both scholars and creative artistscreative daughter in a stiflingly repressive environment? Alice Walker’s remarkable volume of essays,

Bergmann, Emilie L.; Herr, Richard

2007-01-01T23:59:59.000Z

316

The kinetic stabilizer: a route to simpler tandem mirror systems  

SciTech Connect

As we enter the new millennium there is a growing urgency to address the issue of finding long-range solutions to the world's energy needs. Fusion offers such a solution, provided economically viable means can be found to extract useful energy from fusion reactions. While the magnetic confinement approach to fusion has a long and productive history, to date the mainline approaches to magnetic confinement, namely closed systems such as the tokamak, appear to many as being too large and complex to be acceptable economically, despite the impressive progress that has made toward the achievement of fusion-relevant confinement parameters. Thus there is a growing feeling that it is imperative to search for new and simpler approaches to magnetic fusion, ones that might lead to smaller and more economically attractive fusion power plants.

Post, R F

2001-02-02T23:59:59.000Z

317

TRANSPARENT HEAT MIRRORS FOR PASSIVE SOLAR HEATING APPLICATIONS  

E-Print Network (OSTI)

LAWRENCE BERKELEY LABORATORY UNIVERSITY OF CALIFORNIABERKELEY, CALIFORNIA 94720March 1978 University of California/Berkeley Prepared for

Selkowitz, S.

2011-01-01T23:59:59.000Z

318

HEV Fleet Testing Maintenance Sheet  

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

U520038836 Advanced Vehicle Testing Activity Date Mileage Description Cost 8-Aug 11,142 Oil change 35.44 11-Oct 14,133 Rear Bumper damaged in collision (not included in...

319

Review of technical literature and trends related to automobile mass-reduction technology  

E-Print Network (OSTI)

Group and BMW Group: New Carbon Fiber Plant to be Built in11 lb, 0.5%), and carbon fiber (8 lb, 0.4%) features,panels, seat frames; carbon fiber bumper beams Novel chassis

Lutsey, Nicholas P.

2010-01-01T23:59:59.000Z

320

LMRP Containment Pic  

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

NOTE: Rotary Kelly Bushing (RKB) is 92' above mean sea level LMRP (closed) with slick joint across the annular 2 Bumper Subs (5' of stroke in each) 6-58" OD Drill Pipe Inside...

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

Foliage  

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

time in the past decade. Unless we have a long hot dry spell, we should have a bumper crop of wild blackberries, raspberries and strawberries. The tree leaves are exceptionally...

322

Performance of 3-Sun Mirror Modules on a Sun Tracking Carousel  

Science Conference Proceedings (OSTI)

Herein, we argue that solar PV can be economical for commercial customers in the sunny Pacific Southwestern US with buildings with flat roofs.

Fraas, Dr. Lewis [JX Crystals, Inc.; Avery, James E. [JX Crystals, Inc.; Minkin, Leonid M [ORNL; Maxey, L Curt [ORNL; Gehl, Anthony C [ORNL; Hurt, Rick A [ORNL; Boehm, Robert F [ORNL

2008-01-01T23:59:59.000Z

323

Characterization, performance and optimization of PVDF as a piezoelectric film for advanced space mirror concepts.  

Science Conference Proceedings (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

324

Recent experimental progress in the TMX-U thermal barrier tandem mirror experiment  

Science Conference Proceedings (OSTI)

Recent experiments on the TMX-U thermal barrier device at LLNL have achieved the end plugging of axial ion losses up to a central cell density of n/sub c/ = 2 x 10/sup 12/ cm. During these tests, the axial potential profile characteristic of a thermal barrier has been measured experimentally, indicating an ion-confining potential greater than 1.5 kV and a potential depression of 0.45 kV in the barrier region. The average beta of hot electrons in the thermal barrier has been increased to 15% and appears limited only by classical scattering and ECRH pulse duration. Furthermore, deuterium ions in the central cell have been heated with ICRF to an average energy of 1.5 keV, with a heating efficiency of 40%. During strong end plugging, the axial ion confinement time reached 50 to 100 ms while the nonambipolar radial ion confinement time was 5 to 15 ms - independent of end plugging. Radial ion confinement time exceeding 100 ms has been attained on shots without end plugging. Plates, floated electrically on the end walls, have increased the radial ion confinement time by a factor of 1.8. Further improvement in the central cell density during end plugging can be expected by increasing the ICRF, improving the central cell vacuum conditions and beam heating efficiency, and increasing the radial extent of the potential control plates on the end walls.

Turner, W.C.; Allen, S.L.; Casper, T.A.; Clauser, J.F.; Coensgen, F.H.; Correll, D.L.; Cummins, W.F.; Damm, C.C.; Foote, J.H.; Goodman, R.K.

1984-06-22T23:59:59.000Z

325

Cleanable and Hardcoat Coatings for Increased Durability of Silvered Polymeric Mirrors  

DOE Green Energy (OSTI)

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

326

Time resolved neutron spectrum measurements at the Mirror Fusion Test Facility  

SciTech Connect

An advanced neutron diagnostic system has been developed for spectrum measurements on MFTF. Its collimated field of view allows spatially resolved neutron spectrum measurements. The 10 Mhz pulse height analysis and particle identification capability allow spectrum measurements in intervals as short as 10 ms. These capabilities will be used for space and time resolved determinations of ion energy from measurements of neutron Doppler width.

Slaughter, D.

1985-10-01T23:59:59.000Z

327

Advances in Concentrating Solar Power Collectors: Mirrors and Solar Selective Coatings  

DOE Green Energy (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

328

Interfacing the tandem mirror reactor to the sulfur-iodine process for hydrogen production  

DOE Green Energy (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

329

Fusion component design for the moving-ring field-reversed mirror reactor  

DOE Green Energy (OSTI)

This partial report on the reactor design contains sections on the following: (1) burner section magnet system design, (2) plasma ring energy recovery, (3) vacuum system, (4) cryogenic system, (5) tritium flows and inventories, and (6) reactor design and layout. (MOW)

Carlson, G.A.

1981-01-28T23:59:59.000Z

330

Mirror Advanced Reactor Study (MARS). Final report. Volume 2. Commercial fusion synfuels plant  

DOE Green Energy (OSTI)

Volume 2 contains the following chapters: (1) synfuels; (2) physics base and parameters for TMR; (3) high-temperature two-temperature-zone blanket system for synfuel application; (4) thermochemical hydrogen processes; (5) interfacing the sulfur-iodine cycle; (6) interfacing the reactor with the thermochemical process; (7) tritium control in the blanket system; (8) the sulfur trioxide fluidized-bed composer; (9) preliminary cost estimates; and (10) fuels beyond hydrogen. (MOW)

Donohue, M.L.; Price, M.E. (eds.)

1984-07-01T23:59:59.000Z

331

Induced mirror symmetry breaking via template-controlled copolymerization: theoretical insights  

E-Print Network (OSTI)

A chemical equilibrium model of template-controlled copolymerization is presented for describing the outcome of the experimental induced desymmetrization scenarios recently proposed by Lahav and coworkers.

Blanco, Celia; 10.1039/C2CC18045F

2012-01-01T23:59:59.000Z

332

Euclid's Windows and our Mirrors Review of Euclid's Window by Leonard Mlodinow  

E-Print Network (OSTI)

for the cardboard figures that he paints. Disoriented by ideas and by individuals whose feelings and behavior the author about the material, I certainly found it an occasion to reflect on what I would have liked; particles and fields; Kaluza-Klein and the introduction of additional di- mensions; the function of "strings

333

Euclid's Windows and our Mirrors Review of Euclid's Window by Leonard Mlodinow  

E-Print Network (OSTI)

for the cardboard figures that he paints. Disoriented by ideas and by individuals whose feelings and behavior the author about the material, I certainly found it an occasion to reflect on what I would have liked of reconciling it with the differential geometry of relativity; particles #12; Review of Euclid's Windows 2

Langlands, Robert

334

TOPHAT™ FOR THE ALIGNMENT & FO US OF HELIOSTAT MIRROR FA ETS ...  

POTENTIAL APPLI ATIONS Energy Sustainability Solar Concentration Power Production Fuel & Chemical Production TE HNOLOGI AL ENEFITS

335

VR-mirror: a virtual reality system for mental practice in post-stroke rehabilitation  

Science Conference Proceedings (OSTI)

Developments in basic neurological research and techniques used to train professional athletes suggest that one way of facilitating this learning process of motor schemas is through the use of motor imagery, a training technique in which the procedure ...

Jose A. Lozano; Javier Montesa; Mari C. Juan; Mariano Alcañiz; Beatriz Rey; Jose Gil; Jose M. Martinez; Andrea Gaggioli; Francesca Morganti

2005-08-01T23:59:59.000Z

336

ANL/APS/TB-2 Use of a Mirror as the First Optical Component  

E-Print Network (OSTI)

~-------------------~ '.1,..---------------, e.z .--------------------, ". "J. J ttl fl " ," ,,, - ·. JL

Kemner, Ken

337

Impact of Thermo-Oxidative Wall Conditioning on the Performance of Diagnostic Mirrors for ITER  

Science Conference Proceedings (OSTI)

Diagnostics / Proceedings of the Fifteenth International Conference on Fusion Reactor Materials, Part A: Fusion Technology

A. Litnovsky; M. Matveeva; D. L. Rudakov; C. P. Chrobak; S. L. Allen; A. W. Leonard; P. L. Taylor; C. P. C. Wong; B. W. N. Fitzpatrick; J. W. Davis; A. A. Haasz; P. C. Stangeby; U. Breuer; V. Philipps; S. Möller

338

Smoke and Mirrors? Examining the Relationship Between Medical Cannabis Dispensaries and Crime  

E-Print Network (OSTI)

Interaction and Community Crime: Examining the Importance ofZuehlke. 1992. “Is Property Crime Caused by Drug Use or byPolicy and Property Crimes. ” Contemporary Economic Policy

Kintz, Matthew

2012-01-01T23:59:59.000Z

339

Smoke and Mirrors? Examining the Relationship Between Medical Cannabis Dispensaries and Crime  

E-Print Network (OSTI)

THE RELATIONSHIP BETWEEN MCDs AND CRIME R EFERENCES AmericanInteraction and Community Crime: Examining the Importance ofZuehlke. 1992. “Is Property Crime Caused by Drug Use or by

Kintz, Matthew W.

2012-01-01T23:59:59.000Z

340

Numerical Analysis for Controlling the Eigenmode Formation of Alfven Waves in the GAMMA 10 Tandem Mirror  

Science Conference Proceedings (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

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

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

E-Print Network (OSTI)

metallic indium to an indium oxide which is both transparentoxides of the indium and tin oxide types on polymeric films.

Levin, B. P.

2011-01-01T23:59:59.000Z

342

X-ray mirrors on flexible polymer substrates fabricated by atomic layer deposition  

E-Print Network (OSTI)

, WF6, and disilane, Si2H6. Silicon from Si2H6 serves as a sacrificial species on the surface to reduce

George, Steven M.

343

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

E-Print Network (OSTI)

the technological work done in a UFO by a voluptuous extra-of the video) with her UFO and processing its information inSong. ” As she does this, her UFO leaves the scene, and the

Alarcón-Jiménez, Ana-María

2009-01-01T23:59:59.000Z

344

Confinement by axisymmetric mirror configuration. Quarterly progress in STM program, July-September 1985  

DOE Green Energy (OSTI)

The hot ion plasma in STM was characterized along the following lines: (1) Sources of error in charge exchange measurements were identified and eliminated. (2) Systematic measurements of macroscopic parameters were made. (3) A trend toward saturation in B was identified. (4) Measurements of degradation in confinement of ICRF power were made. (5) Neutral hydrogen species ratios were measured. Instabilities in the rf heated plasma were observed by observing fluctuations in light emission, microwave transmission, Langmuir probe current, and probe floating potential. 16 figs. (WRF)

Not Available

1985-10-01T23:59:59.000Z

345

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

346

A Look In the Mirror: Attacks on Package Managers Author Names Removed for Anonymous Submission  

E-Print Network (OSTI)

for security. There is no protection of package metadata or the root metadata. Package Metadata An attacker can of the package in the package meta- data protects the package from tampering. Packages Resistance to metadata, the package metadata is protected from tam- pering. Packages The signature on the root metadata prevents

Hartman, John H.

347

Standing in the Mirror of World Capitalism: Economic Globalization, the Soviet Union, and the COMECON  

E-Print Network (OSTI)

Internacionales 69:45-56. Handbook of International Tradein Eastern Europe: A Handbook. London: Harvester Wheatsheaf.3.5% of total imports (Handbook of International Trade and

Grant-Friedman, Andrea

2004-01-01T23:59:59.000Z

348

Large aperture micro-focus KB mirrors for spectroscopy experiments at the Advanced Light Source  

E-Print Network (OSTI)

VLS Emission Spectrometer”, ALS Beamline Note, LSBL 622, 29the Long Trace Profiler,” ALS Beamline Note, LSBL 381, 26MES) beam-line 11.0.2 at the ALS illuminates electron and

2004-01-01T23:59:59.000Z

349

Mirror Advanced Reactor Study (MARS). Final report. Volume 1-B. Commercial fusion electric plant  

SciTech Connect

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

350

Mirror Advanced Reactor Study (MARS). Final report. Volume 1-A. Commercial fusion electric plant  

SciTech Connect

Volume 1-A contains the following chapters: (1) plasma engineering, (2) magnets, (3) ecr heating systems, (4) anchor ion-cyclotron resonance heating system, (5) sloshing ion neutral beam, (6) end cell structure, (7) end plasma technology, (8) fueling, (9) startup ion cyclotron resonant heating systems, and (10) end cell radiation analysis. (MOW)

Donohue, M.L.; Price, M.E. (eds.)

1984-07-01T23:59:59.000Z

351

The Implementation of a Super Mirror Polarizer at the SNS Fundamental Neutron Physics Beamline  

SciTech Connect

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

352

Elevation angle alignment of quasi optical receiver mirrors of collective Thomson scattering diagnostic by sawtooth measurements  

Science Conference Proceedings (OSTI)

Localized measurements of the fast ion velocity distribution function and the plasma composition measurements are of significant interest for the fusion community. Collective Thomson scattering (CTS) diagnostics allow such measurements with spatial and temporal resolution. Localized measurements require a good alignment of the optical path in the transmission line. Monitoring the alignment during the experiment greatly benefits the confidence in the CTS measurements. An in situ technique for the assessment of the elevation angle alignment of the receiver is developed. Using the CTS diagnostic on TEXTOR without a source of probing radiation in discharges with sawtooth oscillations, an elevation angle misalignment of 0.9 Degree-Sign was found with an accuracy of 0.25 Degree-Sign .

Moseev, D. [FOM DIFFER - Dutch Institute for Fundamental Energy Research, Association EURATOM-FOM, Nieuwegein (Netherlands); Max-Planck-Institut fuer Plasmaphysik, Euratom Association-IPP, 85748 Garching (Germany); Meo, F.; Korsholm, S. B.; Leipold, F.; Michelsen, P. K.; Nielsen, S. K.; Salewski, M.; Stejner, M. [Association EURATOM - DTU, Department of Physics, Technical University of Denmark, Riso Campus, 4000 Roskilde (Denmark); Bindslev, H. [Faculty of Science and Technology, Aarhus University, Ny Munkegade 120, DK-8000 Aarhus C (Denmark); Furtula, V. [Chalmers University of Technology, SE-412 96 Gothenburg (Sweden); Kantor, M. [FOM DIFFER - Dutch Institute for Fundamental Energy Research, Association EURATOM-FOM, Nieuwegein (Netherlands); FZ Juelich GmbH, EURATOM, Trilateral Euregio Cluster, D-52425 Juelich (Germany); Ioffe Institute, RAS, Saint Petersburg 194021 (Russian Federation)

2012-10-15T23:59:59.000Z

353

Detection, classification and localization of seabed objects with a virtual time reversal mirror  

E-Print Network (OSTI)

The work presented in this thesis addresses the problem of the detection, classification and localization of seabed objects in shallow water environments using a time reversal approach in a bistatic configuration. The ...

Dumortier, Alexis Jean Louis

2009-01-01T23:59:59.000Z

354

Optimizing the mirror (fusion--fission) hybrid reactor for plutonium production  

SciTech Connect

An analytic model of the fusion components is used to generate a consistent set of fusion parameters, and component costs as parameters are varied. A model of the blanket, based on neutronic and thermal hydraulics, is then used to analyze the trade-offs of energy production vs plutonium production dictated by blanket type and management. An economic discussion of fuel cost is also given. (MOW)

Lee, J.D.; Bender, D.J.; Moir, R.W.

1975-11-17T23:59:59.000Z

355

Tilting the mirror : packaging "Spanish" architecture in late nineteenth century California  

E-Print Network (OSTI)

In 1893 at Chicago's World Columbian Exposition, California devoted a great deal of resources to its promotion through a pavilion that spelled out a construct about California's "Spanish" past. This supposed history got ...

Díaz-Borioli, Leonardo, 1974-

2003-01-01T23:59:59.000Z

356

Development of a mirror-based endoscope for divertor spectroscopy on JET with the new ITER-like wall (invited)  

Science Conference Proceedings (OSTI)

A new endoscope with optimised divertor view has been developed in order to survey and monitor the emission of specific impurities such as tungsten and the remaining carbon as well as beryllium in the tungsten divertor of JET after the implementation of the ITER-like wall in 2011. The endoscope is a prototype for testing an ITER relevant design concept based on reflective optics only. It may be subject to high neutron fluxes as expected in ITER. The operating wavelength range, from 390 nm to 2500 nm, allows the measurements of the emission of all expected impurities (W I, Be II, C I, C II, C III) with high optical transmittance ({>=}30% in the designed wavelength range) as well as high spatial resolution that is {ITER relevant shutter system based on pneumatic techniques has been developed and integrated into the endoscope head. The endoscope is equipped with four digital CCD cameras, each combined with two filter wheels for narrow band interference and neutral density filters. Additionally, two protection cameras in the {lambda} > 0.95 {mu}m range have been integrated in the optical design for the real time wall protection during the plasma operation of JET.

Huber, A.; Brezinsek, S.; Mertens, Ph.; Schweer, B.; Sergienko, G.; Terra, A.; Clever, M.; Lambertz, H. T.; Samm, U. [Institute of Energy and Climate Research - Plasma Physics, Forschungszentrum Juelich, EURATOM Association, Trilateral Euregio Cluster, D-52425 Juelich (Germany); Arnoux, G.; Balshaw, N.; Edlingdon, T.; Farthing, J.; Matthews, G. F.; Riccardo, V.; Sanders, S.; Stamp, M.; Williams, J.; Zastrow, K. D. [Euratom/CCFE Fusion Association, Culham Science Centre, Abingdon, OX14 3DB (United Kingdom); Egner, S. [Kayser-Threde GmbH, D-81379 Munich (Germany); and others

2012-10-15T23:59:59.000Z

357

The reality of virtual limbs: does mirror technique for hand has functional consequences for the motor output?.  

E-Print Network (OSTI)

??Motor imagery was proven to excite the motor cortex as actual action execution. Therefore, motor imagery training was suggested as a method of facilitating the… (more)

Bienkiewicz, Marta

2008-01-01T23:59:59.000Z

358

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

359

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

360

Computer science education through a rearview mirror: Experiences with curriculum 68 at Virginia Polytechnic Institute and State University  

Science Conference Proceedings (OSTI)

The state of development of computer science, the views of the computer professionals regarding educational objectives, and the extent and types of post-school employment opportunities constitute the meta-environment for our educational efforts. In addition, ...

George W. Gorsline; Duff Green, III

1973-02-01T23:59:59.000Z

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

Effect of current density on thermodynamic properties of nanocrystalline palladium capped samarium hydride thin film switchable mirrors  

Science Conference Proceedings (OSTI)

A 55 nm samarium film capped with a 10 nm palladium overlayer switched from a metallic reflecting to a semiconducting, transparent in visible state during ex-situ hydrogen loading via electrochemical means in 1 M KOH electrolytic aqueous solution at ...

Pushpendra Kumar; L. K. Malhotra

2007-01-01T23:59:59.000Z

362

A Hot Plate Solar Cooker with Electricity Generation - Combining a Parabolic Trough Mirror with a Sidney Tube and Heat Pipe  

Science Conference Proceedings (OSTI)

Solar cookers supply clean and sustainable energy for cooking and so limit the use of wood or charcoal. A new type of solar cooker is developed with a hot plate. The hot plate offers comfortable access to the food under preparation. The hot plate opens ... Keywords: Sidney Tube, TEG, heat pipe, hot plate, solar cooker

A. D. J. Kaasjager; G. P. G. Moeys

2012-10-01T23:59:59.000Z

363

Back to Article page Steven Shapin  

E-Print Network (OSTI)

has a fishy tail'). At Harvard, the celebrations included `free drinks, science-themed rock bands magnets, mouse mats, scatter cushions and pet bowls; the `Darwin Loves You' bumper-stickers, the `Darwin Science and the Visual Arts (at the Fitzwilliam in Cambridge and the Yale Center for British Art), rightly

Shapin, Steven

364

MODEL STORAGE RING FOR 6 GEV OPERATION AS A SYNCHROTRON RADIATION...  

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

K1 KICK K2 KICK LL DRFT RFL INJECTION BUMPER LATTICE ELEMENTS: WIGINJSS:HP9121 ,700,1 JAR. 2.2 0.0 1 .2 0.0 0.0 0.0 0.0 0.0 0.0 Brho 20.01390 LEN,ANG 8,8' .500000 -17.039680...

365

The Waxwings  

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

from something not found in any other family of birds. Usually, on the tips of the inner wing feathers of both males and females, there are shiny red appendages like blobs of...

366

Comparative efficiencies of solar energy collectors Laboratoire de Technologie Optique  

E-Print Network (OSTI)

as a parabolic trough mirror), 2014 a fixed spherical mirror. We have taken into account atmospheric differential

Paris-Sud XI, Université de

367

Performance of the Vaisala RS80A/H and RS90 Humicap Sensors and the Meteolabor “Snow White” Chilled-Mirror Hygrometer in Paramaribo, Suriname  

Science Conference Proceedings (OSTI)

In climate research there is a strong need for accurate observations of water vapor in the upper atmosphere. Radiosoundings provide relative humidity profiles but the accuracy of many routine instruments is notoriously inadequate in the cold ...

Gé Verver; Masatomo Fujiwara; Pier Dolmans; Cor Becker; Paul Fortuin; Larry Miloshevich

2006-11-01T23:59:59.000Z

368

Intercomparison of Water Vapor Data Measured with Lidar during IHOP_2002. Part I: Airborne to Ground-Based Lidar Systems and Comparisons with Chilled-Mirror Hygrometer Radiosondes  

Science Conference Proceedings (OSTI)

The water vapor data measured with airborne and ground-based lidar systems during the International H2O Project (IHOP_2002), which took place in the Southern Great Plains during 13 May–25 June 2002 were investigated. So far, the data collected ...

Andreas Behrendt; Volker Wulfmeyer; Hans-Stefan Bauer; Thorsten Schaberl; Paolo Di Girolamo; Donato Summa; Christoph Kiemle; Gerhard Ehret; David N. Whiteman; Belay B. Demoz; Edward V. Browell; Syed Ismail; Richard Ferrare; Susan Kooi; Junhong Wang

2007-01-01T23:59:59.000Z

369

Microsoft Word - Defense Science Quarterly - 2july09 - FINAL.doc  

National Nuclear Security Administration (NNSA)

Summer 2009 Summer 2009 Defense Science Quarterly Inside This Issue 1 Message from the Director 2 Density Measurement Errors at DARHT - Quantifying a Decade of Progress 3 2nd Annual BoostFest 4 Nevada Test Site Awarded Prestigious Certificate of Accreditation for HEDP Calibration Labs 5 Update on the JASPER Program 6 Publication Highlights 7 Highlights from the Stewardship Science Graduate Fellowship Program 8 In Remembrance-Malcolm Nicol 8 Awards Message from the Director Chris Deeney, Defense Science Division One of the bumper stickers for the Science Campaign reads "Putting the Science in QMU." QMU is the Quantification of Margins and Uncertainties, the language by which we communicate certification and assessments. The bumper sticker phrase is based on the

370

Introduction LS-156  

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

LS-156 LS-156 10/15/90 Design of Kicker/Bumper Magnet and PFN for PAR By JU \VANG Al'ID GERALD J.VOLK* The submitted manuscript has been authored by a contractor of the U. S. Government under contract No. W~31·1 09-ENG·38. Accordingly, the U. S. Government retains a nonexclusive, royalty-free license to publish or reproduce the published form of this contribution, or allow others to do so, for U. S. Government purposes. Three fast pulsed kicker!bumper magnets are required in the positron accumulator ring (PAR) for the purpose of beam injection and/or extraction at 450 MeV. According to the Conceptual Design Report (CDR), these three magnets have identical specifications and are expected to produce identical magnetic fields. Therefore, they will have the same design. Each

371

INJECTION SYSTEM DESIGN FOR THE BSNS/RCS.  

SciTech Connect

The BSNS injection system is designed to take one uninterrupted long drift in one of the four dispersion-free straight sections to host all the injection devices. Painting bumper magnets are used for both horizontal and vertical phase space painting. Closed-orbit bumper magnets are used for facilitating the installation of the injection septa and decreasing proton traversal in the stripping foil. Even with large beam emittance of about 300 {pi}mm.mrad used, BSNS/RCS still approaches the space charge limit during the injection/trapping phase for the accumulated particles of 1.9*10{sup 13} and at the low injection energy of 80 MeV. Uniform-like beam distribution by well-designed painting scheme is then obtained to decrease the tune shift/spread. ORBIT code is used for the 3D simulations. Upgrading to higher injection energy has also been considered.

WEI, J.; TANG, J.Y.; CHEN, Y.; CHI, Y.L.; JIANG, Y.L.; KANG, W.; PANG, J.B.; QIN, Q.; QIU, J.; SHEN, L.; WANG, W.

2006-06-23T23:59:59.000Z

372

Injection Molding Compounds  

Science Conference Proceedings (OSTI)

Table 5   Common thermoplastic and thermoset molding compounds...(r) (s) (t) Phenolic Distributor caps, plastic ash trays (a) (b) (g) (h) (i) (j) (k) (l) (m) (n) (o) (q) (r) (s) (t) Urethane Automotive body panels, bumpers (a) (d) (e) (g) (i) (l) (m) (o) (q) (r) (t) Vinyl ester Composite car/truck springs, wheels (b) (d) (e) (g) (i) (j) (k) (l) (m) (n) (o) (p)...

373

DEVELOPMENTAL DYNAMICS 235:1738–1752, 2006 REVIEWS–A PEER REVIEWED FORUM Molecular Genetic Cascades for External Genitalia Formation: An Emerging  

E-Print Network (OSTI)

External genitalia are anatomical structures located at the posterior embryonic region as part of several urogenital/reproductive organs. The embryonic anlage of the external genitalia, the genital tubercle (GT) develops as a bud-shaped structure with an initial urethral plate and later urethra. Embryonic external genitalia are considered to be one of the appendages. Recent experiments suggest that essential regulatory genes possess similar functions for the outgrowth regulation of the GT and limb appendages. The transient embryonic epithelia located in the distal GT are called the distal urethral epithelium (DUE) regulating, at least in part, the (distal) GT development. This review covers the available data about early patterning of GT and discusses the molecular developmental similarities and points of divergence between the different appendages. Development of the male and female external genitalia is also reviewed. Developmental Dynamics

H. Kataoka; A. Kuroiwa; Y. Chen

2006-01-01T23:59:59.000Z

374

B. Grant Logan, 1980 | U.S. DOE Office of Science (SC)  

Office of Science (SC) Website

plasmas confined in magnetic mirror configurations, for his role as the co-inventor of the thermal barrier concept that has revolutionized the outlook for tandem mirror reactors...

375

Sandia National Laboratories Technology Marketing Summaries ...  

Rapid Solar Mirror Characterization with Fringe Reflection Techniques This technology is an automated system in which the reflection of a mirror, ...

376

Ultra-high-resolution optical coherence tomography gets adaptive ...  

Eye Deformable mirror control Deformable mirror AO control Wavefront reconstruction Shack-Hartmann wavefront sensor OCT light source/laser beacon Achromatizing

377

THERMAL PERFORMANCE OF INSULATING WINDOW SYSTEMS  

E-Print Network (OSTI)

Heat Mirrors for Passive Solar Heating Applications", LBLsolar collector and passive solar heating applications with

Selkowitz, Stephen E.

2011-01-01T23:59:59.000Z

378

From Photoshop to Programming Languages An algebraic approach to computation  

E-Print Network (OSTI)

) = (mirror across slash) In fact, all eight transformations can be produced from just two, r = 90 cw s = mirror across vertical #12;Arithmetic with Photoshop r = 90 cw, s = mirror across vertical, = empty product r r · r r · r · r s r · r · s r · s s · r #12;Arithmetic with Photoshop r = 90 cw, s = mirror

Sutton, Brian

379

Mitsubishi Electric Research Labs (MERL) Amit Agrawal Amit Agrawal  

E-Print Network (OSTI)

Scan (MEMS mirror) Microvision Laser Pico TI's DLP, $349 #12;Mitsubishi Electric Research Labs (MERL

Agrawal, Amit

380

CFRC OBSERVATIONS INTRODUCTION  

E-Print Network (OSTI)

the panelists. Student projects mirrored some of these approaches and included the following: Microhydro

Heller, Barbara

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

Introduction Aphids, or plant lice, feed on most vegetable crops, many houseplants and many ornamentals grown in  

E-Print Network (OSTI)

and vegetable crops. Horticultural oil sprays can help to control some aphids on fruit trees and ornamentalsAphids Introduction Aphids, or plant lice, feed on most vegetable crops, many houseplants and many tissue and remove the sap. Aphids can easily be distinguished by the two tube like appendages (cornicles

New Hampshire, University of

382

`Natural selection merely modified while redundancy created' Susumu Ohno's idea of the evolutionary importance of gene and genome  

E-Print Network (OSTI)

or no repression of Dll and appendage development (Panganiban et al. 1995; Averof and Akam 1995; Grenier et al of the GAL4-inducible vector pUAST (Brand et al. 1994). Constructs were injected into white1118 embryos; Grenier et al. 1997; Grenier and Carroll 2000; Shiga et al. 2002). In the case of UBX protein, we propose

Gent, Universiteit

383

Significance of operating experience with poison splines at KE Reactor  

SciTech Connect

The demonstrated operating efficiency performance which has resulted from poison spline usage forces an economic decision concerning the self-supported and bumper fuel element programs. As originally conceived the projection fuel elements would preclude the insertion of a spline under the fuel charge; thus it is very important that means be devised either to make poison spline usage compatible with future pile loadings or to demonstrate that some other supplementary control system, which is compatible with future pile loadings, can approximate the effect the splines have an operating efficiency. This report shows the appreciable performance improvement which has been achieved at KE Reactor through the application of the poison spline system.

Franklin, F.C.

1960-07-15T23:59:59.000Z

384

Chiral objects do not have an internal mirror plane. A simple example of a chiral object is a (winking) smiley, see Figure S1. If the smiley winks (right) it cannot be superimposed on  

E-Print Network (OSTI)

drop or film contactor ? Uniform, well-defined slug size High specific interfacial area Enhanced mass-liquid slug flow (Present Work) 850 - 2600Centrifugal Extractor 35 - 1500Impinging Stream Extractor 280Impinging Streams 175 ­ 250Rotating disk Impinging Streams contactor 150 ­ 250Mixer-settler 0.5 ­ 190

Groningen, Rijksuniversiteit

385

Vessel structural support system  

SciTech Connect

Vessel structural support system for laterally and vertically supporting a vessel, such as a nuclear steam generator having an exterior bottom surface and a side surface thereon. The system includes a bracket connected to the bottom surface. A support column is pivotally connected to the bracket for vertically supporting the steam generator. The system also includes a base pad assembly connected pivotally to the support column for supporting the support column and the steam generator. The base pad assembly, which is capable of being brought to a level position by turning leveling nuts, is anchored to a floor. The system further includes a male key member attached to the side surface of the steam generator and a female stop member attached to an adjacent wall. The male key member and the female stop member coact to laterally support the steam generator. Moreover, the system includes a snubber assembly connected to the side surface of the steam generator and also attached to the adjacent wall for dampening lateral movement of the steam generator. In addition, the system includes a restraining member of "flat" attached to the side surface of the steam generator and a bumper attached to the adjacent wall. The flat and the bumper coact to further laterally support the steam generator.

Jenko, James X. (N. Versailles, PA); Ott, Howard L. (Kiski Twp., Allegheny County, PA); Wilson, Robert M. (Plum Boro, PA); Wepfer, Robert M. (Murrysville, PA)

1992-01-01T23:59:59.000Z

386

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

387

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

388

Method of forming structural heliostat  

DOE Patents (OSTI)

In forming a heliostat having a main support structure and pivoting and tilting motors and gears and a mirror module for reflecting solar energy onto a collector, the improvement characterized by a method of forming the mirror module in which the mirror is laid upon a solid rigid supporting bed in one or more sections, with or without focusing; a mirror backing sheet is applied by first applying respective thin layers of silicone grease and, thereafter, progressively rolling application to eliminate air bubbles; followed by affixing of a substrate assembly to the mirror backing sheet to form a mirror module that does not curve because of thermally induced stresses and differential thermal expansion or contraction effects. The silicone grease also serves to dampen fluttering of the mirror and protect the mirror backside against adverse effects of the weather. Also disclosed are specific details of preferred embodiments.

Anderson, Alfred J. (Littleton, CO)

1984-06-26T23:59:59.000Z

389

Comparison of control algorithms for a MEMS-based adaptive optics scanning laser ophthalmoscope  

Science Conference Proceedings (OSTI)

We compared four algorithms for controlling a MEMS deformable mirror of an adaptive optics (AO) scanning laser ophthalmoscope. Interferometer measurements of the static nonlinear response of the deformable mirror were used to form an equivalent linear ...

Kaccie Y. Li; Sandipan Mishra; Pavan Tiruveedhula; Austin Roorda

2009-06-01T23:59:59.000Z

390

Beryllium based multilayers for normal incidence extreme ultraviolet reflectance  

Science Conference Proceedings (OSTI)

We report the experimental results of beryllium based multilayer mirrors for use in the 11.4 nm region. Mirrors using molybdenum as the high-Z material have demonstrated 68.7% peak reflectance at 11.3 nm.

Skulina, K.; Alford, C.; Bionta, R.; Makowiecki, D. [Lawrence Livermore National Lab., CA (United States); Gullikson, E.; Soufli, R.; Kortright, J.; Underwood, J. [Lawrence Berkeley Lab., CA (United States)

1994-11-01T23:59:59.000Z

391

A High-Performance Hygrometer for Aircraft Use: Description, Installation, and Flight Data  

Science Conference Proceedings (OSTI)

A new cryogenic hygrometer designed for airborne research has been developed. It is based on the well-known chilled-mirror technique, but instead of the usual Peltier elements, liquid nitrogen is used for mirror cooling. The resultant greatly ...

Reinhold Busen; Arden L. Buck

1995-02-01T23:59:59.000Z

392

Linear Concentrator Systems for Concentrating Solar Power | Department...  

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

reflector. The tube is fixed to the mirror structure, and the heated fluid-either a heat-transfer fluid or watersteam-flows through and out of the field of solar mirrors to...

393

The Moon  

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

mirror. That' s what it really is: a sort of mirror that reflects the light of the sun back to us. People used to plan their work, journeys and festivities according to the...

394

Solar reflection panels - Energy Innovation Portal  

A solar collector comprising a glass mirror, and a composite panel, wherein the back of the mirror is affixed to a front surface of the composite panel. The composite ...

395

Solar Reflection Panels - Energy Innovation Portal  

Patent 7,077,532: Solar reflection panels A solar collector comprising a glass mirror, and a composite panel, wherein the back of the mirror is affixed to a front ...

396

Vertically aligned gas-insulated transmission line having particle traps at the inner conductor  

DOE Patents (OSTI)

Gas insulated electrical apparatus having first and second conductors separated by an insulating support within an insulating gas environment, and particle traps disposed along the surface of the high potential conductor for trapping and inactivating foreign particles which may be present within the insulating gas medium. Several embodiments of the invention were developed which are particularly suited for vertically aligned gas insulated transmission lines. The particle traps are grooves or cavities formed into the walls of the tubular inner conductor, without extending into the hollow portion of the conductor. In other embodiments, the traps are appendages or insert flanges extending from the inner conductor, with the insulator supports contacting the appendages instead of the inner conductor.

Dale, Steinar J. (Monroeville, PA)

1984-01-01T23:59:59.000Z

397

Tandem resonator reflectance modulator  

DOE Patents (OSTI)

A wide band optical modulator is grown on a substrate as tandem Fabry-Perot resonators including three mirrors spaced by two cavities. The absorption of one cavity is changed relative to the absorption of the other cavity by an applied electric field, to cause a change in total reflected light, as light reflecting from the outer mirrors is in phase and light reflecting from the inner mirror is out of phase with light from the outer mirrors. 8 figs.

Fritz, I.J.; Wendt, J.R.

1994-09-06T23:59:59.000Z

398

Tandem resonator reflectance modulator  

DOE Patents (OSTI)

A wide band optical modulator is grown on a substrate as tandem Fabry-Perot resonators including three mirrors spaced by two cavities. The absorption of one cavity is changed relative to the absorption of the other cavity by an applied electric field, to cause a change in total reflected light, as light reflecting from the outer mirrors is in phase and light reflecting from the inner mirror is out of phase with light from the outer mirrors.

Fritz, Ian J. (Albuquerque, NM); Wendt, Joel R. (Albuquerque, NM)

1994-01-01T23:59:59.000Z

399

Mechanistic Studies on the Formation of Trifluoromethyl Sulfur Pentafluoride, SF5CF3sa Greenhouse Gas  

E-Print Network (OSTI)

suspended turbo pump backed by an oil-free scroll pump. A rotatable highly polished silver mirror contained

Kaiser, Ralf I.

400

Summary of US-Japan workshop on the theory of non-axisymmetric confinement systems  

SciTech Connect

Summaries are given for the following sessions: (1) stellarators and heliotrons; (2) tandem mirrors; and (3) bumpy torus. (MOW)

1981-01-01T23:59:59.000Z

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.


401

FCMN Confirmed Speakers  

Science Conference Proceedings (OSTI)

... Rick Silver (NIST), “Scatterfield Microscopy, Review of Techniques ... Steigerwald (Carl Zeiss), "A Mirror-Corrected Scanning Electron Microscope"; ...

2013-01-03T23:59:59.000Z

402

NIST Infrared optical properties of materials and components  

Science Conference Proceedings (OSTI)

... on a wide variety of materials including mirrors, filters, windows, coatings and ... specular & diffuse, transmissive & opaque), and covering a wide ...

2012-11-15T23:59:59.000Z

403

Selected References  

Science Conference Proceedings (OSTI)

...R. Hirsch, Exploring Color Photography, 3rd ed., McGraw-Hill, Times Mirror Higher Education Group, 1997...

404

STATUS REPORT NUMBER 1: PERFORMANCE OF ...  

Science Conference Proceedings (OSTI)

... Cross-sectional photomicrograph of a light emitting diode showing device active layers and burried mirror overgrowth. ...

2011-10-19T23:59:59.000Z

405

Performance of 50 Completed ATP Projects  

Science Conference Proceedings (OSTI)

... project. Cross-sectional photomicrograph of a light emitting diode showing device active layers and buried mirror overgrowth. ...

2011-10-19T23:59:59.000Z

406

Title is 24 point Helvetica Bold  

National Nuclear Security Administration (NNSA)

SF 6 Driver Pivot Diaphragm Slot Test Section Interface Air + Acetone Vapor Lenses Laser Mirror Air 6 SF ...

407

Time-dependent hydrogen and helium pressure profiles in a long, cryogenically cooled tube, pumped at periodic intervals  

DOE Green Energy (OSTI)

Many particle accelerators and colliders throughout the world make use of superconducting magnets to focus highly relativistic beams. These magnets are cooled to [approximately]4.2[degree]K For practical reasons, the beam pipes, encircled by the magnets, also operate at these cryogenic temperatures. This paper presents a theoretical model for determining pressure profiles, in space and time, stemming from either hydrogen or helium gas leak into the cold-bore tube with appendage pumps located at periodic intervals. It is shown that a wave-like pressure gradient propagates from the leak source at a rate which is dependent on the leak magnitude, gas species, speed and location of appendage pumps, and the geometry and effective roughness of the cold-bore tube. Steady-state, linear pressure gradients eventually equilibrate between the appendage pumps in a magnitude commensurate with both the adsorption isotherm of the species and mass flow in the beam pipe. Results are given for a variety of conditions relevant to the Relativistic Heavy Ion Collider being constructed at Brookhaven, and a general procedure, with expressions, is provided for the making of similar calculations in other installations.

Hobson, J.P. (National Vacuum Technologies, Inc., Ontario (Canada)); Welch, K.M. (Brookhaven National Lab., Upton, NY (United States))

1992-01-01T23:59:59.000Z

408

Precooler Ring Vacuum System  

DOE Green Energy (OSTI)

The precooler vacuum system, as proposed by FNAL, is based on a suitable modification of the existing Electron Cooling Ring System. Because of the magnetic cycle of the bending magnets, distributed ion pumping, as exists in the Electron Cooling Ring, is not applicable. Instead, the proposed pumping will be done with commercial appendage ion pumps mounted approximately every two meters around the circumference of the ring. The loss of effective pumping speed and non-uniformity of system pressure with appendage pumps may not be major considerations but the large number required does effect experimental and analytical equipment placement considerations. There is a distributed pumping technique available which: (1) is not affected by the magnetic cycle of the bending magnets; (2) will provide a minimum of four times the hydrogen pumping speed of the proposed appendage ion pumps; (3) will require no power during pumping after the strip is activated; (4) will provide the heat source for bakeout; (5) is easily replaceable; and (6) can be purchased, installed, and operated at a generous economic advantage over the presently proposed ion pumped system. The pumping technique referred to is non-evaporable gettering with ST101 Zr/Al pumping strip. A technical description of this pumping strip is given on Data Sheet 1 and 2 attached to this report.

Moenich, J.

1980-10-02T23:59:59.000Z

409

How and why side cooling of high-heat-load optics works.  

SciTech Connect

The temperature gradients in a side-cooled mirror would create a thermal bending moment along the mirror length. For a slender side-cooled mirror with longitudinally uniform incident beam, the tangential slope error is primarily due to the bowing deformation caused by this thermal bending moment. The thermal bending moment depends on the temperature distribution, which is a function of the mirror geometry, heat load, and cooling design. Optimal design of a side-cooled mirror can achieve a 'favorable' temperature profile to make the thermal bending moment, with respect to the substrate neutral plane, approach zero, so that the bowing deformation of the mirror is minimized. To understand the deformation of a side-cooled mirror and achieve an optimal design, a theoretical formulation is developed.

Li, Y.; Khounsary, A.; Nair, S.; Experimental Facilities Division (APS); IIT

2004-01-01T23:59:59.000Z

410

Thermally stabilized heliostat  

DOE Patents (OSTI)

An improvement in a heliostat having a main support structure and pivoting and tilting motors and gears and a mirror module for reflecting solar energy onto a collector, the improvement being characterized by an internal support structure within each mirror module and front and back sheets attached to the internal support structure, the front and back sheets having the same coefficient of thermal expansion such that no curvature is induced by temperature change, and a layer of adhesive adhering the mirror to the front sheet. The adhesive is water repellent and has adequate set strength to support the mirror but has sufficient shear tolerance to permit the differential expansion of the mirror and the front sheet without inducing stresses or currature effect. The adhesive also serves to dampen fluttering of the mirror and to protect the mirror backside against the adverse effects of weather. Also disclosed are specific details of the preferred embodiment.

Anderson, Alfred J. (Littleton, CO)

1983-01-01T23:59:59.000Z

411

Critical illumination condenser for x-ray lithography  

DOE Patents (OSTI)

A critical illumination condenser system, particularly adapted for use in extreme ultraviolet (EUV) projection lithography based on a ring field imaging system and a laser produced plasma source. The system uses three spherical mirrors and is capable of illuminating the extent of the mask plane by scanning either the primary mirror or the laser plasma source. The angles of radiation incident upon each mirror of the critical illumination condenser vary by less than eight (8) degrees. For example, the imaging system in which the critical illumination condenser is utilized has a 200 .mu.m source and requires a magnification of 26.times.. The three spherical mirror system constitutes a two mirror inverse Cassegrain, or Schwarzschild configuration, with a 25% area obstruction (50% linear obstruction). The third mirror provides the final pupil and image relay. The mirrors include a multilayer reflective coating which is reflective over a narrow bandwidth.

Cohen, Simon J. (Pleasanton, CA); Seppala, Lynn G. (Livermore, CA)

1998-01-01T23:59:59.000Z

412

Critical illumination condenser for x-ray lithography  

DOE Patents (OSTI)

A critical illumination condenser system is disclosed, particularly adapted for use in extreme ultraviolet (EUV) projection lithography based on a ring field imaging system and a laser produced plasma source. The system uses three spherical mirrors and is capable of illuminating the extent of the mask plane by scanning either the primary mirror or the laser plasma source. The angles of radiation incident upon each mirror of the critical illumination condenser vary by less than eight (8) degrees. For example, the imaging system in which the critical illumination condenser is utilized has a 200 {micro}m source and requires a magnification of 26. The three spherical mirror system constitutes a two mirror inverse Cassegrain, or Schwarzschild configuration, with a 25% area obstruction (50% linear obstruction). The third mirror provides the final pupil and image relay. The mirrors include a multilayer reflective coating which is reflective over a narrow bandwidth. 6 figs.

Cohen, S.J.; Seppala, L.G.

1998-04-07T23:59:59.000Z

413

Webcasts | Department of Energy  

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

Webcasts Webcasts Webcasts November 1, 2013 - 11:40am Addthis End users interested in combined heat and power (CHP) can participate in free webcasts made available to them through various resources, including those listed below. View presentations and documents from previous webinars and webcasts "CHP: Enabling Resilient Energy Infrastructure" was held on April 3, 2013. Access the webinar recording and presentations. View the report. ITP Tuesday Webcasts May 14, 2009 - CHP: Is It Right For Your Facility? January 8, 2009 - CHP Regional Application Centers Integrated Energy Systems (IES) Webcast, 4 pp, Sept. 2005 and 10-Minute Opening "Bumper", 12 pp, Aug. 2005 U.S. EPA's Clean Distributed Generation (DG) Policy and CHP Webinar Series Addthis Related Articles

414

NETL F 451.1/1-1, Categorical Exclusion Designation Form  

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

5661 5661 USAMP EE Ford, Chrysler, GM PMC/PVT 2012/ 48 months Aaron Yocum Three sites in MI, one in Canada Validation of Material Models for Automotive Carbon-Fiber Composite Structures via Physical and... SUMMARY CX - Computer design, analysis and validation for lightweight front bumper and crush can systems. Adrienne Riggi Digitally signed by Adrienne Riggi DN: cn=Adrienne Riggi, o=NETL, ou=Vehicles, email=Adrienne.Riggi@NETL.DOE.GOV, c=US Date: 2012.02.13 18:08:52 -05'00' 02 13 2012 john ganz Digitally signed by john ganz DN: cn=john ganz, o=netl, ou=environmental compliance division, email=john.ganz@netl.doe.gov, c=US Date: 2012.04.05 13:16:26 -04'00' 4 5 2012 Warren, MI; Dearborn, MI; Southfield, MI; West Ontario, Canada are the four CX(A) locations for this project.

415

Advanced composites III: expanding the technology; Proceedings of the Third Annual Conference, Detroit, MI, Sept. 15-17, 1987  

Science Conference Proceedings (OSTI)

The present conference discusses topics in the design features and methods, manufacturing processes, secondary fabrication techniques, and materials science aspects of advanced composites. Attention is given to composite structural armor for ground combat vehicles, composite structures for automotive energy management, CAD/CAM of braided preforms for advanced composites, composite automobile bumper beams, preforming for structural applications, the three-dimensional braiding of thermoplastic composite preforms, and recent advancements in tooling technology. Also discussed are instrument-grade MMCs for imaging IR guidance systems, automated tape layup of a vertical stabilizer fin, the mechanical properties of thermoplastic matrix composites, surface chemistry and adhesion of SMCs, fiber-matrix bonding, and hybrid yarns for high performance thermoplastic composites.

Not Available

1987-01-01T23:59:59.000Z

416

Slurry line eminent domain urged over rail lands  

Science Conference Proceedings (OSTI)

According to C.E. Bagge of the National Coal Association (NCA), Congress should pass a bill that would grant coal slurry pipelines the right-of-eminent-domain across land held by railroads. An NCA study determined that 85% of the coal shipped by U.S. railroads in 1977 could not have been shipped in any other way, and the NCA feels that the coal market would be improved if the railroads' transport dominance were reduced by the presence of slurry lines. NCA and Senator D. Bumpers would prefer that the bill under consideration be broadened to give slurry lines eminent domain over private lands, but this expansion of powers is considered politically infeasible. According to Senator W. Ford, the proposed bill would be applied primarily in eastern states, rather than in western states, as is generally thought, since eastern railroads usually own their track beds but western railroads are built on federal easements which slurry lines can cross.

Bagge, C.E.

1980-06-09T23:59:59.000Z

417

Midwest electricity price spikes. Hearings Before the Committee on Energy and Natural Resources, US Senate, One Hundred Fifth Congress, Second Session, September 24, 1998  

SciTech Connect

This document contains statements from Jeff Bingaman, Senator from New Mexico; Dale Bumpers, Senator from Arkansas; Jolynn Barry Butler, Commissioner of the Ohio Public Utilities Commission, Columbus Ohio; Larry E. Craig, Senator from idaho; Richard J. Durbin, Senator from Illinois; Rod Grams, Senator from Minnesota; James J. Hoecker, Chairman, Federal Energy Regulatory Commission; Steven J. Kean, Vice President of Government Affairs, Enron Corp.; Mark Millett, Vice President, Steel Dynamics, Inc.; Frank H. Murkowski, Senator from Alaska; Mary Anne Sullivan, General Counsel, Department of Energy; Craig Thomas, Senator from Wyoming; Susan Tomasky, Senior Vice President and General Counsel, American Electric Power Company; and James L. Turner, Vice President for Government and Regulatory Affairs, Cinery Corporation.

NONE

1998-12-31T23:59:59.000Z

418

Federal Onshore Oil and Gas Leasing Program. Oversight hearing before the Subcommittee on Mining and Natural Resources of the Committee on Interior and Insular Affairs, House of Representatives, Ninety-Ninth Congress, First Session, May 7, 1985  

SciTech Connect

A hearing on the management of the Department of Interior's (DOI) Onshore Oil and Gas Leasing Program examined the question of geology versus market forces in determining lease boundaries and lease offerings. At issue was the question of possible fraud and the loss of revenue to states when leases are sold over the counter or by lottery, as described by Senator Dale Bumpers of Arkansas and the Governor of Wyoming, and the potential environmental damage that could result from an accelerated federal leasing program. Representatives of DOI described leasing procedures and efforts to balance the need for orderly exploration while also meeting economic and environmental goals. The witnesses also included representatives of environmental groups, geologists, and the oil and gas industry. An appendix with additional correspondence, statements, and other material submitted for the record follows the testimony of the 13 witnesses.

Not Available

1986-01-01T23:59:59.000Z

419

Modeling electric charge distribution on insulator under electron bombardment: Case of rectangular surface implantation  

SciTech Connect

Despite progress in the study of dielectric properties and the formation of secondary electrons images and especially in the understanding of their mirror curve shape, since the first models for mirror equation were developed, an exact quantitative prediction of the mirror curve for most materials has remained an unsolved problem. In this paper, recent development in the characterization of charge trapping ability of insulators using the scanning electron microscope mirror method (SEMMM) is reviewed. All this work has resulted in unprecedented insights into the early stage of dielectric study and it is also relevant for a deeper understanding of this anomalous effect (mirror effect) as well as for discussion of the factors affecting it. So the dependency of elliptic mirror and the anisotropic effect in the trapping phenomena of charge is highlighted.

Ghorbel, Nouha; Kallel, Ali [LaMaCop, Faculte des sciences de Sfax, Sfax, C.P 3038 (Tunisia); Damamme, Gilles [CEA, Direction des applications Militaires, Ba circumflex timent DAM, B.P. 12, 91680, Bruyeres-Le-Chatel (France)

2012-03-15T23:59:59.000Z

420

Performance testing of the Acurex solar-collector Model 3001-03  

DOE Green Energy (OSTI)

Results are summarized of tests conducted at the Collector Module Test Facility on an Acurex Model 3001-03 Parabolic Trough Concentrating Solar Collector. Test temperaure range was 100/sup 0/C to 300/sup 0/C. Tests were conducted with the collector axis oriented east-west and again with the collector axis oriented north-south. Three collectors were tested: one using polished aluminum mirrors, one using glass mirrors, and another using an aluminized acrylic film mirror.

Dudley, V.E.; Workhoven, R.M.

1982-03-01T23:59:59.000Z

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.


421

Single photon reflection and transmission in optomechanical system  

E-Print Network (OSTI)

Cavity Optomechanical system is speedily approaching the regime where the radiation pressure of a single photon displaces the moving mirror. In this paper, we consider a cavity optomechanical system where the cavity field is driven by an external field. In the limit of weak mirror-cavity couplings, we calculate analytically the reflection and transmission rates for cavity field and discuss the effects of mirror-cavity coupling on the reflection and transmission.

M. A. Khan; S. C. Hou; K. Farooq; X. X. Yi

2013-04-22T23:59:59.000Z

422

Gregorian optical system with non-linear optical technology for protection against intense optical transients  

SciTech Connect

An optical system comprising a concave primary mirror reflects light through an intermediate focus to a secondary mirror. The secondary mirror re-focuses the image to a final image plane. Optical limiter material is placed near the intermediate focus to optically limit the intensity of light so that downstream components of the optical system are protected from intense optical transients. Additional lenses before and/or after the intermediate focus correct optical aberrations.

Ackermann, Mark R. (Albuquerque, NM); Diels, Jean-Claude M. (Albuquerque, NM)

2007-06-26T23:59:59.000Z

423

Fabrication of precision high quality facets on molecular beam epitaxy material  

DOE Patents (OSTI)

Fabricating mirrored vertical surfaces on semiconductor layered material grown by molecular beam epitaxy (MBE). Low energy chemically assisted ion beam etching (CAIBE) is employed to prepare mirrored vertical surfaces on MBE-grown III-V materials under unusually low concentrations of oxygen in evacuated etching atmospheres of chlorine and xenon ion beams. UV-stabilized smooth-surfaced photoresist materials contribute to highly vertical, high quality mirrored surfaces during the etching.

Petersen, Holly E. (Tracy, CA); Goward, William D. (Antioch, CA); Dijaili, Sol P. (Moraga, CA)

2001-01-01T23:59:59.000Z

424

Coming of Age in Rural America: The Educational and Occupational Outcomes of Rural Young Adults.  

E-Print Network (OSTI)

??Many of the issues related to poverty in rural communities are unique to those communities, and do not mirror the issues associated with poverty in… (more)

Kindell, Heather

2009-01-01T23:59:59.000Z

425

Department of Energy to Invest $60 Million to Develop Innovative...  

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

years for applied scientific research to advance cutting-edge Concentrating Solar Power (CSP) technologies. CSP technologies use mirrors to reflect and concentrate sunlight to...

426

Savannah River National Laboratory  

CSP systems function by first using mirrors to direct sunlight into a collector filled with HTF. Once in the collector, the HTF converts the ...

427

NREL: Technology Transfer - Alcoa and NREL Testing New ...  

Commercial CSP systems installed to date use glass mirrors to reflect and concentrate sunlight onto receivers that collect the solar energy and ...

428

A Computational Magnetohydrodynamic Model of a Gasdynamic Fusion Space Propulsion System.  

E-Print Network (OSTI)

??This work advances the gasdynamic mirror (GDM) fusion space propulsion system concept by testing the potential of an advanced aneutronic fusion fuel combination of proton?11boron… (more)

Ohlandt, Chad J. R.

2011-01-01T23:59:59.000Z

429

SOFAST™  

Solar Energy TE HNOLOGI AL ... The integration of a screen ... This system will be an asset for production line characterization for solar mirrors systems while also ...

430

Economics and the Ising model - CECM  

E-Print Network (OSTI)

Dec 24, 2003 ... The context of economics renames these variables to mirror features important in the study of social impact. Word of mouth in neighbour ...

431

Methods of and apparatus for recording images occurring just prior to a rapid, random event  

DOE Patents (OSTI)

An apparatus and a method are disclosed for recording images of events in a medium wherein the images that are recorded are of conditions existing just prior to and during the occurrence of an event that triggers recording of these images. The apparatus and method use an optical delay path that employs a spherical focusing mirror facing a circular array of flat return mirrors around a central flat mirror. The image is reflected in a symmetric pattern which balances astigmatism which is created by the spherical mirror. Delays on the order of hundreds of nanoseconds are possible.

Kelley, Edward F. (Montpelier, ID)

1994-01-01T23:59:59.000Z

432

NETL F 451.1-1/1 Categorical Exclusion (CX) Designation Form  

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

MIRROR TECHNOLOGY WITH OPTIMIZED SHGC Develop a new high-performance R-10 high SHGC window design, review market positioning and evaluate manufacturing solutions required for...

433

Processos quânticos em cavidades com a geometria variável.  

E-Print Network (OSTI)

??In this thesis, we study the quantum deection of ultracold particles by mirrors, the shrinking of free wave packets, the tunnelling of narrow Gaussian packets… (more)

Mauro Antonio Andreata

2004-01-01T23:59:59.000Z

434

SunShot Initiative: Power Tower  

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

Polymeric Mirrors (CSP R&D FOA) Abengoa Solar: Advanced Nitrate Salt Central Receiver Power Plant (Baseload CSP FOA) Abengoa Solar: Reducing the Cost of Thermal Energy Storage...

435

Solar | Department of Energy  

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

Helios USA will build photovoltaic modules such as these this fall. August 6, 2010 Energy 101: Concentrating Solar Power Concentrating solar power technologies use mirrors...

436

Imaging Beyond Optics  

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

Views" piece in that same issue. "Generations of astronomers have used interferometric tests to achieve the proper shape of their mirrors before using them to image the heavens....

437

Controlled fusion physics: experimental  

SciTech Connect

A historical review is given of the experimental thermonuclear research program. The role of pinch devices, mirror machines, tokamak devices, and laser fusion is discussed. (MOW)

Post, R.F.

1975-10-23T23:59:59.000Z

438

Microsoft Word - ev1.doc  

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

Running Lamps Power Windows, Mirrors & Door Locks AMFM Stereo wCassette and CD Player Regenerative Braking with Coastdown Electro-Hydraulic Braking with ABS Electro Windshield...

439

Shekel Technologies | Open Energy Information  

Open Energy Info (EERE)

Turbine), which combines dish-mirror solar concentrators with gas turbines and energy storage for medium and large scale distributed electricity generation. References...

440

Layout 1  

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

pictures and mirrors, away from beds, couches and anywhere people sleep or sit. Brace overhead light fixtures. Install strong latches or bolts on cabinets. Large or heavy...

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

Applying Solar Pyrometallurgy to the Recovery of High-Value Metals ...  

Science Conference Proceedings (OSTI)

It is hoped that by employing solar pyrometallurgy techniques, these regions would ... due to an increased chance of burning out panels on the parabolic mirror.

442

Gyrac-0 plasma synchrotron  

SciTech Connect

The principles and construction of the Gyrac-O are described. The device is a magnetic mirror system that works on ECR heating. (AIP)

Andreev, V.V.; Golovanivskii, K.S.

1985-03-01T23:59:59.000Z

443

ARM - Field Campaign - ARM-FIRE Water Vapor Experiment  

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

Order Data Browell, Edward LASE Order Data Gutman, Seth GPS Order Data Richardson, Scott Chilled Mirror Order Data Sachse, G. Water Vapor Order Data Schmidlin, Francis CM Sondes...

444

No Slide Title  

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

Static Port Sensors Transducers and signal amplifiers Transducers and signal amplifiers * Water vapor chilled mirror and simpler Vaisala system for redundancy on water vapor...

445

Thermometry Calibration Services  

Science Conference Proceedings (OSTI)

... Hygrometers – chilled mirror – electric ... If you are sending an SPRT for calibration, please measure the triple point of water resistance R(TPW ...

2013-06-12T23:59:59.000Z

446

Indirect and Semi-Direct Aerosol Campaign  

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

probes Temperature Mengistu Wolde NCAR reverse flow probe Temperature Walter Strapp EGG chilled mirror hygrometer Humidity Walter Strapp LICOR Water vapor and CO 2 mixing ratio...

447

Negative effect of crystallization on the mechanism of laser damage in a HfO{sub 2}/SiO{sub 2} multilayer  

Science Conference Proceedings (OSTI)

Elucidation of the mechanisms of laser damage is indispensable in realizing high resistance mirrors for the next generation of ultra-short pulse high intensity lasers. In this study, the surface and a section of the laser-damaged area of a laser mirror were observed with a laser microscope and a transmission electron microscope (cross-sectional TEM), respectively. A grain boundary of HfO{sub 2} microcrystal was observed in the damaged area. This observation and an evaluation of the mirror's damage resistance showed that the formation of crystals in the multilayer mirror is one of the major determinants of damage resistance.

Tateno, Ryo [Shimadzu Corporation, 1, Nishinokyo-Kuwabaracho Nakagyo-ku, Kyoto 604-8511 (Japan); Okada, Hajime; Otobe, Tomohito; Kawase, Keigo; Koga, James K.; Kosuge, Atsushi; Nagashima, Keisuke; Sugiyama, Akira [Kansai Photon Science Institute, Japan Atomic Energy Agency, 8-1-7 Umemidai, Kizugawa-shi, Kyoto 619-0215 (Japan); Kashiwagi, Kunihiro [Department of Electrical and Communication Engineering, Faculty of Engineering, Toyo University, 2100, Kujirai Kawagoe-shi, Saitama 350-8585 (Japan)

2012-12-15T23:59:59.000Z

448

A Little Twin Higgs Model  

E-Print Network (OSTI)

introduced in these twin Higgs models. We leave thesequartic into the left-right twin Higgs model, leading to amechanism to the mirror twin Higgs model and established

Goh, Hock-Seng

2008-01-01T23:59:59.000Z

449

Optimization and Multihazard Structural Design  

Science Conference Proceedings (OSTI)

... The water is heated by ground-level computer- controlled rotating mirrors that focus reflected solar rays onto the pipe. The resulting heat is used for ...

2013-07-24T23:59:59.000Z

450

Update, Sept '96  

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

by recent increases in non-academic network traffic. In the long-term, the mirrored distribution also provides a global backup system resistant to localized database...

451

Alignment method for solar collector arrays - Energy ...  

The present invention is directed to an improved method for establishing camera fixture location for aligning mirrors on a solar collector array (SCA) comprising ...

452

2010sr24.doc  

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

The DOE Voluntary Protection Program mirrors a similar program managed by the Occupational Safety and Health Administration. The purpose of the program is to recognize...

453

Stressing Out the Twins in Magnesium | Advanced Photon Source  

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

metals are known to undergo crystallographic twinning, when parts of a grain abruptly flip and create mirror-image copies of themselves. Because twinning also results in new...

454

H--FACET: Alignment Tool for Power Tower HeliostatsFACET ...  

and generate electricity. A heliostat consists of an array of mirror facets. To obtain an optimally concentrated solar flux on the receiver, the ...

455

Custom MEMS (MicroElectroMechanical Systems) - Microsystems Science...  

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

RF Switches Microoptics MEMS Microoptics MEMS Optical Microphone MEMS Mirrors Nano-grating Based Low-G Inertial Sensor Nanophotonic Optical Transducers for displacement...

456

Nanopost Arrays Anchor Molecules, Improve Ion Yields for Laser ...  

Biomass and Biofuels ... mirrors, or a sharpened optical fiber are used to direct the laser radiation at the posts and the target molecules.

457

NIST Tech Beat, October 1999  

Science Conference Proceedings (OSTI)

... a large optical mirror did not exist in the United States at the ... whales collected on native Eskimo subsistence hunts by the Alaska Marine Mammal ...

458

NIST: Atomic Spectroscopy Group - IR-vis-UV FTS optical path  

Science Conference Proceedings (OSTI)

... The NIST Fourier transform spectrometer consists of a folded Michelson interferometer with the two mirrors replaced by cat's-eye retroreflectors. ...

2010-10-05T23:59:59.000Z

459

Hi folks, Sage 4.3.3 was released on February 21, 2010. It is ...  

E-Print Network (OSTI)

It is available for download from www.sagemath.org and its mirrors in source or ..... [Reviewed by Karl-Dieter Crisman] #8007: Craig Citro: Speed up generation ...

460

News Briefs  

Science Conference Proceedings (OSTI)

... Data on ground-state oxygen-atom in- teractions also are needed to understand ... of mirrors allows adjustment of the angle of the incident beam for ...

1998-01-09T23:59:59.000Z

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

Sage Download - microsoft_windows - CECM  

E-Print Network (OSTI)

This is a mirror of Sage - Open Source Mathematics Software. Here, you can download Sage for your system and platform. Not sure what to download?

462

Energy Basics: Concentrating Solar Power  

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

use mirrors to reflect and concentrate sunlight onto receivers that collect solar energy and convert it to heat. This thermal energy can then be used to produce electricity...

463

Strained layer Fabry-Perot device  

DOE Patents (OSTI)

An asymmetric Fabry-Perot reflectance modulator (AFPM) consists of an active region between top and bottom mirrors, the bottom mirror being affixed to a substrate by a buffer layer. The active region comprises a strained-layer region having a bandgap and thickness chosen for resonance at the Fabry-Perot frequency. The mirrors are lattice matched to the active region, and the buffer layer is lattice matched to the mirror at the interface. The device operates at wavelengths of commercially available semiconductor lasers.

Brennan, Thomas M. (Albuquerque, NM); Fritz, Ian J. (Albuquerque, NM); Hammons, Burrell E. (Tijeras, NM)

1994-01-01T23:59:59.000Z

464

NDB Newsletter (Archive)  

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

2000 ANNOUNCEMENT: NDB to release files from data uniformity processing; mmCIF Dictionary updated; Music Atlas highlighted in Science June 2000 NDB Mirror at Institute of...

465

TMS Strategic Plan  

Science Conference Proceedings (OSTI)

Achieve a diversity balance in TMS leadership positions to mirror the diversity balance of the society; Expand the pool of volunteers by increasing the number of  ...

466

NREL: Technology Transfer - NREL and SkyFuel Partnership ...  

... Gee talk about their partnership to develop a thin film to substitute for bulkier glass mirrors on solar-collecting parabolic troughs. ...

467

NREL: Energy Systems Integration - Energy Systems Integration...  

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

and concentrating solar systems are tested. There is an emphasis on measurement of parabolic trough mirror panels. For detailed laboratory specifications, download the Optical...

468

Sandia National Laboratories Information Technology ...  

parabolic trough mirror alignment based on the use of an innovative Theoretical Overlay Photographic (TOP) approach. It is a variation of current ...

469

Self-contained Kondo effect in single molecules  

E-Print Network (OSTI)

data were collected at the SSRL, a national user facilityRadiation Laboratory (SSRL) using a Rh-coated mirror to

Booth, Corwin H.; Walter, Marc D.; Daniel, Million; Lukens, Wayne W.; Andersen, Richard A.

2005-01-01T23:59:59.000Z

470

INTERFEROMETER FOR STUDIES OF THE COSMIC  

E-Print Network (OSTI)

.2 Post R.F., Fowler T.K., Killeen J., Mirin A.A. Concept for a high- power-density mirror fusion reactor

471

ARM - Datastreams - tsiskycover  

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

in box, outside mirror area pixels countbox ( time ) Pixel count: number in camera and sun strip mask pixels countmask ( time ) Pixel count: number total opaque pixels...

472

Optics for Next Generation Synchrotron Sources  

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

synchrotron equipment including; High Precision Slits, Optical Tables, Lead Shielded Beam Pipes, Micro Ion Chambers, Split Two Axis Ion Chambers, Mirror Systems, Monochromators,...

473

A 750-mW, continuous-wave, solid-state laser source at 313 ...  

Science Conference Proceedings (OSTI)

... can be performed with a piezo-electric transducer ... mirror (T = 1.6%), PZT—piezoelectric transducer, M4 ... 3 Energy level diagram for 9Be+, illustrating ...

2011-11-28T23:59:59.000Z

474

arXiv.org help - arXiv usage statistics  

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

by major subject areas through January 2013 Access and download statistics: Today's usage for arXiv.org (not including mirrors) Institutional Usage Statistics: 2009, 2010,...

475

Centrifugal quantum states of neutrons  

E-Print Network (OSTI)

We propose a method for observation of the quasi-stationary states of neutrons, localized near the curved mirror surface. The bounding effective well is formed by the centrifugal potential and the mirror Fermi-potential. This phenomenon is an example of an exactly solvable "quantum bouncer" problem that could be studied experimentally. It could provide a promising tool for studying fundamental neutron-matter interactions, as well as quantum neutron optics and surface physics effects. We develop formalism, which describes quantitatively the neutron motion near the mirror surface. The effects of mirror roughness are taken into account.

V. V. Nesvizhevsky; A. K. Petukhov; K. V. Protasov; A. Yu. Voronin

2008-06-24T23:59:59.000Z

476

Optical humidity sensor  

DOE Patents (OSTI)

An optical dielectric humidity sensor is disclosed which includes a dielectric mirror having multiple alternating layers of two porous water-adsorbent dielectric materials with differing indices of refraction carried by a translucent substrate. A narrow-band polarized light source is positioned to direct light energy onto the mirror, and detectors are positioned to receive light energy transmitted through and reflected by the mirror. A ratiometer indicates humidity in the atmosphere which surrounds the dielectric mirror as a function of a ratio of light energies incident on the detectors. 2 figs.

Tarvin, J.A.

1987-02-10T23:59:59.000Z

477

Optical humidity sensor  

SciTech Connect

An optical dielectric humidity sensor which includes a dielectric mirror having multiple alternating layers of two porous water-adsorbent dielectric materials with differing indices of refraction carried by a translucent substrate. A narrow-band polarized light source is positioned to direct light energy onto the mirror, and detectors are positioned to receive light energy transmitted through and reflected by the mirror. A ratiometer indicates humidity in the atmosphere which surrounds the dielectric mirror as a function of a ratio of light energies incident on the detectors.

Tarvin, Jeffrey A. (Ann Arbor, MI)

1987-01-01T23:59:59.000Z

478

V-shaped resonators for addition of broad-area laser diode arrays  

SciTech Connect

A system and method for addition of broad-area semiconductor laser diode arrays are described. The system can include an array of laser diodes, a V-shaped external cavity, and grating systems to provide feedback for phase-locking of the laser diode array. A V-shaped mirror used to couple the laser diode emissions along two optical paths can be a V-shaped prism mirror, a V-shaped stepped mirror or include multiple V-shaped micro-mirrors. The V-shaped external cavity can be a ring cavity. The system can include an external injection laser to further improve coherence and phase-locking.

Liu, Bo; Liu, Yun; Braiman, Yehuda Y.

2012-12-25T23:59:59.000Z

479

Final report of the Ad Hoc Experts Group on Fusion  

SciTech Connect

The objectives and strategy of the fusion program are reviewed. In particular, tokamaks, mirrors, alternate concepts, plasma physics, and inertial confinement options are reviewed. (MOW)

1978-06-01T23:59:59.000Z

480

Scientific problems of fusion, solved and to be solved  

SciTech Connect

A good comprehensive review of research progress and the present status of research on inertial confinement, tokamak device, and magnetic mirror technology is given. (MOW)

Post, R.F.

1977-11-04T23:59:59.000Z

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

Methods of and apparatus for recording images occurring just prior to a rapid, random event  

DOE Patents (OSTI)

An apparatus and a method are disclosed for recording images of events in a medium wherein the images that are recorded are of conditions existing just prior to and during the occurrence of an event that triggers recording of these images. The apparatus and method use an optical delay path that employs a spherical focusing mirror facing a circular array of flat return mirrors around a central flat mirror. The image is reflected in a symmetric pattern which balances astigmatism which is created by the spherical mirror. Delays on the order of hundreds of nanoseconds are possible.

Kelley, E.F.

1991-12-31T23:59:59.000Z

482

Transcriptional functions of the corepressor Sin3A in skin  

E-Print Network (OSTI)

will be discussed in more detail below. 1.2.5 Sebaceous gland development SGs are an appendage of the IFE are located above the bulge region of the HF and secrete sebum and lipids [Stewart and Downing, 1991]. These secretions from the SGs provide lubrication... -tracing experiments have demonstrated that Lgr6-positive cells in this region can contribute to the SG, IFE and HF postna- tally (although the HF contribution declines with age) [Snippert et al., 2010]. An additional stem cell population, which is distinguished...

Cox, Claire

2013-03-12T23:59:59.000Z

483

Iterative Time Reversal with Tunable Convergence  

E-Print Network (OSTI)

We propose and test an iterative technique for improving the temporal focusing of a time reversal mirror. A single amplification parameter is introduced to tune the convergence of the iteration. The tunable iterative technique is validated by tests on an experimental electromagnetic time reversal mirror, as well as on a novel numerical model.

Biniyam Tesfaye Taddese; Thomas M. Antonsen; Edward Ott; Steven M. Anlage

2011-07-07T23:59:59.000Z

484

A 16-ELEMENT REFLECTION GRID AMPLIFIER Frederic Lecuyer1  

E-Print Network (OSTI)

, which can double as a large metal heat sink. Otherwise, the operation of reflection grid amplifiers to improve common- Mirror/Heat Sink Active GridInput Polarizer Active Grid Output Polarizer E Output Beam E Input Beam E Output Beam Differential Transistor Pair E Input Beam Mirror/Heat Sink Active Grid

485

A Fisher-Rao Metric for Paracatadioptric Images of Lines  

Science Conference Proceedings (OSTI)

In a central paracatadioptric imaging system a perspective camera takes an image of a scene reflected in a paraboloidal mirror. A 360° field of view is obtained, but the image is severely distorted. In particular, straight lines in the scene project ... Keywords: Central projection, Fisher-Rao metric, Hough transform, Line detection, Paraboloidal mirror, Paracatadioptric system, Sobel operator, Trace transform

Stephen J. Maybank; Siohoi Ieng; Ryad Benosman

2012-09-01T23:59:59.000Z

486

Inference of protein-protein interactions by using co-evolutionary information  

Science Conference Proceedings (OSTI)

The mirror tree is a method to predict protein-protein interaction by evaluating the similarity between distance matrices of proteins. It is known, however, that predictions by the mirror tree method include many false positives. We suspected that the ... Keywords: co-evolution, partial correlation coefficient, projection operation, protein-protein

Tetsuya Sato; Yoshihiro Yamanishi; Katsuhisa Horimoto; Minoru Kanehisa; Hiroyuki Toh

2007-07-01T23:59:59.000Z

487

CLEAN POWER Thankstoadvanc-  

E-Print Network (OSTI)

for expensive solar cells. In one design, for example, mirrors fo- cus light on a Stirling engine, a high-performance Stirling engine shuttles a working fluid, such as hydrogen gas, between two chambers (a). The cold chamber to a Stirling engine that converts heat to electricity. The mirrors in the concentrator are positioned to focus

Kirby, Brian J.

488

AN INVESTIGATION OF CERTAIN THERMODYNAMIC LOSSES IN MINIATURE  

E-Print Network (OSTI)

for expensive solar cells. In one design, for example, mirrors fo- cus light on a Stirling engine, a high-performance Stirling engine shuttles a working fluid, such as hydrogen gas, between two chambers (a). The cold chamber to a Stirling engine that converts heat to electricity. The mirrors in the concentrator are positioned to focus

489

REPORT DOCUMENTATION PAGE Form Approved OMB No. 0704-0188 Public reporting burden for this collection of information is estimated to average 1 hour per response, including the time for reviewing instructions, searching existing data sources,  

E-Print Network (OSTI)

for expensive solar cells. In one design, for example, mirrors fo- cus light on a Stirling engine, a high-performance Stirling engine shuttles a working fluid, such as hydrogen gas, between two chambers (a). The cold chamber to a Stirling engine that converts heat to electricity. The mirrors in the concentrator are positioned to focus

490

Optical system for high resolution spectrometer/monochromator  

DOE Patents (OSTI)

An optical system for use in a spectrometer or monochromator employing a mirror which reflects electromagnetic radiation from a source to converge with same in a plane. A straight grooved, varied-spaced diffraction grating receives the converging electromagnetic radiation from the mirror and produces a spectral image for capture by a detector, target or like receiver.

Hettrick, Michael C. (Berkeley, CA); Underwood, James H. (Walnut Creek, CA)

1988-01-01T23:59:59.000Z

491

Hybrid Al/SiC Composite Optics for IFE Applications W. Kowbel, MER Corp., Tucson, AZ And M. Tillack, UCSD, La Jolla, CA  

E-Print Network (OSTI)

Hybrid Al/SiC Composite Optics for IFE Applications W. Kowbel, MER Corp., Tucson, AZ And M. Tillack support of the mirror is a SiC composite. The SiC composite is chosen for the following reasons: 1) Very the mechanical deformations of the mirror's surface are minimized. 3) SiC is a low activation material, so

Tillack, Mark

492

Construction proprietary  

E-Print Network (OSTI)

2. Construction a. The composite mirrors The mirror was made of a graphite #12;ber backing, coated An aerogel radiator can in principle pro- vide hadron separation throughout the full momentum range. However proton aerogel gas GeV mrad 0 50 100 150 200 250 2 4 6 8 10 12 14 track parameters Direct Ray Tracing

493

Condenser for illuminating a ringfield camera with synchrotron emission light  

DOE Patents (OSTI)

The present invention relates generally to the field of condensers for collecting light from a synchrotron radiation source and directing the light into a ringfield of a lithography camera. The present invention discloses a condenser comprising collecting, processing, and imaging optics. The collecting optics are comprised of concave and convex spherical mirrors that collect the light beams. The processing optics, which receive the light beams, are comprised of flat mirrors that converge and direct the light beams into a real entrance pupil of the camera in a symmetrical pattern. In the real entrance pupil are located flat mirrors, common to the beams emitted from the preceding mirrors, for generating substantially parallel light beams and for directing the beams toward the ringfield of a camera. Finally, the imaging optics are comprised of a spherical mirror, also common to the beams emitted from the preceding mirrors, images the real entrance pupil through the resistive mask and into the virtual entrance pupil of the camera. Thus, the condenser is comprised of a plurality of beams with four mirrors corresponding to a single beam plus two common mirrors.

Sweatt, William C. (13027 Arroyo de Vista, Albuquerque, NM 87111)

1996-01-01T23:59:59.000Z

494

Condenser for extreme-UV lithography with discharge source  

DOE Patents (OSTI)

Condenser system, for use with a ringfield camera in projection lithography, employs quasi grazing-incidence collector mirrors that are coated with a suitable reflective metal such as ruthenium to collect radiation from a discharge source to minimize the effect of contaminant accumulation on the collecting mirrors.

Sweatt, William C. (Albuquerque, NM); Kubiak, Glenn D. (Livermore, CA)

2001-01-01T23:59:59.000Z

495

Condenser for illuminating a ringfield camera with synchrotron emission light  

DOE Patents (OSTI)

The present invention relates generally to the field of condensers for collecting light from a synchrotron radiation source and directing the light into a ringfield of a lithography camera. The present invention discloses a condenser comprising collecting, processing, and imaging optics. The collecting optics are comprised of concave and convex spherical mirrors that collect the light beams. The processing optics, which receive the light beams, are comprised of flat mirrors that converge and direct the light beams into a real entrance pupil of the camera in a symmetrical pattern. In the real entrance pupil are located flat mirrors, common to the beams emitted from the preceding mirrors, for generating substantially parallel light beams and for directing the beams toward the ringfield of a camera. Finally, the imaging optics are comprised of a spherical mirror, also common to the beams emitted from the preceding mirrors, images the real entrance pupil through the resistive mask and into the virtual entrance pupil of the camera. Thus, the condenser is comprised of a plurality of beams with four mirrors corresponding to a single beam plus two common mirrors. 9 figs.

Sweatt, W.C.

1996-04-30T23:59:59.000Z

496

JOURNAL OF LIGHTWAVE TECHNOLOGY, VOL. 29, NO. 9, MAY 1, 2011 1343 Hardware Demonstration of Extremely Compact  

E-Print Network (OSTI)

mirrors of one White cell, and we have added additional objective mirrors E1, E2, W1, and W2. Next, we-space design based on the White cell, and alignment is made simple, fast, and robust by the use of slow of the figures in this paper are available online at http://ieeexplore.ieee.org. Digital Object Identifier 10

Anderson, Betty Lise

497

Solar cooker  

SciTech Connect

A solar cooking device made of a flat array of concentric mirrors tilted to focus at a small area, the array being movable mounted on a stand to be movable around a ball joint and with a carrier for a cooking vessel held by a double crank to be at the focal area of the mirrors.

Long, J. B.; Ware, R. R.

1985-12-31T23:59:59.000Z

498

Finite element modeling of concentrating solar collectors for evauation of gravity loads, bending, and optical characterization.  

DOE Green Energy (OSTI)

Understanding the effects of gravity and wind loads on concentrating solar power (CSP) collectors is critical for performance calculations and developing more accurate alignment procedures and techniques. This paper presents a rigorous finite-element model of a parabolic trough collector that is used to determine the impact of gravity loads on bending and displacements of the mirror facets and support structure. The geometry of the LUZ LS-2 parabolic trough collector was modeled using SolidWorks, and gravity-induced loading and displacements were simulated in SolidWorks Simulation. The model of the trough collector was evaluated in two positions: the 90{sup o} position (mirrors facing upward) and the 0{sup o} position (mirrors facing horizontally). The slope errors of the mirror facet reflective surfaces were found by evaluating simulated angular displacements of node-connected segments along the mirror surface. The ideal (undeformed) shape of the mirror was compared to the shape of the deformed mirror after gravity loading. Also, slope errors were obtained by comparing the deformed shapes between the 90{sup o} and 0{sup o} positions. The slope errors resulting from comparison between the deformed vs. undeformed shape were as high as {approx}2 mrad, depending on the location of the mirror facet on the collector. The slope errors resulting from a change in orientation of the trough from the 90{sup o} position to the 0{sup o} position with gravity loading were as high as {approx}3 mrad, depending on the location of the facet.

Christian, Joshua M.; Ho, Clifford Kuofei

2010-04-01T23:59:59.000Z

499

Defects detection of cylindrical object's surface using vision system  

Science Conference Proceedings (OSTI)

This research is aimed to accomplish an automatic visual inspection for the lateral surface of cylindrical objects using cameras and image processing technique. In this paper, the main concern is on the hardware tools that are needed to test the defects ... Keywords: conical mirror, image processing in MATLAB, line scan camera, matrix camera, multiple flat mirrors

M. Ali; M. Mailah; S. Kazi; H. H. Tang

2011-12-01T23:59:59.000Z

500

Photo of the Week | Department of Energy  

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

Photo of the Week Photo of the Week Photo of the Week Addthis Inside the Tandem Mirror Experiment 1 of 28 Inside the Tandem Mirror Experiment This 1978 photo shows two workers inside the Mirror Fusion Test Facility, a magnetic confinement fusion device designed and built at Lawrence Livermore National Laboratory. In this experiment, magnetic mirrors are placed at both ends of a central magnetic tube. Very hot and dense plasmas inside each mirror enhanced the confinement of another plasma inside the central tube, where the bulk of the fusion would occur. Image: Lawrence Livermore National Laboratory Date taken: 2012-12-28 12:00 Rocky Flats Wildlife Refuge 2 of 28 Rocky Flats Wildlife Refuge The Rocky Flats Plant was first established in 1951 as a nuclear weapons manufacturing facility. Today, almost 4,000 acres make up the Rocky Flats