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Alexandrovich, D.V.; Baranov, S.V.; Didenko, A.N.; Filipenko, N.M.; Fomenko, G.P.; Pozdeev, V.V.; Sulakshin, A.S.; Maidanovskii, A.S.; Novikov, S.S.
Beams 92: Proceedings. Volume 3, Microwaves, Free electron lasers, Advanced accelerators, Applications, and Plasma discharges1992
Beams 92: Proceedings. Volume 3, Microwaves, Free electron lasers, Advanced accelerators, Applications, and Plasma discharges1992
AbstractAbstract
[en] Calculations of microwave radiation power dependence upon magnetron parameters with a real voltage pulse shape being considered showed fairly good agreement with similar dependencies obtained experimentally. This allowed to choose magnetron optimal parameters in agreement with a high current accelerator as a power source. Next way to increase radiated power is to sum up powers of some pulse relativistic magnetrons. A scheme is based on the principle of nonsymmetry allowing a rather strong mismatch of magnetrons eigenfrequencies and being not so critical to a choice of connection line length. The strong coupling provides fast phase locking and high efficiency of the pulse powers addition
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Mosher, D.; Cooperstein, G. (Naval Research Lab., Washington, DC (United States)) (eds.); Maryland Univ., College Park, MD (United States); 681 p; 1992; p. 1574-1579; 9. international conference on high power particle beams; Washington, DC (United States); 25-29 May 1992; Also available from OSTI as DE94014785; NTIS
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Report
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Lofgren, E.J.
Lawrence Berkeley Lab., CA (United States). Funding organisation: USDOE, Washington, DC (United States)1994
Lawrence Berkeley Lab., CA (United States). Funding organisation: USDOE, Washington, DC (United States)1994
AbstractAbstract
[en] The discovery of the Principle of Phase Stability by Vladimir Veksler and Edwin McMillian and the end of the war released a surge of accelerator activity at the Lawrence Berkeley Laboratory (then The University of California Radiation Laboratory). Six accelerators incorporating the Principle of Phase Stability were built in the period 1945--1954
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Source
Jul 1994; 8 p; 50. anniversary of the phase stability principle meeting; Moscow (Russian Federation); 12-15 Jul 1994; HIFAN--667; CONF-9407133--2; CONTRACT AC03-76SF00098; Also available from OSTI as DE95002339; NTIS; US Govt. Printing Office Dep
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Souza, D.F. de; Padua, R.P.; Mariano, W.A.
Proceedings of the 9. Brazilian Congress of Engineering and Material Science - v.21990
Proceedings of the 9. Brazilian Congress of Engineering and Material Science - v.21990
AbstractAbstract
[en] The crystalline phases ratio cubic/monoclinic or cubic/tetragonal in the PSZ/Mg zirconia account for its high thermal shock resistence. The optimization of the phases ratio is obtained through thermal annealing after sinterization. This work presents the effect of iron and silicon on the thermal annealing of ZrO2 + 4% MgO ceramic. (author)
Original Title
Efeito de impurezas na estabilidade termica de zirconia
Primary Subject
Source
Instituto de Pesquisas Energeticas e Nucleares (IPEN), Sao Paulo, SP (Brazil); 519 p; 1990; p. 909-913; 9. Brazilian Congress of Engineering and Material Science; Aguas de Sao Pedro, SP (Brazil); 9-12 Dec 1990; Available from the Library of Comissao Nacional de Energia Nuclear, RJ, Brazil
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Miscellaneous
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Conference
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AbstractAbstract
[en] We study the entanglement dynamics of two atoms with initial tripartite entangled W-like state in the Tavis–Cummings model. We find that the entanglement evolvement is sensitive not only to the entanglement degree of the initial state but also to the concrete form of the initial state. The so-called sudden death effect occurs only for some initial states
Primary Subject
Source
Available from http://dx.doi.org/10.1088/0256-307X/25/3/006; Country of input: International Atomic Energy Agency (IAEA)
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Journal Article
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Gross, A.F.
Stanford Linear Accelerator Center, Menlo Park, CA (United States); Stanford Synchrotron Radiation Lab. (United States). Funding organisation: USDOE Office of Science (United States)2001
Stanford Linear Accelerator Center, Menlo Park, CA (United States); Stanford Synchrotron Radiation Lab. (United States). Funding organisation: USDOE Office of Science (United States)2001
AbstractAbstract
No abstract available
Primary Subject
Source
SLAC-REPRINT--2001-145; AC03-76SF00515
Record Type
Journal Article
Journal
Langmuir; ISSN 0743-7463;
; (1Jan2001issue); [v p.]

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Blackmore, E.W.; Dohan, D.A.; Mackenzie, G.H.; Poirier, R.
9. International conference on cyclotrons and their applications1982
9. International conference on cyclotrons and their applications1982
AbstractAbstract
[en] By using a system of internal phase-defining slits, beams with energy resolution δE/E approximately equal to 1:1000 have been attained at TRIUMF. The eventual aim of an energy spread of <100 keV implies separated turn extraction over the entire energy range of 200-520 MeV. To achieve this, work has proceeded toward the following three requirements: i) beam phase stability of +-20, ii) rf voltage stability of δV/V = 5x10-5 and iii) flat-topping of the rf fundamental with the addition of a third harmonic. Phase stability of +-1.50 has been demonstrated for several hours, using 3 software feedback loops: i) slow magnet drifts measured with an NMR probe to control the magnet power supply; ii) fast fluctuations in the field detected with an outer trim coil provide a correction to the rf frequency; and iii) phase fluctuations measured with the beam itself provide a final rf frequency correction. These loops have been implemented with dedicated CAMAC-based microprocessors
Primary Subject
Source
Gendreau, G. (ed.); 885 p; 1982; p. 485-487; Les Editions de la Physique; Les Ulis (France); 9. International conference on cyclotrons and their applications; Caen (France); 7 - 10 Sep 1981
Record Type
Book
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Conference
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Delayen, J.R.
California Inst. of Tech., Pasadena (USA)1978
California Inst. of Tech., Pasadena (USA)1978
AbstractAbstract
[en] The problem of phase and amplitude stabilization of the fields in superconducting resonators is described. The problem arises from the fast (approx. 50 Hz) resonator eigenfrequency modulation of magnitude (approx. 100 Hz) which is much larger than the resonator bandwidth (approx. 10 Hz). The problem is compounded by the fact that the coupling between the electrical and mechanical modes of the resonator can lead to instabilities (ponderomotive instabilities). The solution suggested involves operating the resonators in self-excited loops, and electronically modifying the loop parameters in order to lock the loop oscillations to an external phase and amplitude reference without attempt to modify the instantaneous resonator eigenfrequency. It is found that this method of phase stabilization is well suited to resonators with small energy contents and small eigenfrequency deviations since the power required is equal to their product; this occurs when the loaded bandwidth of the resonator is twice the maximum eigenfrequency deviation to be compensated for. It is also found that when the loop is free-running, the field amplitude is stable and no ponderomotive instabilities are present as long as the non-ideal effects are limited. When the loop is locked to an external phase and amplitude reference, ponderomotive instabilities can occur; however, the loop can be made stable by adjustment of the loop phase shift, and the stable range can be increased by using high amplitude and phase feedback gains. It is also found that under certain feedback conditions, the error on the particle energy gain can be made to vanish, although residual phase and amplitude errors are still present. A microprocessor-controlled feedback system based on this analysis is then described and results of experiments performed in conjunction with a 150 MHz lead (Pb) plated superconducting split-ring resonator are presented. The experiments show excellent agreement with the analysis
Original Title
Caltech project
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Source
1978; 148 p; University Microfilms Order No. 78-15,210; Thesis (Ph. D.).
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Report
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Thesis/Dissertation
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AbstractAbstract
No abstract available
Source
1975; 2 p; 4. international transplutonium element symposium; Baden-Baden, F.R. Germany; 13 Sep 1975; 14 refs. Short communication only. Available from ZAED. Proceedings will be published.
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AbstractAbstract
[en] Lead zirconate titanate (PZT) piezoelectric ceramics were driven in a resonant mode at various power levels. The stability of the PZT piezoelectric ceramics is found to depend greatly on the driving power level. At low driving power, the ceramics are very stable and the properties remain unchanged after continuous vibration for long periods of time. When the driving power is relatively high, however, an obvious temperature rise is observed in the ceramics during vibration and serious degradation occurs to the properties of the ceramics after some periods of continuous vibration. As the properties of the degraded ceramics are restored after an ageing process, it is proposed that high power resonant driving causes a de-ageing effect on PZT piezoelectric ceramics, which leads to degradation. The heat generated in PZT ceramics by driving with relatively high power is proved to play a vital role in the de-ageing effect
Source
IUMRS-ICEM2002 - Symposium N: 8. IUMRS international conference on electronic materials; Xi'an (China); 10-14 Jun 2002; S0921510702005226; Copyright (c) 2002 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA)
Record Type
Journal Article
Literature Type
Conference
Journal
Materials Science and Engineering. B, Solid-State Materials for Advanced Technology; ISSN 0921-5107;
; CODEN MSBTEK; v. 99(1-3); p. 203-206

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Saal, James E.; Berglund, Ida S.; Sebastian, Jason T.; Liaw, Peter K.; Olson, Greg B.
QuesTek Innovations LLC, Evanston, IL (United States). Funding organisation: USDOE Office of Science - SC (United States)2017
QuesTek Innovations LLC, Evanston, IL (United States). Funding organisation: USDOE Office of Science - SC (United States)2017
AbstractAbstract
[en] Long-term stability of high entropy alloys (HEAs) is a critical consideration for the design and practical application of HEAs. It has long been assumed that many HEAs are a kinetically-stabilized metastable structure, and recent experiments have confirmed this hypothesis by observing HEA ecomposition after long-termequilibration. In the presentwork,we demonstrate the use of the CALculation of PHAse Diagrams (CALPHAD) approach to predict HEA stability and processing parameters, comparing experimental long-term annealing observations to CALPHAD phase diagrams from a commercially-available HEA database. As a result, we find good agreement between single- and multi-phase predictions and experiments.
Primary Subject
Source
OSTIID--1405304; SC0013220; Available from http://www.osti.gov/pages/biblio/1405304; DOE Accepted Manuscript full text, or the publishers Best Available Version will be available free of charge after the embargo period; Country of input: United States
Record Type
Journal Article
Journal
Scripta Materialia; ISSN 1359-6462;
; v. 146(C); p. 5-8

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