Proceedings of 1994 IEEE 21st International Conference on Plasma Sciences (ICOPS)最新文献_第3页

Double Shell Liner Implosion Experiments 双壳衬里内爆实验

Proceedings of 1994 IEEE 21st International Conference on Plasma Sciences (ICOPS) Pub Date : 1994-06-06 DOI: 10.1109/PLASMA.1994.588927

S. Sorokin, S. Chaikovsky

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analysis Of Barium Loss From Fluorescent Lamp Electrodes 荧光灯电极中钡的损耗分析

Proceedings of 1994 IEEE 21st International Conference on Plasma Sciences (ICOPS) Pub Date : 1994-06-06 DOI: 10.1109/PLASMA.1994.589104

Y.M. Li, P. Moskowitz

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Design Of 8.5 GHz Fundamental And 17 GHz Second Harmonic Gyroklystron Experiments With 100 Mw Output Power Capability 输出功率为100mw的8.5 GHz基频和17 GHz次谐波回旋速调管实验设计

Proceedings of 1994 IEEE 21st International Conference on Plasma Sciences (ICOPS) Pub Date : 1994-06-06 DOI: 10.1109/PLASMA.1994.588797

J. Calame, W. Lawson, J. Cheng, M.K.E. Klaherty, B. Hogan, P. Latham, V. Irwin, H. Matthews, Matthias Reiser, V. Granatstein

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Synchronization Of Streak And Framing Camera Measurements Of An Intense Relativistic Electron Beam Propagating Through Gas 条纹相机与分幅相机同步测量气体中传播的强相对论电子束

Proceedings of 1994 IEEE 21st International Conference on Plasma Sciences (ICOPS) Pub Date : 1994-06-06 DOI: 10.1109/PLASMA.1994.588944

D. Weidman, D. Murphy, M. Myers, R.A. Meger

{"title":"Synchronization Of Streak And Framing Camera Measurements Of An Intense Relativistic Electron Beam Propagating Through Gas","authors":"D. Weidman, D. Murphy, M. Myers, R.A. Meger","doi":"10.1109/PLASMA.1994.588944","DOIUrl":"https://doi.org/10.1109/PLASMA.1994.588944","url":null,"abstract":"The expansion of the radius of a 5 MeV, 20 kA, 40 ns electron beam from SuperIBEX during propagation through gas is being measured. The beam is generated, conditions, equilibrated, and then passed through a thin foil that produces Cherenkov light, which is recorded by a streak camera. At a second location, the beam hits another Cherenkov emitter, which is viewed by a framing camera. Measurements at these two locations can provide a time-resolved measure of the beam expansion. The two measurements, however, must be synchronized with each other, because the beam radius is not constant throughout the pulse due to variations in beam current and energy. To correlate the timing of the two diagnostics, several shots have been taken with both diagnostics viewing Cherenkov light from the same foil. Experimental measurements of the Cherenkov light from one foil viewed by both diagnostics will be presented to demonstrate the feasibility of correlating the diagnostics with each other. Streak camera data showing the optical fiducial, as well as the final correlation of the two diagnostics, will also be presented. Preliminary beam radius measurements from Cherenkov light measured at two locations will be shown.","PeriodicalId":254741,"journal":{"name":"Proceedings of 1994 IEEE 21st International Conference on Plasma Sciences (ICOPS)","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1994-06-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128039059","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Sheet Beam Slow-wave Amplifiers 片波束慢波放大器

Proceedings of 1994 IEEE 21st International Conference on Plasma Sciences (ICOPS) Pub Date : 1994-06-06 DOI: 10.1109/PLASMA.1994.589156

H. Kiroloust, J. Joe, M. Basten, J. Booske, J. Scharer, Anderson, R. True, G. Scheitrum

{"title":"Sheet Beam Slow-wave Amplifiers","authors":"H. Kiroloust, J. Joe, M. Basten, J. Booske, J. Scharer, Anderson, R. True, G. Scheitrum","doi":"10.1109/PLASMA.1994.589156","DOIUrl":"https://doi.org/10.1109/PLASMA.1994.589156","url":null,"abstract":"Sheet electron beams used in conjunction with slow-wave (Cerenkov) structures are a promising way to realize higher average power millimeter-wave amplifiers. For example, a sheet beam with a meander line structure is proposed to obtain a 100 watt W-band power booster amplifier. A sheet beam with a tapered grating structure is also being considered as a wideband ({approximately} 10--20% instantaneous bandwidth) Ka-band amplifier with approximately 10 kW of average output power. The authors describe results of research that examine critical technological issues relevant to the realization of the proposed devices. The method of forming a sheet beam using magnetic quadrupole lenses and focusing it using periodically-cusped magnetic (PCM) fields are discussed. A pencil beam from a 10 kV, 0.25 A Pierce electron source is used for the initial investigations. The EGUN simulations with the measured magnetic field indicates that a thin (2 mm dia.) beam is available at the interaction region. Beam characterization has been performed using current density probes and an electrostatic velocity spread analyzer. Numerical modeling and cold test measurements of a tapered slow-wave structure together with the simulations and measurements of small-signal gain and bandwidth are also presented.","PeriodicalId":254741,"journal":{"name":"Proceedings of 1994 IEEE 21st International Conference on Plasma Sciences (ICOPS)","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1994-06-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128081012","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Detector For Fusion Burn-history Measurements 探测器的融合燃烧历史测量

Proceedings of 1994 IEEE 21st International Conference on Plasma Sciences (ICOPS) Pub Date : 1994-06-06 DOI: 10.1109/PLASMA.1994.588871

R. Lerche, D. Phillion, G. Tietbohl

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Emission Gating At Uhf And Microwave Frequencies 超高频和微波频率发射门控

Proceedings of 1994 IEEE 21st International Conference on Plasma Sciences (ICOPS) Pub Date : 1994-06-06 DOI: 10.1109/PLASMA.1994.589155

M. Kodis, R. Vanderplaats, H. Freund, E.G. Zaidman, B. Goplen, D. Smithe

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Poneromotive effects on magnetic fields and electron transport under fast ignitor conditions 快速点火器条件下对磁场和电子输运的磁动效应

Proceedings of 1994 IEEE 21st International Conference on Plasma Sciences (ICOPS) Pub Date : 1994-06-06 DOI: 10.1109/PLASMA.1994.589131

R. Mason, M. Glinsky, M. Tabak

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Studies Of Low Q Slow Wave Structures For Relativistic Backward Wave Devices 相对论后向波器件的低Q慢波结构研究

Proceedings of 1994 IEEE 21st International Conference on Plasma Sciences (ICOPS) Pub Date : 1994-06-06 DOI: 10.1109/PLASMA.1994.589067

J. Weaver, S. Kobayashi, Y. Carmel, W. Main, G. Nusinovich, K. Ogurat, M.R. Amint, S. Watanabet, K. Minamit, J. Tate, A. Bromborskyt, W. Destler, V. Granatstein

{"title":"Studies Of Low Q Slow Wave Structures For Relativistic Backward Wave Devices","authors":"J. Weaver, S. Kobayashi, Y. Carmel, W. Main, G. Nusinovich, K. Ogurat, M.R. Amint, S. Watanabet, K. Minamit, J. Tate, A. Bromborskyt, W. Destler, V. Granatstein","doi":"10.1109/PLASMA.1994.589067","DOIUrl":"https://doi.org/10.1109/PLASMA.1994.589067","url":null,"abstract":"The slow wave structure supporting the beam-wave interaction in a relativistic backward wave oscillator (BWO) requires a carefully designed output waveguide in order to couple the electromagnetic wave to a radiating antenna. The coupling between these two sections determines the quality factor (Q) of the slow wave structure and affects the starting current and the saturation processes occurring when the electron beam is injected into the device. For some applications, the end reflection and quality factor are made as low as possible over a wide frequency band. The authors goal has been to study the end reflection and quality factor of a practical slow wave structure both experimentally and numerically. When both ends of the slow wave structure are shorted, a resonant cavity is formed that can have a high quality factor (1,000--3,000) since the only losses are due to ohmic heating of the cavity walls. By introduction of an output section additional diffractive losses are created. The width of the resonances grows larger, i.e. the Q of the cavity has been lowered to 200--300 in some cases. The quality factors for all the axial modes of the TM{sub 01} mode in a closed cavity have been measured as havemore » the quality factors for the same modes when the cavity is coupled to a smooth, linearly tapered output section. From these two sets of data, the magnitude of the reflection coefficient has been calculated. A calculation of the Q-value has also been completed.« less","PeriodicalId":254741,"journal":{"name":"Proceedings of 1994 IEEE 21st International Conference on Plasma Sciences (ICOPS)","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1994-06-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132369763","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

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Comprehensive Diagnostic Set For Intense Lithium Ion Hohlraum Experiments On Pbfa II Pbfaⅱ强锂离子高温实验综合诊断装置

Proceedings of 1994 IEEE 21st International Conference on Plasma Sciences (ICOPS) Pub Date : 1994-06-06 DOI: 10.1109/PLASMA.1994.589027

R. Leeper, J. Bailey, A. Carlson, G. Chandler, M.S. Derzon, R.J. Dukart, D. Hebron, L. P. Mix, A. Moats, T. Nash, D. Noack, W. Olson, J. Porter, C. Ruiz, F.A. Schmidlapp, M. Stark, J. Torres, D. Wenger, R. Olsen

{"title":"Comprehensive Diagnostic Set For Intense Lithium Ion Hohlraum Experiments On Pbfa II","authors":"R. Leeper, J. Bailey, A. Carlson, G. Chandler, M.S. Derzon, R.J. Dukart, D. Hebron, L. P. Mix, A. Moats, T. Nash, D. Noack, W. Olson, J. Porter, C. Ruiz, F.A. Schmidlapp, M. Stark, J. Torres, D. Wenger, R. Olsen","doi":"10.1109/PLASMA.1994.589027","DOIUrl":"https://doi.org/10.1109/PLASMA.1994.589027","url":null,"abstract":"Development of Transient Internal Probe (TIP) Magnetic Field Diagnostic. J.P. Galambos, MA. Bohnet, T.R. Jarboe, A.T. Mattick, t h d j $ %&+ The Transient Internal Probe (TIP) is designed to permit measurement of internal magnetic fields in hot, high density plasmas. The concept consists of accelerating a probe to high velocities (2.2 Km/s) in order to minimize probe exposure time to plasma. Faraday rotation within the probe is used to measure the local magnetic field. An Argon laser illuminates the probe consisting of a Faraday-rotator material with a retro-reflector that r e m s the incident light to the detection system. Performance results of the light gas gun and optical detection system will shown. To date, the gas gun has been extensively tested consistently achieving velocities between 2 and 3 Ms. The probe and detection scheme have been tested by dropping the probe through a static magnetic field. Magnetic field resolution of 20 gauss and spatial resolution of 5 mm has been achieved. System frequency response is 10Mhz. Work is currently being conducted to integrate the diagnostic system with laboratory plasma experiments. Specifically a gas interfaced system has been developed to prevent helium muzzle gas from entering the plasma chamber with the probe. Additionally the probe must be separated from the sabot which protects the probe during acceleration in the gas gun. Data will be presented showing the results of various separation techniques. Results of pressure measurements illustrating the effectiveness of the gas interface system will also be presented. The diagnostic is scheduled to make measurements on the Helicity Injected Toms (HIT) at the University of Washington. 4P29","PeriodicalId":254741,"journal":{"name":"Proceedings of 1994 IEEE 21st International Conference on Plasma Sciences (ICOPS)","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1994-06-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130160105","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0