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

Git8 Long Conduction PCS Operation At 5ma Current Level Git8长导通PCS工作在5ma电流水平

Proceedings of 1994 IEEE 21st International Conference on Plasma Sciences (ICOPS) Pub Date : 1994-12-31 DOI: 10.1109/PLASMA.1994.589003

A. Kim, B.M. Kovalohuk, V. Kokshenev, S. Loginov

{"title":"Git8 Long Conduction PCS Operation At 5ma Current Level","authors":"A. Kim, B.M. Kovalohuk, V. Kokshenev, S. Loginov","doi":"10.1109/PLASMA.1994.589003","DOIUrl":"https://doi.org/10.1109/PLASMA.1994.589003","url":null,"abstract":"The long conduction POS technology is studied on GIT8 since 1992. The usual type POS with radial plasma injection has demonstrated slow opening into small impedance load simulating z-pinch load conditions. Also in this POS large amount of plasma was pushed by EM force into load region located about 60 cm downstream during 1.3 {mu}s conduction time. To avoid these problems a new POS design was developed called PSIPS (Plasma Switch with Inertial Plasma Stopping). The first PSIPS version was studied on GIT4. The idea is to inject plasma with high initial velocity between coaxial electrodes in direction opposite to that of the EM force. In this case part of the conduction time plasma moves along from the load, then stops and changes the direction of its movement to the opposite one. As a result the total time until plasma is removed from the switch region increases without increasing plasma mass and/or cathode diameter. The PSIPS operation at 40 kV charging voltage on GIT8 has demonstrated improved opening into small impedance load compared to the usual POS with radial injection. With cathode diameter of 160 mm it opens at 2.6 MA peak conduction current at a charge time of 1.3more » {mu}s.« less","PeriodicalId":254741,"journal":{"name":"Proceedings of 1994 IEEE 21st International Conference on Plasma Sciences (ICOPS)","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1994-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131727797","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

Inductively-loaded Extended Gaps For Relativistic Klystrons 相对论速调管的电感负载扩展间隙

Proceedings of 1994 IEEE 21st International Conference on Plasma Sciences (ICOPS) Pub Date : 1994-12-31 DOI: 10.1109/PLASMA.1994.589114

M. Lampe, R. Hubbard, M. Friedman, V. Serlin

{"title":"Inductively-loaded Extended Gaps For Relativistic Klystrons","authors":"M. Lampe, R. Hubbard, M. Friedman, V. Serlin","doi":"10.1109/PLASMA.1994.589114","DOIUrl":"https://doi.org/10.1109/PLASMA.1994.589114","url":null,"abstract":"As the power and the frequency of a relativistic klystron increase, design of both modulation and extraction cavities becomes increasingly difficult. If the gap is narrow, the rf electric field begins to exceed breakdown limits. On the other hand, if the gap width exceeds a small fraction of a wavelength, typical extraction modes do not couple well, and space charge potential energy reduces efficiency and limits the current that can cross the gap. The authors present theoretical investigations, numerical simulations, and initial experimental results on a novel gap design which incorporates an inductively-loaded return-current structure. The structure consists of a series of washers (e.g., 25 in the device which has been built), mounted on a small number (e.g., four) of longitudinal conducting posts which bridge the gap. The unmodulated component of the beam current induces a return current which flows freely in the posts; as a result, the beam`s unmodulated space charge is nearly completely neutralized. The washers serve to increase the capacitive coupling between the beam and the structure, and to provide azimuthal symmetry for the charge on the structure. However, the inductance of the posts is sufficient to inhibit rf return current, and thus the structure sustains themore » longitudinal rf field in the cavity. With appropriate choice of resonant modes, it appears that gap widths exceeding a half wavelength can be used for modulation of high-current beams, as well as extraction of rf energy with high efficiency.« less","PeriodicalId":254741,"journal":{"name":"Proceedings of 1994 IEEE 21st International Conference on Plasma Sciences (ICOPS)","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1994-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126413634","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: 1

Maximum Orbit Excursion Near Magnetoresonance In A Magnetostatic Wiggler With A Guide Magnetic Field 带导向磁场的静磁摆动器在磁共振附近的最大轨道偏移

Proceedings of 1994 IEEE 21st International Conference on Plasma Sciences (ICOPS) Pub Date : 1994-06-06 DOI: 10.1109/PLASMA.1994.588699

Junsheng Yu, W. Gillespie

引用次数: 0

An Alternative Explanation Of The Cobe Data Cobe数据的另一种解释

Proceedings of 1994 IEEE 21st International Conference on Plasma Sciences (ICOPS) Pub Date : 1994-06-06 DOI: 10.1109/PLASMA.1994.589107

E. Lerner

引用次数: 0

Pic simulation And Analytic modelling Of both Long and Short-pulse Magnetically Insulated Transmission Lines 长脉冲和短脉冲磁绝缘输电线路的Pic仿真与解析建模

Proceedings of 1994 IEEE 21st International Conference on Plasma Sciences (ICOPS) Pub Date : 1994-06-06 DOI: 10.1109/PLASMA.1994.588942

S. Rosenthal, C. Mendel

{"title":"Pic simulation And Analytic modelling Of both Long and Short-pulse Magnetically Insulated Transmission Lines","authors":"S. Rosenthal, C. Mendel","doi":"10.1109/PLASMA.1994.588942","DOIUrl":"https://doi.org/10.1109/PLASMA.1994.588942","url":null,"abstract":"It is crucial to have appropriate tools for MITL design. This need is emphasized by the number of new pulsed power accelerators presently in the feasibility-study and design stages. MITL systems are essential components of most of these accelerators. MITLs are typically modeled by Telegrapher`s equations that treat electrons only through a voltage and current-dependent loss front current. The electron flow behind the loss front in a MITL system must also be included adequately in a model if it is to accurately determine the power and energy available to the load of a MITL. Often electromagnetic, relativistic PIC simulations must be done to characterize specific MITL designs. However, rather than concentrate on simulations of a specific geometry, they have recently done ensembles of simulations of generic MITL systems and have found patterns in the results that validate the use of a generalized set of Telegrapher`s equations which include electron flow. The fit to this pattern provides the value of a parameter, determined by the electron dynamics, used in the model. The simulations have also demonstrated features whose assumption makes the analytic model very simple to implement. One of these simplifying assumptions is that the flow impedance is essentially constant, nearlymore » independent of load impedance even in a short line. The new modeling equations should prove useful for the accurate characterization of MITLs, allowing one to easily predict load power and energy for a variety of system designs. The authors show a number of sample calculations from the model with corresponding simulation results for comparison.« less","PeriodicalId":254741,"journal":{"name":"Proceedings of 1994 IEEE 21st International Conference on Plasma Sciences (ICOPS)","volume":"96 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":"127229364","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

Properties Of Argon-lithium Diacharges In A Microwave Resonant Cavity 微波谐振腔中氩锂放电特性研究

Proceedings of 1994 IEEE 21st International Conference on Plasma Sciences (ICOPS) Pub Date : 1994-06-06 DOI: 10.1109/PLASMA.1994.589009

C. Brooks, M. Brake, R.M. Gilgenback

引用次数: 0

Surface Magnetoplasma Waves In The Rectangular Cross- Sectional Metallic Waveguide With Uniform Plasma Fillng 均匀等离子体填充矩形截面金属波导中的表面磁等离子体波

Proceedings of 1994 IEEE 21st International Conference on Plasma Sciences (ICOPS) Pub Date : 1994-06-06 DOI: 10.1109/PLASMA.1994.588832

I. Girka

引用次数: 0

Substorm Onsets And Single Ion Motion 亚暴爆发和单离子运动

Proceedings of 1994 IEEE 21st International Conference on Plasma Sciences (ICOPS) Pub Date : 1994-06-06 DOI: 10.1109/PLASMA.1994.588765

P. Rothwell, M. Silevitch, L. Block, C-G. Fiilthammar

引用次数: 0

Magnetic Tapering Of Intense E-beam, Long-pulse Gyro-bwos 强电子束、长脉冲陀螺的磁锥效应

Proceedings of 1994 IEEE 21st International Conference on Plasma Sciences (ICOPS) Pub Date : 1994-06-06 DOI: 10.1109/PLASMA.1994.589064

M. Walter, R. Gilgenbach, J. Hochman, T. Spencer

引用次数: 0

Two And Three Dimensional Simulation Of Disk-loaded Travelling-wave Output Structures For High-power Klystrons 大功率速调管盘载行波输出结构的二维和三维仿真

Proceedings of 1994 IEEE 21st International Conference on Plasma Sciences (ICOPS) Pub Date : 1994-06-06 DOI: 10.1109/PLASMA.1994.589146

K. Eppley

引用次数: 0