Third IEEE International Vacuum Electronics Conference (IEEE Cat. No.02EX524)最新文献

Study of axial modes in the gyrotron backward-wave oscillator 回旋管后向波振荡器轴向模式的研究

Third IEEE International Vacuum Electronics Conference (IEEE Cat. No.02EX524) Pub Date : 2002-12-16 DOI: 10.1109/IVELEC.2002.999293

T. Chang, K. Pao, C. Fan, S. Chen, K. Chu

{"title":"Study of axial modes in the gyrotron backward-wave oscillator","authors":"T. Chang, K. Pao, C. Fan, S. Chen, K. Chu","doi":"10.1109/IVELEC.2002.999293","DOIUrl":"https://doi.org/10.1109/IVELEC.2002.999293","url":null,"abstract":"In a resonator structure, the axial field profile of a cold mode results from constructive superposition of reflected waves at both ends. For the gyromonotron oscillator, end reflections also constitute the feedback loop during the field build-up. The hot mode has essentially the same field profile and oscillation frequency as those of the cold mode. The gyrotron backward-wave oscillator (gyro-BWO), on the other hand, employs a waveguide structure in which no cold resonant modes exist. In addition, the feedback loop consists of the forward moving beam and the backward propagating wave. End reflections in principle play no role in forming the gyro-BWO field. The field pattern of the oscillating mode must then depend entirely on the beam-wave interaction. Field forming processes as well as the resultant axial field profile in the gyro-BWO are thus expected to be fundamentally different from those of the gyromonotron. Indeed, a recent study has shown that the field in the gyro-BWO contracts nonlinearly as the beam current builds up. Here, we examine the mechanisms for the formation of the axial modes in the gyro-BWO in the linear regime.","PeriodicalId":344852,"journal":{"name":"Third IEEE International Vacuum Electronics Conference (IEEE Cat. No.02EX524)","volume":"47 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121069495","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: 2

An electron gun for a sheet beam klystron 电子枪用于板束速调管

Third IEEE International Vacuum Electronics Conference (IEEE Cat. No.02EX524) Pub Date : 2002-12-16 DOI: 10.1109/ICIMW.2002.1076125

M. Read, G. Miram, R. Ives, V. Ivanov, A. Krasnykh

{"title":"An electron gun for a sheet beam klystron","authors":"M. Read, G. Miram, R. Ives, V. Ivanov, A. Krasnykh","doi":"10.1109/ICIMW.2002.1076125","DOIUrl":"https://doi.org/10.1109/ICIMW.2002.1076125","url":null,"abstract":"Calabazas Creek Research, Inc. is developing rectangular, gridded, thermionic, dispenser-cathode gun for sheet beam devices. The first application is expected to be klystrons for use in advanced particle accelerators and colliders. The current generation of accelerators typically use klystrons with a cylindrical beam generated by a Pierce-type electron gun. As RF power is pushed to higher levels, space charge forces in the electron beam limit the amount of current that can be transmitted at a given voltage. The options are to increase the beam voltage leading to problems with X-ray shielding and modulator and power supply design, or to develop new techniques for lowering the space charge forces in the electron beam. The current program addresses issues related to beam formation at the emitter surface, design and implementation of shadow and control grids in a rectangular geometry, and is directed toward a robust, cost-effective, and reliable mechanical design. A prototype device will be developed that will operate at 415 kV, 250 A and be designed for an 80 MW, X-Band, sheet-beam klystron. The cathode will have 100 cm/sup 2/ of cathode area with an average cathode current loading of 2.5 A/cm/sup 2/. For short pulse formation, the use of a grid was chosen. We will report the electrostatic and beam optics design in both 2- and 3-D as well as a thermal-mechanical analysis of the cathode region.","PeriodicalId":344852,"journal":{"name":"Third IEEE International Vacuum Electronics Conference (IEEE Cat. No.02EX524)","volume":"86 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124230385","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

A novel wide-band high-transmission window for high-frequency microwave tubes 一种用于高频微波管的新型宽带高传输窗口

Third IEEE International Vacuum Electronics Conference (IEEE Cat. No.02EX524) Pub Date : 2002-08-07 DOI: 10.1109/IVELEC.2002.999345

Ming-Chieh Lin, D. Chuu

引用次数: 2

Mass production of magnetron for microwave oven 微波炉用磁控管的量产

Third IEEE International Vacuum Electronics Conference (IEEE Cat. No.02EX524) Pub Date : 2002-08-07 DOI: 10.1109/IVELEC.2002.999232

K. Chang, Duk-Kun Suh, Chun-Bae Lee, Won-Woo Eom, Jea-Jin Cha, Dang-Won Kim, H. Ha

引用次数: 1

Integrated cathode testing 集成阴极测试

Third IEEE International Vacuum Electronics Conference (IEEE Cat. No.02EX524) Pub Date : 2002-08-07 DOI: 10.1109/IVELEC.2002.999390

R. Longo, W. Tighe, C. Harrison

引用次数: 1

Orotron with magnetic nonuniformity - advanced millimeter waves source 具有磁不均匀性的Orotron -先进的毫米波源

Third IEEE International Vacuum Electronics Conference (IEEE Cat. No.02EX524) Pub Date : 2002-08-07 DOI: 10.1109/IVELEC.2002.999260

E. Odarenko, A. Shmat’ko, A. Tsvyk

引用次数: 0

Design of W-band coupled-cavity TWT by LIGA fabrication 用LIGA法设计w波段耦合腔行波管

Third IEEE International Vacuum Electronics Conference (IEEE Cat. No.02EX524) Pub Date : 2002-08-07 DOI: 10.1109/IVELEC.2002.999255

Y. Shin, G. Park, S.T. Han, J.I. Kim, G. Scheitrum, B. Arfin, S.S. Chang

引用次数: 2

High power Cusp guns 大功率尖端枪

Third IEEE International Vacuum Electronics Conference (IEEE Cat. No.02EX524) Pub Date : 2002-08-07 DOI: 10.1109/IVELEC.2002.999374

D. Gallagher, P. Frawley, K. Kreischer, V. Heinen

引用次数: 0

Novel concepts of vacuum microelectronic microwave devices with field emitter cathode arrays 具有场发射极阵列的真空微电子微波器件的新概念

Third IEEE International Vacuum Electronics Conference (IEEE Cat. No.02EX524) Pub Date : 2002-08-07 DOI: 10.1109/IVELEC.2002.999265

A. G. Rozhnev, N. Ryskin, D. V. Sokolov, D. Trubetskov, S.T. Han, J.I. Kim, G. Park

引用次数: 20

Design optimisation of multistage depressed collectors for high efficiency travelling wave tubes using genetic algorithm 基于遗传算法的高效行波管多级压抑集热器设计优化

Third IEEE International Vacuum Electronics Conference (IEEE Cat. No.02EX524) Pub Date : 2002-08-07 DOI: 10.1109/IVELEC.2002.999313

T. Ghosh, R. Carter

引用次数: 6