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New results in development of MW output power gyrotrons for fusion systems 用于核聚变系统的兆瓦级输出功率回旋管研制的新成果
Twenty Seventh International Conference on Infrared and Millimeter Waves Pub Date : 2002-12-16 DOI: 10.1109/ICIMW.2002.1076201
A. Litvak, M. Agapova, G. Denisov, V. Kurbatov, E. Tai, S. Malygin, V. Myasnikov, V. Ilyin, S. Usachev, V. Zapevalov
{"title":"New results in development of MW output power gyrotrons for fusion systems","authors":"A. Litvak, M. Agapova, G. Denisov, V. Kurbatov, E. Tai, S. Malygin, V. Myasnikov, V. Ilyin, S. Usachev, V. Zapevalov","doi":"10.1109/ICIMW.2002.1076201","DOIUrl":"https://doi.org/10.1109/ICIMW.2002.1076201","url":null,"abstract":"Gyrotrons are widely used in electron-cyclotron-wave systems of fusion installations. Modern and future installations require microwave sources with power of at least 1 MW. There are two main directions in the development of megawatt gyrotrons at IAP/GYCOM. The first line is an enhancement of parameters for conventional gyrotrons. The main efforts are applied now to implementing of CVD diamond windows into the gyrotrons and providing gyrotron operation in CW (or very long pulses of tens seconds) regime. The second direction aims at the development of frequency tunable megawatt gyrotrons.","PeriodicalId":23431,"journal":{"name":"Twenty Seventh International Conference on Infrared and Millimeter Waves","volume":"1 1","pages":"295-296"},"PeriodicalIF":0.0,"publicationDate":"2002-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84779048","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: 21
Application of photomixing of multimode LD light on THz spectroscopy 多模LD光混合在太赫兹光谱学中的应用
Twenty Seventh International Conference on Infrared and Millimeter Waves Pub Date : 2002-12-16 DOI: 10.1109/ICIMW.2002.1076178
O. Morikawa, M. Fujita, M. Hangyo
{"title":"Application of photomixing of multimode LD light on THz spectroscopy","authors":"O. Morikawa, M. Fujita, M. Hangyo","doi":"10.1109/ICIMW.2002.1076178","DOIUrl":"https://doi.org/10.1109/ICIMW.2002.1076178","url":null,"abstract":"A low-cost spectrometer can be constructed utilizing the intensity fluctuation in the CW multimode LD light. The frequency range of the light intensity fluctuation of the LD is limited by its spectral width. If a pair of light beams from two LDs with different center wavelengths is mixed, a higher frequency component appears. This method is applied to the low-cost spectrometer using the multimode LD.","PeriodicalId":23431,"journal":{"name":"Twenty Seventh International Conference on Infrared and Millimeter Waves","volume":"2004 1","pages":"249-250"},"PeriodicalIF":0.0,"publicationDate":"2002-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82974250","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
Application of frequency-tunable gyrotrons to ESR measurements 频率可调回旋管在ESR测量中的应用
Twenty Seventh International Conference on Infrared and Millimeter Waves Pub Date : 2002-12-16 DOI: 10.1109/ICIMW.2002.1076136
S. Mitsudo, I. Higuchi, I. Kalinichenko, T. Idehara, I. Ogawa
{"title":"Application of frequency-tunable gyrotrons to ESR measurements","authors":"S. Mitsudo, I. Higuchi, I. Kalinichenko, T. Idehara, I. Ogawa","doi":"10.1109/ICIMW.2002.1076136","DOIUrl":"https://doi.org/10.1109/ICIMW.2002.1076136","url":null,"abstract":"The Gyrotron FU series in Fukui University is being developed to provide a frequency-tunable source for far-infrared spectroscopy and plasma diagnostics. Submillimeter wave ESR spectrometer using gyrotrons as radiation sources and a pulse magnet for high field has been developed The ESR spectrometer has been successfully applied to several ESR measurements.","PeriodicalId":23431,"journal":{"name":"Twenty Seventh International Conference on Infrared and Millimeter Waves","volume":"15 1","pages":"165-166"},"PeriodicalIF":0.0,"publicationDate":"2002-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81938889","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 42 GHz, 200 kW second harmonic gyrotron 一个42 GHz, 200千瓦的二次谐波回旋管
Twenty Seventh International Conference on Infrared and Millimeter Waves Pub Date : 2002-12-16 DOI: 10.1109/ICIMW.2002.1076073
M. Kartikeyan, E. Borie, B. Piosczyk, M. Thumm
{"title":"A 42 GHz, 200 kW second harmonic gyrotron","authors":"M. Kartikeyan, E. Borie, B. Piosczyk, M. Thumm","doi":"10.1109/ICIMW.2002.1076073","DOIUrl":"https://doi.org/10.1109/ICIMW.2002.1076073","url":null,"abstract":"In this paper, the possibility of a 42 GHz, 200 kW CW gyrotron, operating in the TE/sub 4,2/ mode at the second cyclotron harmonic, is presented. The study includes a mode selection procedure followed by cavity and interaction computation for power and efficiency. This device will serve as a heating source for a small experimental steady state Tokamak which requires microwave power, preferably in the form of a Gaussian beam.","PeriodicalId":23431,"journal":{"name":"Twenty Seventh International Conference on Infrared and Millimeter Waves","volume":"5 1","pages":"39-40"},"PeriodicalIF":0.0,"publicationDate":"2002-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82464214","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
High quality operation of high frequency gyrotron 高质量的高频回旋管操作
Twenty Seventh International Conference on Infrared and Millimeter Waves Pub Date : 2002-12-16 DOI: 10.1109/ICIMW.2002.1076200
I. Ogawa, T. Idehara, Y. Iwata, R. Pavlichenko, S. Mitsudo, D. Wagner, M. Thumm
{"title":"High quality operation of high frequency gyrotron","authors":"I. Ogawa, T. Idehara, Y. Iwata, R. Pavlichenko, S. Mitsudo, D. Wagner, M. Thumm","doi":"10.1109/ICIMW.2002.1076200","DOIUrl":"https://doi.org/10.1109/ICIMW.2002.1076200","url":null,"abstract":"High frequency, medium power gyrotrons (Gyrotron FU series) have been developed at Fukui University as radiation sources covering a broad frequency band from millimeter to submillimeter wave region. Conversion from the gyrotron output of circular waveguide mode into a Gaussian-like beam is useful for applications of the gyrotron to a wide field. A high mode purity output is necessary for an effective conversion. In order to improve mode purity, a nonlinear cavity which is designed using a scattering matrix code and fabricated, is installed in the Gyrotron FU VA. The measurement of radiation patterns confirmed a high purity mode operation.","PeriodicalId":23431,"journal":{"name":"Twenty Seventh International Conference on Infrared and Millimeter Waves","volume":"72 1","pages":"293-294"},"PeriodicalIF":0.0,"publicationDate":"2002-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89411949","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: 14
Study of Ka-band components for a future high-gradient linear accelerator 未来高梯度直线加速器ka波段元件的研究
Twenty Seventh International Conference on Infrared and Millimeter Waves Pub Date : 2002-12-16 DOI: 10.1109/ICIMW.2002.1076206
G. Denisov, A. G. Litavk, M. I. Petelin, A. Vikharev, S. Kuzikov, A. Gorbachev, V. Paveliev, A. Bogdashov, M. Y. Shmelev, J. Hirshfield
{"title":"Study of Ka-band components for a future high-gradient linear accelerator","authors":"G. Denisov, A. G. Litavk, M. I. Petelin, A. Vikharev, S. Kuzikov, A. Gorbachev, V. Paveliev, A. Bogdashov, M. Y. Shmelev, J. Hirshfield","doi":"10.1109/ICIMW.2002.1076206","DOIUrl":"https://doi.org/10.1109/ICIMW.2002.1076206","url":null,"abstract":"Efforts are underway within the accelerator community to develop high-gradient RF accelerators using microwave sources at relatively high frequencies (in particular, at 34.272 GHz). Yet no corresponding high-power components providing pulse compression, transmission and input coupling to the accelerating structure are currently available. Results of investigations of many components including resonator passive pulse compressor, controllable launcher for a DLDS system, low-loss miter bends, and mode converters, are presented.","PeriodicalId":23431,"journal":{"name":"Twenty Seventh International Conference on Infrared and Millimeter Waves","volume":"2 1","pages":"305-306"},"PeriodicalIF":0.0,"publicationDate":"2002-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83672421","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: 5
Radiation of a sea background in IR range 海洋背景在红外波段的辐射
Twenty Seventh International Conference on Infrared and Millimeter Waves Pub Date : 2002-12-16 DOI: 10.1109/ICIMW.2002.1076096
J.I. Belousov, D. Ivanov, A. Utenkov
{"title":"Radiation of a sea background in IR range","authors":"J.I. Belousov, D. Ivanov, A. Utenkov","doi":"10.1109/ICIMW.2002.1076096","DOIUrl":"https://doi.org/10.1109/ICIMW.2002.1076096","url":null,"abstract":"The rough marine surface acts as an independent object for hydrophysical investigation and as a background, on which natural formations and artificial objects are observed. We have elaborated techniques of calculation and have compared the results of calculation from accumulated experimental data. It has allowed us to calculate the characteristics of the IR radiation of the sea and sky near to the sea horizon in the range 3-14 microns.","PeriodicalId":23431,"journal":{"name":"Twenty Seventh International Conference on Infrared and Millimeter Waves","volume":"55 1","pages":"85-86"},"PeriodicalIF":0.0,"publicationDate":"2002-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77204982","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
Progress of the 1 MW, 140 GHz, CW gyrotron for W7-X 用于W7-X的1mw、140 GHz连续波回旋管的进展
Twenty Seventh International Conference on Infrared and Millimeter Waves Pub Date : 2002-12-16 DOI: 10.1109/ICIMW.2002.1076055
G. Dammertz, S. Alberti, A. Arnold, E. Borie, V. Erckmann, G. Gantenbein, E. Giguet, R. Heidinger, J. Hogge, S. Illy, W. Kasparek, K. Koppenburg, M. Kuntze, H. Laqua, G. LeCloarec, F. Legrand, W. Leonhardt, C. Liévin, R. Magne, G. Michel, G. Muller, G. Neffe, B. Piosczyk, M. Schmid, K. Schwoerer, M. Thumm, M. Tran
{"title":"Progress of the 1 MW, 140 GHz, CW gyrotron for W7-X","authors":"G. Dammertz, S. Alberti, A. Arnold, E. Borie, V. Erckmann, G. Gantenbein, E. Giguet, R. Heidinger, J. Hogge, S. Illy, W. Kasparek, K. Koppenburg, M. Kuntze, H. Laqua, G. LeCloarec, F. Legrand, W. Leonhardt, C. Liévin, R. Magne, G. Michel, G. Muller, G. Neffe, B. Piosczyk, M. Schmid, K. Schwoerer, M. Thumm, M. Tran","doi":"10.1109/ICIMW.2002.1076055","DOIUrl":"https://doi.org/10.1109/ICIMW.2002.1076055","url":null,"abstract":"The development of high power gyrotrons in continuous wave operation for heating of plasmas used in nuclear fusion research has been in progress for several years in a collaboration between different European research institutes and industrial partners. The 140 GHz gyrotron is designed for an output power of 1 MW in continuous wave operation and is operated in the TE/sub 28,8/ mode. The first tube \"Maquette\" was tested at the Forschungszentrum Karlsruhe. Long pulse operation of the gyrotron was possible but it was limited by the behaviour of the RF-load and by the pressure increase inside the tube. Modulation experiments with an amplitude between 0.1-0.8 kW were performed up to a modulation frequency of 50 kHz sinusoidally. A visual inspection of the tube showed some melted spots in the mirror box. An improved tube (Prototype 1) with better cooling and an additional relief window at the mirror box has been built and tested. Without optimisation of the parameters in short and long pulse operation, an output power of 0.85 kW could be achieved with a pulse length of 180 s and 0.97 kW for 12 s with an efficiency of 44% (depression voltage: 26 kV). Even for long pulse operation, the pressure increase inside the tube was moderate. The limitations were caused by mode-loss and/or by increased cathode current connected with parasitic oscillations.","PeriodicalId":23431,"journal":{"name":"Twenty Seventh International Conference on Infrared and Millimeter Waves","volume":"52 1","pages":"3-4"},"PeriodicalIF":0.0,"publicationDate":"2002-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75184252","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: 10
Theoretical study of a microwave system for the plasma microwave excited excimer laser 等离子体微波激发准分子激光微波系统的理论研究
Twenty Seventh International Conference on Infrared and Millimeter Waves Pub Date : 2002-12-16 DOI: 10.1109/ICIMW.2002.1076090
L. Shenggang, D. C. Huong, Zhu Da-jun, Liu Chengyue, D. Manos
{"title":"Theoretical study of a microwave system for the plasma microwave excited excimer laser","authors":"L. Shenggang, D. C. Huong, Zhu Da-jun, Liu Chengyue, D. Manos","doi":"10.1109/ICIMW.2002.1076090","DOIUrl":"https://doi.org/10.1109/ICIMW.2002.1076090","url":null,"abstract":"The plasma microwave excited excimer laser is one of the most attractive topics in science and technology. This kind of excimer laser has many advantages, such as very simple construction, low cost, ease of use, etc. There are some different structures of this laser. One of the simplest structures is shown here: a rectangular waveguide with a circular cylindrical dielectric tube located in the center of the waveguide, where the dielectric tube is filled with an appropriate gas. If the wave power is high enough, a plasma may be produced, which is either free or magnetized plasma depending on the presence of an external magnetic field. Higher microwave power will then excite the excimer laser. A theoretical study of the microwave system is given in the paper. The dispersion equations of this system for both the free and magnetized plasma filling have been derived. The numerical calculations are continuing.","PeriodicalId":23431,"journal":{"name":"Twenty Seventh International Conference on Infrared and Millimeter Waves","volume":"6 1","pages":"73-74"},"PeriodicalIF":0.0,"publicationDate":"2002-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78664550","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
High power broadband W-band gyrotron traveling wave amplifier 大功率宽带w波段回旋管行波放大器
Twenty Seventh International Conference on Infrared and Millimeter Waves Pub Date : 2002-12-16 DOI: 10.1109/ICIMW.2002.1076154
D. Mcdermott, H.H. Song, L. Barnett, Y. Hirata, A. T. Lin, H. Hsu, P. Marandos, J.S. Lee, T. Chang, K. Chu, N. Luhmann
{"title":"High power broadband W-band gyrotron traveling wave amplifier","authors":"D. Mcdermott, H.H. Song, L. Barnett, Y. Hirata, A. T. Lin, H. Hsu, P. Marandos, J.S. Lee, T. Chang, K. Chu, N. Luhmann","doi":"10.1109/ICIMW.2002.1076154","DOIUrl":"https://doi.org/10.1109/ICIMW.2002.1076154","url":null,"abstract":"Early results are presented for a high power gyro-TWT operating in the low-loss TE/sub 01/ mode that is driven by a 100 V, 5 A, ν/sub ⊥//ν/sub z/ = 1.0 MIG electron beam and is predicted by a large-signal simulation code to generate 140 kW at 94 GHz with 28% efficiency, 50 dB saturated gain and 5% bandwidth.","PeriodicalId":23431,"journal":{"name":"Twenty Seventh International Conference on Infrared and Millimeter Waves","volume":"1 1","pages":"201-202"},"PeriodicalIF":0.0,"publicationDate":"2002-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78680167","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
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