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ECE diagnosis of tokamak edge temperature 托卡马克边缘温度的ECE诊断
1983 Eighth International Conference on Infrared and Millimeter Waves Pub Date : 1983-12-01 DOI: 10.1109/irmm.1983.9126337
F. Blau
{"title":"ECE diagnosis of tokamak edge temperature","authors":"F. Blau","doi":"10.1109/irmm.1983.9126337","DOIUrl":"https://doi.org/10.1109/irmm.1983.9126337","url":null,"abstract":"ECE is well established as a diagnostic for tokamak core temperature. We present an evaluation of the extension of standard techniques to the low-temperature, low-density. edge plasma. Included are the effects of optical depth, harmonic overlap, and spatial resolution.","PeriodicalId":314918,"journal":{"name":"1983 Eighth International Conference on Infrared and Millimeter Waves","volume":"64 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1983-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129657048","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
Single-mode efficiency in free-electron lasers 自由电子激光器的单模效率
1983 Eighth International Conference on Infrared and Millimeter Waves Pub Date : 1983-12-01 DOI: 10.1109/irmm.1983.9126507
J. Soln
{"title":"Single-mode efficiency in free-electron lasers","authors":"J. Soln","doi":"10.1109/irmm.1983.9126507","DOIUrl":"https://doi.org/10.1109/irmm.1983.9126507","url":null,"abstract":"For free-electron laser (FEL) devices with dilute and cold electron beams, an expression for the single-mode efficiency, ∊, is defined. The connection with the full (quantum mechanical) gain, G, is such that ∊/G is equal to the ratio of the total photon energy to the kinetic electron-beam energy “trapped” in the interaction volume V. Both ∊ and G are discussed quantitatively, using the example of a quantum model of the Smith-Purcell FEL: it is shown that unlike G, ∊ depends on the total photon energy trapped in V even in the classical regime.","PeriodicalId":314918,"journal":{"name":"1983 Eighth International Conference on Infrared and Millimeter Waves","volume":"65 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1983-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130342951","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
Theory of a harmonic gyrotron in a rectangular cavity using a ribbon type electrons 矩形腔中使用带型电子的谐波回旋管理论
1983 Eighth International Conference on Infrared and Millimeter Waves Pub Date : 1983-12-01 DOI: 10.1109/irmm.1983.9126483
A. Ferendeci, C. Han
{"title":"Theory of a harmonic gyrotron in a rectangular cavity using a ribbon type electrons","authors":"A. Ferendeci, C. Han","doi":"10.1109/irmm.1983.9126483","DOIUrl":"https://doi.org/10.1109/irmm.1983.9126483","url":null,"abstract":"Small signal theory of a harmonic gyrotron operating in an axially grooved rectangular waveguide using a ribbon type electron beam will be presented. Mode selection and efficiency scaling as a function of harmonic number will be discussed.","PeriodicalId":314918,"journal":{"name":"1983 Eighth International Conference on Infrared and Millimeter Waves","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1983-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121487286","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
Enhancement of high-harmdnic gyrotron gain by a dielectric rod 介质棒对高谐波回旋管增益的增强
1983 Eighth International Conference on Infrared and Millimeter Waves Pub Date : 1983-12-01 DOI: 10.1109/irmm.1983.9126485
D. Mcdermott, D. S. Furuno, N. Luhmann
{"title":"Enhancement of high-harmdnic gyrotron gain by a dielectric rod","authors":"D. Mcdermott, D. S. Furuno, N. Luhmann","doi":"10.1109/irmm.1983.9126485","DOIUrl":"https://doi.org/10.1109/irmm.1983.9126485","url":null,"abstract":"A dielectric rod is shown to reduce the energy requirements of the electron beam for high-harmonic gyrotron operation. A large interaction filling factor can occur for moderate-energy electrons (∼ 80 keV) spiralling around the rod within the evanescent region of a dielectric waveguide mode. Since the magnetic field strength is reduced by an order of magnitude in an interaction at the tenth harmonic of the cyclotron frequency, a submillimeter-wave gyrotron is now truly feasible because the acceleration voltages can be conveniently produced by DC power supplies.","PeriodicalId":314918,"journal":{"name":"1983 Eighth International Conference on Infrared and Millimeter Waves","volume":"200 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1983-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121533588","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
Multimode phenomena in optically-pumped lasers 光抽运激光器中的多模现象
1983 Eighth International Conference on Infrared and Millimeter Waves Pub Date : 1983-12-01 DOI: 10.1109/IRMM.1983.9126492
M. Dupertuis, R. Salomaa, M. Siegrist
{"title":"Multimode phenomena in optically-pumped lasers","authors":"M. Dupertuis, R. Salomaa, M. Siegrist","doi":"10.1109/IRMM.1983.9126492","DOIUrl":"https://doi.org/10.1109/IRMM.1983.9126492","url":null,"abstract":"Multimode phenomena in optically-pumped lasers are studied by means of Lamb's semi-classical theory. Specifically we investigate competition between Raman and line center oscillation in off-resonantly pumped FIR lasers. The observed preference of the Raman line is shown to be the result of an inversion of the line center gain for a moderate to high intensity Raman mode.","PeriodicalId":314918,"journal":{"name":"1983 Eighth International Conference on Infrared and Millimeter Waves","volume":"75 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1983-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114850569","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
Microturbulence studies on text 文本微湍流研究
1983 Eighth International Conference on Infrared and Millimeter Waves Pub Date : 1983-12-01 DOI: 10.1109/irmm.1983.9126398
W. Peebles, D. Brower, N. Luhmann, R. Savage
{"title":"Microturbulence studies on text","authors":"W. Peebles, D. Brower, N. Luhmann, R. Savage","doi":"10.1109/irmm.1983.9126398","DOIUrl":"https://doi.org/10.1109/irmm.1983.9126398","url":null,"abstract":"A multichannel far-infrared (FIR) scattering system has been installed on the TEXT device utilizing both heterodyne and homodyne detection techniques. The system has allowed the power spectra of microturbulence to be measured on a single tokamak discharge. The results confirm many of the characteristics observed in a number of previous experiments [1,2,3]. However, significant new results are presented for a variety of plasma conditions, thereby expanding our knowledge of transport phenomena in fusion plasmas.","PeriodicalId":314918,"journal":{"name":"1983 Eighth International Conference on Infrared and Millimeter Waves","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1983-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127559266","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
New results on tapered slot endfire antennas on dielectric substsates 介电基材上锥形槽端火天线的新结果
1983 Eighth International Conference on Infrared and Millimeter Waves Pub Date : 1983-12-01 DOI: 10.1109/IRMM.1983.9126539
E. Kollberg, J. Johansson, T. Thungren, T. L. Korzeniowski, K. Yngvesson
{"title":"New results on tapered slot endfire antennas on dielectric substsates","authors":"E. Kollberg, J. Johansson, T. Thungren, T. L. Korzeniowski, K. Yngvesson","doi":"10.1109/IRMM.1983.9126539","DOIUrl":"https://doi.org/10.1109/IRMM.1983.9126539","url":null,"abstract":"Tapered slot endfire antennas for millimeter wave single beam and imaging applications have been investigated systematically. Gain, beamwidth, efficiency, coupling impedance and bandwidth have been determined experimentally for various shapes, such as linearly tapered (LISA), exponentially tapered (Vivaldi) and constant width (CWSA). Substrates of both high and low dielectric constants have been included. This class of antenna elements appears very attractive for a number of applications, and is easy to fabricate.","PeriodicalId":314918,"journal":{"name":"1983 Eighth International Conference on Infrared and Millimeter Waves","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1983-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126434228","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: 7
Surface current analysis of a corner cube mixer 角立方混合器的表面电流分析
1983 Eighth International Conference on Infrared and Millimeter Waves Pub Date : 1983-12-01 DOI: 10.1109/irmm.1983.9126437
H. Pickett, T. L. Boyd
{"title":"Surface current analysis of a corner cube mixer","authors":"H. Pickett, T. L. Boyd","doi":"10.1109/irmm.1983.9126437","DOIUrl":"https://doi.org/10.1109/irmm.1983.9126437","url":null,"abstract":"The surface current is described for a long wire antenna located in a corner cube. The ground plane perpendicular to the wire is found to be unimportant to the operation of the antenna. Detailed calculations are made for the roof-top reflector configuration which show the importance of obstructions near the apex of the reflector.","PeriodicalId":314918,"journal":{"name":"1983 Eighth International Conference on Infrared and Millimeter Waves","volume":"114 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1983-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128121982","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
Submillimeter mixing with Hg1-xCdxTe 亚毫米混合Hg1-xCdxTe
1983 Eighth International Conference on Infrared and Millimeter Waves Pub Date : 1983-12-01 DOI: 10.1109/irmm.1983.9126450
G. C. Lopez, H. Röser, M. Kimmitt, J. Giles
{"title":"Submillimeter mixing with Hg1-xCdxTe","authors":"G. C. Lopez, H. Röser, M. Kimmitt, J. Giles","doi":"10.1109/irmm.1983.9126450","DOIUrl":"https://doi.org/10.1109/irmm.1983.9126450","url":null,"abstract":"Mixing with Hg1-xCdxTe at submillimeter wavelengths is reported. It is shown that optimum performance depends critically on the x value chosen and the operating temperature. Bandwidths of more than 50 MHz have been obtained with x = 0.44 and temperature 3.2K.","PeriodicalId":314918,"journal":{"name":"1983 Eighth International Conference on Infrared and Millimeter Waves","volume":"122 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1983-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115790003","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
Field attenuation measurements at 0.89 mm 场衰减测量值为0.89 mm
1983 Eighth International Conference on Infrared and Millimeter Waves Pub Date : 1983-12-01 DOI: 10.1109/irmm.1983.9126522
A. Gasiewski, F. Merat
{"title":"Field attenuation measurements at 0.89 mm","authors":"A. Gasiewski, F. Merat","doi":"10.1109/irmm.1983.9126522","DOIUrl":"https://doi.org/10.1109/irmm.1983.9126522","url":null,"abstract":"Field measurements of clear atmosphere attenuation have been made at a wavelenght of 0.89 mm, using an optically pumped far infrared laser as a source. Absolute measurements of attenuation idicated 4 to ]4 8B/km above values calculated by absorption line compilations. Attenuation sensitivity measurements yielded values 1.5 to 2.0 times greater that the slopes predicted by monomer theory. Reasonable agreement is obtained with previously measured data by Tanton and by Ryadov and Furashov.","PeriodicalId":314918,"journal":{"name":"1983 Eighth International Conference on Infrared and Millimeter Waves","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1983-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132407921","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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