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1983 Eighth International Conference on Infrared and Millimeter Waves最新文献

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Slotted gyrotron cavities 开槽回旋管腔
1983 Eighth International Conference on Infrared and Millimeter Waves Pub Date : 1983-12-01 DOI: 10.1109/irmm.1983.9126504
K. Busby, A. Fliflet, M. Read
{"title":"Slotted gyrotron cavities","authors":"K. Busby, A. Fliflet, M. Read","doi":"10.1109/irmm.1983.9126504","DOIUrl":"https://doi.org/10.1109/irmm.1983.9126504","url":null,"abstract":"Computer simulations predict that narrow, longitudinal slots in the walls of a gyrotron cavity tend not to affect modes such as the TE1,5 while lowering the Q factor of competing modes. Available experimental data' from cold test cavities will be presented.","PeriodicalId":314918,"journal":{"name":"1983 Eighth International Conference on Infrared and Millimeter Waves","volume":"197 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":"116403215","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
Analysis of a forward injection wideband traveling wave amplifier 前向注入宽带行波放大器的分析
1983 Eighth International Conference on Infrared and Millimeter Waves Pub Date : 1983-12-01 DOI: 10.1109/irmm.1983.9126466
D. Dialetis, L. Barnett, K. Chu
{"title":"Analysis of a forward injection wideband traveling wave amplifier","authors":"D. Dialetis, L. Barnett, K. Chu","doi":"10.1109/irmm.1983.9126466","DOIUrl":"https://doi.org/10.1109/irmm.1983.9126466","url":null,"abstract":"Theoretical results will be presented for a wideband forward injection gyrotron traveling wave amplifier. The wideband frequency spectrum is obtained by employing a weakly tapered external magnetic field which is set above exact grazing. Operation at such magnetic fields has been demonstrated by initial experimental observations. It will be shown that, in spite of a large launching loss over the whole frequency region, it is possible to obtain significant gain over a broad bandwidth. Also, it will be shown that the absolute instability, that usually occurs in the gyrotron traveling wave amplifier, can be avoided by operating at a high beam voltage. Finally, results on the effect of temperature on the performance of the device will be presented.","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":"126189087","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 pulsed operation of the NH3 laser on transitions between 100 and 300μm NH3激光器在100 ~ 300μm跃迁范围内的高功率脉冲工作
1983 Eighth International Conference on Infrared and Millimeter Waves Pub Date : 1983-12-01 DOI: 10.1109/irmm.1983.9126468
J. Machuzak, P. Woskoboinikow, W. Mulligan
{"title":"High-power pulsed operation of the NH3 laser on transitions between 100 and 300μm","authors":"J. Machuzak, P. Woskoboinikow, W. Mulligan","doi":"10.1109/irmm.1983.9126468","DOIUrl":"https://doi.org/10.1109/irmm.1983.9126468","url":null,"abstract":"An NH<inf>3</inf> laser pumped by a single mode, etalontuned TEA CO<inf>2</inf> laser was optimized for operation on the 257 and 281μm transitions at power levels of 430 and 160 kW in 0.8μs pulses, respectively. Also, we report the first observation of 140 GHz laser action in NH<inf>3</inf> at power levels up to 8 kW.","PeriodicalId":314918,"journal":{"name":"1983 Eighth International Conference on Infrared and Millimeter Waves","volume":"87 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":"124286166","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
Minimization of noise temperature for the hot-electron mixer 热电子混频器噪声温度的最小化
1983 Eighth International Conference on Infrared and Millimeter Waves Pub Date : 1983-12-01 DOI: 10.1109/irmm.1983.9126438
H. Newman, W. J. Moore, D. Webb
{"title":"Minimization of noise temperature for the hot-electron mixer","authors":"H. Newman, W. J. Moore, D. Webb","doi":"10.1109/irmm.1983.9126438","DOIUrl":"https://doi.org/10.1109/irmm.1983.9126438","url":null,"abstract":"The principal factors which limit the bandwidth and noise temperature of a hot-electron mixer have been calculated. The minimum mixer contribution to the effective noise temperature is found to be 33 TLattice. under matched conditions, in good agreement with previously published experiments.","PeriodicalId":314918,"journal":{"name":"1983 Eighth International Conference on Infrared and Millimeter Waves","volume":"121 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":"124508766","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
Dielectric filters for short millimetre wave integrated circuits 短毫米波集成电路用介电滤波器
1983 Eighth International Conference on Infrared and Millimeter Waves Pub Date : 1983-12-01 DOI: 10.1109/IRMM.1983.9126499
G. Morgan
{"title":"Dielectric filters for short millimetre wave integrated circuits","authors":"G. Morgan","doi":"10.1109/IRMM.1983.9126499","DOIUrl":"https://doi.org/10.1109/IRMM.1983.9126499","url":null,"abstract":"Characteristics are presented for narrow. band pass (∼3%) filters designed with temperature compensated high permittivity dielectrics (barium nonatitanate). At W band both duroid and Z cut quartz microstrip substrates have been investigated and the insertion losses due to the various coupling fields are estimated to be ∼ 2 dB for 2 resonator filters and ∼ 3.5 dB for 3 resonator filters.","PeriodicalId":314918,"journal":{"name":"1983 Eighth International Conference on Infrared and Millimeter Waves","volume":"21 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":"122125366","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 140/220GHz radiometer for airborne imaging 用于机载成像的140/220GHz辐射计
1983 Eighth International Conference on Infrared and Millimeter Waves Pub Date : 1983-12-01 DOI: 10.1109/IRMM.1983.9126394
R. E. Forsythe
{"title":"A 140/220GHz radiometer for airborne imaging","authors":"R. E. Forsythe","doi":"10.1109/IRMM.1983.9126394","DOIUrl":"https://doi.org/10.1109/IRMM.1983.9126394","url":null,"abstract":"A dual frequency (140/220 GHz) radiometer has been designed, developed, and delivered to the Naval Research Laboratory. This instrument has been used to obtain the first airborne, high resolution, low noise, passive imagery at these frequencies. It features all solid state receiver components, remote switching/operation, dual IF channels, a 220 GHz subharmonic mixer, and quasi-optical RF diplexing.","PeriodicalId":314918,"journal":{"name":"1983 Eighth International Conference on Infrared and Millimeter Waves","volume":"14 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":"116553883","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
Generation of high frequency radiation by quasi-optical gyrotron at harmonics of the cyclotron frequency 准光回旋管在回旋频率谐波处产生高频辐射
1983 Eighth International Conference on Infrared and Millimeter Waves Pub Date : 1983-12-01 DOI: 10.1109/irmm.1983.9126503
B. Levush, W. Manheimer
{"title":"Generation of high frequency radiation by quasi-optical gyrotron at harmonics of the cyclotron frequency","authors":"B. Levush, W. Manheimer","doi":"10.1109/irmm.1983.9126503","DOIUrl":"https://doi.org/10.1109/irmm.1983.9126503","url":null,"abstract":"A quasi-optical cavity is designed for harmonic operation of gyrotrons. Lower harmonics are suppressed by exploiting their larger diffraction losses, and the field amplitude is kept below the breakdown value by taking advantage of the focusing properties of the radiation in the resonator.","PeriodicalId":314918,"journal":{"name":"1983 Eighth International Conference on Infrared and Millimeter Waves","volume":"10 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":"114939832","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 detection with Hg1-xCdxTe Hg1-xCdxTe亚毫米探测
1983 Eighth International Conference on Infrared and Millimeter Waves Pub Date : 1983-12-01 DOI: 10.1109/irmm.1983.9126404
J. Giles, M. Kimmitt, G. C. Lopez, H. Röser
{"title":"Submillimeter detection with Hg1-xCdxTe","authors":"J. Giles, M. Kimmitt, G. C. Lopez, H. Röser","doi":"10.1109/irmm.1983.9126404","DOIUrl":"https://doi.org/10.1109/irmm.1983.9126404","url":null,"abstract":"In recent papers [1] and [2] Weber and Kulpa have reported on the usefulness of the alloy semiconductor Hg1-xCdxTe as a long wavelength electron bolometer detector. Although our main interest is in the use of this semiconductor as a mixer for far infrared heterodyne experiments [3], we have inevitably also studied its wider response. Although this research is at a fairly early stage, and some of the results are not easy to interpret, our best detector has a good detectivity (NEP < 1 × 10−11 WHz−½ at 500 μm and < 5 × 10−12 WHz−½ at 900 μm), with a significantly faster response than n-InSb. Moreover, construction of the detector is very simple compared with n-InSb where considerable ingenuity is required to make high impedance, high voltage responsivity detectors without employing magnetic fields.","PeriodicalId":314918,"journal":{"name":"1983 Eighth International Conference on Infrared and Millimeter Waves","volume":"22 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":"125587796","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
EPR IN TmVO4 using an optically pumped fir laser 使用光泵浦冷杉激光器的TmVO4中的EPR
1983 Eighth International Conference on Infrared and Millimeter Waves Pub Date : 1983-12-01 DOI: 10.1109/irmm.1983.9126517
P. Janssen
{"title":"EPR IN TmVO4 using an optically pumped fir laser","authors":"P. Janssen","doi":"10.1109/irmm.1983.9126517","DOIUrl":"https://doi.org/10.1109/irmm.1983.9126517","url":null,"abstract":"To determine the g-value of the doublet ground state of the Tm3+ ion in TmVO4, problems arise due to unknown local fields. Using FIR wavelengths these difficulties can be overcome. However, several unexplained resonances with different g-values were observed.","PeriodicalId":314918,"journal":{"name":"1983 Eighth International Conference on Infrared and Millimeter Waves","volume":"201 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":"123966007","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
ECE experiments on Heliotron E device Heliotron E装置的ECE实验
1983 Eighth International Conference on Infrared and Millimeter Waves Pub Date : 1983-12-01 DOI: 10.1109/irmm.1983.9126341
Motoyasu Sato
{"title":"ECE experiments on Heliotron E device","authors":"Motoyasu Sato","doi":"10.1109/irmm.1983.9126341","DOIUrl":"https://doi.org/10.1109/irmm.1983.9126341","url":null,"abstract":"Electron cyclotron heating experiments have been perfomed in Heliotron E device to produce and heat the high temperature plasma. Varian VGE 8G50 Gyratrons provide 300–400 kw, 53.2 GKz microwave to the vacuum chamber. The typical plasma parameters obtained are Tc =1.5 keV, ne = 1–3 × 10 cm−3. The heating rates are 6–10 eV/kw and 6–8 J/kw. These values are 1–2 times larger than that of tokamaks.","PeriodicalId":314918,"journal":{"name":"1983 Eighth International Conference on Infrared and Millimeter Waves","volume":"62 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":"129932151","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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