Pub Date : 1983-12-01DOI: 10.1109/IRMM.1983.9126489
S. Kon, T. Kachi
Assignments of FIR laser lines in optically pumped CD3OH are described. Fermi resonance will occur in energy levels between n=0, τ=1, K=1 torsional levels of vibrational state and n=3,4 τ=1, K=1 levels of ground state. Discrepancy between the expected transition and the pump CO2 laser frequencies of 10R(18) and 10R(8) is corrected by the introduction of the Fermi resonance. The calculated wavenumber of expected transition pumped by 10R(36) also is corrected with Fermi resonance in τ=3 K=9 torsional levels more accurately.
{"title":"Analysis of optically pumped CD3OH laser lines","authors":"S. Kon, T. Kachi","doi":"10.1109/IRMM.1983.9126489","DOIUrl":"https://doi.org/10.1109/IRMM.1983.9126489","url":null,"abstract":"Assignments of FIR laser lines in optically pumped CD3OH are described. Fermi resonance will occur in energy levels between n=0, τ=1, K=1 torsional levels of vibrational state and n=3,4 τ=1, K=1 levels of ground state. Discrepancy between the expected transition and the pump CO2 laser frequencies of 10R(18) and 10R(8) is corrected by the introduction of the Fermi resonance. The calculated wavenumber of expected transition pumped by 10R(36) also is corrected with Fermi resonance in τ=3 K=9 torsional levels more accurately.","PeriodicalId":314918,"journal":{"name":"1983 Eighth International Conference on Infrared and Millimeter Waves","volume":"9 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":"115466304","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}
Pub Date : 1983-12-01DOI: 10.1109/irmm.1983.9126458
V. Miteva, K. Ivanov
An analytical technique is developed and applied to calculate and interpret the nonreciprocal transmission characteristics of a circular guide, containing passive semiconductor magneto-plasma. Possible applications of the structure for construction of practical nonreciprocal control devices for millimeter wavelengths are discussed.
{"title":"Session guided propagation and devices: Propagation along circular guide containing passive semiconductor magnetoplasma","authors":"V. Miteva, K. Ivanov","doi":"10.1109/irmm.1983.9126458","DOIUrl":"https://doi.org/10.1109/irmm.1983.9126458","url":null,"abstract":"An analytical technique is developed and applied to calculate and interpret the nonreciprocal transmission characteristics of a circular guide, containing passive semiconductor magneto-plasma. Possible applications of the structure for construction of practical nonreciprocal control devices for millimeter wavelengths are discussed.","PeriodicalId":314918,"journal":{"name":"1983 Eighth International Conference on Infrared and Millimeter Waves","volume":"61 3-4","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1983-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120906358","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}
Pub Date : 1983-12-01DOI: 10.1109/IRMM.1983.9126530
S. von Laven, S. Segall, J. Ward
In the KMS Fusion two-stage free electron laser (FEL) experiment, the first-stage and second-stage radiation must suffer low losses in the oscillator. The electromagnetic modes overlap each other (and the electron beam) in a TE01 waveguide but separate before reaching the end mirrors.
{"title":"Cavity design for a two-stage FEL","authors":"S. von Laven, S. Segall, J. Ward","doi":"10.1109/IRMM.1983.9126530","DOIUrl":"https://doi.org/10.1109/IRMM.1983.9126530","url":null,"abstract":"In the KMS Fusion two-stage free electron laser (FEL) experiment, the first-stage and second-stage radiation must suffer low losses in the oscillator. The electromagnetic modes overlap each other (and the electron beam) in a TE01 waveguide but separate before reaching the end mirrors.","PeriodicalId":314918,"journal":{"name":"1983 Eighth International Conference on Infrared and Millimeter Waves","volume":"6 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":"127294100","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}
Pub Date : 1983-12-01DOI: 10.1109/irmm.1983.9126405
D. Coon, S. Gunapala, R. Karunasiri, H. Muehlhoff
We describe a mode of infrared detection which involves the depletion of charge stored in localized states in semiconductors at low temperatures. This mode features very long integration times (up to 12 hours or more) and field-enhanced response beyond the usual long wavelength cutoff.
{"title":"IR detection by depletion of trapped charge","authors":"D. Coon, S. Gunapala, R. Karunasiri, H. Muehlhoff","doi":"10.1109/irmm.1983.9126405","DOIUrl":"https://doi.org/10.1109/irmm.1983.9126405","url":null,"abstract":"We describe a mode of infrared detection which involves the depletion of charge stored in localized states in semiconductors at low temperatures. This mode features very long integration times (up to 12 hours or more) and field-enhanced response beyond the usual long wavelength cutoff.","PeriodicalId":314918,"journal":{"name":"1983 Eighth International Conference on Infrared and Millimeter Waves","volume":"102 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":"125412984","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}
Pub Date : 1983-12-01DOI: 10.1109/irmm.1983.9126420
T. Hargreaves, S. Y. Park, R. Seeley, M. Read
A 100 kW proof of principle experiment has been assembled. The quasi-optical cavity is designed to resonate at a frequency of 115 GHz (λ = 2.6 mm, |B| = 41 kG) with an efficiency of 25%. Recent developments and experimental results will be discussed.
{"title":"NRL quasi-optical gyrotron","authors":"T. Hargreaves, S. Y. Park, R. Seeley, M. Read","doi":"10.1109/irmm.1983.9126420","DOIUrl":"https://doi.org/10.1109/irmm.1983.9126420","url":null,"abstract":"A 100 kW proof of principle experiment has been assembled. The quasi-optical cavity is designed to resonate at a frequency of 115 GHz (λ = 2.6 mm, |B| = 41 kG) with an efficiency of 25%. Recent developments and experimental results will be discussed.","PeriodicalId":314918,"journal":{"name":"1983 Eighth International Conference on Infrared and Millimeter Waves","volume":"16 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":"125532664","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}
Pub Date : 1983-12-01DOI: 10.1109/irmm.1983.9126490
M. Inguscio, N. Ioli, A. Moretti, G. Moruzzi, P. Roselli, F. Strumia
In the optically pumped far-infrared (FIR) laser an oscillating field can be applied directly on the laser medium. A resonance between a tunable RF field and any transition connected to one of the levels of the laser cycle will be detected as a change in the output power. Fig. 1 shows the three possible cases. Transition 1 decreases the output power, which is on the contrary, increased by transitions 2 and 3, even if the signal is smaller in these latter cases. Such an experiment is more conveniently referred to as a triple resonance (TR) experiment because of the simultaneous presence of three coherent radiation fields. The feasibility of TR was demonstrated in HCOOH (1) and CH3OH (2,3) FIR lasers.
{"title":"Triple resonance on the CH3OH laser: Asymmetry splittings and new lines","authors":"M. Inguscio, N. Ioli, A. Moretti, G. Moruzzi, P. Roselli, F. Strumia","doi":"10.1109/irmm.1983.9126490","DOIUrl":"https://doi.org/10.1109/irmm.1983.9126490","url":null,"abstract":"In the optically pumped far-infrared (FIR) laser an oscillating field can be applied directly on the laser medium. A resonance between a tunable RF field and any transition connected to one of the levels of the laser cycle will be detected as a change in the output power. Fig. 1 shows the three possible cases. Transition 1 decreases the output power, which is on the contrary, increased by transitions 2 and 3, even if the signal is smaller in these latter cases. Such an experiment is more conveniently referred to as a triple resonance (TR) experiment because of the simultaneous presence of three coherent radiation fields. The feasibility of TR was demonstrated in HCOOH (1) and CH3OH (2,3) FIR lasers.","PeriodicalId":314918,"journal":{"name":"1983 Eighth International Conference on Infrared and Millimeter Waves","volume":"276 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":"116161188","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}
Pub Date : 1983-12-01DOI: 10.1109/irmm.1983.9126524
G. K. Vlasov
Generation of far-infrared radiation by hot excitons in semiconductors (CdS) has been recently obtained experimentally on a large amount of transitions. It is shown theoretically that selection of separate lines can be achieved, in particular, by lowering temperature to ≤4.2K (herewith many of lines those intensities depend on the exciton wave vector would disappear) and by the use of different induced lattices of exciton states inverse population. Tuning is achievable by pressure, applied magnetic field and changing excitation level.
{"title":"Frequency tuning of far-infrared radiation on hot excitons","authors":"G. K. Vlasov","doi":"10.1109/irmm.1983.9126524","DOIUrl":"https://doi.org/10.1109/irmm.1983.9126524","url":null,"abstract":"Generation of far-infrared radiation by hot excitons in semiconductors (CdS) has been recently obtained experimentally on a large amount of transitions. It is shown theoretically that selection of separate lines can be achieved, in particular, by lowering temperature to ≤4.2K (herewith many of lines those intensities depend on the exciton wave vector would disappear) and by the use of different induced lattices of exciton states inverse population. Tuning is achievable by pressure, applied magnetic field and changing excitation level.","PeriodicalId":314918,"journal":{"name":"1983 Eighth International Conference on Infrared and Millimeter Waves","volume":"43 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":"122318745","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}
Pub Date : 1983-12-01DOI: 10.1109/irmm.1983.9126402
G. Carr, D. Karecki, S. Perkowitz
Non-bolometric detection is observed in granular superconducting NbN films. Detection, related to the non-linear I-V's, occures over a large bias range. Preliminary results give a sensitivity of 20 V/W and NEP of 5×10−6W at 4 K. Granular NbN films show no apparent degradation with time.
{"title":"Granular superconducting NbN films as submillimeter detectors","authors":"G. Carr, D. Karecki, S. Perkowitz","doi":"10.1109/irmm.1983.9126402","DOIUrl":"https://doi.org/10.1109/irmm.1983.9126402","url":null,"abstract":"Non-bolometric detection is observed in granular superconducting NbN films. Detection, related to the non-linear I-V's, occures over a large bias range. Preliminary results give a sensitivity of 20 V/W and NEP of 5×10−6W at 4 K. Granular NbN films show no apparent degradation with time.","PeriodicalId":314918,"journal":{"name":"1983 Eighth International Conference on Infrared and Millimeter Waves","volume":"46 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":"123003605","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}
Pub Date : 1983-12-01DOI: 10.1109/irmm.1983.9126526
J. Pasour, R. Lucey, C. Kapetanakos
A 2-μ sec-duration electron beam from an induction linac is used to drive a free electron laser (FEL). Experiments using a helical wiggler without any external focusing have made possible an unambiguous study of the FEL radiation. Power levels of 2–4 MW have been measured at ∼ 30 GHz, corresponding to an interaction efficiency of 1.5–3%.
{"title":"Long-Pulse, high-current free electron laser with no external focusing","authors":"J. Pasour, R. Lucey, C. Kapetanakos","doi":"10.1109/irmm.1983.9126526","DOIUrl":"https://doi.org/10.1109/irmm.1983.9126526","url":null,"abstract":"A 2-μ sec-duration electron beam from an induction linac is used to drive a free electron laser (FEL). Experiments using a helical wiggler without any external focusing have made possible an unambiguous study of the FEL radiation. Power levels of 2–4 MW have been measured at ∼ 30 GHz, corresponding to an interaction efficiency of 1.5–3%.","PeriodicalId":314918,"journal":{"name":"1983 Eighth International Conference on Infrared and Millimeter Waves","volume":"80 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":"121883449","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}
Pub Date : 1983-12-01DOI: 10.1109/irmm.1983.9126336
F. Stauffer, D. Boyd, M. McCarthy
An electron cyclotron emission diagnostic based upon a commercial fast-scanning Michelson interferometer with a mirror reciprocation frequency of 36.5 Hz and spectral resolution of 3 GHz is being prepared. An overview of the light collection optics and the spectrometer will be given.
{"title":"The Fourier spectrometer ECE diagnostic system for the TFTR tokamak","authors":"F. Stauffer, D. Boyd, M. McCarthy","doi":"10.1109/irmm.1983.9126336","DOIUrl":"https://doi.org/10.1109/irmm.1983.9126336","url":null,"abstract":"An electron cyclotron emission diagnostic based upon a commercial fast-scanning Michelson interferometer with a mirror reciprocation frequency of 36.5 Hz and spectral resolution of 3 GHz is being prepared. An overview of the light collection optics and the spectrometer will be given.","PeriodicalId":314918,"journal":{"name":"1983 Eighth International Conference on Infrared and Millimeter Waves","volume":"7 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":"128325789","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}
京公网安备 11010802042870号
京ICP备2023020795号-1
扫码关注我们
求助内容：
应助结果提醒方式：