Infrared and Millimeter Waves, Conference Digest of the 2004 Joint 29th International Conference on 2004 and 12th International Conference on Terahertz Electronics, 2004.最新文献
Pub Date : 2004-01-01DOI: 10.1109/ICIMW.2004.1422199
K. Sakai
Optoelectronic terahertz pulse technologies have made remarkable progress and their applications are expanding widely. Although emission or detection techniques have been established, they are still being investigated by researchers interested in emission or detection mechanisms, or by others intended to improve performance. This work describes ultra-broadband emission and detection with an emphasis on PC-antenna detection. Applications in spectroscopy and imaging are also discussed.
{"title":"Advances in terahertz pulse technology","authors":"K. Sakai","doi":"10.1109/ICIMW.2004.1422199","DOIUrl":"https://doi.org/10.1109/ICIMW.2004.1422199","url":null,"abstract":"Optoelectronic terahertz pulse technologies have made remarkable progress and their applications are expanding widely. Although emission or detection techniques have been established, they are still being investigated by researchers interested in emission or detection mechanisms, or by others intended to improve performance. This work describes ultra-broadband emission and detection with an emphasis on PC-antenna detection. Applications in spectroscopy and imaging are also discussed.","PeriodicalId":13627,"journal":{"name":"Infrared and Millimeter Waves, Conference Digest of the 2004 Joint 29th International Conference on 2004 and 12th International Conference on Terahertz Electronics, 2004.","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2004-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79953508","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 : 2004-01-01DOI: 10.1109/ICIMW.2004.1422144
M. Lust, A. Otto, A. Pucci
Infrared (IR) and surface-enhanced Raman spectroscopy (SERS) of similarly prepared samples show different results that cannot be explained by different selection rules. One main difference is the missing of a signal of NO in the SERS spectra, only reaction products like N/sub 2/ and N/sub 2/O could be seen, whereas in IR clearly NO vibrations were detected. IR spectra were taken to investigate the influence of additional heat and additional photons during the measurement. Besides desorption, no influence like increase of the reaction products N/sub 2/ or N/sub 2/O could be found. It seems to us that a disturbance of the investigated system due to laser irradiation during SERS is not the explanation for the different findings.
{"title":"Comparison of IR and SERS spectroscopy for investigation of catalytic reactions on cold-deposited Cu","authors":"M. Lust, A. Otto, A. Pucci","doi":"10.1109/ICIMW.2004.1422144","DOIUrl":"https://doi.org/10.1109/ICIMW.2004.1422144","url":null,"abstract":"Infrared (IR) and surface-enhanced Raman spectroscopy (SERS) of similarly prepared samples show different results that cannot be explained by different selection rules. One main difference is the missing of a signal of NO in the SERS spectra, only reaction products like N/sub 2/ and N/sub 2/O could be seen, whereas in IR clearly NO vibrations were detected. IR spectra were taken to investigate the influence of additional heat and additional photons during the measurement. Besides desorption, no influence like increase of the reaction products N/sub 2/ or N/sub 2/O could be found. It seems to us that a disturbance of the investigated system due to laser irradiation during SERS is not the explanation for the different findings.","PeriodicalId":13627,"journal":{"name":"Infrared and Millimeter Waves, Conference Digest of the 2004 Joint 29th International Conference on 2004 and 12th International Conference on Terahertz Electronics, 2004.","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2004-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84846322","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 : 2004-01-01DOI: 10.1109/ICIMW.2004.1422235
A. Kuleshov, B. Yefimov
The research results of hybrid free-electron laser (FEL) design consisting of resonator and magnetron gun are presented here. The resonator is made of a circular waveguide segment and the periodic structure, which has form hollow cylindrical waveguide with transversal slits, is placed in this segment. When accelerating voltage was up to 20 kV the device radiated microwave power in 2-3 cm wavelength range. It was established that radiation was caused by synchronism of longitudinal velocity of cyclotron electron beam motion with phase velocity of slow space harmonic of the tube periodic structure. The synchronism of the wave and electron beam took place in a wide range of accelerating voltages. Cyclotron beam motions were driven by the leading magnetic field of the electrical magnet.
{"title":"Low-voltage hybrid FEL with comb waveguide","authors":"A. Kuleshov, B. Yefimov","doi":"10.1109/ICIMW.2004.1422235","DOIUrl":"https://doi.org/10.1109/ICIMW.2004.1422235","url":null,"abstract":"The research results of hybrid free-electron laser (FEL) design consisting of resonator and magnetron gun are presented here. The resonator is made of a circular waveguide segment and the periodic structure, which has form hollow cylindrical waveguide with transversal slits, is placed in this segment. When accelerating voltage was up to 20 kV the device radiated microwave power in 2-3 cm wavelength range. It was established that radiation was caused by synchronism of longitudinal velocity of cyclotron electron beam motion with phase velocity of slow space harmonic of the tube periodic structure. The synchronism of the wave and electron beam took place in a wide range of accelerating voltages. Cyclotron beam motions were driven by the leading magnetic field of the electrical magnet.","PeriodicalId":13627,"journal":{"name":"Infrared and Millimeter Waves, Conference Digest of the 2004 Joint 29th International Conference on 2004 and 12th International Conference on Terahertz Electronics, 2004.","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2004-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88265715","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 : 2004-01-01DOI: 10.1109/ICIMW.2004.1421960
M. Diem, M. Romeo, S. Boydston-White, M. Miljcovic, C. Matthaus
Human cells from different tissue types, and at different stages of disease, present slight differences in their infrared (IR) absorption spectra. Thus, IR spectroscopy offers the possibility of analyzing individual cells, or biopsy sections of tissues, for the presence of disease, based on totally objective measurements and computer-based analysis of the spectral information.
{"title":"Infrared spectral imaging of human cells and tissue: an approach to objective, machine-based histopathology","authors":"M. Diem, M. Romeo, S. Boydston-White, M. Miljcovic, C. Matthaus","doi":"10.1109/ICIMW.2004.1421960","DOIUrl":"https://doi.org/10.1109/ICIMW.2004.1421960","url":null,"abstract":"Human cells from different tissue types, and at different stages of disease, present slight differences in their infrared (IR) absorption spectra. Thus, IR spectroscopy offers the possibility of analyzing individual cells, or biopsy sections of tissues, for the presence of disease, based on totally objective measurements and computer-based analysis of the spectral information.","PeriodicalId":13627,"journal":{"name":"Infrared and Millimeter Waves, Conference Digest of the 2004 Joint 29th International Conference on 2004 and 12th International Conference on Terahertz Electronics, 2004.","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2004-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88404612","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 : 2004-01-01DOI: 10.1109/ICIMW.2004.1422038
Y. Novozhilova, A. Fernández, R. Martín, V. Pavelyev, M. Petelin
Stabilization of the gyrotron radiation frequency finds number of applications especially for plasma diagnostics. The gyrotron can be stabilised by a partial reflection from an external resonant load. For that, a quasi-optical cavity with a corrugated mirror can be implemented into the load, the nonresonant reflection being assumed sufficiently small. If the gyrotron operates at a mode with non-zero azimuthal index, a shallow Bragg corrugation of the output may be necessary to couple the reflected wave to the cavity mode and the quality factor (Q-factor) determines the stability against the self-consistent load frequency band from the phased reflections.
{"title":"Theory of gyrotron phase locked by resonant load","authors":"Y. Novozhilova, A. Fernández, R. Martín, V. Pavelyev, M. Petelin","doi":"10.1109/ICIMW.2004.1422038","DOIUrl":"https://doi.org/10.1109/ICIMW.2004.1422038","url":null,"abstract":"Stabilization of the gyrotron radiation frequency finds number of applications especially for plasma diagnostics. The gyrotron can be stabilised by a partial reflection from an external resonant load. For that, a quasi-optical cavity with a corrugated mirror can be implemented into the load, the nonresonant reflection being assumed sufficiently small. If the gyrotron operates at a mode with non-zero azimuthal index, a shallow Bragg corrugation of the output may be necessary to couple the reflected wave to the cavity mode and the quality factor (Q-factor) determines the stability against the self-consistent load frequency band from the phased reflections.","PeriodicalId":13627,"journal":{"name":"Infrared and Millimeter Waves, Conference Digest of the 2004 Joint 29th International Conference on 2004 and 12th International Conference on Terahertz Electronics, 2004.","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2004-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77306799","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 : 2004-01-01DOI: 10.1109/ICIMW.2004.1422176
R. Cao, M. Perkins, R. Vernon, J. Neilson
A new launcher designed for a TE/sub 22,6/ mode at 110 GHz has nearly all of its power in a well collimated beam. A set of four beam-shaping mirrors without discontinuities has been designed to convert the output from this launcher to a Gaussian beam at an 88.1 mm diameter output window. The experimental fraction of power coupled to the output Gaussian beam is 99.0% with an overall system efficiency of 97.0%. Theoretical and cold-test results are presented.
{"title":"Design of a high efficiency launcher and mirror system for use in a 110 GHz TE/sub 22,6/ mode gyrotron","authors":"R. Cao, M. Perkins, R. Vernon, J. Neilson","doi":"10.1109/ICIMW.2004.1422176","DOIUrl":"https://doi.org/10.1109/ICIMW.2004.1422176","url":null,"abstract":"A new launcher designed for a TE/sub 22,6/ mode at 110 GHz has nearly all of its power in a well collimated beam. A set of four beam-shaping mirrors without discontinuities has been designed to convert the output from this launcher to a Gaussian beam at an 88.1 mm diameter output window. The experimental fraction of power coupled to the output Gaussian beam is 99.0% with an overall system efficiency of 97.0%. Theoretical and cold-test results are presented.","PeriodicalId":13627,"journal":{"name":"Infrared and Millimeter Waves, Conference Digest of the 2004 Joint 29th International Conference on 2004 and 12th International Conference on Terahertz Electronics, 2004.","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2004-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77370310","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 : 2004-01-01DOI: 10.1109/ICIMW.2004.1422276
J. Zeller, F. Jain
We present an analysis of a two-dimensional photonic crystal defect based coupled-cavity waveguide (D-CCW) designed in Si-air and InGaAsP-air material systems using finite-difference time-domain (FDTD) calculations. The CCW design facilitates single mode output with narrower linewidths than conventional photonic crystal (PC) waveguides. Relatively high quality factors were observed.
{"title":"Photonic crystal coupled-cavity waveguide for 1.55 /spl mu/m operation","authors":"J. Zeller, F. Jain","doi":"10.1109/ICIMW.2004.1422276","DOIUrl":"https://doi.org/10.1109/ICIMW.2004.1422276","url":null,"abstract":"We present an analysis of a two-dimensional photonic crystal defect based coupled-cavity waveguide (D-CCW) designed in Si-air and InGaAsP-air material systems using finite-difference time-domain (FDTD) calculations. The CCW design facilitates single mode output with narrower linewidths than conventional photonic crystal (PC) waveguides. Relatively high quality factors were observed.","PeriodicalId":13627,"journal":{"name":"Infrared and Millimeter Waves, Conference Digest of the 2004 Joint 29th International Conference on 2004 and 12th International Conference on Terahertz Electronics, 2004.","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2004-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77589011","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 : 2004-01-01DOI: 10.1109/ICIMW.2004.1421999
J. Lohr, R. Callis, J. Doane, Y. Gorelov, H. Grunloh, K. Kajiwara, J. Peavy, D. Ponce, J. Tooker, P. Borchard, S. Chu, S. Cauffman, L. Ives
A 110 GHz gyrotron designed for long pulse operation at P/sub rf/>1.0 MW is tested at the DIII-D facility. The unit is predicted to have efficiency >0.4 with collector potential depression. Some transmission line components require modification for operation at total rf energies >5 MJ per pulse. The ECH system is also being upgraded with the addition of three new gyrotrons.
{"title":"Preparation for tests of a 110 GHz gyrotron with collector potential depression and status of the ECH system on the DIII-D Tokamak","authors":"J. Lohr, R. Callis, J. Doane, Y. Gorelov, H. Grunloh, K. Kajiwara, J. Peavy, D. Ponce, J. Tooker, P. Borchard, S. Chu, S. Cauffman, L. Ives","doi":"10.1109/ICIMW.2004.1421999","DOIUrl":"https://doi.org/10.1109/ICIMW.2004.1421999","url":null,"abstract":"A 110 GHz gyrotron designed for long pulse operation at P/sub rf/>1.0 MW is tested at the DIII-D facility. The unit is predicted to have efficiency >0.4 with collector potential depression. Some transmission line components require modification for operation at total rf energies >5 MJ per pulse. The ECH system is also being upgraded with the addition of three new gyrotrons.","PeriodicalId":13627,"journal":{"name":"Infrared and Millimeter Waves, Conference Digest of the 2004 Joint 29th International Conference on 2004 and 12th International Conference on Terahertz Electronics, 2004.","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2004-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86927609","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 : 2004-01-01DOI: 10.1109/ICIMW.2004.1422037
G. Nusinovich
We present a historical overview of stochastic phenomena in various relativistic gyrodevices. In stochastic process, the attention was focused on the analysis of temporal evolution of the electromagnetic (EM) field excited by an electron beam. It was shown that typically, as the beam current ratio to the start current increases, the EM field exhibits the series of transitions from stationary oscillations with the constant amplitude to the automodulation, and then to irregular oscillations, which can be treated as choatic ones and these oscillations were observed in gyro-BWO. In high power relativistic gyrodevices, the treatment was carried out assuming that the interaction between electrons and EM field takes place at an isolated fundamental cyclotron resonance exploiting weakly relativistic electron beams. We present the simulation corresponds to a second harmonic relativistic 30 GHz gyroklystron driven by a 500 kV electron beam and operating at the TE/sub 2,1/-mode at about 60 MW output power.
{"title":"Stochastic phenomena in relativistic gyrodevices","authors":"G. Nusinovich","doi":"10.1109/ICIMW.2004.1422037","DOIUrl":"https://doi.org/10.1109/ICIMW.2004.1422037","url":null,"abstract":"We present a historical overview of stochastic phenomena in various relativistic gyrodevices. In stochastic process, the attention was focused on the analysis of temporal evolution of the electromagnetic (EM) field excited by an electron beam. It was shown that typically, as the beam current ratio to the start current increases, the EM field exhibits the series of transitions from stationary oscillations with the constant amplitude to the automodulation, and then to irregular oscillations, which can be treated as choatic ones and these oscillations were observed in gyro-BWO. In high power relativistic gyrodevices, the treatment was carried out assuming that the interaction between electrons and EM field takes place at an isolated fundamental cyclotron resonance exploiting weakly relativistic electron beams. We present the simulation corresponds to a second harmonic relativistic 30 GHz gyroklystron driven by a 500 kV electron beam and operating at the TE/sub 2,1/-mode at about 60 MW output power.","PeriodicalId":13627,"journal":{"name":"Infrared and Millimeter Waves, Conference Digest of the 2004 Joint 29th International Conference on 2004 and 12th International Conference on Terahertz Electronics, 2004.","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2004-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87066765","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 : 2004-01-01DOI: 10.1109/ICIMW.2004.1422232
T. Kikuzawa, A. Moon, H. Yamada
MIRRORCLE-20 is the exact circular portable synchrotron light source that covers the wavelength from a few to 100 micron regions. We could extract the 14% synchrotron lights out of the lights from the entire circular electron orbit. The white light is extremely useful in spectroscopy experiments. We have shown the results of the fabricated dispersive type irradiation system and some applications.
{"title":"Progresses in the MIRRORCLE-20 project and applications","authors":"T. Kikuzawa, A. Moon, H. Yamada","doi":"10.1109/ICIMW.2004.1422232","DOIUrl":"https://doi.org/10.1109/ICIMW.2004.1422232","url":null,"abstract":"MIRRORCLE-20 is the exact circular portable synchrotron light source that covers the wavelength from a few to 100 micron regions. We could extract the 14% synchrotron lights out of the lights from the entire circular electron orbit. The white light is extremely useful in spectroscopy experiments. We have shown the results of the fabricated dispersive type irradiation system and some applications.","PeriodicalId":13627,"journal":{"name":"Infrared and Millimeter Waves, Conference Digest of the 2004 Joint 29th International Conference on 2004 and 12th International Conference on Terahertz Electronics, 2004.","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2004-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90591714","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}
Infrared and Millimeter Waves, Conference Digest of the 2004 Joint 29th International Conference on 2004 and 12th International Conference on Terahertz Electronics, 2004.
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