Pub Date : 2013-06-23DOI: 10.1615/TELECOMRADENG.V73.I7.30
G. Alekseev, L. V. Stulova
The experimental studies on synchronous excitation of decelerated harmonics of the periodic structure field by an incident nonrelativistic beam were carried out, the possibility to realize the relay-race interaction principle in microwave devices with the transverse static magnetic field was analyzed. The investigations shown that the collective interaction between the extended (wide) sheet electron bunches and the vertical component of the space harmonic field in vacuum microwave oscillators could be significant with use of relay-race interaction mechanism. Experimental and theoretical studies into the possibility of the development of O-type oscillators with short-time distributed interaction of individual electrons under the condition of coherent (relay-race) addition of radiations are being made. The possibility of realization of relay-race interaction in klynotron-type devices with an electron beam, being obliquely incident on the periodic structure, is discussed.
{"title":"Relay-race interaction in microwave devices","authors":"G. Alekseev, L. V. Stulova","doi":"10.1615/TELECOMRADENG.V73.I7.30","DOIUrl":"https://doi.org/10.1615/TELECOMRADENG.V73.I7.30","url":null,"abstract":"The experimental studies on synchronous excitation of decelerated harmonics of the periodic structure field by an incident nonrelativistic beam were carried out, the possibility to realize the relay-race interaction principle in microwave devices with the transverse static magnetic field was analyzed. The investigations shown that the collective interaction between the extended (wide) sheet electron bunches and the vertical component of the space harmonic field in vacuum microwave oscillators could be significant with use of relay-race interaction mechanism. Experimental and theoretical studies into the possibility of the development of O-type oscillators with short-time distributed interaction of individual electrons under the condition of coherent (relay-race) addition of radiations are being made. The possibility of realization of relay-race interaction in klynotron-type devices with an electron beam, being obliquely incident on the periodic structure, is discussed.","PeriodicalId":104362,"journal":{"name":"2013 International Kharkov Symposium on Physics and Engineering of Microwaves, Millimeter and Submillimeter Waves","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-06-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114696693","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 : 2013-06-23DOI: 10.1109/MSMW.2013.6622103
I. Smirnov, E. Alekseev, V. Piddyachiy, V. Ilyushin, R. Motiyenko
We performed a new study of the 1,3-propanediol spectrum in a frequency range from 49 to 237 GHz. With the help of SPFIT program using a model of two substates between which the system tunnels a fit of 5902 rotational transitions with J ≤ 55 and Ka ≤ 30 within experimental error was obtained. Our results give an opportunity to produce reliable predictions of the 1,3-propanediol conformer I spectrum up to 300 GHz.
{"title":"Millimeter wave spectrum of conformer I of 1,3-propanediol (CH2OHCH2CH2OH) molecule","authors":"I. Smirnov, E. Alekseev, V. Piddyachiy, V. Ilyushin, R. Motiyenko","doi":"10.1109/MSMW.2013.6622103","DOIUrl":"https://doi.org/10.1109/MSMW.2013.6622103","url":null,"abstract":"We performed a new study of the 1,3-propanediol spectrum in a frequency range from 49 to 237 GHz. With the help of SPFIT program using a model of two substates between which the system tunnels a fit of 5902 rotational transitions with J ≤ 55 and Ka ≤ 30 within experimental error was obtained. Our results give an opportunity to produce reliable predictions of the 1,3-propanediol conformer I spectrum up to 300 GHz.","PeriodicalId":104362,"journal":{"name":"2013 International Kharkov Symposium on Physics and Engineering of Microwaves, Millimeter and Submillimeter Waves","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-06-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117191899","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 : 2013-06-23DOI: 10.1109/MSMW.2013.6622188
O. Rybin, L. Girinova
The partially magnetized state of ferrites is obviously important for microwave devices research in this area because magnetized ferrites are used in devices such as circulators, latching phase shifters, and tunable yttrium iron garnet filters and so on.
{"title":"Microwave effective permeability tensor of partially magnetized two-component lossless ferrite-like metamaterials","authors":"O. Rybin, L. Girinova","doi":"10.1109/MSMW.2013.6622188","DOIUrl":"https://doi.org/10.1109/MSMW.2013.6622188","url":null,"abstract":"The partially magnetized state of ferrites is obviously important for microwave devices research in this area because magnetized ferrites are used in devices such as circulators, latching phase shifters, and tunable yttrium iron garnet filters and so on.","PeriodicalId":104362,"journal":{"name":"2013 International Kharkov Symposium on Physics and Engineering of Microwaves, Millimeter and Submillimeter Waves","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-06-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123524103","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 : 2013-06-23DOI: 10.1109/MSMW.2013.6622200
N. Goncharuk, N. Karushkin, V. Malyshko, V. A. Orehovskiy
A model of small-signal impedance of semiconductor transit-time diode with injection time of electron negligible less than its transit time had been developed by Sze [1]. Modification of the model with consideration of injection delay has been applied on studying of semiconductor [2] and vacuum [3] resonant-tunneling diodes impedance. We apply the modification to investigate impedance of a diode on AlGaN micro-cathode with electron field emission and transit in vacuum layer with comparable emission and transit time delays.
{"title":"Terahertz diode on gallium nitride microcathode","authors":"N. Goncharuk, N. Karushkin, V. Malyshko, V. A. Orehovskiy","doi":"10.1109/MSMW.2013.6622200","DOIUrl":"https://doi.org/10.1109/MSMW.2013.6622200","url":null,"abstract":"A model of small-signal impedance of semiconductor transit-time diode with injection time of electron negligible less than its transit time had been developed by Sze [1]. Modification of the model with consideration of injection delay has been applied on studying of semiconductor [2] and vacuum [3] resonant-tunneling diodes impedance. We apply the modification to investigate impedance of a diode on AlGaN micro-cathode with electron field emission and transit in vacuum layer with comparable emission and transit time delays.","PeriodicalId":104362,"journal":{"name":"2013 International Kharkov Symposium on Physics and Engineering of Microwaves, Millimeter and Submillimeter Waves","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-06-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122164283","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 : 2013-06-23DOI: 10.1109/MSMW.2013.6622076
M. Glyavin, A. Luchinin, M. Morozkin
Terahertz waves are promising for diagnosis and spectroscopy of various media, including the development of high resolution electron paramagnetic resonance (EPR) and nuclear magnetic resonance (NMR) spectroscopy. Powerful terahertz radiation can be used to create dense plasma and control its parameters (controlled thermonuclear fusion, “point” plasma X-ray sources, remote detection of ionizing radiation). In the pioneering IAP RAS works in 1970-1980's was shown the principle possibility of a high-power CW and pulsed gyrotrons operation at frequencies from 0.33 to 0.65 THz. In recent years a number of new results at the development of THz band gyrotrons has been obtained at IAP (see, for detail, review [1-4]). This report will focused at two of them - the penetration of gyrotrons in the frequency range above 1 THz and generation of hundreds kW power at THz band. The experiments based on the original pulsed solenoid with a magnetic field up to 50 T yielded generation on the main cyclotron resonance with 5-0.5 kW power in single pulse duration of 50 microseconds at record frequencies 1-1.3 THz [5,6] and with pulsed power up to 200 kW at 0.7 THz band [7].
{"title":"Development and experimental investigations of high power THz gyrotrons","authors":"M. Glyavin, A. Luchinin, M. Morozkin","doi":"10.1109/MSMW.2013.6622076","DOIUrl":"https://doi.org/10.1109/MSMW.2013.6622076","url":null,"abstract":"Terahertz waves are promising for diagnosis and spectroscopy of various media, including the development of high resolution electron paramagnetic resonance (EPR) and nuclear magnetic resonance (NMR) spectroscopy. Powerful terahertz radiation can be used to create dense plasma and control its parameters (controlled thermonuclear fusion, “point” plasma X-ray sources, remote detection of ionizing radiation). In the pioneering IAP RAS works in 1970-1980's was shown the principle possibility of a high-power CW and pulsed gyrotrons operation at frequencies from 0.33 to 0.65 THz. In recent years a number of new results at the development of THz band gyrotrons has been obtained at IAP (see, for detail, review [1-4]). This report will focused at two of them - the penetration of gyrotrons in the frequency range above 1 THz and generation of hundreds kW power at THz band. The experiments based on the original pulsed solenoid with a magnetic field up to 50 T yielded generation on the main cyclotron resonance with 5-0.5 kW power in single pulse duration of 50 microseconds at record frequencies 1-1.3 THz [5,6] and with pulsed power up to 200 kW at 0.7 THz band [7].","PeriodicalId":104362,"journal":{"name":"2013 International Kharkov Symposium on Physics and Engineering of Microwaves, Millimeter and Submillimeter Waves","volume":"45 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-06-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125978633","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 : 2013-06-23DOI: 10.1109/MSMW.2013.6622030
D. Abdulkadyrov, N. Beletskii
In this paper we investigate tunneling of electrons through a non-stationary non-symmetric magnetic tunnel junction (MTJ) in the approximation of small amplitude of a.c. bias voltage. We study the influence of non-symmetry of MTJ potential barrier on the effect of giant tunneling magnetoimpedance. In addition we analyze the effect of potential barrier width and d.c. bias voltage value on the frequency dependence of giant tunneling magnetoimpedance. Magnetic tunnel junctions (MTJs) exhibit giant magnetoresistance at room temperature. Because of this they are widely used for investigating spin-polarized electron transport in magnetic nanostructures and for designing novel spin-dependent nanoelectronic devices Refs. 1-5.
{"title":"Magnetorezistive effect of a non-stationary non-symmetric magnetic tunnel junction","authors":"D. Abdulkadyrov, N. Beletskii","doi":"10.1109/MSMW.2013.6622030","DOIUrl":"https://doi.org/10.1109/MSMW.2013.6622030","url":null,"abstract":"In this paper we investigate tunneling of electrons through a non-stationary non-symmetric magnetic tunnel junction (MTJ) in the approximation of small amplitude of a.c. bias voltage. We study the influence of non-symmetry of MTJ potential barrier on the effect of giant tunneling magnetoimpedance. In addition we analyze the effect of potential barrier width and d.c. bias voltage value on the frequency dependence of giant tunneling magnetoimpedance. Magnetic tunnel junctions (MTJs) exhibit giant magnetoresistance at room temperature. Because of this they are widely used for investigating spin-polarized electron transport in magnetic nanostructures and for designing novel spin-dependent nanoelectronic devices Refs. 1-5.","PeriodicalId":104362,"journal":{"name":"2013 International Kharkov Symposium on Physics and Engineering of Microwaves, Millimeter and Submillimeter Waves","volume":"168 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-06-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124687547","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 : 2013-06-23DOI: 10.1109/MSMW.2013.6622136
S. Romanenko, P. Siegel, V. Pikov
Possible effects of millimeter waves(MMWs) on biological objectsbecomes an increasingly important issue due to development of technologies for telecommunication, telemedicine and security/military applications operating at this extremely high radiofrequency band. Specifically, the safety limits of MMW irradiationof neuronal tissueneed to be evaluated.In this study, we evaluated the thermal and physiological effects of MMWs on the neural ganglia isolated from the leech. The initial results indicate that low-intensity MMWs can partially suppress the neuronal activity at relatively low levels of applied MMW power density, with associated sub-1°C heating of the ganglion. Further studies are underway to determine if altered conductivity through the membrane channels might be responsible for the observed effects.
{"title":"Microdosimetry and physiological effects of millimeter wave irradiation in isolated neural ganglion preparation","authors":"S. Romanenko, P. Siegel, V. Pikov","doi":"10.1109/MSMW.2013.6622136","DOIUrl":"https://doi.org/10.1109/MSMW.2013.6622136","url":null,"abstract":"Possible effects of millimeter waves(MMWs) on biological objectsbecomes an increasingly important issue due to development of technologies for telecommunication, telemedicine and security/military applications operating at this extremely high radiofrequency band. Specifically, the safety limits of MMW irradiationof neuronal tissueneed to be evaluated.In this study, we evaluated the thermal and physiological effects of MMWs on the neural ganglia isolated from the leech. The initial results indicate that low-intensity MMWs can partially suppress the neuronal activity at relatively low levels of applied MMW power density, with associated sub-1°C heating of the ganglion. Further studies are underway to determine if altered conductivity through the membrane channels might be responsible for the observed effects.","PeriodicalId":104362,"journal":{"name":"2013 International Kharkov Symposium on Physics and Engineering of Microwaves, Millimeter and Submillimeter Waves","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-06-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124717213","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 : 2013-06-23DOI: 10.1109/MSMW.2013.6621993
N. Peskov, N. Ginzburg, A. Sergeev, A. Arzhannikov, S. Sinitsky, A. K. Kaminsky, S. Sedykh
High-efficiency Ka-band FEM-oscillator was elaborated during the last few years in collaboration between JINR (Dubna) and IAP RAS (N.Novgorod). The induction linac LIU-3000 (JINR), which generates a 0.8 MeV / 200 A / 250 ns electron beam with a repetition rate of 1 Hz, drives the FEM-oscillator. Transverse velocity in the magnetically guided beam is pumped in a helical wiggler of 6 cm period. The main advantages of the JINR-IAP FEM is the use of a reversed guide magnetic field, which provides high-quality beam formation in the tapered wiggler section with a low sensitivity to the initial beam spread, alongside with Bragg resonator having a step of phase of corrugation [2], which possesses high electrodynamical mode selection. As a result, stabile single-mode operation with high electron efficiency was achieved in the FEM. At the present stage the FEM generates 20 MW / 200 ns pulses at 30 GHz with the spectrum width of 6 - 7 MHz, which is close to the theoretical limit (Fig.2). Stability of the FEM radiation parameters (frequency, output power, pulse shape, etc.) was demonstrated over a sequence of ~ 105 pulses.
{"title":"Powerful free-electron masers with novel Bragg resonators","authors":"N. Peskov, N. Ginzburg, A. Sergeev, A. Arzhannikov, S. Sinitsky, A. K. Kaminsky, S. Sedykh","doi":"10.1109/MSMW.2013.6621993","DOIUrl":"https://doi.org/10.1109/MSMW.2013.6621993","url":null,"abstract":"High-efficiency Ka-band FEM-oscillator was elaborated during the last few years in collaboration between JINR (Dubna) and IAP RAS (N.Novgorod). The induction linac LIU-3000 (JINR), which generates a 0.8 MeV / 200 A / 250 ns electron beam with a repetition rate of 1 Hz, drives the FEM-oscillator. Transverse velocity in the magnetically guided beam is pumped in a helical wiggler of 6 cm period. The main advantages of the JINR-IAP FEM is the use of a reversed guide magnetic field, which provides high-quality beam formation in the tapered wiggler section with a low sensitivity to the initial beam spread, alongside with Bragg resonator having a step of phase of corrugation [2], which possesses high electrodynamical mode selection. As a result, stabile single-mode operation with high electron efficiency was achieved in the FEM. At the present stage the FEM generates 20 MW / 200 ns pulses at 30 GHz with the spectrum width of 6 - 7 MHz, which is close to the theoretical limit (Fig.2). Stability of the FEM radiation parameters (frequency, output power, pulse shape, etc.) was demonstrated over a sequence of ~ 105 pulses.","PeriodicalId":104362,"journal":{"name":"2013 International Kharkov Symposium on Physics and Engineering of Microwaves, Millimeter and Submillimeter Waves","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-06-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124717819","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 : 2013-06-23DOI: 10.1109/MSMW.2013.6622042
E. A. Blushtein, A. Manturov
Scanning optical microscopy plays an important role in modern science, because it allows exploring microscopic objects in the optical domain with resolution about a few tens of nanometers, which significantly exceeds the capabilities of classical optical microscopes.
{"title":"Image resolution increasing in shadow tomographic microscopy via preliminary projection filtering","authors":"E. A. Blushtein, A. Manturov","doi":"10.1109/MSMW.2013.6622042","DOIUrl":"https://doi.org/10.1109/MSMW.2013.6622042","url":null,"abstract":"Scanning optical microscopy plays an important role in modern science, because it allows exploring microscopic objects in the optical domain with resolution about a few tens of nanometers, which significantly exceeds the capabilities of classical optical microscopes.","PeriodicalId":104362,"journal":{"name":"2013 International Kharkov Symposium on Physics and Engineering of Microwaves, Millimeter and Submillimeter Waves","volume":"37 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-06-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125041376","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 : 2013-06-23DOI: 10.1109/MSMW.2013.6622107
S. Rozanov, A. Shtanyuk, O. Bol'shakov, A. Zavgorodniy, E. P. Kropotkina, S. Kruglov, S. Logvinenko, A. Lukin, P. Nikiforov, I. Saenko, S. V. Solomonov
Ozone is one of the most important minor gas constituents of the atmosphere. Global depletion of the protective ozone layer in the last decades accompanied with such anomalous events as ozone holes in Antarctic and Arctic [1, 2] requires reliable long-term monitoring of ozone and ozone-related minor atmospheric gases from both satellites and ground level. Ground-based millimeter-wave (MMW) monitoring of atmospheric ozone is low-dependent on weather conditions, covers broad altitude region from the lower stratosphere to mesosphere, and is possible in day and night time [3, 4]. These features of MMW measurements provide their advantages over traditional optical methods (UV spectrometers and lidars) and ozone sondes.
{"title":"Transportable millimeter-wave spectrometer for monitoring of the atmospheric ozone","authors":"S. Rozanov, A. Shtanyuk, O. Bol'shakov, A. Zavgorodniy, E. P. Kropotkina, S. Kruglov, S. Logvinenko, A. Lukin, P. Nikiforov, I. Saenko, S. V. Solomonov","doi":"10.1109/MSMW.2013.6622107","DOIUrl":"https://doi.org/10.1109/MSMW.2013.6622107","url":null,"abstract":"Ozone is one of the most important minor gas constituents of the atmosphere. Global depletion of the protective ozone layer in the last decades accompanied with such anomalous events as ozone holes in Antarctic and Arctic [1, 2] requires reliable long-term monitoring of ozone and ozone-related minor atmospheric gases from both satellites and ground level. Ground-based millimeter-wave (MMW) monitoring of atmospheric ozone is low-dependent on weather conditions, covers broad altitude region from the lower stratosphere to mesosphere, and is possible in day and night time [3, 4]. These features of MMW measurements provide their advantages over traditional optical methods (UV spectrometers and lidars) and ozone sondes.","PeriodicalId":104362,"journal":{"name":"2013 International Kharkov Symposium on Physics and Engineering of Microwaves, Millimeter and Submillimeter Waves","volume":"92 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-06-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128670077","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}
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