Zobrazeno 1 - 10
of 22
pro vyhledávání: '"Maria M. Melnikova"'
Publikováno v:
Journal of Infrared, Millimeter, and Terahertz Waves. 42:446-461
The effect of delayed reflection on frequency stabilization and pulling in a gyrotron oscillator is studied. Simple theoretical formulas for start-oscillation current, oscillation frequency, and frequency stabilization rate are derived in the framewo
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::43edaf1021e3719f8fd4b9930209e55f
https://doi.org/10.1007/s10762-021-00768-9
https://doi.org/10.1007/s10762-021-00768-9
Autor:
Shunsuke Tanaka, Teruo Saito, Ryuji Shinbayashi, Yuusuke Yamaguchi, Yoshinori Tatematsu, Masafumi Fukunari, Maria M. Melnikova, Nikita M. Ryskin
Publikováno v:
Journal of Infrared, Millimeter, and Terahertz Waves. 41:697-710
Equi-distantly distributed multi-peak frequency spectrum was observed in a high-power 300-GHz band gyrotron for the case of strong reflection off the vacuum window. An oscillation mode different from the design mode can oscillate by adjusting the mag
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2bedb11beac2b40a9f3d0ad9b7c5922b
https://doi.org/10.1007/s10762-020-00695-1
https://doi.org/10.1007/s10762-020-00695-1
Autor:
Nikita M. Ryskin, Maria M. Melnikova
Publikováno v:
2021 46th International Conference on Infrared, Millimeter and Terahertz Waves (IRMMW-THz).
Reflections may have a strong effect on mode-competition scenario in a multimode gyrotron. In this work, we study self-injection locking by delayed reflection of the multimode gyrotron with fixed Gaussian profile of the RF field. We demonstrate a pos
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d90c4397a60db3a938111127753ab2cb
https://doi.org/10.1109/irmmw-thz50926.2021.9567482
https://doi.org/10.1109/irmmw-thz50926.2021.9567482
Publikováno v:
Fourth International Conference on Terahertz and Microwave Radiation: Generation, Detection, and Applications.
Gyrotrons are the most powerful radiation sources in sub-THz and THz bands, which are of great importance for many applications, such as electron-cyclotron plasma heating, DNP/NMR spectroscopy, plasma diagnostics, biomedical applications, etc. All of
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::8f6d7446cc8711b5313ee65e69d2b36d
https://doi.org/10.1117/12.2580073
https://doi.org/10.1117/12.2580073
Publikováno v:
2020 45th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz).
In this paper, we present the results of time-domain self-consistent simulation of the second-harmonic 0.394-THz gyrotron with delayed reflection. We demonstrate the possibility of improving frequency stability and enhance of the frequency tunability
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::045476ab058997e844a5e9d5ab588038
https://doi.org/10.1109/irmmw-thz46771.2020.9370696
https://doi.org/10.1109/irmmw-thz46771.2020.9370696
Autor:
Taisei Ozura, Yoshinori Tatematsu, Yuusuke Yamaguchi, Nikita M. Ryskin, Masafumi Fukunari, Masato Watanabe, Andrey G. Rozhnev, Maria M. Melnikova, Teruo Saito
Publikováno v:
2020 45th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz).
A complex cavity was fabricated to improve the mode selection property of a gyrotron for the 400 GHz second-harmonic oscillation. A combination of the TE 8,3 and the TE 8,5 modes was selected to provide resonant coupling. In the experiment, many fund
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::8103858cb69649cef9c880800e5f0018
https://doi.org/10.1109/irmmw-thz46771.2020.9370438
https://doi.org/10.1109/irmmw-thz46771.2020.9370438
Publikováno v:
2020 International Conference on Actual Problems of Electron Devices Engineering (APEDE).
The method for calculation of start-oscillation conditions based on the stationary theory of a gyrotron with non-fixed (self-consistent) axial profile of the RF field is described. The calculations of start-oscillation currents and start-oscillation
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0bbfda5fdd477bd1fc9fac61a9dd9b17
https://doi.org/10.1109/apede48864.2020.9255520
https://doi.org/10.1109/apede48864.2020.9255520
Autor:
Teruo Saito, Yoshinori Tatematsu, Yuusuke Yamaguchi, Nikita M. Ryskin, Masafumi Fukunari, Maria M. Melnikova, Andrey G. Rozhnev
Publikováno v:
IEEE Transactions on Electron Devices. 64:5141-5146
Complex-cavity resonator with mode conversion is a promising way of improving mode selection properties of a terahertz gyrotron. In this paper, enhancement of the frequency tunability of the second-harmonic 0.4-THz gyrotron by using the complex-cavit
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1e72257c4eadc41a87d67cfdd014ec79
https://doi.org/10.1109/ted.2017.2764874
https://doi.org/10.1109/ted.2017.2764874
Publikováno v:
Journal of Infrared, Millimeter, and Terahertz Waves. 38:824-837
Effect of delayed reflection on operation of a second-harmonic terahertz (THz)-band gyrotron is studied. Theoretical analyses, numerical calculations, and experimental observations for the 0.394-THz Fukui University (FU) and continuous wave (CW) IIB
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e4dcd96c9475542ee80a4a7dabc11684
https://doi.org/10.1007/s10762-017-0378-x
https://doi.org/10.1007/s10762-017-0378-x
Autor:
Yu. V. Novozhilova, G. G. Denisov, M. Yu. Glyavin, Nikita M. Ryskin, Vladimir L. Bakunin, Andrey P. Fokin, Maria M. Melnikova, A. A. Bogdashov
Publikováno v:
Izvestiya VUZ. Applied Nonlinear Dynamics. 25:5-34
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::6ec9846d2622e70fea9a59e80d87b14a
https://doi.org/10.18500/0869-6632-2017-25-1-5-34
https://doi.org/10.18500/0869-6632-2017-25-1-5-34