Abstract
A sub-THz, second harmonic, multifrequency gyrotron, Gyrotron FU CW GVII, which radiates Gaussian beams, was developed. This device was designed to change the frequency in a stepwise manner in the range from 270 to 420 GHz. In this paper, we present the first experiments conducted using this gyrotron. Nine modes were selected for this study. The oscillation frequency of the selected modes was measured using a heterodyne system. The profiles of the Gaussian beams converted from the modes were assessed using an infrared camera, and the power of these beams was measured using a power meter. The oscillations of the nine second harmonic modes were successfully measured, and Gaussian beams converted from seven oscillation modes were observed. Four second harmonic modes, TE8,5, TE6,5, TE5,4, and TE2,6, oscillated in a single mode. The power of the beams ranged from 0.2 to 77 W. Even in the case of spurious oscillation of fundamental modes, the beams converted from the second harmonic modes could be separated from the fundamental mode beams by taking advantage of the different radiation directions emitted through the gyrotron window.
Similar content being viewed by others
References
O. Braz, G. Dammertz, M. Kuntze, M. Thumm, Int. J. Infrared Millim. Waves 18, 1465 (1997)
G. Dammertz, O. Dumbrajs, K. Koppenburg, B. Piosczyk, M. Thumm, J. Commun. Technol. Electron. 45, S60 (2000)
B. Piosczyk, A. Arnold, G. Dammertz, M. Kuntze, G. Michel, O.S. Lamba, M.K. Thumm, IEEE Trans. Plasma Sci. 28, 918 (2000)
M. Thumm, A. Arnold, E. Borie, O. Braz, G. Dammertz, O. Dumbrajs, K. Koppenburg, M. Kuntze, G. Michel, B. Piosczyk, Fusion Eng. Des. 53, 407 (2001)
K. Koppenburg, G. Dammertz, M. Kuntze, B. Piosczyk, M. Thumm, IEEE Tran. Electron Devices 48, 101 (2001)
O. Prinz, A. Arnold, G. Gantenbein, Y. Liu, M. Thumm, D. Wagner, IEEE Trans. Electron Devices 56, 828 (2009)
G. Gantenbein, A. Samartsev, G. Aiello, G. Dammertz, J. Jelonnek, M. Losert, A. Schlaich, T.A. Scherer, D. Strauss, M. Thumm, D. Wagner, IEEE Trans. Electron Devices 61, 1806 (2014)
A. Samartsev, K.A. Avramidis, G. Gantenbein, G. Dammertz, M. Thumm, J. Jelonnek, IEEE Trans. Electron Devices 62, 2317 (2015)
G.G. Denisov, A.G. Litvak, V.E. Myasnikov, E.M. Tai, V.E. Zapevalov, Nucl. Fusion 48, 054007 (2008)
T. Idehara, T. Tatsukawa, I. Ogawa, Y. Shimizu, S. Makino, T. Kanemaki, Phys. Fluids B 5, 1377 (1993)
K.D. Hong, G.F. Brand, T. Idehara, J. Appl. Phys. 74, 5250 (1993)
Y. Shimizu, S. Makino, K. Ichikawa, T. Kanemaki, T. Tatsukawa, T. Idehara, I. Ogawa, Phys. Plasmas 2, 2110 (1995)
T. Idehara, I. Ogawa, S. Mitsudo, M. Pereyaslavets, N. Nishida, K. Yoshida, IEEE Trans. Plasma Sci. 27, 340 (1999)
V.E. Zapevalov, V.K. Lygin, O.V. Malygin, M.A. Moiseev, V.I. Khizhnyak, V.P. Karpov, E.M. Tai, T. Idehara, S. Mitsudo, I. Ogawa, T. Saito, Radiophys. Quantum Electron. 50, 420 (2007)
T. Saito, T. Nakano, H. Hoshizuki, K. Sakai, Y. Tatematsu, S. Mitsudo, I. Ogawa, T. Idehara, V.E. Zapevalov, Int. J. Infrared Millim. Waves 28, 1063 (2007)
V. Bratman, M. Glyavin, T. Idehara, Y. Kalynov, A. Luchinin, V. Manuilov, S. Mitsudo, I. Ogawa, T. Saito, Y. Tatematsu, V. Zapevalov, IEEE Trans. Plasma Sci. 37, 36 (2009)
T. Idehara, S.P. Sabchevski, J. Infrared Millim. Terahertz Waves 33, 667 (2012)
Y. Tatematsu, Y. Yamaguchi, T. Idehara, T. Ozeki, R. Ikeda, T. Kanemaki, I. Ogawa, T. Saito, J. Infrared Millim. Terahertz Waves 33, 292 (2012)
Y. Tatematsu, Y. Yamaguchi, T. Idehara, T. Kawase, R. Ichioka, I. Ogawa, T. Saito, T. Fujiwara, J. Infrared Millim. Terahertz Waves 35, 169 (2014)
Y. Tatematsu, Y. Yamaguchi, T. Idehara, T. Kawase, I. Ogawa, T. Saito, T. Fujiwara, J. Infrared Millim. Terahertz Waves 35, 517 (2014)
Y. Tatematsu, Y. Yamaguchi, T. Kawase, R. Ichioka, I. Ogawa, T. Saito, T. Idehara, Phys. Plasmas 21, 083113 (2014)
T. Idehara, Y. Tatematsu, Y. Yamaguchi, E.M. Khutoryan, A.N. Kuleshov, K. Ueda, Y. Matsuki, T. Fujiwara, J. Infrared Millim. Terahertz Waves 36, 613 (2015)
Y. Tatematsu, Y. Yamaguchi, R. Ichioka, M. Kotera, T. Saito, T. Idehara, J. Infrared Millim. Terahertz Waves 36, 697 (2015)
Y. Matsuki, K. Ueda, T. Idehara, R. Ikeda, K. Kosuga, I. Ogawa, S. Nakamura, M. Toda, T. Anai, T. Fujiwara, J. Infrared Millim. Terahertz Waves 33, 745 (2012)
Y. Matsuki, K. Ueda, T. Idehara, R. Ikeda, I. Ogawa, S. Nakamura, M. Toda, T. Anai, T. Fujiwara, J. Mag. Res. 225, 1 (2012)
F. Horii, T. Idehara, Y. Fujii, I. Ogawa, A. Horii, G. Entzminger, F.D. Doty, J. Infrared Millim. Terahertz Waves 33, 756 (2012)
Y. Matsuki, T. Idehara, J. Fukazawa, T. Fujiwara, J. Mag. Res. 264, 107 (2016)
T. Yamazaki, A. Miyazaki, T. Suehara, T. Namba, S. Asai, T. Kobayashi, H. Saito, I. Ogawa, T. Idehara, S. Sabchevski, Phys. Rev. Lett. 108, 253401 (2012)
A. Miyazaki, T. Yamazaki, T. Suehara, T. Namba, S. Asai, T. Kobayashi, H. Saito, T. Idehara, I. Ogawa, Y. Tatematsu, J. Infrared Millim. Terahertz. Waves 35, 91 (2014)
A. Miyazaki, T. Yamazaki, T. Suehara, T. Namba, S. Asai, T. Kobayashi, H. Saito, Y. Tatematsu, I. Ogawa, T. Idehara, Prog. Theor. Exp. Phys. 2015, 011C01 (2015)
S. Mitsudo, S. Inagaki, I.N. Sudiana, K. Kuwayama, Adv. Mat. Res. 789, 279 (2013)
I.N. Sudiana, R. Ito, S. Inagaki, K. Kuwayama, K. Sako, S. Mitsudo, J. Infrared Milli. Terahertz Waves 34, 627 (2013)
K. Kato, H. Qiu, E.M. Khutoryan, Y. Tatematsu, M. Tani, T. Idehara, Y. Yamaguchi, M. Fukunari, Y. Maeda, K. Takayama, Y. Minami, M.J.F. Empizo, T. Kurihara, K. Yamanoi, T. Shimizu, K. Takano, N. Sarukura, T. Fukuda, M. Yoshimura, M. Nakajima, Appl. Phys. Lett. 111, 031108 (2017)
Y. Toda, S. Ishiyama, E. Khutoryan, T. Idehara, S. Matsuishi, P.V. Sushko, H. Hosono, ACS Nano 11, 12358 (2017)
S. Yamazaki, M. Harata, T. Idehara, K. Konagaya, G. Yokoyama, H. Hoshina, Y. Ogawa, Sci. Rep. 8, 9990 (2018)
D. Wagner, G. Grünwald, F. Leuterer, A. Manini, F. Monaco, M. Münich, H. Schütz, J. Stober, H. Zohm, T. Franke, M. Thumm, G. Gantenbein, R. Heidinger, A. Meier, W. Kasparek, C. Lechte, A. Litvak, G.G. Denisov, A.V. Chirkov, E.M. Tai, L.G. Popov, V.O. Nichiporenko, V.E. Myasnikov, E.A. Solyanova, S.A. Malygin, F. Meo, P. Woskov, Nucl. Fusion 48, 054006 (2008)
T. Kobayashi, S. Moriyama, K. Yokokura, M. Sawahata, M. Terakado, S. Hiranai, K. Wada, Y. Sato, J. Hinata, K. Hoshino, A. Isayama, Y. Oda, R. Ikeda, K. Takahashi, K. Sakamoto, Nucl. Fusion 55, 063008 (2015)
R. Ikeda, Y. Oda, T. Kobayashi, K. Kajiwara, M. Terakado, K. Takahashi, S. Moriyama, K. Sakamoto, J. Infrared Millim. Terahertz Waves 38, 531 (2017)
Y. Yamaguchi, Y. Tatematsu, Y. Maeda, K. Takayama, M. Fukunari, M. Iizawa, T. Saito, 42nd Int. Conf. Infrared Millim. Terahertz Waves, RD-43 (2017)
A. Möbius, M. Thumm, in Gyrotron Oscillators, Their Principles and Practice, ed. by C.J. Edgcombe (Taylor & Francis, London, 1993), pp. 179–222
M.V. Kartikeyan, E. Borie, M.K.A. Thumm, Gyrotrons, High-Power Microwave and Millimeter Wave Technology (Springer-Verlag Berlin Heidelberg, 2004), pp. 127–146
C.C. Johnson, Field and wave electrodynamics (McGraw-Hill, New York, 1965), pp. 47–69
M. Thumm, State-of-the-art of High Power Gyro-Devices and Free Electron Masers, Update 2017 (KIT Scientific Publication, Karlsruhe, 2018)
E. Borie, G. Gantenbein, B. Jödicke, G. Dammertz, O. Dumbrajs, T. Geist, G. Hochschild, M. Kuntze, H.-U. Nickel, B. Piosczyk, M. Thumm, Int. J. Electronics 72, 687 (1992)
T. Idehara, J.C. Mudiganti, L. Agusu, T. Kanemaki, I. Ogawa, T. Fujiwara, Y. Matsuki, K. Ueda, J. Infrared Millim. Terahertz Waves 33, 724 (2012)
Acknowledgments
The lead author would like to thank Prof. Yukihisa Suzuki and Dr. Maya Mizuno for their support in the calibration of the power meter.
Funding
This work was partly supported by a special fund for research projects from the Ministry of Education, Culture, Sports, Science and Technology of Japan and by JSPS KAKENHI (Grant Number: 17K05725).
Author information
Authors and Affiliations
Corresponding author
Ethics declarations
Conflict of Interest
The authors declare that they have no conflict of interest.
Additional information
Publisher’s Note
Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.
Rights and permissions
About this article
Cite this article
Tatematsu, Y., Yamaguchi, Y., Fukunari, M. et al. Development of Gyrotron FU CW GVII: a Second Harmonic, Multifrequency Gyrotron that Radiates Gaussian Beams. J Infrared Milli Terahz Waves 41, 576–589 (2020). https://doi.org/10.1007/s10762-020-00681-7
Received:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s10762-020-00681-7