8 Papers
24 Citations
H. Igami is an academic researcher from National Institutes of Natural Sciences, Japan. The author has contributed to research in topics: Large Helical Device & Gyrotron. The author has an hindex of 5, co-authored 8 publications.
Chat about Author
Papers
ECRH-Related Technologies for High-Power and Steady-State Operation in LHD
Takashi Shimozuma,H. Takahashi,S. Kubo,Y. Yoshimura,H. Igami,Y. Takita,Sakuji Kobayashi,Satoshi Ito,Yoshinori Mizuno,Hiroshi Idei,Takashi Notake,M. Sato,K. Ohkubo,T. Watari,T. Mutoh,R. Minami,Tsuyoshi Kariya,Tsuyoshi Imai +17 more
TL;DR: In this paper, a steady operation of the electron cyclotron resonance heating (ECRH) system on the Large Helical Device (LHD) has been demonstrated in numerous plasma experiments.
43
Handling TecHnology of Mega-WaTT MilliMeTer-Waves for opTiMized HeaTing of fusion plasMas
Takashi Shimozuma,S. Kubo,Y. Yoshimura,H. Igami,H. Takahashi,Y. Takita,Sakuji Kobayashi,Satoshi Ito,Yoshinori Mizuno,Hiroshi Idei,Takashi Notake,Michael A. Shapiro,Richard J. Temkin,Federico Felici,Timothy Goodman,Olivier Sauter,Ryutaro Minami,Tsuyoshi Kariya,Tsuyoshi Imai,T. Mutoh +19 more
TL;DR: To improve transmission efficiency, information about the wave phase and mode content of high power millimeter-waves propagating in corrugated waveguides, which are difficult to measure directly, were obtained by a newly developed method based on retrieved phase information.
Optimization of high power and high efficiency operation of 77GHz gyrotrons for ECRH in the large helical device
Takashi Shimozuma,H. Takahashi,Satoshi Ito,Sakuji Kobayashi,S. Kubo,Y. Yoshimura,H. Igami,Masaki Nishiura,Shinya Ogasawara,Ryohei Makino,Yoshinori Mizuno,Kohta Okada,Y. Takita,Y. Ito,T. Mutoh,R. Minami,Tsuyoshi Kariya,Tsuyoshi Imai +17 more
- 15 Dec 2011
TL;DR: In this article, three Mega-Watt 77GHz gyrotrons were developed for an ECRH system in LHD and their operation could be highly optimized by means of two-step rise of an anode voltage.
11
Progress of a multi-megawatt gyrotron system for Electron Cyclotron heating on the Large Helical Device
Takashi Shimozuma,S. Kubo,Y. Yoshimura,H. Igami,H. Takahashi,Sakuji Kobayashi,Satoshi Ito,Yoshinori Mizuno,Kohta Okada,Y. Takita,T. Mutoh,Hiroshi Idei,R. Minami,Tsuyoshi Kariya,Tsuyoshi Imai +14 more
- 30 Nov 2010
TL;DR: In this article, a position and profile monitor of the mmw-beams in evacuated transmission lines is developed for stable operation, and a new ECH system for fusion-relevant plasma heating has been greatly progressed with the development of megawatt gyrotrons.
10
Mode-content analysis and field reconstruction of propagating waves in corrugated Waveguides of an ECH system
Takashi Shimozuma,Hiroshi Idei,Michael A. Shapiro,Richard J. Temkin,S. Kubo,H. Igami,Y. Yoshimura,H. Takahashi,Satoshi Ito,Sakuji Kobayashi,Yoshinori Mizuno,Y. Takita,T. Mutoh +12 more
TL;DR: In this article, the mode content of high power electromagnetic waves that are propagating through corrugated waveguides in the electron cyclotron resonance heating (ECH) systems for nuclear fusion devices was analyzed.