Zobrazeno 1 - 6 of 6 pro vyhledávání: '"Keishun NAKAMURA"'
1
Characteristics of a novel lower hybrid wave antenna for the TST-2 spherical tokamak
Autor: K. Imamura, S. Tsuda, Naoto Tsujii, C.P. Moeller, M. Sonehara, H. Togashi, H. Furui, A. Nakanishi, Takahiro Shinya, Akira Ejiri, Keishun Nakamura, Toshikazu Yamaguchi, Yuichi Takase, Junichi Hiratsuka, Hidetoshi Kakuda, Takuya Oosako, T. Inada, T. Wakatsuki
Publikováno v: AIP Conference Proceedings.
A new type of traveling wave antenna which excites the lower hybrid wave directly was developed. This antenna is similar to the inductively-coupled combline antenna in that only the first element of the antenna array is excited externally, and subseq
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::3c1b0b20b08d2650dbd291dfe2bfd9b8
https://doi.org/10.1063/1.4864588
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3
Identification of Waves by RF Magnetic Probes during Lower Hybrid Wave Injection Experiments on the TST-2 Spherical Tokamak
Autor: Tetsuo Seki, M. Sonehara, A. Nakanishi, H. Furui, Takashi Yamaguchi, Keishun Nakamura, H. Togashi, Osamu Watanabe, Akira Ejiri, Takuma Yamada, S. Tsuda, Takuma Wakatsuki, K. Imamura, Yoshihiko Nagashima, Hiroshi Kasahara, Yuichi Takase, Takahiro Shinya, Hidetoshi Kakuda, T. Inada, Kenji Saito, Fujio Shimpo, Naoto Tsujii, Junichi Hiratsuka, Takuya Oosako
Publikováno v: Plasma and Fusion Research. 9(Special Issue 2):3402040
RF magnetic probes can be used to measure not only the wavevector, but also the polarization of waves in plasmas. A 5-channel RF magnetic probe (5ch-RFMP) was installed in the TST-2 spherical tokamak and the waves were studied in detail during lower
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d831fadbdc76963bc3bd34a97235d76a
http://hdl.handle.net/10655/00013418
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4
Injection and Confinement of a Laser Pulse in an Optical Cavity for Multi-Pass Thomson Scattering Diagnostics in the TST-2 Spherical Tokamak Device
Autor: Hiro TOGASHI, Akira EJIRI, Makoto HASEGAWA, Junichi HIRATSUKA, Yoshihiko NAGASHIMA, Keishun NAKAMURA, Kazumichi NARIHARA, Yuichi TAKASE, Hiroshi TOJO, Naoto TSUJII, Ichihiro YAMADA, Takashi YAMAGUCHI, null the TST-2 Team
Publikováno v: Plasma and Fusion Research. 9:1202005
A multi-pass Thomson scattering (TS) system based on confining laser pulses in an optical cavity was constructed for measuring very low-density plasma in the TST-2 spherical tokamak device. This paper describes the setup of the optical system, inject
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::bd092c941530f82b60590621bf332d84
http://hdl.handle.net/10655/00013438
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5
Plasma Density Suppression by Electron Cyclotron Wave in Lower Hybrid Wave Driven TST-2 Spherical Tokamak Plasma
Autor: Takashi Yamaguchi, H. Togashi, M. Sonehara, A. Nakanishi, Charles P. Moeller, Akira Ejiri, Takahiro Shinya, T. Inada, K. Imamura, Takuya Oosako, Junichi Hiratsuka, Yuichi Takase, Naoto Tsujii, Hidetoshi Kakuda, S. Tsuda, Takuma Wakatsuki, H. Furui, Keishun Nakamura
Publikováno v: Plasma and Fusion Research. 9:1202133-1202133
For successful plasma current (Ip) ramp-up by the lower hybrid wave (LHW), the plasma density must be kept at a low level. In the TST-2 Ip ramp-up experiment using the LHW, the application of the electron cyclotron wave (ECW) was found to reduce the
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::859849dd7d68f699ea98f88bc51a5041
https://doi.org/10.1585/pfr.9.1202133
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