ウエダ　ヨシオ   Ueda Yoshio   上田　良夫    所属   追手門学院大学  理工学部 電気電子工学科    職種   教授
発行・発表の年月	2014/06/01
形態種別	論文
査読	査読あり
標題	Development of steady-state operation using ion cyclotron heating in the Large Helical Device
執筆形態	共著・編著（代表編著を除く）
掲載誌名	Physics of Plasmas
掲載区分	国内
巻・号・頁	21(6)
著者・共著者	H. Kasahara,T. Seki,K. Saito,R. Seki,R. Kumazawa,Y. Yoshimura,S. Kubo,T. Shimozuma,H. Igami,H. Takahashi,K. Nagasaki,Y. Ueda,M. Tokitani,N. Ashikawa,M. Shoji,T. Wakatsuki,S. Kamio,H. Tsuchiya,S. Yoshimura,N. Tamura,C. Suzuki,H. Yamada,T. Mutoh
概要	Using a handshake shape (HAS) antenna phasing dipole for ion cyclotron heating (ICH), the heating efficiency was higher than that using a previous poloidal array antenna in the Large Helical Device. In order to sustain the dipole operation, real-time feedback for impedance matching and maintaining the same phase and power was adopted during long-pulse discharge. The HAS antenna was designed to reduce parasitic losses associated with energetic particle and radio-frequency (RF) sheath effects by field-aligned current concentration on the midplane. Local hot spots and the inhomogeneity of the diverter heat profile in the toroidal direction were reduced. The long-pulse discharge with an electron density (ne0) of 1 × 1019 m-3, center electron temperature (Te0) of 2.5 keV, a plasma duration time (td) of 19 min, and RF heating power (PRF) of 1 MW was achieved by ICH and electron cyclotron heating. © 2014 AIP Publishing LLC.
DOI	10.1063/1.4884363
ISSN	1070-664X/1089-7674