Compact Helical System Physics and Engineering Design

Kiyohiko Nishimura; Keisuke Matsuoka; Masami Fujiwara; Kozo Yamazaki; Jiro Todoroki; Tetsuo Kamimura; Tsuneo Amano; Heiji Sanuki; Shoichi Okamura; Minoru Hosokawa; Hiroshi Yamada; Shugo Tanahashi; Shin Kubo; Yasuyuki Takita; Tatsuo Shoji; Osamu Kaneko; Harukazu Iguchi; Chihiro Takahashi

doi:dx.doi.org/10.13182/FST90-A29173

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Compact Helical System Physics and Engineering Design

Kiyohiko Nishimura, Keisuke Matsuoka, Masami Fujiwara, Kozo Yamazaki, Jiro Todoroki, Tetsuo Kamimura, Tsuneo Amano, Heiji Sanuki, Shoichi Okamura, Minoru Hosokawa, Hiroshi Yamada, Shugo Tanahashi, Shin Kubo, Yasuyuki Takita, Tatsuo Shoji, Osamu Kaneko, Harukazu Iguchi, Chihiro Takahashi

Fusion Science and Technology / Volume 17 / Number 1 / January 1990 / Pages 86-100

Technical Paper / Stellarator System / dx.doi.org/10.13182/FST90-A29173

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The Compact Helical System was designed for research on transport in a low-aspect-ratio helical system. The machine parameters were chosen on the basis of a physics optimization study. Considerable effort was devoted to reducing error fields from current feeds and crossovers. The final machine parameters are as follows: major radius of 1 m; minor radius of the helical field coil of 0.313 m; plasma aspect ratio A_p = 5; pole number and toroidal period number of the helical field coil of l = 2 and m = 8, respectively; and helical pitch modulation of α = 0.3.