Stability Boundary and Interaction with Confined Plasmas of Alfvén Ion Cyclotron Modes

Motoyuki Nakamura; Makoto Ichimura; Katsuaki Sakata; Masamitsu Oikawa; Yuriko Ohta; Hidekazu Kano; Satoru Tanaka; Soshun Saosaki; Kiyoomi Kadoya; Toshiki Kawabata; Shinji Kobayashi; Hitoshi Hojo; Yousuke Nakashima; Tsuguhiro Watanabe; Kiyoshi Yatsu

doi:dx.doi.org/10.13182/FST01-A11963475

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Stability Boundary and Interaction with Confined Plasmas of Alfvén Ion Cyclotron Modes

Motoyuki Nakamura, Makoto Ichimura, Katsuaki Sakata, Masamitsu Oikawa, Yuriko Ohta, Hidekazu Kano, Satoru Tanaka, Soshun Saosaki, Kiyoomi Kadoya, Toshiki Kawabata, Shinji Kobayashi, Hitoshi Hojo, Yousuke Nakashima, Tsuguhiro Watanabe, Kiyoshi Yatsu

Fusion Science and Technology / Volume 39 / Number 1T / January 2001 / Pages 339-342

Poster Presentations / dx.doi.org/10.13182/FST01-A11963475

Published:February 8, 2018

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In the GAMMA10 tandem mirror, ion cyclotron range of frequency (ICRF) waves are effectively used for the plasma production and heating. Alfvén ion cyclotron (AIC) modes are spontaneously excited due to the strong heating. Stability boundary for the AIC modes is analyzed by introducing the effective mirror ratio. It is shown that the AIC modes become more unstable with smaller mirror ratio. The pitch angle scattering of the high energy ions due to the AIC mode are clearly observed.