Three-Dimensional Analysis of ICRF Wave Excitation on the GAMMA 10 Central Cell

نویسندگان

  • Y. YAMAGUCHI
  • M. ICHIMURA
  • A. FUKUYAMA
  • H. HOJO
  • S. SATO
  • T. MURAKAMI
  • Y. IMAI
  • T. YOKOYAMA
  • Y. MIYAKE
چکیده

A three-dimensional full-wave code is newly employed to investigate the plasma production by Ion-Cyclotron Range of Frequency (ICRF) waves on GAMMA 10. The spatial structure of the excited wave fields are calculated for two types of ICRF antennas (Double Half-Turn and Nagoya Type-III) in the central cell. The plasma production by ICRF waves depends on the wave excitation in the plasma. Eigenmodes are strongly formed when the boundary conditions are satisfied. In the experiment, the saturation of the plasma density is observed when Nagoya Type-III antenna is used for the plasma production. On the other hand, remarkable increase in the plasma density has been obtained by controlling the phase difference between Double Half-Turn and Nagoya Type-III antennas. The spatial structure of the wave field is calculated, and the antenna-plasma coupling is evaluated. It is predicted that Double Half-Turn antenna strongly couples to the eigenmode, and therefore produces the higher density plasmas in the central cell.

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تاریخ انتشار 2009