A slow-wave heating experiment on RFC-XX using an array of phased antennas

T. Watari, K. Adati, Takashi Aoki, S. Hidekuma, Katsumi Hattori, S. Hiroe, M. Ichimura, T. Kawamoto, R. Kumazawa, Y. Okubo,

Nuclear Fusion · 1982 · 37 citations · 6 references

Concepts

Abstract

Experimental data for ion cyclotron resonance heating in the RFC-XX machine in IPP-Nagoya are presented. The achieved ion temperature is as high as 100 eV at n = 1013 cm−3 and 1 keV at n = 1012 cm−3. The ion energy confinement becomes worse by the application of a longer pulse, which is found to be due to the enhanced charge-exchange loss and/or electron drag. Axially and azimuthally arrayed antennas are used in the heating, and the importance of the phasing is demonstrated. A simple model of the multiple-antenna problem is also given and used to interpret the experimental data.

References

6