Study of pellet-plasma interaction in the GAMMA 10 tandem mirror

E. Kawamori, T. Tamano, Y. Nakashima, M. Yoshikawa, S. Kobayashi, Y. Watanabe, H. Aminaka, T. Cho, K. Ishii, A. Mase, K. Yatsu

Research output: Contribution to journalConference articlepeer-review

Abstract

In the GAMMA10 tandem mirror, the first pellet injection experiments in open systems have started. The tandem mirror machine is suitable for measuring propagation of pellet-fueled particles along the magnetic field lines. We observed a very low frequency oscillation in various diagnostic signals from the plasmas with a pellet injection. The frequency of the oscillation is a few hundred Hz. It is found that the phase of those is signals change to anti-phase at a certain place. The oscillation continued during plug-ECH for the formation of confining potential and its amplitude decays within a several ms after the end of ECH pulse. Measurements at several locations along the field lines indicates that this oscillation is a standing wave along field lines of plasma density perturbation due to the pellet injection. The wavelength of the oscillation is estimated to be about 6m. The oscillation has mode number n=3.

Original languageEnglish
Pages (from-to)257-260
Number of pages4
JournalFusion Technology
Volume39
Issue number1 T
DOIs
Publication statusPublished - 2001 Jan
EventInternational Conference on Open Magnetic Systems for Plasma Confinement - Tsukuba, Jpn
Duration: 2000 Jul 32000 Jul 6

All Science Journal Classification (ASJC) codes

  • Engineering(all)

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