Plasma-materials interactions during RF experiments in tokamaks

S. A. Cohen, S. Bernabei, R. Budny, T. K. Chu, P. Colestock, E. Hinnov, W. Hooke, J. Hosea, D. Hwang, F. Jobes, D. Manos, R. Motley, D. Ruzic, J. Stevens, B. Stratton, S. Suckewer, S. Von Goeler, R. Wilson

Research output: Contribution to journalArticle

27 Scopus citations

Abstract

Plasma-materials interactions studied in recent ICRF heating and lower hybrid current drive experiments are reviewed. The microscopic processes responsible for impurity generation are discussed. In ICRF experiments, improvements in machine operation and in antenna and feedthrough design have allowed efficient plasma heating at RF powers up to 3 MW. No significant loss of energy from the plasma core due to impurity radiation occurs. Lower hybrid current drive results in the generation and maintenance of hundreds of kiloamperes of plasma current carried by suprathermal electrons. The loss of these electrons and their role in impurity generation are assessed. Methods to avoid this problem are evaluated.

Original languageEnglish (US)
Pages (from-to)280-291
Number of pages12
JournalJournal of Nuclear Materials
Volume128-129
Issue numberC
DOIs
StatePublished - Dec 1984

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics
  • Materials Science(all)
  • Nuclear Energy and Engineering

Keywords

  • ICRF
  • LH
  • PWI

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    Cohen, S. A., Bernabei, S., Budny, R., Chu, T. K., Colestock, P., Hinnov, E., Hooke, W., Hosea, J., Hwang, D., Jobes, F., Manos, D., Motley, R., Ruzic, D., Stevens, J., Stratton, B., Suckewer, S., Von Goeler, S., & Wilson, R. (1984). Plasma-materials interactions during RF experiments in tokamaks. Journal of Nuclear Materials, 128-129(C), 280-291. https://doi.org/10.1016/0022-3115(84)90367-2