Effects of ECRH power and safety factor on laser blow-off injected impurity confinement in TCV

E. Scavino, J. Bakos, H. Weisen

Research output: Contribution to journalArticle

22 Citations (Scopus)

Abstract

Evidence from injection into the TCV device of laser ablated, non-recycling silicon impurities shows that the transport of impurities confinement can be remarkably different from that of energy. The ratio of impurity to energy confinement times ranges from near unity in Ohmic discharges to 5 in the presence of high power ECCD. In Ohmic discharges in deuterium, above a threshold of density and of safety factor near q95 = 4.5, the impurity confinement time increases abruptly by a factor of 2 and is sometimes accompanied by indefinite retention of non-recycling impurities within the sawtooth mixing radius.

Original languageEnglish
Pages (from-to)857-868
Number of pages12
JournalPlasma Physics and Controlled Fusion
Volume46
Issue number5
DOIs
Publication statusPublished - May 2004

ASJC Scopus subject areas

  • Nuclear Energy and Engineering
  • Condensed Matter Physics

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