A density rise experiment on PLT

Strachan S. Munakata, N. Bretz, E. Mazzucato, C. W. Barnes, D. Boyd, S. A. Cohen, J. Hovey, R. Kaita, S. S. Medley, G. Schmidt, G. Tait, D. Voss

Research output: Contribution to journalArticlepeer-review

62 Scopus citations


The evolution of the density profile in PLT during intense gas puffing is documented and analysed. Measurements of the spectrum of low-energy edge neutrals and of the change in central neutral density, indicate that charge-exchange processes alone cannot account for the central density rise. The transient density profile changes can be reproduced numerically by a diffusivity of of - 104cm2. s-1and a spatially averaged inward flow of 103cm.s-1. These transport coefficients are 10-102times larger than neoclassical. The ion energy confinement is reduced, the small-scale density fluctuations are increased, and runaway electron losses are increased during the density rise.

Original languageEnglish (US)
Pages (from-to)1145-1159
Number of pages15
JournalNuclear Fusion
Issue number9
StatePublished - Sep 1982

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics
  • Condensed Matter Physics


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