High energy and particle confinement times in PDX scoop discharges

R. Budny, K. Bol, R. Fonck, R. Goldston, B. Grek, W. Heidbrink, D. Heifetz, D. Johnson, R. Kaita, S. Kaye, H. Kugel, D. Manos, D. Mccune, D. Mikkelsen, K. Owens, D. Post, M. Redi, C. Singer, J. Strachan

Research output: Contribution to journalArticlepeer-review


Scoop limited discharges in PDX with neutral beam heating achieved energy and particle confinement times higher than those inferred from similar poloidal rail limiter discharges. We present transport simulations using TRANSP and BALDUR and neutral simulations using DEGAS. Large neutral densities and ionization rates localized near the scoop are inferred. Thermal neutral ionization increases the edge electron density substantially, resulting in a flattened density profile. Fueling from the scoop limiter is deeper than from simple limiters.

Original languageEnglish (US)
Pages (from-to)425-429
Number of pages5
JournalJournal of Nuclear Materials
Issue numberC
StatePublished - Dec 1984
Externally publishedYes


  • energy confinement
  • particle confinement
  • pump limiter
  • scoop limiter
  • transport simulation

ASJC Scopus subject areas

  • Nuclear and High Energy Physics
  • General Materials Science
  • Nuclear Energy and Engineering


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