Role of shielding in modelling cryogenic deuterium pellet ablation

K. Gál, É Belonohy, G. Kocsis, P. T. Lang, G. Veres

Research output: Contribution to journalArticle

19 Citations (Scopus)

Abstract

For the better characterization of pellet ablation, the numerical LLP code has been enhanced by combining two relevant shielding mechanisms: that of the spherically expanding neutral cloud surrounding the pellet and that of the field elongated ionized material forming a channel flow. In contrast to our expectation the presence of the channel flow can increase the ablation rate although it reduces the heat flux travelling through it. The contribution of the different shielding effect in the ablation process is analysed for several pellet and plasma parameters and an ablation rate scaling is presented based on simple regression in the ASDEX Upgrade pellet and plasma parameter range. Finally the simulated results are compared with experimental data from typical ASDEX Upgrade discharges.

Original languageEnglish
Article number085005
JournalNuclear Fusion
Volume48
Issue number8
DOIs
Publication statusPublished - Aug 1 2008

ASJC Scopus subject areas

  • Nuclear and High Energy Physics
  • Condensed Matter Physics

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