1D kinetic modelling of the JET SOL with tungsten divertor

Research output: Contribution to journalArticleScientificpeer-review

Researchers

Research units

  • Culham Science Centre
  • University of Innsbruck

Abstract

In this work a fully kinetic model of the JET SOL with tungsten divertor plates has been developed. It includes the dynamics of main-ions (D+) and electrons, the neutrals (D, C, W) and the impurity particles (C+m, W+n). Our simulations show extremely low concentration of W impurity. We identify two reasons which are responsible for this effect: (1) for low temperature divertor plasma the energy of most of the main-ions and the impurities in a low-ionization state impinging the divertor plates is below the W-sputtering threshold energy; (2) with increasing temperature the W-sputtering increases, but the potential drop across the divertor plasma increases too, so that most of the W ions are reabsorbed at the divertors.

Details

Original languageEnglish
Pages (from-to)522-525
Number of pages4
JournalJournal of Nuclear Materials
Volume438
Issue numberSupplement
Publication statusPublished - Jul 2013
MoE publication typeA1 Journal article-refereed

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