Transport simulations of helium exhaust in iter using recent data from tftr, textor and jt-60

M. H. Redi, S. A. Cohen, E. J. Synakowski

Research output: Contribution to journalArticle

17 Scopus citations

Abstract

Insufficient helium exhaust can seriously degrade the performance of any fusion reactor and has recently been identified as a potentially significant issue for the International Thermonuclear Experimental Reactor (ITER). The effects of variations of the ratios DHei, DHe/DD and vHe/DHe and of the sawtooth period on helium exhaust in ITER have been studied with BALDUR code transport simulations. Recent measurements of DHei in TFTR, of DHe/DD in TEXTOR and of vHe/DHe in TFTR, TEXTOR and JT-60 are found to be compatible with the requirements of sustained ignition and helium exhaust for ITER. Ignition is found to be critically sensitive to the ratio vHe/DHe, particularly at the plasma edge, and to a reduced sawtooth period. These critical dependences are moderated for reduced helium recycling at the separatrix and for hollow particle diffusivity profiles.

Original languageEnglish (US)
Pages (from-to)1689-1694
Number of pages6
JournalNuclear Fusion
Volume31
Issue number9
DOIs
StatePublished - Sep 1991

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics
  • Condensed Matter Physics

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