Charge-exchange measurements of d-d triton distribution functions in high-power neutral beam heating on JT-60U

F. V. Tchernychev, Y. Kusama, M. Nemoto, A. Morioka, K. Tobita, S. Ishida

Research output: Contribution to journalArticlepeer-review

7 Citations (Scopus)

Abstract

We present the first results of the fusion triton measurements in JT-60U using the MeV energy range neutral particle analyzer (NPA). An energy distribution of slowing-down fusion tritons has been obtained during the experiments of high-power neutral beam injection (NBI). We associate a dominant mechanism of triton neutralization with charge-exchange (CX) on the plasma residual neutral deuterium and on the hydrogen-like carbon impurity ions. To determine a contribution of these processes in triton neutralization the simplified steady-state balance of carbon impurity ions is considered. The spectrum of slowing-down triton is modelled using the analytical solution of the simplified zero-dimensional Fokker-Planck equation. A good agreement between the experiment with the model is demonstrated.

Original languageEnglish
Pages (from-to)1291-1301
Number of pages11
JournalPlasma Physics and Controlled Fusion
Volume41
Issue number10
DOIs
Publication statusPublished - 1999 Oct 1
Externally publishedYes

ASJC Scopus subject areas

  • Nuclear Energy and Engineering
  • Condensed Matter Physics

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