Channeling of fusion alpha-particle power using minority ion catalysis

A. I. Zhmoginov, N. J. Fisch

Research output: Contribution to journalArticle

8 Scopus citations

Abstract

Maintaining fuel ions hotter than electrons would greatly facilitate controlled nuclear fusion. The parameter range for achieving this temperature disparity is shown here to be enhanced by catalyzing the α-channeling effect (wave-induced simultaneous expulsion and cooling of α particles) through minority-ion heating. Specifically, a wave can extract energy from hot α particles and transfer it to colder minority ions, which act as a catalyst, eventually forwarding the energy to still colder fuel ions through collisions. In comparison with the traditional α-channeling mechanism, the requirements are thereby relaxed on the waves that accomplish the α channeling, which no longer have to interact simultaneously with α particles and fuel ions. Numerical simulations illustrate how the new scheme may increase, for example, the effective fusion reactivity of mirror-confined plasmas.

Original languageEnglish (US)
Article number175001
JournalPhysical review letters
Volume107
Issue number17
DOIs
StatePublished - Oct 17 2011

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

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