Observation of weak impact of a stochastic magnetic field on fast-ion confinement

G. Fiksel, B. Hudson, D. J. Den Hartog, R. M. Magee, R. O'Connell, S. C. Prager, A. D. Beklemishev, V. I. Davydenko, A. A. Ivanov, Yu A. Tsidulko

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38 Scopus citations


Fast ions are observed to be very well confined in the Madison Symmetric Torus reversed field pinch despite the presence of stochastic magnetic field. The fast-ion energy loss is consistent with the classical slowing down rate, and their confinement time is longer than expected by stochastic estimates. Fast-ion confinement is measured from the decay of d-d neutrons following a short pulse of a 20 keV atomic deuterium beam. Ion confinement agrees with computation of particle trajectories in the stochastic magnetic field, and is understood through consideration of ion guiding center islands.

Original languageEnglish (US)
Article number125001
JournalPhysical review letters
Issue number12
StatePublished - Sep 16 2005

All Science Journal Classification (ASJC) codes

  • General Physics and Astronomy


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