Wave-particle interaction model for tail ion acceleration in reversed field pinch plasmas

S. Costa, R. Paccagnella, F. Pegoraro, M. Viterbo

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Abstract

In the reversed field pinch plasmas produced by the reversed field experiment (RFX), neutral particle measurements reveal the presence in the radial direction of a small population of non-thermal energetic ions (E = 103eV to 8×103eV). In this work supra-thermal electrons at the plasma edge are considered to be the free-energy source for the ion acceleration. Fast electrons, moving in the same direction of the main magnetic field, excite an ω to approximately ω-pi$/ electrostatic wave which gives energy to the ions which are accelerated in the direction perpendicular to the local equilibrium magnetic field. The theoretical predictions for the neutral particle fluxes are in agreement with the experimental measurements. Moreover, a correlation between the experimental fast-ion and fast-electron energy densities has been found.
Original languageEnglish
Pages (from-to)1485 - 1496
Number of pages12
JournalPlasma Physics and Controlled Fusion
Volume41
Issue number12
DOIs
Publication statusPublished - Dec 1999
Externally publishedYes

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All Science Journal Classification (ASJC) codes

  • Nuclear Energy and Engineering
  • Condensed Matter Physics

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