An estimate of the ion orbit loss rate in tokamaks

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Abstract

The ion orbit loss rate in the edge region of a tokamak is estimated from an orbit-averaged Coulomb collision operator. The mechanism of the ion orbit loss in a tokamak is qualitatively different from that of the electron loss in a mirror machine, because ion orbit loss in a tokamak results from the coupling between the configuration-space diffusion and the velocity-space scattering, while the electron loss in a mirror machine results from the velocity-space scattering. Despite this difference, the magnitudes of the ion orbit loss rate in a tokamak estimated from these two concepts are similar. Because the ion orbit loss flux is related to the plasma viscosity, it represents a loss of poloidal momentum.

Original languageEnglish
Pages (from-to)3310-3315
Number of pages6
JournalPhysics of Fluids B
Volume4
Issue number10
DOIs
Publication statusPublished - 1992 Jan 1

All Science Journal Classification (ASJC) codes

  • Computational Mechanics
  • Condensed Matter Physics
  • Mechanics of Materials
  • Physics and Astronomy(all)
  • Fluid Flow and Transfer Processes

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