Modeling of neutral hydrogen velocities in the tokamak fusion test reactor

D. P. Stotler, C. H. Skinner, R. V. Budny, A. T. Ramsey, D. N. Ruzic, R. B. Turkot

Research output: Contribution to journalArticlepeer-review


Monte Carlo neutral transport simulations of hydrogen velocities in the Tokamak Fusion Test Reactor (TFTR) [K. M. McGuire et al., Phys. Plasmas 2, 2176 (1995)] are compared with experiment using the Doppler-broadened Balmer-α spectral line profile. Good agreement is obtained under a range of conditions, validating the treatment of charge exchange, molecular dissociation, surface reflection, and sputtering in the neutral gas code DEGAS [D. Heifetz et al., J. Comput. Phys. 46, 309 (1982)]. A residual deficiency of 10-100 eV neutrals in most of the simulations indicates that further study of the energetics of H2+ dissociation for electron energies in excess of 100 eV is needed.

Original languageEnglish (US)
Pages (from-to)4084-4094
Number of pages11
JournalPhysics of Plasmas
Issue number11
StatePublished - 1996

ASJC Scopus subject areas

  • Condensed Matter Physics


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