Ion collisionality and L-H transition in tokamaks

K. C. Shaing, P. J. Christenson

Research output: Contribution to journalArticlepeer-review

14 Citations (Scopus)


When the previous H-mode theory [K. C. Shaing and E. C. Crume, Jr., Phys. Rev. Lett. 63, 2369 (1989)] is extended to include a bi-Maxwellian ion distribution with both cold and hot ion components to model the effects of the non-Maxwellian distribution, the collisionality of the cold ions ν*ic becomes an irrelevant bifurcation parameter, as it is for the electrode-induced H mode. Thus, the observation that the L-H transition can occur even when ν*ic≫1 is consistent with the fundamental physics of the ion orbit loss model, including a hot ion component.

Original languageEnglish
Pages (from-to)666-668
Number of pages3
JournalPhysics of Fluids B
Issue number3
Publication statusPublished - 1993 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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