The ambipolar electric field in stellarators

D. E. Hastings, W. A. Houlberg, K. C. Shaing

Research output: Contribution to journalArticlepeer-review

98 Citations (Scopus)


In a three-dimensional device like a stellarator, the ambipolar electric field must be determined self-consistently from the ambipolarity constraint and can have a significant effect on transport through the diffusion coefficients. A differential formulation and an algebraic formulation for the electric field are solved, together with the density and temperature equations. The results are compared, and in both cases multiple electric field solutions can exist, with bifurcations occurring between different solutions. It is shown that heating of the electrons encourages bifurcation to the more favourable positive electric field root.

Original languageEnglish
Pages (from-to)445-454
Number of pages10
JournalNuclear Fusion
Issue number4
Publication statusPublished - 1985 Apr

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics
  • Condensed Matter Physics


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