A profile constraint and the value of beta in tokamak experiments

S.E. Segre, V. Zanza

Research output: Contribution to journalArticle

3 Citations (Scopus)


The profile constraint, resulting from the poloidal Ohm's law, is used to derive a relationship between the normalized energy content (toroidal beta) and the normalized plasma current (1/q) for tokamak discharges. This relationship depends on the plasma fuelling, (gas puffing and neutral beam injection are considered) and is independent of energy balance. Good agreement is found with a wide range of experiments, both gas fuelled and neutral beam fuelled, when use is made of the extended neoclassical theory (which assumes an anomalous electron-electron collision rate but a Coulomb electron-iron collision rate).
Original languageEnglish
Article number002
Pages (from-to)1619 - 1637
Number of pages19
JournalPlasma Physics and Controlled Fusion
Issue number11
Publication statusPublished - 1992
Externally publishedYes


All Science Journal Classification (ASJC) codes

  • Nuclear Energy and Engineering
  • Condensed Matter Physics

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