Extended neoclassical transport theory for incompressible tokamak plasmas

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

Conventional neoclassical transport theory is extended to include the effects of orbit squeezing, and to allow the effective poloidal Mach number UpM=[(V/vt) + (VEB/vtBp)] of the order of unity for incompressible tokamak plasmas. Here, V is the parallel mass flow, vt is the ion thermal speed, VE is the poloidal E×B drift speed, B is the magnetic field strength, and Bp is the poloidal magnetic field strength. It is found that ion thermal conductivity is reduced from its conventional neoclassical value in both banana and plateau regimes if UpM> 1 and S>1. Here, S=[1+cI2Φ″/(Ω0B0)] is the orbit squeezing factor with c the speed of light, I=RBt, R the major radius, Φ the electrostatic potential, B0 the magnetic field strength on the axis, Ω0=eB0/Mc, M the ion mass, e the ion charge, Φ″=d2Φ/dψ2, and ψ the poloidal flux function. However, there is an irreducible minimum for the ion thermal conductivity in the banana-plateau regime set by the conventional Pfirsch-Schlüter transport.

Original languageEnglish
Pages (from-to)3320-3322
Number of pages3
JournalPhysics of Plasmas
Volume4
Issue number9
DOIs
Publication statusPublished - 1997 Jan 1

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics

Fingerprint Dive into the research topics of 'Extended neoclassical transport theory for incompressible tokamak plasmas'. Together they form a unique fingerprint.

  • Cite this