Test particle simulation of non-ambipolar ion diffusion in Tokamaks

Timo Kiviniemi (Corresponding Author), Jukka Heikkinen, A. Peeters

Research output: Contribution to journalArticleScientificpeer-review

8 Citations (Scopus)

Abstract

The neoclassical return current and parallel viscosity due to the radial electric field (non-equilibrium poloidal rotation) in tokamaks are calculated using the 5-D (3-D in configuration space and 2-D in velocity space) Monte Carlo code ASCOT. Results are compared with the known neoclassical non-ambipolar return current expressions by Shaing [Phys. Fluids B 2 (1990) 2847] and Stringer [Nucl. Fusion 33 (1993) 1249] over a wide range of poloidal Mach numbers Mp = Er/(vtiBθ) and for various collisionalities. Here, vti is the ion thermal velocity, Er is the radial electric field and Bθ is the poloidal magnetic field. Quantitative differences exist due to a simpler collision operator and the various other approximations used in deriving the analytic expressions.

Original languageEnglish
Pages (from-to)1587 - 1596
Number of pages10
JournalNuclear Fusion
Volume40
Issue number9
DOIs
Publication statusPublished - 2000
MoE publication typeA1 Journal article-refereed

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stringers
electric fields
Mach number
ions
simulation
fusion
viscosity
operators
collisions
fluids
configurations
approximation
magnetic fields

Cite this

Kiviniemi, Timo ; Heikkinen, Jukka ; Peeters, A. / Test particle simulation of non-ambipolar ion diffusion in Tokamaks. In: Nuclear Fusion. 2000 ; Vol. 40, No. 9. pp. 1587 - 1596.
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Kiviniemi, T, Heikkinen, J & Peeters, A 2000, 'Test particle simulation of non-ambipolar ion diffusion in Tokamaks', Nuclear Fusion, vol. 40, no. 9, pp. 1587 - 1596. https://doi.org/10.1088/0029-5515/40/9/303

Test particle simulation of non-ambipolar ion diffusion in Tokamaks. / Kiviniemi, Timo (Corresponding Author); Heikkinen, Jukka; Peeters, A.

In: Nuclear Fusion, Vol. 40, No. 9, 2000, p. 1587 - 1596.

Research output: Contribution to journalArticleScientificpeer-review

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AU - Heikkinen, Jukka

AU - Peeters, A.

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