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Stochastic (E x B) diffusion of ions in a spatially periodical potential field
KTH, Superseded Departments, Alfvén Laboratory.
2000 (English)In: Physica scripta. T, ISSN 0281-1847, Vol. T84, 221-224 p.Article in journal (Refereed) Published
Abstract [en]

In this contribution, the stochastic (E x B) motion of ions in a homogeneous magnetic field and in a spatially periodical electrostatic potential is discussed. This approach is used for the simulation of ion diffusion in potential structures formed at the boundary plasma in tokamaks. Nonintegrability of the system causes the spatial diffusion of ions. Depending on the choice of parameters, this diffusion has either the usual random-walk character, or appears, for sufficiently strong nonlinearity, in the form of Levy walks. The diffusion coefficient is sufficiently high for heavy impurities. Possible further applications are mentioned.

Place, publisher, year, edition, pages
2000. Vol. T84, 221-224 p.
Identifiers
URN: urn:nbn:se:kth:diva-19697DOI: 10.1238/Physica.Topical.084a00221ISI: 000086560100056OAI: oai:DiVA.org:kth-19697DiVA: diva2:338389
Note
QC 20100525Available from: 2010-08-10 Created: 2010-08-10Bibliographically approved

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