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Linear Stability of the Large Larmor Radius Z-pinch
KTH. (Fusionsplasmafysik)ORCID iD: 0000-0001-6379-1880
1994 (English)In: Third International Conference on Dense Z-pinches,  Imperial College, London, 19-23 April 1993, 1994, Vol. 299, p. 75-Conference paper, Oral presentation with published abstract (Refereed)
Abstract [en]

For the first time, calculations of large Larmor radius (LLR) effects on the linear stability of realistic Z-pinch equilibria have been performed. The fixed boundary m=0 instability of the pure Z-pinch (no external magnetic field) is considered (free-boundary and m=1 modes are presently under study). We use the Vlasov-Fluid model, where ions are treated fully kinetically and electrons are modelled as a cold, massless fluid. Stability is found to be remarkably sensitive to equilibrium profiles. A flat current equilibrium is increasingly stabilized (smaller growth rate) by LLR effects as the normalized average Larmor radius ε is increased to about 0.1. Complete stabilization cannot be obtained. For larger values of ε the growth rate increases to reach above the small Larmor radius value when ε~0.3. The Bennett equilibrium, however, is increasingly destabilized as ε increases.

Place, publisher, year, edition, pages
1994. Vol. 299, p. 75-
Series
AIP Conf. Proceedings
National Category
Natural Sciences
Research subject
Physics
Identifiers
URN: urn:nbn:se:kth:diva-240928DOI: 10.1063/1.2949227OAI: oai:DiVA.org:kth-240928DiVA, id: diva2:1275316
Conference
Third International Conference on Dense Z-pinches, Imperial College, London, 19-23 April 1993
Note

QCR 20190128

Available from: 2019-01-05 Created: 2019-01-05 Last updated: 2019-01-28Bibliographically approved

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