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Hybrid code investigation of the physics of multi-species plasma blobs in magnetic fields
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Gingell, Peter W., Chapman, Sandra C., Dendy, R. O. and Brady, Christopher S. (2011) Hybrid code investigation of the physics of multi-species plasma blobs in magnetic fields. In: 38th EPS Conference on Plasma Physics 2011, EPS 2011, Strasbourg, France, 27 June - 1 July 2011. Published in: 38th EPS Conference on Plasma Physics 2011, EPS 2011 - Europhysics Conference Abstracts, Volume 35 (Number 1). pp. 1-4. ISBN 978-161839593-1. ISSN 0378-2271.
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Abstract
Strongly localised concentrations or depressions of plasma density and temperature ("blobs") together with magnetic field density are ubiquitous in fusion experiments and in space. For example, the outward flux of energy and particles in the edge region of tokamaks often incorporates a substantial population of moving blobs. In many of these contexts, the ratio of characteristic blob lengthscales to ion orbit lengthscales is not large enough for the approximations underlying fluid or guiding centre models of plasmas to be relied upon. In the cases examined in this paper, for example, the ion Larmor radius can be comparable to the size of a plasma blob and can exceed the lengthscales which characterise the gradients of density, temperature, or magnetic field near the boundary of a blob. First principles understanding of the evolving internal and external structure of plasma blobs, and of the interplay between internal and external forces and blob dynamics, is desirable. Here we address these questions using a hybrid code in two spatial dimensions perpendicular to the magnetic field B. The code couples fluid equations for the plasma electrons to a fully kinetic, particle-in-cell treatment of the ions.
| Item Type: | Conference Item (Paper) | ||||
|---|---|---|---|---|---|
| Divisions: | Faculty of Science, Engineering and Medicine > Science > Physics Faculty of Science, Engineering and Medicine > Science > Centre for Scientific Computing |
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| Journal or Publication Title: | 38th EPS Conference on Plasma Physics 2011, EPS 2011 - Europhysics Conference Abstracts | ||||
| Publisher: | European Physical Society | ||||
| ISBN: | 978-161839593-1 | ||||
| ISSN: | 0378-2271 | ||||
| Official Date: | 2011 | ||||
| Dates: |
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| Volume: | Volume 35 | ||||
| Number: | Number 1 | ||||
| Page Range: | pp. 1-4 | ||||
| Status: | Peer Reviewed | ||||
| Publication Status: | Published | ||||
| Access rights to Published version: | Restricted or Subscription Access | ||||
| Conference Paper Type: | Paper | ||||
| Title of Event: | 38th EPS Conference on Plasma Physics 2011, EPS 2011 | ||||
| Type of Event: | Conference | ||||
| Location of Event: | Strasbourg, France | ||||
| Date(s) of Event: | 27 June - 1 July 2011 | ||||
| Related URLs: |
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