This title appears in the Scientific Report :
2006
Please use the identifier:
http://hdl.handle.net/2128/1911 in citations.
Please use the identifier: http://dx.doi.org/10.1088/0029-5515/46/11/008 in citations.
Influence of stochastic magnetic fields on relativistic electrons
Influence of stochastic magnetic fields on relativistic electrons
The relativistic motion of test particles in stochastic magnetic fields is investigated. Guiding-centre motion is analysed in relativistic invariant form for toroidal geometry. Including stochastic magnetic field components, a symmetric Hamiltonian mapping technique, leading to a 4-dimensional itera...
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Personal Name(s): | Wingen, S. |
---|---|
Abdullaev, S. S. / Finken, K. H. / Spatschek, K. H. | |
Contributing Institute: |
Institut für Plasmaphysik; IPP |
Published in: | Nuclear fusion, 46 (2006) S. 941 - 952 |
Imprint: |
Vienna
IAEA
2006
|
Physical Description: |
941 - 952 |
DOI: |
10.1088/0029-5515/46/11/008 |
Document Type: |
Journal Article |
Research Program: |
Fusion |
Series Title: |
Nuclear Fusion
46 |
Subject (ZB): | |
Link: |
OpenAccess |
Publikationsportal JuSER |
Please use the identifier: http://dx.doi.org/10.1088/0029-5515/46/11/008 in citations.
The relativistic motion of test particles in stochastic magnetic fields is investigated. Guiding-centre motion is analysed in relativistic invariant form for toroidal geometry. Including stochastic magnetic field components, a symmetric Hamiltonian mapping technique, leading to a 4-dimensional iteration procedure, is developed. In general, an external electric field and a time-dependence of the magnetic field perturbations are allowed for. Break-up of drift surfaces is demonstrated via Poincare plots. The latter are analysed in detail for increasing (relativistic) kinetic energies of the particles. The dependence of the escape rates on the kinetic energy is calculated and compared with the escape rates for field lines. The non-relativistic limit of the model is derived. Quantitative results for the magnetic perturbations in a dynamic ergodic divertor of the TEXTOR experiment are shown, and predictions for runaway electrons are compared with experiments. |