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Study of collisionless high-energy charged particle losses for stellarators in presence of resonant perturbations of the magnetic field

Part of: Focus on Fusion PLA Tribute to V D Shafranov: 1929-2014

Published online by Cambridge University Press:  13 January 2016

V. V. Nemov ,
S. V. Kasilov ,
W. Kernbichler  and
V. N. Kalyuzhnyj
V. V. Nemov*
Affiliation:
Institute of Plasma Physics, National Science Center ‘Kharkov Institute of Physics and Technology’, Akademicheskaya str. 1, 61108 Kharkov, Ukraine Institut für Theoretische Physik – Computational Physics, Technische Universität Graz, Fusion@ÖAW, Petersgasse 16, A-8010 Graz, Austria
S. V. Kasilov
Affiliation:
Institute of Plasma Physics, National Science Center ‘Kharkov Institute of Physics and Technology’, Akademicheskaya str. 1, 61108 Kharkov, Ukraine Institut für Theoretische Physik – Computational Physics, Technische Universität Graz, Fusion@ÖAW, Petersgasse 16, A-8010 Graz, Austria
W. Kernbichler
Affiliation:
Institut für Theoretische Physik – Computational Physics, Technische Universität Graz, Fusion@ÖAW, Petersgasse 16, A-8010 Graz, Austria
V. N. Kalyuzhnyj
Affiliation:
Institute of Plasma Physics, National Science Center ‘Kharkov Institute of Physics and Technology’, Akademicheskaya str. 1, 61108 Kharkov, Ukraine
*
†Email address for correspondence: nemov@ipp.kharkov.ua
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Abstract

Using a numerical code based on guiding centre drift equations, collisionless high energy particle losses, and in particular ${\it\alpha}$-particle losses, are studied for a number of stellarator configurations in the presence of magnetic islands caused by resonant perturbations of magnetic surfaces. Standard stellarator configurations, as well as an optimized quasi-helically symmetric stellarator, are used in this study. It is found that the role of islands in collisionless ${\it\alpha}$-particle losses is practically negligible for standard stellarators, however, for optimized stellarators, islands can have a negative impact.

Type
Research Article
Information
Journal of Plasma Physics , Volume 82 , Issue 1 , February 2016 , 515820101
Copyright
© EUROfusion Consortium Research Institutions 2016 

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