Hostname: page-component-cd9895bd7-lnqnp Total loading time: 0 Render date: 2024-12-27T14:02:23.028Z Has data issue: false hasContentIssue false
  • English
  • Français

Particle losses due to RF-enhanced pitch-angle scattering into velocity space loss regions

Published online by Cambridge University Press:  13 March 2009

D. Anderson  and
M. Lisak
D. Anderson
Affiliation:
Institute for Electromagnetic Field Theory and Euratom-Serc, Chalmers University of Technology, S-412 96 Göteborg, Sweden
M. Lisak
Affiliation:
Institute for Electromagnetic Field Theory and Euratom-Serc, Chalmers University of Technology, S-412 96 Göteborg, Sweden
Get access Rights & Permissions [Opens in a new window]

Abstract

The application of RF heating (ICRH or LHH) to a fusion plasma creates high-energy tails on the distribution function of the heated particle species. In the presence of loss regions in velocity space, e. g. due to particle drifts in the toroidal magnetic field ripple of a tokamak, the collisional pitch-angle scattering losses may be significantly enhanced. The present work assesses the importance of such RF-enhanced losses and explicit expressions are derived for the evolution of the loss fraction. In particular, for parameters typical of PLT we find that the loss fraction could rapidly reach high values.

Type
Research Article
Information
Journal of Plasma Physics , Volume 32 , Issue 2 , October 1984 , pp. 273 - 281
Copyright
Copyright © Cambridge University Press 1984

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

REFERENCES

Anderson, D. 1984 Physica Scripta, 30, 146.CrossRefGoogle Scholar
Anderson, D. & Lisak, M. 1984 a Phys. Fluids. (To be published.)Google Scholar
Anderson, D. & Lisak, M. 1984 b Phys. Fluids, 27, 925.CrossRefGoogle Scholar
Hwang, D. Q. et al. 1983 Phys. Rev. Lett. 51, 1865.CrossRefGoogle Scholar
Schuss, J. J. et al. 1981 Nucl. Fusion, 21, 427.CrossRefGoogle Scholar
Schuss, J. J., Antonsen, T. M. & Porkolab, M. 1983 Nucl. Fusion, 23, 201.CrossRefGoogle Scholar
Stix, T. H. 1975 Nucl. Fusion, 15, 737.CrossRefGoogle Scholar
Whang, K. W., Morales, G. J. & Fried, B. D. 1980 Proceedings of 2nd Joint Grenoble-Varenna International Symposium on Heating in Toroidal Plasmas, p. 613.Google Scholar