This title appears in the Scientific Report :
2003
Please use the identifier:
http://dx.doi.org/10.1016/S0022-3115(02)01455-1 in citations.
Density limits in helium plasmas at JET
Density limits in helium plasmas at JET
Recently at JET a pure helium campaign has been performed. The exploration of the density limit in L-mode limiter as well as L-mode and H-mode diverted plasmas was one of the main objectives. In L-mode plasmas the density can be increased until the total radiated power equals the heating power, henc...
Saved in:
Personal Name(s): | Rapp, J. |
---|---|
Huber, A. / Ingesson, L. C. / Jachmich, S. / Matthews, G. F. / Philipps, V. / Pitts, R. | |
Contributing Institute: |
Institut für Plasmaphysik; IPP |
Published in: | Journal of nuclear materials, 313-316 (2003) S. 524 - 529 |
Imprint: |
Amsterdam [u.a.]
Elsevier Science
2003
|
Physical Description: |
524 - 529 |
DOI: |
10.1016/S0022-3115(02)01455-1 |
Document Type: |
Journal Article |
Research Program: |
Kernfusion und Plasmaforschung |
Series Title: |
Journal of Nuclear Materials
313-316 |
Subject (ZB): | |
Publikationsportal JuSER |
Recently at JET a pure helium campaign has been performed. The exploration of the density limit in L-mode limiter as well as L-mode and H-mode diverted plasmas was one of the main objectives. In L-mode plasmas the density can be increased until the total radiated power equals the heating power, hence the density limit is determined by a radiative collapse. When compared to deuterium plasmas the L-mode density limit in helium is twice as high. In H-mode no significant difference in the density limit process has been observed. The pedestal density just before the H to L-mode back transition is the same in deuterium and helium plasmas. The H to L-mode back transition is followed by a development of a MARFE [J. Nucl. Mater. 145-147 (1987) 15] which eventually leads to a density limit disruption. (C) 2003 Elsevier Science B.V. All rights reserved. |