This title appears in the Scientific Report :
2005
Please use the identifier:
http://dx.doi.org/10.1088/0029-5515/45/5/001 in citations.
Please use the identifier: http://hdl.handle.net/2128/1895 in citations.
Characterisation of small ELM experiments in highly shaphed single null and quasi-double null plasmas in JET
Characterisation of small ELM experiments in highly shaphed single null and quasi-double null plasmas in JET
This paper describes experiments with highly shaped JET H-mode plasmas, which were directed to developing regimes where Type I ELMs are replaced by other edge relaxations, while maintaining the pedestal pressure of Type I ELMy H-modes. It was found that Type II ELMs coexisted with Type I, up to dens...
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Personal Name(s): | Saibene, G. |
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Sartori, R. / Loarte, A. / Lomas, P. J. / Parail, V. / Zastrow, K. D. / Andrew, Y. / Sharapov, S. / Korotkov, J. M. / McDonald, D. C. / Günther, K. / Meigs, A. G. / Arshad, S. A. / Bécoulet, M. / Thomas, P. R. / Monier-Garbet, M. / Rimini, F. G. / Koslowski, H. R. / Perez, C. P. / Stober, J. / Conway, G. D. / Kempenaars, M. A. H. / Ingesson, L. C. / Lönnroth, J. S. | |
Contributing Institute: |
Institut für Plasmaphysik; IPP |
Published in: | Nuclear fusion, 45 (2005) S. 297 - 317 |
Imprint: |
Vienna
IAEA
2005
|
Physical Description: |
297 - 317 |
DOI: |
10.1088/0029-5515/45/5/001 |
Document Type: |
Journal Article |
Research Program: |
Kernfusion und Plasmaforschung |
Series Title: |
Nuclear Fusion
45 |
Subject (ZB): | |
Link: |
Get full text OpenAccess |
Publikationsportal JuSER |
Please use the identifier: http://hdl.handle.net/2128/1895 in citations.
This paper describes experiments with highly shaped JET H-mode plasmas, which were directed to developing regimes where Type I ELMs are replaced by other edge relaxations, while maintaining the pedestal pressure of Type I ELMy H-modes. It was found that Type II ELMs coexisted with Type I, up to densities of the order of the Greenwald limit, where Type III ELMs appear, and the good confinement was lost. Only at the highest edge collisionality was it observed that Type II ELMs completely replace Type I. At high beta(p) and q(95), 'grassy' ELMs replace Type I completely. The MHD spectra characteristics for grassy ELMs are significantly different from those of Type II ELMs. This paper details the experiments, briefly compares the results to those obtained elsewhere and suggests open lines of investigations for the assessment of the potential of grassy ELM regimes as an ELM mitigation technique. |