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Confinement and edge studies towards low ρ* and ν* at JET

Author
Abstract

The size and capability of JET to reach high plasma current and field enables a study of the plasma behaviour at ion Larmor radius and collisionality values approaching those of ITER. In this paper such study is presented. The achievement of stationary type I ELMy H-modes at high current proved to be quite challenging. As the plasma current was increased, it became more difficult to achieve stationary conditions. Nevertheless, it was possible to achieve stable operation at high plasma current (up to 4.5 MA) and low q 95 (2.65–3) at JET. One of the main reasons to revisit the high plasma current experiments done in 1997 is the higher power available and the improvement of the pedestal diagnostics. Indeed, compared with previous results, higher stored energy was achieved but confinement was still degraded. The causes of this confinement degradation are discussed in the paper.

Year of Publication
2013
Journal
Nuclear Fusion
Volume
53
Number
7
Number of Pages
073020
URL
http://www.euro-fusionscipub.org/wp-content/uploads/2014/11/EFDP12052.pdf
DOI
10.1088/0029-5515/53/7/073020
PId
d22634a34b4738abab689b664e7b3ea9
Alternate Journal
Nucl. Fusion
Label
OA
Journal Article
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