EFD-C(13)02/04 Overview of LH Experiments in JET with an ITER-Like Wall
| Main Authors: | K.K. Kirov, Yu. Baranov, E. Barbato, M. Brix, G. Corrigan, A. Ekedahl, M. Goniche, J. Mailloux, V. Petrzilka, F. Rimini, M. Stamp, JET EFDA contributors |
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| Format: | Proceeding Journal |
| Terbitan: |
, 2013
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| Online Access: |
https://zenodo.org/record/12080 |
Daftar Isi:
- An overview of the recent results of Lower Hybrid (LH) experiments at JET with the ITER-like wall (ILW) is presented. Topics relevant to LH wave coupling are addressed as well as issues related to ILW and LH system protections. LH wave coupling was studied in conditions determined by ILW recycling and operational constraints. It was concluded that LH wave coupling was not significantly affected and the pre-ILW performance could be recovered after optimising the launcher position and local gas puffing. SOL density measurements were performed using a Li-beam diagnostic. Dependencies on the D2 injection rate from the dedicated gas valve, the LH power and the LH launcher position were analysed. SOL density modifications due to LH were modelled by the EDGE2D code assuming SOL heating by collisional dissipation of the LH wave and/or possible E¥B drifts in the SOL. The simulations matched reasonably well the measured SOL profiles. Observations of arcs and hotspots with visible and IR cameras viewing the LH launcher are presented.
- Preprint of Paper to be submitted for publication in Proceedings of the 20th Topical Conference on Radio Frequency Power in Plasmas, Sorrento, Italy. 25th June 2013 - 28th June 2013