LH power losses in front of the JET launcher

P. Jacquet, G. Arnoux, L. Colas, L. Delpech, A. Ekedahl, D. Frigione, M. Goniche, K. Kirov, F. Leguen, J. Mailloux, M.-L. Mayoral, J. Ongena, V. Petrzilka, C. Portafaix, F. Rimini

Research output: Contribution to conferencePaper

5 Citations (Scopus)

Abstract

In recent JET experiments, Lower Hybrid (LH) power losses in the Scrape-Off Layer (SOL) were characterized using infra-red (IR) thermography. Hot spots were observed on objects intercepting the field lines passing in front of the LH launcher, i.e. on poloidal limiters and on dumplates located at the top of the tokamak; their locations being in good agreement with magnetic field line tracing using the EFIT equilibrium code. The dumplate temperature was monitored while scanning the launcher position so that the radial distance between field lines intercepting the hot spots and the launcher was increased up to 3.5 cm. The dissipation layer in front of the launcher was estimated to be at least 3.5 cm wide, in agreement with recent measurements on Tore-Supra, but not with simple models that predict a dissipation layer in the mm range. © 2009 American Institute of Physics.
Original languageEnglish
DOIs
Publication statusPublished - 2009
Externally publishedYes
Event18th Topical Conference on Radio Frequency Power in plasmas - , Belgium
Duration: 1 Jan 2009 → …

Conference

Conference18th Topical Conference on Radio Frequency Power in plasmas
CountryBelgium
Period1/1/09 → …

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All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

Cite this

Jacquet, P., Arnoux, G., Colas, L., Delpech, L., Ekedahl, A., Frigione, D., Goniche, M., Kirov, K., Leguen, F., Mailloux, J., Mayoral, M-L., Ongena, J., Petrzilka, V., Portafaix, C., & Rimini, F. (2009). LH power losses in front of the JET launcher. Paper presented at 18th Topical Conference on Radio Frequency Power in plasmas, Belgium. https://doi.org/10.1063/1.3273776