Screening of Hydrocarbon Sources in JET
Authors: J.D. Strachan, W. Fundamenski, M. Charlet, K. Erents, J. Gafert, C. Giroud, M von Hellermann, G. Matthews, G. McCracken, V. Philipps, J. Spence, M.F. Stamp, K-D. Zastrow, and EFDA-JET Work Programme Collaborators
Date of PPPL Report: June 2001
Presented at: the 28th EPS Conference on Controlled Fusion and Plasma Physics, Madeira, Portugal, June 18-22, 2001.
Carbon is the principal impurity in the Joint European Torus (JET). Methane screening experiments quantify the ability of the scrape-off layer (SOL)/divertor system to ionize carbon and transport it to the divertor, preventing core plasma contamination. Previous JET publications studied edge-localized-mode-averaged high-confinement mode screening, and separately, evaluated the methodology of low-confinemennt mode (L-mode) screening measurements. This paper extends the L-mode measurements to include relevant plasma parameter scans and DIVIMP modeling of the L-mode screening.