@inproceedings{57746f365f88484786a15afd5e2b9a48,
title = "Impurity radiation for detecting arcs during high lower hybrid power transmission at JET",
abstract = "During high power commissioning of the JET LH launcher, the radiation and impurity release has been analyzed from various diagnostics: VUV and visible spectroscopy, bolometry. These two last diagnostics have lines-of-sight viewing the launcher and can provide information about the electron and/or impurity source localisation. Using a database of 800 plasmas, it is concluded that the iron contamination (FeXV and FeXXIII) is very low for 94\% of the pulses and increases linearly with LH power. During arcs, a strong and fast increase of the radiation along the line-of-sight viewing the launcher is observed. This diagnostic could provide a tool for arc detection complementary to the RF measurements aiming at reducing the metal contamination in the plasma.",
keywords = "Arcing, ITER, Impurity, JET, LHCD, Lower hybrid, Radiation",
author = "M. Goniche and J. Mailloux and Y. Baranov and Biewer, \{T. M.\} and I. Coffey and L. Delpech and A. Ekedahl and J. Hillairet and K. Kirov and Mayoral, \{M. L.\} and J. Ongena and G. Sergienko",
year = "2009",
doi = "10.1063/1.3273764",
language = "English",
isbn = "9780735407534",
series = "AIP Conference Proceedings",
pages = "347--350",
booktitle = "Radio Frequency Power in plasmas - Proceedings of the 18th Topical Conference",
note = "18th Topical Conference on Radio Frequency Power in plasmas ; Conference date: 24-06-2009 Through 26-06-2009",
}