@inproceedings{5b3fdf6cdfd94dffa9cc7ff7624e59a1,
title = "A fast exhaust-gas analyzer for the ITER divertor",
abstract = "This paper presents a first demonstration of an rf-excited optical gas analyzer (RF-OGA) designed to quantitatively measure minority species inside the neutralization region of the ITER divertor. The sensor head, which creates its own plasma excitation and plasma light emission, is designed to operate in a strong magnetic field and the rf coupling leads to strong light emission. It also allows for operation at low voltages, avoiding radiation-enhanced breakdowns expected when high voltages are present in the ITER environment. Furthermore, the preferred sensor head features full isolation of the metal rf electrodes from the induced plasma. This {"}electrodeless{"} operation will permit long operation without frequent maintenance. First tests of the RF-OGA in a strong (∼2T) magnetic field show a mostly linear response of the HeI-6678 {\AA} line emission to the He concentration that would produce a He measurement error of ±2%.",
keywords = "Divertor, Helium exhaust, Helium removal, ITER, Residual gas analysis",
author = "Klepper, {C. Christopher} and Carlson, {Eric P.} and Moschella, {John J.} and Hazelton, {Robert C.} and Keitz, {Michael D.}",
year = "2009",
doi = "10.1109/FUSION.2009.5226484",
language = "English",
isbn = "9781424426362",
series = "Proceedings - Symposium on Fusion Engineering",
booktitle = "2009 23rd IEEE/NPSS Symposium on Fusion Engineering, SOFE 2009",
note = "2009 23rd IEEE/NPSS Symposium on Fusion Engineering, SOFE 2009 ; Conference date: 01-06-2009 Through 05-06-2009",
}