TY - JOUR
T1 - Diagnostics for the spatial distribution of hydrogen atoms around the divertor region
AU - Muraoka, L.
AU - Miyazaki, K.
AU - Czarnetzki, U.
AU - Kajiwara, T.
AU - Uchino, K.
AU - Takenaga, H.
AU - Okada, T.
AU - Maeda, M.
AU - Yamauchi, T.
AU - Shoji, T.
N1 - Copyright:
Copyright 2017 Elsevier B.V., All rights reserved.
PY - 1995
Y1 - 1995
N2 - For measurements of spatial distributions of hydrogen atoms around the divertor region, laser-induced fluorescence (LIF) based on various two-phonon excitation schemes from the ground level is discussed, and merits and demerits under different experimental conditions are compared. Excitation to the n=3 level using an ArF excimer laser (wavelength = 193 nm) and its Raman shifts in deuterium gas (205 and 219 nm) and observation at Balmer alpha transition (656 nm) was found to be the best for the above purpose. A design study of the fluorescence observation and estimation of expected signal to noise (SN) ratios were performed for measurements of atomic hydrogen densities on plasmas around the JFT-2M tokamak divertor, showing that such a measurement is possible.
AB - For measurements of spatial distributions of hydrogen atoms around the divertor region, laser-induced fluorescence (LIF) based on various two-phonon excitation schemes from the ground level is discussed, and merits and demerits under different experimental conditions are compared. Excitation to the n=3 level using an ArF excimer laser (wavelength = 193 nm) and its Raman shifts in deuterium gas (205 and 219 nm) and observation at Balmer alpha transition (656 nm) was found to be the best for the above purpose. A design study of the fluorescence observation and estimation of expected signal to noise (SN) ratios were performed for measurements of atomic hydrogen densities on plasmas around the JFT-2M tokamak divertor, showing that such a measurement is possible.
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U2 - 10.1016/0022-3115(94)00540-0
DO - 10.1016/0022-3115(94)00540-0
M3 - Article
AN - SCOPUS:0042554856
SN - 0022-3115
VL - 220-222
SP - 563
EP - 566
JO - Journal of Nuclear Materials
JF - Journal of Nuclear Materials
ER -