Diagnostics for the spatial distribution of hydrogen atoms around the divertor region

L. Muraoka, K. Miyazaki, U. Czarnetzki, T. Kajiwara, Kiichiro Uchino, H. Takenaga, T. Okada, M. Maeda, T. Yamauchi, T. Shoji

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

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.

Original languageEnglish
Pages (from-to)563-566
Number of pages4
JournalJournal of Nuclear Materials
Volume220-222
DOIs
Publication statusPublished - Jan 1 1995

Fingerprint

Spatial distribution
Hydrogen
hydrogen atoms
spatial distribution
Atoms
Fluorescence
Deuterium
Excimer lasers
excimer lasers
laser induced fluorescence
excitation
deuterium
Signal to noise ratio
signal to noise ratios
Gases
Plasmas
Wavelength
fluorescence
Lasers
shift

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics
  • Materials Science(all)
  • Nuclear Energy and Engineering

Cite this

Muraoka, L., Miyazaki, K., Czarnetzki, U., Kajiwara, T., Uchino, K., Takenaga, H., ... Shoji, T. (1995). Diagnostics for the spatial distribution of hydrogen atoms around the divertor region. Journal of Nuclear Materials, 220-222, 563-566. https://doi.org/10.1016/0022-3115(94)00540-0

Diagnostics for the spatial distribution of hydrogen atoms around the divertor region. / Muraoka, L.; Miyazaki, K.; Czarnetzki, U.; Kajiwara, T.; Uchino, Kiichiro; Takenaga, H.; Okada, T.; Maeda, M.; Yamauchi, T.; Shoji, T.

In: Journal of Nuclear Materials, Vol. 220-222, 01.01.1995, p. 563-566.

Research output: Contribution to journalArticle

Muraoka, L, Miyazaki, K, Czarnetzki, U, Kajiwara, T, Uchino, K, Takenaga, H, Okada, T, Maeda, M, Yamauchi, T & Shoji, T 1995, 'Diagnostics for the spatial distribution of hydrogen atoms around the divertor region', Journal of Nuclear Materials, vol. 220-222, pp. 563-566. https://doi.org/10.1016/0022-3115(94)00540-0
Muraoka, L. ; Miyazaki, K. ; Czarnetzki, U. ; Kajiwara, T. ; Uchino, Kiichiro ; Takenaga, H. ; Okada, T. ; Maeda, M. ; Yamauchi, T. ; Shoji, T. / Diagnostics for the spatial distribution of hydrogen atoms around the divertor region. In: Journal of Nuclear Materials. 1995 ; Vol. 220-222. pp. 563-566.
@article{d806f2ca74094327b05b781407484b0d,
title = "Diagnostics for the spatial distribution of hydrogen atoms around the divertor region",
abstract = "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.",
author = "L. Muraoka and K. Miyazaki and U. Czarnetzki and T. Kajiwara and Kiichiro Uchino and H. Takenaga and T. Okada and M. Maeda and T. Yamauchi and T. Shoji",
year = "1995",
month = "1",
day = "1",
doi = "10.1016/0022-3115(94)00540-0",
language = "English",
volume = "220-222",
pages = "563--566",
journal = "Journal of Nuclear Materials",
issn = "0022-3115",
publisher = "Elsevier",

}

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, Kiichiro

AU - Takenaga, H.

AU - Okada, T.

AU - Maeda, M.

AU - Yamauchi, T.

AU - Shoji, T.

PY - 1995/1/1

Y1 - 1995/1/1

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.

UR - http://www.scopus.com/inward/record.url?scp=0042554856&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0042554856&partnerID=8YFLogxK

U2 - 10.1016/0022-3115(94)00540-0

DO - 10.1016/0022-3115(94)00540-0

M3 - Article

AN - SCOPUS:0042554856

VL - 220-222

SP - 563

EP - 566

JO - Journal of Nuclear Materials

JF - Journal of Nuclear Materials

SN - 0022-3115

ER -