JOPSS - Search Results

Journal Articles

Emission rates of CH/CD and C $_{2}$ spectral bands for hydrocarbon-loss-events measured in JT-60U divertor plasmas

Nakano, Tomohide; Tsuzuki, Kazuhiro; Higashijima, Satoru; Kubo, Hirotaka; Asakura, Nobuyuki

Europhysics Conference Abstracts (CD-ROM), 29C, 4 Pages, 2005/00

http://epsppd.epfl.ch/Tarragona/pdf/P5_007.pdf

Emission rates of CH and C spectral bands for CH, CD_2 loss events due to dissociation, ionization and transport were measured in JT-60U divertor plasmas. The obtained data were used for estimating the chemical sputtering yields by a spectroscopic technique. The CH loss events over one CH photon emission was about 200 at electron temperatures between 30 eV and 70 eV. These values fell within the confidential band of the CD one. The CH loss events over one CH and one C photon emission were, respectively, between 200 - 300 and between 600 - 1800, and their ratio between 3 - 6. On the assumption that only CH among hydrocarbons generated by chemical sputtering emits the C spectral bands, the intensity of the CH spectral bands originating from CH is inferred from the intensity of C spectral bands multiplied by the obtained ratio, resulting in higher than the measured CH intensity. This result indicates that dominant hydrocarbons generated by the chemical sputtering is not CH but CH.

Journal Articles

Divertor spectroscopy with molecular transport

Kubo, Hirotaka; Takenaga, Hidenobu; Nakano, Tomohide; Higashijima, Satoru; Shimizu, Katsuhiro; Sawada, Keiji*; Kobayashi, Shinji*; JT-60 Team

Nuclear Fusion Research; Springer Series in Chemical Physics, Vol.78, p.121 - 134, 2004/11

no abstracts in English

Journal Articles

Hydrocarbons in divertor plasmas; What can be understood from spectroscopy

Nakano, Tomohide; Kado, Shinichiro*

Purazuma, Kaku Yugo Gakkai-Shi, 80(2), p.91 - 100, 2004/02

http://ci.nii.ac.jp/naid/110003827674

Descriptions on the band structure of the $A^2{it Delta}to X^2{it Pi}$ system of a CH radical, the method of hydrocarbon flux measurement and the modeling of hydrocarbon elementary processes are given. Then, the reviews of recent research achievements are presented. At JT-60U divertor plates, the chemical sputtering yields of not only $mbox{CH}_4$ but also $mbox{C}_2mbox{H}_x$ have been measured with simultaneous measurement of CH and $mbox{C}_2$ bands. In MAP-II of the University of Tokyo, hydrocarbon-enhanced molecular assisted recombination processes have been qualitatively proved by comparison of the measured and the modeled CH band intensity.

Journal Articles

Sputtering of carbon-tungsten mixed materials by low energy deuterium

Taniguchi, Masaki; Sato, Kazuyoshi; Ezato, Koichiro; Yokoyama, Kenji; Dairaku, Masayuki; Akiba, Masato

Journal of Nuclear Materials, 313-316(1-3), p.360 - 363, 2003/03

https://doi.org/10.1016/S0022-3115(02)01348-X

Times Cited Count：10 Percentile：56.35(Materials Science, Multidisciplinary)

no abstracts in English

Journal Articles

Carbon impurity behavior in W-shaped pumped divertor of JT-60U

Higashijima, Satoru; Kubo, Hirotaka; Sugie, Tatsuo; Shimizu, Katsuhiro; Sakasai, Akira; Asakura, Nobuyuki; Sakurai, Shinji; Hosogane, Nobuyuki; Konoshima, Shigeru; Tamai, Hiroshi; et al.

Journal of Nuclear Materials, 266-269, p.1078 - 1083, 1999/00

https://doi.org/10.1016/S0022-3115(98)00562-5

Times Cited Count：7 Percentile：49.64(Materials Science, Multidisciplinary)

no abstracts in English

Journal Articles

Spectroscopic study of the W-shaped divertor in JT-60U

Kubo, Hirotaka; Higashijima, Satoru; Takenaga, Hidenobu; Shimizu, Katsuhiro; Kumagai, Akira*; Ishijima, Tatsuo*; Suzuki, Shingo*; Itami, Kiyoshi; Sugie, Tatsuo; Sakasai, Akira; et al.

Proc. of 1998 ICPP & 25th EPS Conf. on Contr. Fusion and Plasma Physics, 22C, p.427 - 430, 1998/00

no abstracts in English

Journal Articles