Balance of ionization and recombination of carbon ions in high density peripheral plasmas of the JT-60U tokamak
In high density and low temperature peripheral plasmas of JT-60U, i.e. detached divertor plasmas, C Ⅲ and C Ⅳ lines were observed by a visible and VUV spectrometers in order to investigate dominant radiators, radiation power and particle balance between the radiators. An emission peak was found between the inner strike and the X-point. With increasing electron density, the emission peak moved to the X-point with a constant electron temperature of ～ 7 eV. In the case the emission peak was located on the X-point, the dominant radiators in the emission peak were C2+ and C3+, which contributed 30％ and 60％ to the total radiative power. It was found that C3+ was produced by the ionization of C2+ and the volume recombination of C4+ at a similar rates. However, the loss flux of C3+ was lower by two orders of magnitude than the C3+ production flux, indicating that another loss mechanism such as transport loss around the X-point was significant.
diverge atomic process collisional-radiative model impurity carbon radiation
T.Nakano H.Kubo N.Asakura K.Shimizu
Japan Atomic Energy Agency, 801-1, Mukoyama, Naka, Ibaraki, 311-0193, Japan
国际会议
北京
英文
131-140
2008-10-27（万方平台首次上网日期，不代表论文的发表时间）