|Title||Determination of tungsten and molybdenum concentrations from an x-ray range spectrum in JET with the ITER-like wall configuration|
|Publication Type||Journal Article|
|Year of Publication||2015|
|Authors||T. Nakano, A.E Shumack, C.F Maggi, M. Reinke, K.D Lawson, I. Coffey, T. Putterich, S. Brezinsek, B. Lipschultz, G.F Matthews, M. Chernyshova, K. Jakubowska, M. Scholz, J. Rzadkiewicz, T. Czarski, W. Dominik, G. Kasprowicz, K. Pozniak, W. Zabolotny, K.D Zastrow, N.J Conway, JET Contributors|
|Journal||Journal of Physics B-Atomic Molecular and Optical Physics|
|Date Published||Jul 28|
The W45+ and W46+ 3p-4d inner shell excitation lines in addition to Mo32+ 2p-3s lines have been identified from the spectrum taken by an upgraded high-resolution x-ray spectrometer. It is found from analysis of the absolute intensities of the W46+ and Mo32+ lines that W and Mo concentrations are in the range of similar to 10(-5) and similar to 10(-6), respectively, with a ratio of similar to 5% in JET with the ITER-like wall configuration for ELMy H-mode plasmas with a plasma current of 2.0-2.5 MA, a toroidal magnetic field of 2.7 T and a neutral beam injection power of 14-18 MW. For the purpose of checking self-consistency, it is confirmed that the W concentration determined from the W45+ line is in agreement with that from the W46+ line within 20% and that the plasma effective charge determined from the continuum of the first order reflection spectrum is also in agreement with that from the second order within 50%. Further, the determined plasma effective charge is in agreement with that determined from a visible spectroscopy, confirming that the sensitivity of the x-ray spectrometer is valid and that the W and the Mo concentrations are also likely to be valid.
|Alternate Title||J. Phys. B|
Go back one page.