J. Phys. Colloques
Volume 49, Number C1, Mars 1988IAU Colloquium N° 102 on UV and X-ray Spectroscopy of Astrophysical and Laboratory Plasmas
|Page(s)||C1-91 - C1-94|
J. Phys. Colloques 49 (1988) C1-91-C1-94
HIGH RESOLUTION SPECTROSCOPY OF DITE TOKAMAK IN THE 10Å REGIONJ. DUNN1, R. BARNSLEY1, K.D. EVANS1 et N.J. PEACOCK2
1 Dept. of Physics, Leicester University, GB-Leicester LE1 7RH, Great-Britain
2 Culham Laboratory, GB-Abingdon 0x14 3DB, Oxon, Great-Britain
An account is given of the X-Ray emission from the DITE tokamak in the spectral region 4Å-10Å measured by a Johann curved crystal photographic spectrometer. This high resolution instrument has been used for detailed line identifications eg. of L-shell transitions in the Fe spectrum at wavelengths ~8Å and of the He-like ion spectra of Al, Si and Ar. The fine structure has been resolved for H-like Mg, Al and Si. Departures from the statistical value of 0.5 for β, the intensity ratio of the Lyman-α doublet, have been observed. Experimental values for the fine structure separation are presented for these medium Z metals.