Spectroscopic study of radiative losses in the JT-60U divertor plasma
Authors:
- 1 October 1995
- journal article
- Published by IOP Publishing in Plasma Physics and Controlled Fusion
- Vol. 37 (10) , 1133-1140
Abstract
Spatial distributions of absolute line intensities of D I and C II-IV in the divertor region have been measured simultaneously with a 38-channel optical fibre array in JT-60U. The radiative losses in the divertor region have been derived from the intensities. In L-mode discharges without the MARFE, the fractions of the radiative losses due to deuterium and carbon are 36% and 64%, respectively. The carbon radiation is related to the carbon influx by a simple impurity model based on the confinement time of the carbon ion on the assumption of the physical sputtering. The power radiated due to carbon accounts for a large increase in the radiative losses by the MARFE.Keywords
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