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Abstract

During ICRF heating in JET, the neutral influxes generally increase. The magnitude of influxes and also the density increase are proportional to the radio frequency (rf) power. The important parameter is the number of neutral atoms available for desorption from the wall and limiters. The global particle confinement time, which is the ratio of the electron content to the total influxes, decreases with the rf power input. At the onset of rf power a rapid desorption occurs. The scaling of the wall and limiter fluxes with plasma current and rf power indicate, that the density and temperature profiles in the scrape-off-layer behave as expected from the simple diffusive models of the plasma boundary.

Additional information

Authors: BURES M, JET JOINT UNDERTAKING, ABINGDON, UK;BHATNAGAR V P, JET JOINT UNDERTAKING, ABINGDON, UK;JACQUINOT J, JET JOINT UNDERTAKING, ABINGDON, UK;MORGAN P, JET JOINT UNDERTAKING, ABINGDON, UK;START D F H JET JOINT UNDERTAKING, ABINGDON, UK, JET JOINT UNDERTAKING, ABINGDON, UK
Bibliographic Reference: REPORT JET-P(88)03, 1988, AVAILABILITY: JET, ABINGDON, UK
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