RECYCLING, ISOTOPIC EXCHANGE AND DENSITY BEHAVIOUR IN JET DISCHARGES
An understanding of recycling and particle confinement in tokamak discharges is an important prelude to achieving successful density control. Likewise, knowledge of isotopic exchange processes permits a rapid and efficient changeover in the plasma hydrogenic content, when interchanging the working gas between H-2 and D-2. The study reported is based mainly on measurements using optical spectroscopy. Absolute H-alpha or D-alpha intensities, measured simultaneously at the graphite limiters, antennae, inner and outer walls and at upper and lower walls, yielded the neutral influxes. Other selected spectral lines were used to obtain impurity influxes. A 7-channel interferometer provided electron density profiles, while information about H or D effluxes was obtained using a neutral particle analyser (NPA).
Bibliographic Reference: 12TH EUROPEAN CONFERENCE ON CONTROLLED FUSION AND PLASMA PHYSICS, BUDAPEST (HUNGARY), SEPT. 2-6, 1985 PP. 41-44 WRITE TO THE PUBLICATIONS OFFICER, JET JOINT UNDERTAKING, ABINGDON, OXON, OX14 3EA (UK), MENTIONING REPORT JET-P(85)10, 1985
Record Number: 1989124052700 / Last updated on: 1987-01-01
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