ELECTRON DENSITY TRANSPORT IN JET
1. ICRF and NBI heating produce increases in the plasma electron inventory, which are comparable under similar conditions, despite the differences in fuelling. The increase scales approximately linearly with applied power. 2. Hysteresis behaviour in the variation with n-e of the H or D influxes from the limiters leads to a spread in particle confinement time. Vacuum vessel conditions influence recycling and particle confinement. 3. The results of the electron density transport analysis, whilst yielding credible results do not provide a detailed insight into the transport mechanisms. The transport coefficients do not depend in any systematic way on the externally controllable parameters. It seems plausible that transiently, the transport coefficients assume a magnitude so as to prevent the density profile deviating far from a preferred shape. Work is in progress to explore if the measured electron flux GAMMA-e (r,t) is related to other driving terms such as the plasma pressure and its gradient.
Bibliographic Reference: 13TH EUROPEAN CONFERENCE ON CONTROLLED FUSION AND PLASMA HEATING, SCHLIERSEE (GERMANY), APRIL 14-18, 1986 PP. 49-52 WRITE TO THE PUBLICATIONS OFFICER, JET JOINT UNDERTAKING, ABINGDON, OXON, OX14 3EA (UK) MENTIONING REPORT JET-P(86)15, 1986
Record Number: 1989125007800 / Last updated on: 1987-01-01
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