DIRECT MEASUREMENT OF THE ELECTRON DIFFUSION COEFFICIENT ON JET USING A MICROWAVE REFLECTOMETER
A fixed frequency reflectometer on JET is used to make localized measurements of density changes. During sawtooth oscillations, the effects of the central density collapse are clearly seen outside the mixing radius. The timing of these density pulses is compared with model predictions to derive the particle diffusion coefficient, D-p. Values of D-p = 0.5 +- 0.8 m**2/s are derived, in good agreement with those obtained by other means.
Bibliographic Reference: 13TH EUROPEAN CONFERENCE ON CONTROLLED FUSION AND PLASMA HEATING, SCHLIERSEE (GERMANY), APRIL 14-18, 1986 PP. 113-116 WRITE TO THE PUBLICATIONS OFFICER, JET JOINT UNDERTAKING, ABINGDON, OXON, OX14 3EA (UK) MENTIONING REPORT JET-P(86)15, 1986
Record Number: 1989125002700 / Last updated on: 1987-01-01
Available languages: en