Community Research and Development Information Service - CORDIS

Abstract

THE FIRST PAPER, "TRANSPORT COEFFICIENTS IN THE JET BOUNDARY", DESCRIBES THE USE OF LONGMOR PROBES MOUNTED IN ANTENNA PROTECTION TIBES TO MEASURE ELECTRON TEMPERATURE DENSITIES IN THE JET SCRAPE-OFF LAYER. THESE WERE USED IN A SIMPLE DIFFUSIVE MODEL FOR ELECTRONS TO OBTAIN EMPIRICAL SCALING OF TRANSPORT COEFFICIENTS. THE SCALINGS WERE SHOWN TO BE INCONSISTENT WITH EXPERIMENTALLY DECAYING PROFILES OF ELECTRON TEMPERATURE AND DENSITY. THE SECOND PAPER "CURRENT FLOW PARALLEL TO THE FIELD IN A SCRAPE-OFF LAYER" ANALYSES ONE CAUSE OF ASYMMETRY WHICH LEADS TO CURRENT FLOW IN THE SCRAPE-OFF LAYER, USING A SIMPLE SINGLE-FLUID MODEL (TE2TI) WITH ONE-DIMENSIONSAL TRANSPORT PARALLEL TO THE FIELD AND A FLUX TUBE CONSIDERED TO BE CONNECTING TWO TARGETS WITH UNEQUAL PLASMA TEMPERATURES. IT IS ARGUED THAT THE CURRENT PARALLEL TO THE MAGNETIC FIELD MUST BE CONSIDERED AND THAT THE BOUNDARY CONDITION IS NON-AMBIPOLAR. IN THE FINAL PAPER, "THE NON-LINEAR DECAY OF THE FAST WAVE DURING ICRF HEATING", THE RELEVANCE OF THE NON-RESONANT DECAY OF THE FAST WAKE INTO AN ION-BERNSTEIN WAVE AND RESONANT DECAY OF THE MAGNETOSONIC WAVE INTO TWO-ION BERNSTEIN WAVES, ARE DISCUSSED IN CONNECTION IN THE DIRECT EDGE OBSERVED DURING ICRH.

Additional information

Authors: JET JET JOINT UNDERTAKING, ABINGDON, UK, JET JOINT UNDERTAKING, ABINGDON, UK
Bibliographic Reference: PAPER PRESENTED: WORKSHOP ON PLASMA EDGE THEORY IN FUSION DEVICES, AUGUSTUSBURG/CH, APRIL 26-30, 1988, AVAILABILITY: JET, ABINGDON, UK, MENTIONING REPORT JET-P(88)-24, 1988
Record Number: 1989126226500 / Last updated on: 1989-04-01
Category: PUBLICATION
Available languages: en