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Abstract

Theoretical determinations of the coupling resistance for all four antenna configurations used in JET have been obtained and compared to experimental measurements. The coaxial modes have been found to be of little importance in JET, and for the monopole antenna contribute less than 10%. Dependence of the coupling resistance on the current distribution has been studied. Though in practice gamma may be slightly different for each antenna configuration, theoretically a value of gamma = 0.9 m**-1 gives a good agreement with experiment for all four antenna configurations. The behaviour of R-c with frequency for the monopole antenna has been verified. The effects of edge conditions on coupling resistance have been investigated for all antenna configurations. R-c depends mainly on the plasma density at the limiter, increasing by about 20% when the edge density doubles.

Additional information

Authors: EVRARD M P, JET JOINT UNDERTAKING, ABINGDON (UK);BHATNAGAR V P, JET JOINT UNDERTAKING, ABINGDON (UK);BURES M, JET JOINT UNDERTAKING, ABINGDON (UK);SAND F JET JOINT UNDERTAKING, ABINGDON (UK), JET JOINT UNDERTAKING, ABINGDON (UK)
Bibliographic Reference: 13TH EUROPEAN CONFERENCE ON CONTROLLED FUSION AND PLASMA HEATING, SCHLIERSEE (GERMANY), APRIL 14-18, 1986 PP. 85-88 WRITE TO THE PUBLICATIONS OFFICER, JET JOINT UNDERTAKING, ABINGDON, OXON, OX14 3EA (UK) MENTIONING REPORT JET-P(86)15, 1986
Record Number: 1989125008400 / Last updated on: 1987-01-01
Category: PUBLICATION
Available languages: en
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