Experimental test of a two-port decoupler in the DIII-D fast wave current drive system

R. I. Pinsker, C. C. Petty, W. P. Cary, F. W. Baity, R. H. Goulding

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

9 Scopus citations

Abstract

The DIII-D Fast Wave Current Drive (FWCD) system employs a pair of resonant loops of transmission line to reduce the four element phased antenna array to a two-port system. The equivalent two-port can be characterized by a 2 × 2 admittance matrix Yij, the off-diagonal elements of which are non-zero due to the reactive coupling between the elements in the antenna array. By connecting another two-port network (a 'decoupler') in parallel with the two feedlines, it is possible to reduce the off-diagonal elements of the admittance matrix describing the resulting two-port device to zero, thereby effectively producing a system with no coupling between the two feedlines. In this paper we report a comparison of the theoretically predicted and experimentally determined characteristics of a decoupler in a high power ICRF system.

Original languageEnglish
Title of host publicationProceedings - Symposium on Fusion Engineering
PublisherPubl by IEEE
Pages1077-1080
Number of pages4
ISBN (Print)0780314131
StatePublished - 1993
Externally publishedYes
EventProceedings of the 15th IEEE/NPSS Symposium on Fusion Engineering. Part 2 (of 2) - Hyannis, MA, USA
Duration: Oct 12 1993Oct 12 1993

Publication series

NameProceedings - Symposium on Fusion Engineering
Volume2

Conference

ConferenceProceedings of the 15th IEEE/NPSS Symposium on Fusion Engineering. Part 2 (of 2)
CityHyannis, MA, USA
Period10/12/9310/12/93

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