Study of the ITER ICRH system with external matching by means of a mock-up loaded by a variable water load

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Abstract

A mock-up of the complete antenna array (24 straps grouped in 8 triplets) of the ICRH system with external matching for ITER has been constructed with a length reduction factor of 5. At a frequency increased by the same factor the electrical properties of the full-scale system can be measured. A movable water tank in front of the array simulates variable plasma loading. Measurements of the matching performances of various external circuit configurations and of the scattering matrix of the system show (i) the non-negligible effect of mutual coupling on load resilient matching by Conjugate-T (CT) or hybrid leading to coupling between the matching actuators and the generators and asymmetry in power distribution, (ii) good load resilience of a single CT for the right choice of configuration and number of matching parameters, (iii) the large number of matching solutions for coupled CT's, (iv) the benefit of passive power distribution to the straps.

Original languageEnglish
Title of host publicationRADIO FREQUENCY POWER IN PLASMAS
Subtitle of host publication16th Topical Conference on Radio Frequency Power in Plasmas
Pages198-201
Number of pages4
DOIs
Publication statusPublished - 26 Sept 2005
EventRADIO FREQUENCY POWER IN PLASMAS: 16th Topical Conference on Radio Frequency Power in Plasmas - Park City, UT, United States
Duration: 11 Apr 200513 Apr 2005

Publication series

NameAIP Conference Proceedings
Volume787
ISSN (Print)0094-243X
ISSN (Electronic)1551-7616

Conference

ConferenceRADIO FREQUENCY POWER IN PLASMAS: 16th Topical Conference on Radio Frequency Power in Plasmas
Country/TerritoryUnited States
CityPark City, UT
Period11/04/0513/04/05

Keywords

  • ICRH
  • ITER
  • Matching
  • Mock-up
  • Water load

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