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

Journal Article · Mon Sep 26 04:00:00 EDT 2005 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.2098223· OSTI ID:20726308

Messiaen, A; Vervier, M; Dumortier, P; Lamalle, P; Louche, F ^[1]

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1. LPP-ERM/KMS, EURATOM-Belgian State Association, Trilateral Euregio Cluster, B-1000 Brussels (Belgium)

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.

• OSTI ID: 20726308
• Journal Information: AIP Conference Proceedings, Journal Name: AIP Conference Proceedings Journal Issue: 1 Vol. 787; ISSN APCPCS; ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
ACTUATORS
ANTENNAS
ASYMMETRY
COUPLING
ELECTRICAL PROPERTIES
HIGH-FREQUENCY HEATING
ITER TOKAMAK
LOADING
PERFORMANCE
PLASMA
POWER DISTRIBUTION
RF SYSTEMS
SCATTERING
TRIPLETS
WATER