Experimental proof of a load resilient external matching solution for the ITER ICRH system

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

DOI:https://doi.org/10.1063/1.2098224· OSTI ID:20726309

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

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

A reliable load resilient external matching scheme for the ITER ICRH system has been successfully tested on the mock-up of the external matching system with variable plasma load simulation. To avoid the deleterious mutual coupling effects the power has been passively distributed among the upper half and the bottom half of the 24 radiating straps of the antenna plug. In this plug the straps are grouped in 8 triplets by 4-ports junctions. The 4 top and 4 bottom triplets are respectively put in parallel outside the antenna plug near a voltage anti-node by means of T junctions. The load resilient matching is then obtained by a 4 parameters single 'conjugate T' (CT) configuration. For an antenna loading variation of about 1 to 8 {omega}/m the VSWR at the power source remains below 1.3. The maximum voltage along the line remains equal to the one in the antenna plug and there is a fair power share between the straps. A {pi}0{pi}0 toroidal phasing is easily obtained. The poloidal phasing between the top and bottom triplets is determined by the loading. A straightforward matching procedure is described. Good load resilience is also obtained by replacing the CT by one hybrid.

• OSTI ID: 20726309
• Journal Information: AIP Conference Proceedings, Journal Name: AIP Conference Proceedings Journal Issue: 1 Vol. 787; ISSN 0094-243X; ISSN APCPCS
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
ANTENNAS
CLOSURES
COMPUTERIZED SIMULATION
COUPLING
ELECTRIC POTENTIAL
HIGH-FREQUENCY HEATING
ITER TOKAMAK
LOADING
PLASMA
PLASMA SIMULATION
RF SYSTEMS
TRIPLETS
VARIATIONS