Operations of the External Conjugate-T Matching System for the A2 ICRH Antennas at JET

Journal Article · Thu Nov 26 04:00:00 EST 2009 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.3273729· OSTI ID:21335706

Monakhov, I; Graham, M; Blackman, T; Mayoral, M -L; Nightingale, M; Sheikh, H; Whitehurst, A ^[1]

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1. Euratom/UKAEA Fusion Association, Culham Science Centre, OX14 3DB, Abingdon (United Kingdom)

The External Conjugate-T (ECT) matching system was successfully commissioned on two A2 ICRH antennas at JET in 2009. The system allows trip-free injection of RF power into ELMy H-mode plasmas in the 32-52 MHz band without antenna phasing restrictions. The ECT demonstrates robust and predictable performance and high load-tolerance during routine operations, injecting up to 4 MW average power into H-mode plasma with Type-I ELMs. The total power coupled to ELMy plasma by all the A2 antennas using the ECT and 3dB systems has been increased to 7 MW. Antenna arcing during ELMs has been identified as a new challenge to high-power ICRH operations in H-mode plasma. The implemented Advanced Wave Amplitude Comparison System (AWACS) has proven to be an efficient protection tool for the ECT scheme.

• OSTI ID: 21335706
• Journal Information: AIP Conference Proceedings, Journal Name: AIP Conference Proceedings Journal Issue: 1 Vol. 1187; ISSN APCPCS; ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
ANTENNAS
COMPARATIVE EVALUATIONS
COUPLING
EDGE LOCALIZED MODES
H-MODE PLASMA CONFINEMENT
ICR HEATING
JET TOKAMAK
MHZ RANGE
PLASMA
PLASMA DIAGNOSTICS
PLASMA SIMULATION
RF SYSTEMS