Calibrations and verifications performed in view of the ILA reinstatement at JET

Journal Article · Thu Dec 10 04:00:00 EST 2015 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.4936510· OSTI ID:22496209

Durodié, F. ^[1]; Helou, W. ^[2]; Monakhov, I.; Noble, C.; Wooldridge, E.; Blackman, T.; Graham, M. ^[3]

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1. LPP-ERM-KMS, TEC partner, Brussels (Belgium)
2. CEA, IRFM, F-13108 St-Paul-Lez-Durance (France)
3. CCFE, Culham Science Centre, Abingdon (United Kingdom)

The calibrations and verifications that are performed in preparation of the ITER-Like antenna (ILA) reinstatement at JET are reviewed. A brief reminder of the ILA system layout is given. The different calibration methods and results are then discussed. They encompass the calibrations of the directional couplers present in the system, the determination of the relation between the capacitor position readings and the capacitance value, the voltage probes calibration inside the antenna housing, the RF cables characterization and the acquisition electronics circuit calibration. Earlier experience with the ILA has shown that accurate calibrations are essential for the control of the full ILA close-packed antenna array, its protection through the S-Matrix Arc Detection and the new second stage matching algorithm to be implemented. Finally the voltage stand-off of the capacitors is checked and the phase range achievable with the system is verified. The system layout is modified as to allow dipole operation over the whole operating frequency range when operating with the 3dB combiner-splitters.

• OSTI ID: 22496209
• Journal Information: AIP Conference Proceedings, Journal Name: AIP Conference Proceedings Journal Issue: 1 Vol. 1689; ISSN APCPCS; ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ALGORITHMS
ANTENNAS
CABLES
CALIBRATION
CAPACITANCE
CAPACITORS
DIPOLES
ELECTRIC POTENTIAL
FREQUENCY RANGE
ITER TOKAMAK
JETS
RADIOWAVE RADIATION
S MATRIX
VERIFICATION