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

P. Dumortier, F. Durodié, W. Helou, I. Monakhov, C. Noble, E. Wooldridge, T. Blackman, M. Graham

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

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 closepacked 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.

Original languageEnglish
Title of host publicationRadio Frequency Power in Plasmas
Subtitle of host publicationProceedings of the 21St Topical Conference
EditorsRobert I. Pinsker
PublisherAmerican Institute of Physics Inc.
ISBN (Electronic)9780735413368
DOIs
Publication statusPublished - 10 Dec 2015
Event21st Topical Conference on Radiofrequency Power in Plasmas - Lake Arrowhead, United States
Duration: 27 Apr 201529 Apr 2015

Publication series

NameAIP Conference Proceedings
Volume1689
ISSN (Print)0094-243X
ISSN (Electronic)1551-7616

Conference

Conference21st Topical Conference on Radiofrequency Power in Plasmas
Country/TerritoryUnited States
CityLake Arrowhead
Period27/04/1529/04/15

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