Commissioning of the wideband matching system for ICRH of ELMy JET plasmas
Creators
- 1. LPP-ERM/KMS, Association EURATOM-Belgian State, TEC, Royal Military Academy, B-1000 Brussels (Belgium)
- 2. EFDA-JET CSU, Culham Science Centre, Abingdon OX14 3EA (United Kingdom)
- 3. Oak Ridge National Laboratory (United States)
- 4. UKAEA/EURATOM Fusion Association, Culham Science Centre, Abingdon OX14 3DB (United Kingdom)
Description
The conventional JET ICRH antenna matching system cannot respond to large and rapid load variations induced by the ELMs. Unacceptably large bursts of reflected power occur at the generators, severely limiting the ability to deliver RF power to ELMy plasmas. A wideband matching system based on prematching sliding impedances and fast frequency control is under commissioning on one of the antenna arrays. When suitably configured, the new system, which operates in 4 frequency bands inside the JET plant range, should strongly reduce the ELM-induced power reflection by rapid adjustments of generator frequency. The paper reports recent progress achieved in its commissioning. Successful operation of the fast frequency control loop has been demonstrated during ELMs, and work is underway to bring the system to full operation
Additional details
Identifiers
- DOI
- 10.1063/1.1424158;
Publishing Information
- Journal Title
- AIP Conference Proceedings
- Journal Volume
- 595
- Journal Issue
- 1
- Journal Page Range
- p. 118-121
- ISSN
- 0094-243X
- CODEN
- APCPCS
Conference
- Title
- 14. topical conference on radio frequency power in plasmas
- Dates
- 7-9 May 2001
- Place
- Oxnard, CA (United States)
INIS
- Country of Publication
- United States
- Country of Input or Organization
- International Atomic Energy Agency (IAEA)
- INIS RN
- 35076420
- Subject category
- S70: PLASMA PHYSICS AND FUSION TECHNOLOGY;
- Resource subtype / Literary indicator
- Conference
- Descriptors DEI
- ANTENNAS; COMMISSIONING; CYCLOTRON RESONANCE; EDGE LOCALIZED MODES; FREQUENCY CONTROL; IMPEDANCE; JET TOKAMAK; OPERATION; PLASMA; PLASMA HEATING; RF SYSTEMS
- Descriptors DEC
- CLOSED PLASMA DEVICES; CONTROL; ELECTRICAL EQUIPMENT; EQUIPMENT; HEATING; INSTABILITY; PLASMA INSTABILITY; PLASMA MACROINSTABILITIES; RESONANCE; THERMONUCLEAR DEVICES; TOKAMAK DEVICES
Optional Information
- Notes
- (c) 2001 American Institute of Physics.