Conference proceeding
Lower hybrid current drive and antenna coupling experiments on TdeV
FUSION ENERGY 1996, Vol.3, pp.343-350
PROCEEDING SERIES OF THE INTERNATIONAL ATOMIC ENERGY AGENCY
01/01/1997
Abstract
At a coupled RF power density of 50 MW/m(2), the LHCD system installed on TdeV has achieved record performance at 3.7 GHz. With TdeV's unique set of RF diagnostics, lower hybrid wave coupling was found to be in agreement with the antenna modelling code SWAN. Discrepancies exist at high RF power but the launched spectra do not seem to be affected. Strong toroidal asymmetries in power deposition on divertor and first wall components during LHCD were observed and characterized. A possible mechanism for the power dissipation is described. Current drive experiments have been performed and comparison with codes is presented. Results from a set of diagnostics suggest that the radial profile of suprathermal electrons is broader than code predictions. Furthermore, the velocity distribution extends well beyond the N-1 resonance energies permitted by the LH wave accessibility. Large current profile modifications (-0.4 less than or equal to Delta l(i) less than or equal to 0.2) in steady state have been obtained by tailoring the power deposition of the LH wave in TdeV. These profile modifications have an impact on energy confinement, as W-e(KlN)/W-e(RL) increases with Delta l(i).
Details
- Title: Subtitle
- Lower hybrid current drive and antenna coupling experiments on TdeV
- Creators
- A CoteY DemersP BrookerC CoteP JacquetJ MaillouxG AbelC BoucherD BoydR DecosteV FuchsM GonicheJ L LachambreX LitaudonD MichaudG W PacherY PeyssonI P ShkarofskyM M ShoucriF SkiffM St-OngeB Terreault
- Resource Type
- Conference proceeding
- Publication Details
- FUSION ENERGY 1996, Vol.3, pp.343-350
- Publisher
- Int Atomic Energy Agency
- Series
- PROCEEDING SERIES OF THE INTERNATIONAL ATOMIC ENERGY AGENCY
- ISSN
- 0074-1884
- Number of pages
- 8
- Language
- English
- Date published
- 01/01/1997
- Academic Unit
- Physics and Astronomy
- Record Identifier
- 9984442213002771
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