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Title: Modelling of LHCD profile control for high performance DT experiments on JET

Abstract

Transport calculations with relevant lower hybrid current drive control have been performed with the JETTO transport code. The heat transport model and various particle transport models reproducing the experimental JET data have been used in JETTO for predictive high performance modelling. Application of 3.5 MW LHCD power provides a slightly inverted or flat q-profile across 70% of the plasma radius whereas, without LHCD the q-profile is monotonic during the flat-top phase. The results predict a fusion power up to 30 MW for the high performance DT plasmas in the optimised shear scenario at B{sub t}=3.4 T and I{sub p}=3.9 MA. Large uncertainties, however, still persist in particular on the particle transport which strongly influences on the modelling calculations. The presence of not well understood MHD instabilities is also likely to reduce the performance. The most optimistic model, still consistent with experimental results, predicts a fusion gain approaching Q=1.

Authors:
; ; ;  [1]; ; ; ;  [2]
  1. Association Euratom-Tekes, VTT Energy, P.O. Box 1604, FIN-02044 VTT (Finland)
  2. JET Joint Undertaking, Abingdon, Oxon OX14 SEA (United Kingdom)
Publication Date:
OSTI Identifier:
21210453
Resource Type:
Journal Article
Journal Name:
AIP Conference Proceedings
Additional Journal Information:
Journal Volume: 485; Journal Issue: 1; Conference: 13. topical conference on radio frequency power in plasmas, Annapolis, MD (United States), 12-14 Apr 1999; Other Information: DOI: 10.1063/1.59732; (c) 1999 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0094-243X
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; COMPUTERIZED SIMULATION; D-T OPERATION; ELECTRIC CURRENTS; ELECTRON TEMPERATURE; HEAT TRANSFER; ION TEMPERATURE; J CODES; JET TOKAMAK; LOWER HYBRID CURRENT DRIVE; MAGNETOHYDRODYNAMICS; PERFORMANCE; PLASMA; PLASMA CONFINEMENT; PLASMA DENSITY; PLASMA INSTABILITY; PLASMA SIMULATION; RF SYSTEMS; SHEAR

Citation Formats

Tala, T. J. J., Heikkinen, J. A., Karttunen, S. J., Paettikangas, T. J. H., Soeldner, F. X., Parail, V. V., Baranov, Yu. F., and Taroni, A. Modelling of LHCD profile control for high performance DT experiments on JET. United States: N. p., 1999. Web. doi:10.1063/1.59732.
Tala, T. J. J., Heikkinen, J. A., Karttunen, S. J., Paettikangas, T. J. H., Soeldner, F. X., Parail, V. V., Baranov, Yu. F., & Taroni, A. Modelling of LHCD profile control for high performance DT experiments on JET. United States. doi:10.1063/1.59732.
Tala, T. J. J., Heikkinen, J. A., Karttunen, S. J., Paettikangas, T. J. H., Soeldner, F. X., Parail, V. V., Baranov, Yu. F., and Taroni, A. Mon . "Modelling of LHCD profile control for high performance DT experiments on JET". United States. doi:10.1063/1.59732.
@article{osti_21210453,
title = {Modelling of LHCD profile control for high performance DT experiments on JET},
author = {Tala, T. J. J. and Heikkinen, J. A. and Karttunen, S. J. and Paettikangas, T. J. H. and Soeldner, F. X. and Parail, V. V. and Baranov, Yu. F. and Taroni, A.},
abstractNote = {Transport calculations with relevant lower hybrid current drive control have been performed with the JETTO transport code. The heat transport model and various particle transport models reproducing the experimental JET data have been used in JETTO for predictive high performance modelling. Application of 3.5 MW LHCD power provides a slightly inverted or flat q-profile across 70% of the plasma radius whereas, without LHCD the q-profile is monotonic during the flat-top phase. The results predict a fusion power up to 30 MW for the high performance DT plasmas in the optimised shear scenario at B{sub t}=3.4 T and I{sub p}=3.9 MA. Large uncertainties, however, still persist in particular on the particle transport which strongly influences on the modelling calculations. The presence of not well understood MHD instabilities is also likely to reduce the performance. The most optimistic model, still consistent with experimental results, predicts a fusion gain approaching Q=1.},
doi = {10.1063/1.59732},
journal = {AIP Conference Proceedings},
issn = {0094-243X},
number = 1,
volume = 485,
place = {United States},
year = {1999},
month = {9}
}