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Title: Probing Internal Transport Barriers with Heat Pulses in JET

Abstract

The first electron temperature modulation experiments in plasmas characterized by strong and long-lasting electron and ion internal transport barriers (ITB) have been performed in JET using ion cyclotron resonance heating in mode conversion scheme. The ITB is shown to be a well localized narrow layer with low heat diffusivity, characterized by subcritical transport and loss of stiffness. In addition, results from cold pulse propagation experiments suggest a second order transition process for ITB formation.

Authors:
 [1];  [2]; ; ; ; ;  [3]; ; ;  [4];  [5]; ; ; ; ; ; ;  [6];  [7]
  1. Istituto di Fisica del Plasma 'P.Caldirola', Associazione Euratom-ENEA-CNR, Milan (Italy)
  2. LPP-ERM/KMS, Association Euratom-Belgian State, TEC, B-1000 Brussels (Belgium)
  3. CEA Cadarache, Association Euratom-CEA, St Paul-lez-Durance Cedex (France)
  4. Helsinki University of Technology, Association Euratom-Tekes, P.O.Box 2200 (Finland)
  5. Dipartimento di Ingegneria Nucleare, Politecnico di Milano, Milan (Italy)
  6. Culham Science Centre, EURATOM/UKAEA Fusion Association, Oxon. OX14 3DB (United Kingdom)
  7. Max-Planck-Institut fuer Plasmaphysik, EURATOM Association, Garching (Germany)
Publication Date:
OSTI Identifier:
20777078
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physical Review Letters; Journal Volume: 96; Journal Issue: 9; Other Information: DOI: 10.1103/PhysRevLett.96.095002; (c) 2006 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; CHARGED-PARTICLE TRANSPORT; ELECTRON TEMPERATURE; ELECTRONS; HEAT; ICR HEATING; ION TEMPERATURE; IONS; MODE CONVERSION; PLASMA; PLASMA CONFINEMENT; PLASMA DIAGNOSTICS; PULSES; THERMAL BARRIERS; TOKAMAK DEVICES

Citation Formats

Mantica, P., Van Eester, D., Garbet, X., Laborde, L., Mazon, D., Moreau, D., Joffrin, E., Imbeaux, F., Mantsinen, M., Salmi, A., Marinoni, A., Hawkes, N., Kiptily, V., Sharapov, S., Thyagaraja, A., Voitsekhovitch, I., Vries, P. de, Zastrow, K.-D., and Pinches, S.. Probing Internal Transport Barriers with Heat Pulses in JET. United States: N. p., 2006. Web. doi:10.1103/PhysRevLett.96.095002.
Mantica, P., Van Eester, D., Garbet, X., Laborde, L., Mazon, D., Moreau, D., Joffrin, E., Imbeaux, F., Mantsinen, M., Salmi, A., Marinoni, A., Hawkes, N., Kiptily, V., Sharapov, S., Thyagaraja, A., Voitsekhovitch, I., Vries, P. de, Zastrow, K.-D., & Pinches, S.. Probing Internal Transport Barriers with Heat Pulses in JET. United States. doi:10.1103/PhysRevLett.96.095002.
Mantica, P., Van Eester, D., Garbet, X., Laborde, L., Mazon, D., Moreau, D., Joffrin, E., Imbeaux, F., Mantsinen, M., Salmi, A., Marinoni, A., Hawkes, N., Kiptily, V., Sharapov, S., Thyagaraja, A., Voitsekhovitch, I., Vries, P. de, Zastrow, K.-D., and Pinches, S.. Fri . "Probing Internal Transport Barriers with Heat Pulses in JET". United States. doi:10.1103/PhysRevLett.96.095002.
@article{osti_20777078,
title = {Probing Internal Transport Barriers with Heat Pulses in JET},
author = {Mantica, P. and Van Eester, D. and Garbet, X. and Laborde, L. and Mazon, D. and Moreau, D. and Joffrin, E. and Imbeaux, F. and Mantsinen, M. and Salmi, A. and Marinoni, A. and Hawkes, N. and Kiptily, V. and Sharapov, S. and Thyagaraja, A. and Voitsekhovitch, I. and Vries, P. de and Zastrow, K.-D. and Pinches, S.},
abstractNote = {The first electron temperature modulation experiments in plasmas characterized by strong and long-lasting electron and ion internal transport barriers (ITB) have been performed in JET using ion cyclotron resonance heating in mode conversion scheme. The ITB is shown to be a well localized narrow layer with low heat diffusivity, characterized by subcritical transport and loss of stiffness. In addition, results from cold pulse propagation experiments suggest a second order transition process for ITB formation.},
doi = {10.1103/PhysRevLett.96.095002},
journal = {Physical Review Letters},
number = 9,
volume = 96,
place = {United States},
year = {Fri Mar 10 00:00:00 EST 2006},
month = {Fri Mar 10 00:00:00 EST 2006}
}