Probing Internal Transport Barriers with Heat Pulses in JET

Journal Article · Fri Mar 10 00:00:00 EST 2006 · Physical Review Letters

DOI:https://doi.org/10.1103/PhysRevLett.96.095002· OSTI ID:20777078

Mantica, P ^[1]; Van Eester, D ^[2]; Garbet, X; Laborde, L; Mazon, D; Moreau, D; Joffrin, E ^[3]; Imbeaux, F; Mantsinen, M; Salmi, A ^[4]; Marinoni, A ^[5]; Hawkes, N; Kiptily, V; Sharapov, S; Thyagaraja, A; Voitsekhovitch, I; Vries, P de; Zastrow, K -D ^[6]; Pinches, S ^[7]

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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)

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.

• OSTI ID: 20777078
• Journal Information: Physical Review Letters, Vol. 96, Issue 9; Other Information: DOI: 10.1103/PhysRevLett.96.095002; (c) 2006 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0031-9007
• Country of Publication: United States
• Language: English

Related Subjects

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