Effect of low magnetic shear induced by lower hybrid current drive on high performance internal transport barriers in the Joint European Torus (JET)
Creators
- Castaldo, C.1, 2, 3, 4, 5
- Cesario, R.1, 2, 3, 4, 5
- Cardinali, A.1, 2, 3, 4, 5
- Litaudon, X.1, 2, 3, 4, 5
- Mailloux, J.1, 2, 3, 4, 5
- Parail, V.1, 2, 3, 4, 5
- Tala, T.1, 2, 3, 4, 5
- Crisanti, F.1, 2, 3, 4, 5
- Gormezano, C.1, 2, 3, 4, 5
- Panaccione, L.1, 2, 3, 4, 5
- Santini, F.1, 2, 3, 4, 5
- Smeulders, P.1, 2, 3, 4, 5
- Tuccillo, A.A.1, 2, 3, 4, 5
- Contributors to the EFDA-JET workprogramme
- 1. Associazione EURATOM-ENEA Sulla Fusione, Centro Ricerche Frascati, c.p. 65, 00044 Frascati (Italy)
- 2. Association Euratom-Tekes, VTT Processes, P.O. Box 1404, FIN-02044 (Finland)
- 3. Euratom-UKAEA Fusion Association, Culham Science Centre, Abingdon, Oxfordshire, OX 14 3DB (United Kingdom)
- 4. Association Euratom-CEA, CEA Cadarache 13108, St. Paul lez Durance (France)
- 5. Associazione EURATOM-ENEA Sulla Fusione, Centro Ricerche Frascati, c.p. 65, OOO44 Frascati (Italy)
Description
A low/negative magnetic shear profile is maintained in the Joint European Torus in a plasma target with plasma current of 2.4 MA using 2.2 MW of lower hybrid (LH) power combined with neutral beam injection and ion cyclotron radiofrequency heating. In this scenario, an internal transport barrier (ITB) with time duration up to about 4 s is produced. The fraction of LH driven current is about 25% the total plasma current. During LH power application, the layer with reversed shear q-profile can be maintained in a suitable radial position to inhibit the onset of turbulence, which might otherwise drive the ITB to collapse. LH power could be used as a tool to drive moderate amounts of noninductive off-axis current and sustain high performance ITBs at high plasma current
Additional details
Identifiers
- DOI
- 10.1063/1.1488951;
Publishing Information
- Journal Title
- Physics of Plasmas
- Journal Volume
- 9
- Journal Issue
- 8
- Journal Page Range
- p. 3205-3208
- ISSN
- 1070-664X
- CODEN
- PHPAEN
INIS
- Country of Publication
- United States
- Country of Input or Organization
- International Atomic Energy Agency (IAEA)
- INIS RN
- 35037546
- Subject category
- S70: PLASMA PHYSICS AND FUSION TECHNOLOGY;
- Descriptors DEI
- BEAM INJECTION HEATING; CHARGED-PARTICLE TRANSPORT; ICR HEATING; JET TOKAMAK; LOWER HYBRID CURRENT DRIVE; NEUTRAL ATOM BEAM INJECTION; PLASMA; REVERSED SHEAR; TURBULENCE
- Descriptors DEC
- BEAM INJECTION; CLOSED PLASMA DEVICES; HEATING; HIGH-FREQUENCY HEATING; NON-INDUCTIVE CURRENT DRIVE; PLASMA HEATING; RADIATION TRANSPORT; THERMONUCLEAR DEVICES; TOKAMAK DEVICES
Optional Information
- Notes
- (c) 2002 American Institute of Physics.
- Collaborations
- Contributors to the EFDA-JET workprogramme