Fast Wave Current Drive in JET ITB-Plasma

Journal Article · Mon Sep 26 00:00:00 EDT 2005 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.2098240· OSTI ID:20726326

Hellsten, T; Laxaaback, M; Bergkvist, T; Johnson, T; Brzozowski, J; Rachlew, E; Tennfors, E ^[1]; Mantsinen, M ^[2]; Matthews, G; Tala, T ^[3]; Meo, F ^[4]; Nguyen, F; Eriksson, L -G; Joffrin, E ^[5]; Noterdaeme, J -M ^[6]; Petty, C C ^[7]; Eester, D van ^[8]; Andrew, P; Beaumont, P; Giroud, C ^[9]

---

1. Association VR-Euratom (Sweden)
2. HUT, Association Euratom-Tekes (Finland)
3. VTT Processes, Association Euratom-Tekes (Finland)
4. Association Euratom-Risoe, National Laboratory (Denmark)
5. Association Euratom-CEA, CEA-Cadarache (France)
6. Max-Planck-Institut fuer Plasmaphysik, EURATOM Association, Garching (Germany)
7. General Atomics, San Diego (United States)
8. LPP-ERM/KMS, Association Euratom-Belgian State (Belgium)
9. UKAEA Fusion Association, Culham Science Centre (United Kingdom)

Fast wave current drive has been performed in JET plasmas with internal transport barriers, ITBs, and strongly reversed magnetic shear. Although the current drive efficiency of the power absorbed on the electrons is fairly high, only small effects are seen in the central current density. The main reasons are the parasitic absorption of RF power, the strongly inductive nature of the plasma and the interplay between the fast wave driven current and bootstrap current. The direct electron heating in the FWCD experiments is found to be strongly degraded compared to that with the dipole phasing.

• OSTI ID: 20726326
• Journal Information: AIP Conference Proceedings, Vol. 787, Issue 1; Conference: 16. topical conference on radio frequency power in plasmas, Park City, UT (United States), 11-13 Apr 2005; Other Information: DOI: 10.1063/1.2098240; (c) 2005 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
ABSORPTION
BOOTSTRAP CURRENT
CHARGED-PARTICLE TRANSPORT
CURRENT DENSITY
DIPOLES
ELECTRONS
HIGH-FREQUENCY HEATING
JET TOKAMAK
MAGNETIC FIELD CONFIGURATIONS
PLASMA
REVERSED SHEAR
RF SYSTEMS
THERMAL BARRIERS