Multi-megawatt, gigajoule plasma operation in Tore Supra
Journal article, 2014

Integrating several important technological elements required for long pulse operation in magnetic fusion devices, the Tore Supra tokamak routinely addresses the physics and technology issues related to this endeavor and, as a result, contributes essential information on critical issues for ITER. During the last experimental campaign, components of the radiofrequency system including an ITER relevant launcher (passive active multijunction (PAM)) and continuous wave/3.7 GHz klystrons, have been extensively qualified, and then used to develop steady state scenarios in which the lower hybrid (LH), ion cyclotron (IC) and electron cyclotron (EC) systems have been combined in fully stationary shots (duration similar to 150 s, injected power up to similar to 8MW, injected/extracted energy up to similar to 1 GJ). Injection of LH power in the 5.0-6.0MW range has extended the domain of accessible plasma parameters to higher densities and non-inductive currents. These discharges exhibit steady electron internal transport barriers (ITBs). We report here on various issues relevant to the steady state operation of future devices, ranging from operational aspects and limitations related to the achievement of long pulses in a fully actively cooled fusion device (e. g. overheating due to fast particle losses), to more fundamental plasma physics topics. The latter include a beneficial influence of IC resonance heating on the magnetohydrodynamic (MHD) stability in these discharges, which has been studied in detail. Another interesting observation is the appearance of oscillations of the central temperature with typical periods of the order of one to several seconds, caused by a nonlinear interplay between LH deposition, MHD activity and bootstrap current in the presence of an ITB.

RIPPLE

Physics

Fluids & Plasmas

MHD

1991

GERMANY

TOKAMAK

CONFINEMENT

V33

Nuclear

tokamak

JUN 03-07

ANTENNAS

ICRH

POWER

P1601

1991

RCELLI F

STEADY-STATE

lower hybrid

MHD

BERLIN

Physics

steady-state

gigajoule

PLASMA PHYSICS AND CONTROLLED FUSION18TH EUROPEAN CONF ON CONTROLLED FUSION AND PLASMA PHYSICS

Tore Supra

Author

R. J. Dumont

The French Alternative Energies and Atomic Energy Commission (CEA)

M. Goniche

The French Alternative Energies and Atomic Energy Commission (CEA)

Annika Ekedahl

Chalmers, Applied Physics, Nuclear Engineering

B. Saoutic

The French Alternative Energies and Atomic Energy Commission (CEA)

J. F. Artaud

The French Alternative Energies and Atomic Energy Commission (CEA)

V. Basiuk

The French Alternative Energies and Atomic Energy Commission (CEA)

C. Bourdelle

The French Alternative Energies and Atomic Energy Commission (CEA)

Y. Corre

The French Alternative Energies and Atomic Energy Commission (CEA)

J. Decker

The French Alternative Energies and Atomic Energy Commission (CEA)

D. Elbeze

The French Alternative Energies and Atomic Energy Commission (CEA)

G. Giruzzi

The French Alternative Energies and Atomic Energy Commission (CEA)

G. T. Hoang

The French Alternative Energies and Atomic Energy Commission (CEA)

F. Imbeaux

The French Alternative Energies and Atomic Energy Commission (CEA)

E. Joffrin

The French Alternative Energies and Atomic Energy Commission (CEA)

X. Litaudon

The French Alternative Energies and Atomic Energy Commission (CEA)

P. Lotte

The French Alternative Energies and Atomic Energy Commission (CEA)

P. Maget

The French Alternative Energies and Atomic Energy Commission (CEA)

D. Mazon

The French Alternative Energies and Atomic Energy Commission (CEA)

Emelie Nilsson

Chalmers, Applied Physics, Nuclear Engineering

Plasma Physics and Controlled Fusion

0741-3335 (ISSN) 1361-6587 (eISSN)

Vol. 56 7

Subject Categories

Fusion, Plasma and Space Physics

DOI

10.1088/0741-3335/56/7/075020

More information

Latest update

4/11/2018