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Article Dans Une Revue Physics of Plasmas Année : 2015

Three-dimensional non-linear magnetohydrodynamic modeling of massive gas ă injection triggered disruptions in JET

Résumé

JOREK 3D non-linear MHD simulations of a D-2 Massive Gas Injection (MGI) ă triggered disruption in JET are presented and compared in detail to ă experimental data. The MGI creates an overdensity that rapidly expands ă in the direction parallel to the magnetic field. It also causes the ă growth of magnetic islands (m/n = 2/1 and 3/2 mainly) and seeds the 1/1 ă internal kink mode. O-points of all island chains (including 1/1) are ă located in front of the MGI, consistently with experimental ă observations. A burst of MHD activity and a peak in plasma current take ă place at the same time as in the experiment. However, the magnitude of ă these two effects is much smaller than in the experiment. The simulated ă radiation is also much below the experimental level. As a consequence, ă the thermal quench is not fully reproduced. Directions for progress are ă identified. Radiation from impurities is a good candidate. (C) 2015 AIP ă Publishing LLC.

Dates et versions

hal-01465044 , version 1 (10-02-2017)

Identifiants

Citer

Alexandre Fil, Eric Nardon, M. Hoelzl, Guido T. A. Huijsmans, Ă F. Orain, et al.. Three-dimensional non-linear magnetohydrodynamic modeling of massive gas ă injection triggered disruptions in JET. Physics of Plasmas, 2015, 22 (6), pp.062509 ⟨10.1063/1.4922846⟩. ⟨hal-01465044⟩
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