Samenvatting
JOREK 3D non-linear MHD simulations of a D2 Massive Gas Injection (MGI) triggered disruption
in JET are presented and compared in detail to experimental data. The MGI creates an overdensity
that rapidly expands in the direction parallel to the magnetic field. It also causes the growth of
magnetic islands (m=n ¼ 2=1 and 3/2 mainly) and seeds the 1/1 internal kink mode. O-points of
all island chains (including 1/1) are located in front of the MGI, consistently with experimental
observations. A burst of MHD activity and a peak in plasma current take place at the same time
as in the experiment. However, the magnitude of these two effects is much smaller than in the
experiment. The simulated radiation is also much below the experimental level. As a consequence,
the thermal quench is not fully reproduced. Directions for progress are identified. Radiation from
impurities is a good candidate. VC 2015 AIP Publishing LLC.
Originele taal-2 | Engels |
---|---|
Pagina's (van-tot) | 062509-1/18 |
Aantal pagina's | 18 |
Tijdschrift | Physics of Plasmas |
Volume | 22 |
DOI's | |
Status | Gepubliceerd - 2015 |