| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 271527 | Fusion Engineering and Design | 2014 | 5 Pages |
•We simulated disruption mitigation using massive noble gas injection with the TOKES code.•The results of these simulations have been verified by comparison with JET experiments.•We have found that the amount of gas for triggering the thermal quench can be reduced 40 times.•We propose a special sacrificial diaphragm for mitigation of the wall damage with runaway electrons (RE).•The diaphragm erosion with RE beam has been roughly estimated.
Simulations of massive gas injection (MGI) into the JET plasma using noble gas (NG) have been performed using the TOKES code. The results of these simulations have been verified by comparison with JET experiment for disruption control. Further simulations performed showed that the amount of NG for triggering the thermal quench can be reduced 40 times comparing with the JET experiment. Such small amount of injected NG should generate runaway electrons (RE) with rather large probability. For mitigation of the wall damage with these RE, a special sacrificial diaphragm consisting of several W ‘nails’ with a characteristic thickness of 2 cm has been proposed. The diaphragm erosion with RE beam has been roughly estimated from above as less than 0.5 cm per disruption. Taking into account the plasma shielding may decrease erosion ∼10 times.
