The impact of the ITER-like wall at JET on disruptions
Label | Value |
---|---|
Author | |
Abstract |
The new full-metal ITER-like wall (ILW) at JET was found to have a profound impact on the physics of disruptions. The main difference is a significantly lower fraction (by up to a factor of 5) of energy radiated during the disruption process, yielding higher plasma temperatures after the thermal quench and thus longer current quench times. Thus, a larger fraction of the total energy was conducted to the wall resulting in larger heat loads. Active mitigation by means of massive gas injection became a necessity to avoid beryllium melting already at moderate levels of thermal and magnetic energy (i.e. already at plasma currents of 2 MA). A slower current quench, however, reduced the risk of runaway generation. Another beneficial effect of the ILW is that disruptions have a negligible impact on the formation and performance of the subsequent discharge. |
Year of Publication |
2012
|
Journal |
Plasma Physics and Controlled Fusion
|
Volume |
54
|
Number |
12
|
Number of Pages |
124032
|
URL | |
DOI | |
PId |
1e0b08fe9823c2528fcb1a3775b20f30
|
Alternate Journal |
Plasma Phys. Control. Fusion
|
Label |
OA
|
Journal Article
|
|
Download citation |