@article{7743, author = {C. Reux and M. Lehnen and U. Kruezi and S. Jachmich and P. Card and K. Heinola and E. Joffrin and P. J. Lomas and S. Marsen and G. Matthews and V. Riccardo and F. Rimini and P. de Vries}, title = {Use of the disruption mitigation valve in closed loop for routine protection at JET}, abstract = {Disruptions are a major concern for next-generation tokamaks, including ITER. Heat loads, electromagnetic forces and runaway electrons generated by disruptions have to be mitigated for a reliable operation of future machines. Massive gas injection is one of the methods proposed for disruption mitigation. This article reports the first use of massive gas injection as an active disruption protection system at JET. During the 2011–2012 campaigns, 67 disruptions have been mitigated by the disruption mitigation valve (DMV) following a detection by mode lock amplitude and loop voltage changes. Most of disruptions where the valve was intended to be used were successfully mitigated by the DMV, although at different stages of the typical slow disruptions of the ITER-like wall. The fraction of magnetic and thermal energy radiated during the disruption was found to be increased by the action of the DMV. Vertical forces dispersion was also reduced. No non-sustained breakdown was observed following pulses terminated by the disruption mitigation valve.}, year = {2013}, journal = {Fusion Engineering and Design}, volume = {88}, number = {6–8}, pages = {1101 - 1104}, url = {http://www.sciencedirect.com/science/article/pii/S0920379612005832}, doi = {http://dx.doi.org/10.1016/j.fusengdes.2012.12.026}, note = {Proceedings of the 27th Symposium On Fusion Technology (SOFT-27); Liège, Belgium, September 24-28, 2012}, language = {eng}, }