Citation
López Navarro, Juan Manuel and Ruiz González, Mariano and Vega, Jesús and Dormido-Canto, Sebastián and Murari, Andrea and Ramírez, Jesús Manuel and Moreno, Raúl and Alves, Diogo and Felton, Robert
(2012).
Results of the JET real-time disruption predictor in the ITER-like wall campaigns.
In: "27th Symposium on Fusion Technology (SOFT)", 24/09/2012 - 28/09/2012, Liege, Belgium. ISBN 0920-3796. pp. 1-7.
Abstract
The impact of disruptions in JET became even more important with the replacement of the previous Carbon Fiber Composite (CFC) wall with a more fragile full metal ITER-like wall (ILW). The development of robust disruption mitigation systems is crucial for JET (and also for ITER). Moreover, a reliable real-time (RT) disruption predictor is a pre-requisite to any mitigation method. The Advance Predictor Of DISruptions (APODIS) has been installed in the JET Real-Time Data Network (RTDN) for the RT recognition of disruptions. The predictor operates with the new ILW but it has been trained only with discharges belonging to campaigns with the CFC wall. 7 realtime signals are used to characterize the plasma status (disruptive or non-disruptive) at regular intervals of 1 ms. After the first 3 JET ILW campaigns (991 discharges), the success rate of the predictor is 98.36% (alarms are triggered in average 426 ms before the disruptions). The false alarm and missed alarm rates are 0.92% and 1.64%.
