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The visible camera system EDICAM (Event Detection Intelligent Camera),recently installed on JT-60SA, is simulated to assess whether it can be usedfor measuring synchrotron radiation from relativistic runaway electrons. Inthis simulation, the SOFT synthetic synchrotron diagnostic framework is used tocompute the synthetic synchrotron camera images from a JT-60SA-like disruptionmodelled with the DREAM disruption simulation code. In the studied scenario, alarge amount of argon is added to the plasma, and a disruption is simulated bystarting a prescribed exponential temperature drop and finishing with furthercooling provided by the argon in a self-consistent simulation of the currentquench. The background plasma evolution is calculated by DREAMself-consistently with the fast electron population, which is modelledkinetically. The resulting runaway electron distribution function along withthe parameters of the EDICAM visible camera system are used as an input to theSOFT framework to assess the feasibility of the camera for runaway electrondetection. We find that the runaway electron beam formed in the disruption canproduce synchrotron radiation observable by the EDICAM system, thus enablingthe use of the EDICAM for the characterization of runaway electron beams.

Feasibility of the EDICAM camera for runaway electron detection in JT-60SA disruptions