Modeling of AC Losses and Simulation of Their Impact on JT-60SA TF Magnets During Commissioning
2021
AC losses deposited in the magnets during JT-60SA commissioning and operation will both affect the local stability of the conductor and act as a load on the cryogenic system. Our objective is thus to establish a detailed modeling of AC losses generated in the magnets by different current scenarios. Since the TF coils have been tested in the Cold Test Facility (CTF) and will be the first ones to be fully energized during the commissioning, we have focused our work on the AC losses deposited in the TF; this enables us to assess the relevancy of our modeling against the CTF data. We also present thermohydraulic simulations conducted with TACTICS (a CEA tool coupling THEA and Cast3m) to both have a view on heat load propagation inside TF winding pack and estimate the impact on the helium temperature of the AC losses generated by the TF fast discharge during the cold tests and the commissioning.
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