Speaker
Description
A scintillating fast-ion loss detector [1] has successfully undergone its conceptual design review to be installed for the ITER D-T operation. The detector’s probe head, in its measuring position, is exposed to heat loads in the order of MW/m2. The thermal loads on the detector’s probe head under normal operational conditions have been determined using the SMITER code [2] for the thermal convective losses, the nuclear heating distribution in its port, an exponential radiative decay [3] and a conservative flat value for the fast-ion losses . A finite elements model has been developed to obtain the temperature evolution from these conditions and the resulting thermomechanical stress. As the model includes the scintillating plate, its efficiency during operation can be inferred from the temperature distribution. The analysis shows that the thermal and/or mechanical limits of the system are not reached and that the induced stress is not enough to produce fatigue damage over the expected life of the detector.
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