LOCUST-GPU predictions of fast-ion transport and power loads due to ELM-control coils in ITER

Abstract The graphics processing unit (GPU) version of the Lorentz-orbit code for use in stellarators and tokamaks ( LOCUST ) has been applied to study fast-ion transport loss caused by resonant magnetic perturbations high-performance Q = 10 ITER baseline scenario. unique computational efficiency is exploited calculate impact application ITER's edge-localised mode (ELM) control coil system on neutral beam heating efficiency, as well producing detailed predictions resulting plasma-facing component power loads, a variety operational parameters—the fundamental toroidal number n 0 , spectrum absolute phase imposed perturbation. feasibility continually rotating assessed shown be effective at reducing time-averaged loads. Through careful adjustment relative perturbation three rows coils, peak loads are found correlate with reductions injection (NBI) 3 fields. Adjusting this way can increase total NBI approximately 2%–3% reduce up 0.43 MW m ?2 . From point view confinement, ELM fields preferred overall 4 In addition, implementation 3D also verified comparison SPIRAL DIII-D discharge ITER-similar shaping