3D heat flux modelling of rotating error field correction applied to the SPARC tokamak with the HEAT code*

The latest release of the HEAT code is utilized to calculate the heat loads

resulting from error field correction coils and 3D rotating perturbation fields

applied to the SPARC tokamak. Previously employed to simulate axisymmetric

heat flux on 3D plasma facing components (PFCs), the HEAT code can now

predict 3D heat flux in non-axisymmetric plasmas using M3D-C1 perturbed

equilibrium. This is achieved via a new HEAT module which leverages the 3D

field capabilities of MAFOT, the field line tracer in HEAT. The resulting heat

flux is assigned using the magnetic footprint and a new heat flux

layer model, which extend the Eich-profile to 3D non-axisymmetric plasmas. In

the present study, the new model is applied to the SPARC tokmak to predict

the 3D heat flux from the mid-plane error field correction coils. The comparison

with the unperturbed case shows significant changes in shape and intensity of the

heat flux profile. The utilization of a n = 1 3D field generates a secondary heat

flux peak, whose intensity depends on the toroidal location. The application of

rotating 3D error field correction as heat flux mitigation strategy is also explored

for different values of the rotation frequency.