torus_solver.biot_savart

torus_solver.biot_savart.biot_savart_surface(surface, K, eval_points, *, mu0=1.2566370614359173e-06, eps=1e-09, chunk_size=256)[source]

Magnetic field B (Tesla) from a surface current density K (A/m).

In continuous form:

B(x) = μ0/(4π) ∬ K(r’) × (x-r’) / norm(x-r’)^3 dA’

Notes

  • eps is a small softening length to avoid numerical issues when points are extremely close to the surface.

  • This routine is JAX-differentiable w.r.t. K and eval_points.

Return type:

Array

Parameters:

  • surface (TorusSurface)

  • K (Array)

  • eval_points (Array)

  • mu0 (float)

  • eps (float)

  • chunk_size (int | None)