desc.magnetic_fields.ToroidalMagneticField

class desc.magnetic_fields.ToroidalMagneticField(B0, R0)Source

Magnetic field purely in the toroidal (phi) direction.

Magnitude is B0*R0/R where R0 is the major radius of the axis and B0 is the field strength on axis

Parameters:

• B0 (float) – field strength on axis

• R0 (float) – major radius of axis

Methods

compute_Bnormal(surface[, eval_grid, ...])	Compute Bnormal from self on the given surface.
compute_magnetic_field(coords[, params, ...])	Compute magnetic field at a set of points.
copy([deepcopy])	Return a (deep)copy of this object.
equiv(other)	Compare equivalence between DESC objects.
load(load_from[, file_format])	Initialize from file.
pack_params(p)	Convert a dictionary of parameters into a single array.
save(file_name[, file_format, file_mode])	Save the object.
save_BNORM_file(surface, fname[, basis_M, ...])	Create BNORM-style .txt file containing Bnormal Fourier coefficients.
save_mgrid(path, Rmin, Rmax, Zmin, Zmax[, ...])	Save the magnetic field to an mgrid NetCDF file in "raw" format.
unpack_params(x)	Convert a single array of concatenated parameters into a dictionary.

Attributes

B0	field strength on axis.
R0	major radius of axis.
dim_x	total number of optimizable parameters.
dimensions	dictionary of integers of sizes of each optimizable parameter.
optimizable_params	string names of parameters that have been declared optimizable.
params_dict	dictionary of arrays of optimizable parameters.
x_idx	arrays of indices for each parameter in concatenated array.