theta_grid_gridgen Module

Does the related namelist exist in the target input file?

Used to hold the specific index of numbered namelists

Do we want to skip the read step in init?

Do we want to skip the broadcast step in init?

Do we want to skip the smaart defaults in init?

Relative weighting of pitch-angle metric to $\theta$ metric

Consider when the right grid point is equal to the target bmag.

Parameter for weighted resolution in theta. Each theta grid point contributes to the resolution metric according to the function $$1 + deltaw *[ 1 / (1 + [theta-thetamax]**2/widthw**2) + 1 / (1 + [theta+thetamax]**2/widthw**2)]$$ which has peaks at theta = +/- thetamax and deltaw controls the relative weighting of the theta dependent contribution.

Maximum difference between neighbouring points for determining if a point is an extremum.

Used to set a "bonus" contribtion to resolution at B extrema with an even number of theta grid points. Those with an odd number of points and the assumed extrema at -pi have a metric of 1e20. Here extrknob can be used to bias the algorithm towards keeping extrema with an even number of points.

Number of points between original grid points to oversample $\theta$ by

Tension to use in interpolating splines for regrid of geometrical quantities Defaults to tension if not set.

If true then skip gridgen call and instead just use the existing grid.

Tension for $B$ spline

Parameter for weighted resolution in theta. Each theta grid point contributes to the resolution metric according to the function $$1 + deltaw *[ 1 / (1 + [theta-thetamax]**2/widthw**2) + 1 / (1 + [theta+thetamax]**2/widthw**2)]$$ which has peaks at theta = +/- thetamax.

Parameter for weighted resolution in theta. Each theta grid point contributes to the resolution metric according to the function $$1 + deltaw *[ 1 / (1 + [theta-thetamax]**2/widthw**2) + 1 / (1 + [theta+thetamax]**2/widthw**2)]$$ which has peaks at theta = +/- thetamax and widthw controls the scale length of the peaks.