Input Variables
- PoissonSolverMGPostsmoothingSteps
 - PoissonSolverMGPresmoothingSteps
 - PoissonSolverMGRelaxationFactor
 - PoissonSolverMGRelaxationMethod
 - PoissonSolverMGRestrictionMethod
 - CalculateSelfInducedMagneticField
 - UserDefinedConstantSpatialMaxwellField
 - UserDefinedInitialMaxwellStates
 - UserDefinedMaxwellExternalCurrent