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Adaptive Mesh Refinement cfg

All parameters under [AMR]

• max_spatial_level: Maximum AMR level for both static and adaptive refinement

• refine_radius: Maximum distance from origin to refine cells, default unlimited. On static refinement this should be less than gridbuilder.x_min to avoid tail box refinement on the back wall.

• adapt_refinement: Set true to use adaptive refinement

• use_alpha1: Use the maximum of dimensionless gradients as a refinement index, default true (is used if adapt_refinement is set)

• use_alpha2: Use J/B_perp (measuring current sheets) as a refinement index, default true (is used if adapt_refinement is set)

• alpha1_refine_threshold, alpha_2_refine_threshold: Minimum values of alpha to refine a cell, default 0.5

• alpha1_coarsen_threshold, alpha_2_coarsen_threshold: Maximum values of alpha to coarsen a cell, default half of refine threshold

• refine_cadence: Adapt refinement in the grid every N load balances, default 5 (so every 5th load balance)

• refine_after: Minimum time to start refinement, allows you to initialize the grid on minimal refinement. Default 0, i.e. no minimum time

• alpha1_dX_weight: Multiplier for each constituent variable in the calculation of alpha1, default 1.