Update default value of min_tick_distance in potential calculation

[fhagemann]

SolidStateDetectors.jl/src/Simulation/Simulation.jl

Lines 851 to 878 in 652e8ee

	min_tick_distance::NTuple{3, T} = if CS == Cylindrical
	if !ismissing(min_tick_distance)
	if min_tick_distance isa LengthQuantity
	world_r_mid = (sim.world.intervals[1].right + sim.world.intervals[1].left)/2
	min_distance_z = min_distance_r = T(to_internal_units(min_tick_distance))
	min_distance_r, min_distance_z / world_r_mid, min_distance_z
	else
	T(to_internal_units(min_tick_distance[1])),
	T(to_internal_units(min_tick_distance[2])),
	T(to_internal_units(min_tick_distance[3]))
	end
	else
	(T(1e-5), T(1e-5) / (0.25 * grid.axes[1][end]), T(1e-5))
	end
	else
	if !ismissing(min_tick_distance)
	if min_tick_distance isa LengthQuantity
	min_distance = T(to_internal_units(min_tick_distance))
	min_distance, min_distance, min_distance
	else
	T(to_internal_units(min_tick_distance[1])),
	T(to_internal_units(min_tick_distance[2])),
	T(to_internal_units(min_tick_distance[3]))
	end
	else
	(T(1e-5), T(1e-5), T(1e-5))
	end
	end

Right now, we set the default value for min_tick_distance to 1e-5, which are 10µm. Any structures finer than 10µm will not be well resolved in simulations using the default values. We should think about adjusting this value (and maybe max_tick_ratio) to something less hard-coded such that the default values describe any simulation (and not just "large scale" simulations) best.