velpert_amplitude         real 1.e5
velpert_amplitude         real 1.e6
velpert_radius            real 2.e7
velpert_scale             real 1.e7
velpert_steep             real 1.e5
tag_density_1             real 5.e7
tag_density_2             real 1.e8
tag_density_3             real 1.e8
tag_density_3             real 1.e9
particle_temp_cutoff      real 6.e8
particle_tpert_threshold  real 2.e7
