{
    "num_neutrons": 10000000000,
    "block_size": 1000,

    "gun_pos": [-1.0e-1, 0.0, 0.0],
    "gun_target": [0.0, 0.0, 0.0],
    "gun_spread": 2.0,

    "scat_coeff": 1e-1,
    "abs_coeff": 1e-1,

    "mins": [-0.5e-1, -0.5e-1, -0.5e-1],
    "maxs": [0.5e-1, 0.5e-1, 0.5e-1],
    "num_voxels": [32, 32, 32]
}