| Parameter Name | Units | Type | Default | Description |
| DELTALIMIT | double | -1 | maximum fractional momentum deviation | |
| LOWERFRACTION | double | 0.0 | fraction of lowest-momentum particles to remove | |
| UPPERFRACTION | double | 0.0 | fraction of highest-momentum particles to remove | |
| FIXPLIMITS | long | 0 |
fix the limits in p from LOWERFRACTION and UPPERFRACTION applied to first beam | |
| BEAMCENTERED | long | 0 |
if nonzero, center for DELTALIMIT is average beam momentum |