| Parameter Name | 
Units | 
Type | 
Default | 
Description | 
| L | 
  | 
double | 
0.0 | 
length | 
| RAMP_TIME | 
  | 
double | 
1e-09 | 
time to ramp to full strenth | 
| TIME_OFFSET | 
  | 
double | 
0.0 | 
offset of ramp-start time | 
| VOLTAGE | 
  | 
double | 
0.0 | 
maximum voltage between plates due to ramp | 
| GAP | 
  | 
double | 
0.01 | 
gap between plates | 
| STATIC_VOLTAGE | 
  | 
double | 
0.0 | 
static component of voltage | 
| TILT | 
  | 
double | 
0.0 | 
rotation about longitudinal axis | 
| ACCURACY | 
  | 
double | 
0.0001 | 
integration accuracy | 
| X_MAX | 
  | 
double | 
0.0 | 
x half-aperture | 
| Y_MAX | 
  | 
double | 
0.0 | 
y half-aperture | 
| DX | 
  | 
double | 
0.0 | 
misalignment | 
| DY | 
  | 
double | 
0.0 | 
misalignment | 
| PHASE_REFERENCE | 
  | 
long | 
0 | 
phase reference number (to link with other time-dependent elements) | 
| N_STEPS | 
  | 
long | 
100 | 
number of steps (for nonadaptive integration) | 
| METHOD | 
  | 
STRING | 
runge-kutta | 
integration method (runge-kutta, bulirsch-stoer, non-adaptive runge-kutta, modified midpoint) | 
| FIDUCIAL | 
  | 
STRING | 
t,median | 
{t p},{median min max ave first light} (e.g., "t,median") |