[ Identification | Description | Input parameters | Links ]
Chopper_simple ComponentIdeal model of a chopper situated at Z=0. If a photon arrives at the chopper plane at a time of t = [t0 +-n*T: t0 +-n*T +tau], where T is the period of the chopper, t0 the initial delay and tau the opening time of the chopper, it is left untouched - otherwise it is ABSORBed. If on a continous source the isfirst parameter may be used. In this case the photon time is _defined_ by the chopper. In other words no photons are absorbed, the photon time is merely sampled within the chopper window. t_rise is the rise-time of the chopper opening giving a trapezoidal shape. Limitations: this component does not take chopper geometry into account. If isfirst only samples in the first chopper opening window. Example: Chopper_simple( t0 = -0.5/M_C, T = 20e-6, tau = 100e-12, xwidth = 1e-4, yheight = 1e-4, isfirst = 1)
| Name | Unit | Description | Default | |
| t0 | s | Initial delay of the opening time | 0 | |
| T | s | Period of the chopper | 1 | |
| tau | s | Opening time of the chopper | 0.1 | |
| xwidth | m | Height of the chopper opening | 0.1 | |
| yheight | m | Width of the chopeper opening | 0.1 | |
| isfirst | 0/1 | Is the chopper the first chopper on a continous source. | 0 | |
| t_rise | s | Rise time of the chopper pulse. | 0 | |
| tjit | 1 | Timing jitter in terms of the opening time tau. For each ray the opening window will be shifted by a random amount within t=[-tjit*.5*tau,tjit*.5*tau] | 0 |
| AT ( | , | , | ) RELATIVE | |||
|---|---|---|---|---|---|---|
| ROTATED ( | , | , | ) RELATIVE |
Chopper_simple.comp.
[ Identification | Description | Input parameters | Links ]
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