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McXtrace - An X-ray ray-trace simulation package

Synchrotron SOLEIL DTU Physics

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McStas: Chopper_simple

[ Identification | Description | Input parameters | Output parameters | Links ]

The Chopper_simple Component

Ideal chopper

Identification

  • Site:
  • Author:
  • Origin: Risoe
  • Date: August 2011

Description

Ideal 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.

Input parameters

Parameters in boldface are required; the others are optional.
NameUnitDescriptionDefault
t0sInitial delay of the opening time0
TsPeriod of the chopper1
tausOpening time of the chopper0.1
xwidthmheight of the chopper opening0.1
yheightmwidth of the chopeper opening0.1
isfirst is the chopper the first chopper on a continous source.0
t_rise0
tjit 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

Output parameters

Parameters in boldface are required; the others are optional.
NameUnitDescriptionDefault

Links


[ Identification | Description | Input parameters | Output parameters | Links ]

Generated on 2022-02-07 20:46:44


Last Modified: Wednesday, 11-May-2022 22:46:11 CEST
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