[ Identification | Description | Input parameters | Links ]

The MultiDiskChopper Component

Identification

• Site:
• Author: Markus Appel
• Origin: ILL / FAU Erlangen-Nuernberg
• Date: 2015-10-19

Description

Models a disk chopper with a freely configurable slit pattern. For simple applications,
use the DiskChopper component and see the component manual example of DiskChopper GROUPing.
If the chopper slit pattern should be dynamically configurable or a complicated pattern
is to be used as first chopper on a continuous source, use this component.

Width and position of the slits is defined as a list in string parameters so
they can easily be taken from instrument parameters.
The chopper axis is located on the y axis as defined by the parameter delta_y.
When the chopper is the first chopper after a continuous (i.e. time-independent)
source, the parameter isfirst should be set to 1 to increase Monte-Carlo efficiency.


Examples (see parameter definitions for details):
Two opposite slits with 10 and 20deg opening, with the 20deg slit in the beam at t=0.02:
MultiDiskChopper(radius=0.2, slit_center="0;180", slit_width="10;20", delta_y=-0.1,
nu=302, nslits=2, phase=180, delay=0.02)

First chopper on a continuous source, creating pulse trains for one additional revolution
before and after the revolution at t=0:
MultiDiskChopper(radius=0.2, slit_center="0;180", slit_width="10;20", delta_y=-0.1,
nu=302, nslits=2, phase=180, isfirst=1, nrev=1)

Input parameters

Links

• Source code for MultiDiskChopper.comp.

[ Identification | Description | Input parameters | Links ]