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

The TOFRes_sample Component

Sample for TOF resolution function calculation.

Identification

Description

An inelastic sample with completely uniform scattering in both solid angle
and energy. This sample is used together with the TOFRes_monitor component
and (optionally) the mcresplot front-end to compute the resolution
function of all time-of-flight instruments.
The method of time focusing is used to optimize the simulations.

The shape of the sample is either a hollow cylinder or a rectangular box. The
hollow cylinder shape is specified with an inner and outer radius.
The box is specified with dimensions xwidth, yheight, zdepth.

The scattered neutrons will have directions towards a given target and
energies between E0-dE and E0+dE, where E0 is calculated from the position
and width of the time bin.
This target area is default disk shaped, but may also be rectangular
if specified focus_xw and focus_yh
or focus_aw and focus_ah, respectively in meters and degrees.
The target itself is either situated according to given coordinates (x,y,z),
or setting the relative target_index of the component to focus at
(next is +1). This target position will be set to its AT position.
When targeting to centered components, such as spheres or cylinders,
define an Arm component where to focus at.

Example: TOFRes_sample(thickness=0.001, radius=0.01, yheight=0.04, focus_xw=0.025, focus_yh=0.025, E0=14.6,dE=2, target_x=0, target_y=0, target_z=1)

Input parameters

Parameters in boldface are required; the others are optional.
Name Unit Description Default
thickness m Thickness of hollow cylinder in (x,z) plane 0
radius m Outer radius of hollow cylinder 0.01
yheight m vert. dimension of sample, as a height 0.05
focus_r m Radius of sphere containing target 0.05
time_bin us position of time bin 20000
time_width us width of time bin 10
target_x 0
target_y m position of target to focus at 0
target_z .5
focus_xw m horiz. dimension of a rectangular area 0
focus_yh m vert. dimension of a rectangular area 0
focus_aw deg horiz. angular dimension of a rectangular area 0
focus_ah deg vert. angular dimension of a rectangular area 0
xwidth m horiz. dimension of sample, as a width 0
zdepth m depth of sample 0
target_index 1 relative index of component to focus at, e.g. next is +1 0

Output parameters

Name Unit Description Default
res_struct  
f  
E0  
dE  

Links


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

Generated automatically by McDoc, Peter Willendrup <peter.willendrup@risoe.dk> / Fri Sep 11 06:49:10 2020