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

The Res_sample Component

Sample for resolution function calculation.

Identification

Description

An inelastic sample with completely uniform scattering in both Q and
energy. This sample is used together with the Res_monitor component and
(optionally) the mcresplot front-end to compute the resolution function of
triple-axis or inverse-geometry time-of-flight instruments.

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, zthick.

The scattered neutrons will have directions towards a given disk and
energies betweed E0-dE and E0+dE.
This target area 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: Res_sample(radius_i=0.001,radius_o=0.02,h=0.4,focus_r=0.05,
    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
radius_i m Inner radius of hollow cylinder in (x,z) plane, or width of box along X 0
radius_o m Outer radius of hollow cylinder 0.01
h m Height of box or cylinder along Y 0.05
focus_r m Radius of sphere containing target. 0.05
E0 meV Center of scattered energy range 14
dE meV half width of scattered energy range 2
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
yheight m vert.. dimension of sample, as a height 0
zthick m thickness of sample 0
int target_index 0

Output parameters

Name Unit Description Default
res_struct  

Links


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

Generated automatically by McDoc, Peter Willendrup <peter.willendrup@risoe.dk> / Feb 28 2006