[ Identification | Description | Input parameters | Links ]

# The `TOFRes_sample` Component

Sample for TOF resolution function calculation.

## Identification

- Site:
- Author: KL, 10 October 2004
- Origin: Risoe
- Date: 1999

## 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:
    1. Hollow cylinder (Please note that the cylinder **must** be specified with both
    a radius and a wall-thickness!)
    2. A massive, rectangular box specified with dimensions xwidth, yheight, zdepth.
    (i.e. **withouht** a thickness)

    hollow cylinder shape **must** be specified with both a radius and a wall-thickness.
    The box is

    The scattered neutrons will have directions towards a given target and
    detector arrival time in an interval of time_width centered on 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, time_bin=3e4, time_width=200, 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 |
f | 1 | Adaptive time-shortening factor | 50 |
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 |

AT ( | , | , |  | ) RELATIVE |  |
ROTATED ( | , | , |  | ) RELATIVE |

## Links

- Source code for `TOFRes_sample.comp`.

[ Identification | Description | Input parameters | Links ]