# The `Samples_Incoherent_off` Instrument

*McStas: Instrument to demonstrate the usage of OFF shape samples with totally absorbing material.*

## Identification

- **Site:** Tests_samples
- **Author:** Reynald ARNERIN
- **Origin:** ILL
- **Date:** June 12th, 2008

## Description

```text
Instrument to demonstrate the usage of OFF shape samples with totally absorbing material.
The Incoherent component is here used with a description file. The shape may be scaled
forcing the size of the bounding box.
```

## Input parameters

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

| Name | Unit | Description | Default |
|------|------|-------------|---------|
| geometry | string | Name of the OFF file describing the sample shape | "socket.off" |

## Links

- [Source code](Samples_Incoherent_off.instr) for `Samples_Incoherent_off.instr`.
- http://shape.cs.princeton.edu/benchmark/documentation/off_format.html

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