# The `Samples_vanadium` Instrument

*McStas: A test instrument using a vanadium cylinder*

## Identification

- **Site:** Tests_samples
- **Author:** Kristian Nielsen and Kim Lefmann
- **Origin:** Risoe
- **Date:** 1998

## Description

```text
This instrument shows the vanadium sample scattering anisotropy.
This is an effect of attenuation of the beam in the cylindrical sample.
```

## Input parameters

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

| Name | Unit | Description | Default |
|------|------|-------------|---------|
| ROT | deg | Rotation angle of the PSD monitor | 0 |

## Links

- [Source code](Samples_vanadium.instr) for `Samples_vanadium.instr`.
- The McStas User manual
- The McStas tutorial

---