# The `Test_box` Instrument

*McStas: Simple test instrument for Union box component.*

## Identification

- **Site:** Tests_union
- **Author:** Mads Bertelsen
- **Origin:** University of Copenhagen
- **Date:** September 2015

## Description

```text
One of the union geometries that can be used in conjuction
with the others to create a complex geometry. The priority needs to
be set, and when two or more geometries overlap, the one with highest
priority determines what material is simulated in that region.
```

## Input parameters

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

| Name | Unit | Description | Default |
|------|------|-------------|---------|

## Links

- [Source code](Test_box.instr) for `Test_box.instr`.

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