# The `External_component_test` Instrument

*McStas: Inserts external component in Union system with exit volumes and number_of_activations*

## Identification

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

## Description

```text
Demonstration of the use of "number_of_activations" and exit volumes to
include a regular McStas component in an ensemble of Union components.
```

## Input parameters

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

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

## Links

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

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