# The `Test_capillary` Instrument

*McXtrace: Unit test instrument for the capillary tube component.*

## Identification

- **Site:** Tests_optics
- **Author:** E. B: Knudsen
- **Origin:** DTU Physics
- **Date:** July 2015.

## Description

```text
Very simple setup to compare intensities diffracted by Monochromators.
It shows that implementations are equivalent.
```

## Input parameters

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

| Name | Unit | Description | Default |
|------|------|-------------|---------|
| TL | m | length of capillary tube | 0.1 |
| TR | m | radius of capillary tube | 1e-4 |
| L1 | m | disatnce from source to capillary tube entrance | 3 |

## Links

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

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