The `Test_capillary` Instrument

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

Unit test instrument for the capillary tube component.

Identification

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

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