[ Identification | Description | Input parameters | Links ]

# The `Test_focus` Instrument

Focus testing, comparing Single_crystal and Monochromator_curved

## Identification

- Site: Tests_optics
- Author: Tobias Weber (tweber@ill.fr)
- Origin: ILL
- Date: 3-Feb-2018

## Description

    For mono_ideal=0 the Single_crystal component is used as monochromator,
    for mono_ideal=1 Monochromator_curved is used with the same settings.

    The curvature of the monochromator can be set using mono_curvh and mono_curvv
    for horizontal and vertical focusing, respectively.
    For mono_curvh=0, mono_curvv=0 the monochromator is flat.
    For mono_curvh=-1, mono_curvv=-1 optimal horizontal and vertical focusing is chosen.

## Input parameters

Parameters in boldface are required; the others are optional.

Name | Unit | Description | Default
src_lam | AA | Source mean wavelength | 4.5
src_dlam | AA | Source wavelength spread | 1.0
mono_ideal |  | Selection of mono-model 0=Single_crystal, 1=Monochromator_curved | 0
mono_curvh | m | Monochromator horizontal curvature. -1: optimal, 0: flat | -1
mono_curvv | m | Monochromator vertical curvature -1: optimal, 0: flat | -1

## Links

- Source code for `Test_focus.instr`.

[ Identification | Description | Input parameters | Links ]