[ Identification | Description | Input parameters | Links ]

# The `ILL_H22_VIVALDI` Instrument

The VIVALDI Laue diffractometer on the H22 curved thermal guide at the ILL

## Identification

- Site: ILL
- Author: FARHI Emmanuel (farhi@ill.fr)
- Origin: ILL
- Date: June, 2008

## Description

    VIVALDI (Very-Intense, Vertical-Axis Laue DIffractometer) provides a tool for
    development of new diffraction experiments, and is complementary to other ILL
    single-crystal diffractometers. Fields of interest for experiments on VIVALDI
    include magnetism, charge density waves, high-pressure studies and structural
    phase transitions. VIVALDI allows rapid preliminary investigation of new
    materials, even when only small single crystals are available. The detector is
    also suitable for some types of diffuse scattering experiments on a
    monochromatic beam.

    VIVALDI is located at the end of the thermal guide H22. The full thermal
    spectrum can be accepted without detrimental overlap of reflections for
    primitive unit cells up to 25 Angs on edge.

    This model include a cryostat and container description, with a crystal sample.

## Input parameters

Parameters in boldface are required; the others are optional.

Name | Unit | Description | Default
lambda | AA | mean incident wavelength. | 3
dlambda | AA | wavelength full width. | 2.2
crystal | str | File name for crystal description (LAU) | "YBaCuO.lau"
container | str | File name for sample-container material description | "V.laz"
verbose | 1 | Print DIF configuration. 0 to be quiet | 1

## Links

- Source code for `ILL_H22_VIVALDI.instr`.

[ Identification | Description | Input parameters | Links ]