[ Identification | Description | Input parameters | Links ]

# The `ILL_H53_IN14` Instrument

IN14 cold triple-axis machine (TAS) on guide H53 with sample

## Identification

- Site: ILL
- Author: Emmanuel Farhi
- Origin: ILL (France)
- Date: 2006

## Description

    IN14 is a high flux cold neutron three-axis spectrometer situated on a straight
    58Ni coated guide looking at the horizontal cold source. IN14 is equipped with
    a vertically curved (002) pyrolytic graphite monochromator. A polarising bender
    can be inserted after the monochromator, for polarised neutron work.

    The sample, analyser and detector units are mounted on standard Tanzboden
    modules and the distance between these units may be changed if necessary. For
    sample positioning, two motorized arcs (+/- 20deg), and two horizontal
    translation tables (+/- 10 mm) are available. Soller collimators can be easily
    inserted before and after the sample, and before the detector.

    Three horizontally focusing analysers are available: (002) pyrolytic graphite,
    bent Si(111), and Heusler (111) for polarised neutrons.

    In this TAS configuration, PG002 is used as monochromator analyser,
    with a single type detector.

## Input parameters

Parameters in boldface are required; the others are optional.

Name | Unit | Description | Default
KI | Angs-1 | central wavevector for incoming neutrons | 1.55
QM | Angs-1 | wavevector transfer modulus at the sample | 1.0
EN | meV | energy transfer at the sample | 0.0
verbose |  | toggle verbose mode | 1
WM | m | Width of monochromator | 0.15
HM | m | Height of monochromator | 0.12
NHM | 1 | Number of vertical slabs composing the monochromator | 1
NVM | 1 | Number of horizontal slabs composing the monochromator | 9
RMV | m | Monochromator vertical curvature, 0 for flat, -1 for automatic setting | -1
DM |  |  | 3.355
WA | m | Width of analyzer | 0.20
HA | m | Height of analyzer | 0.10
NHA | 1 | Number of horizontal slabs composing the analyzer | 11
NVA | 1 | Number of vertical slabs composing the analyzer | 1
RAV | m | Analyzer vertical curvature, 0 for flat, -1 for automatic setting | 0
RAH | m | Analyzer horizontal curvature, 0 for flat, -1 for automatic setting | -1
DA | AA | Analyzer lattice spacing | 3.355
SM | 1:left, -1:right | Scattering sense of beam from Monochromator | 1
SS | 1:left, -1:right | Scattering sense of beam from Sample | -1
SA | 1:left, -1:right | Scattering sense of beam from Analyzer | 1
L1 | m | Source-Monochromator distance. Contains 1st Collimator | 7.0
L2 | m | Monochromator-Sample distance. Contains 2nd Collimator | 2.12
L3 | m | Sample-Analyzer distance. Contains 3rd Collimator | 1.37
L4 | m | Analyzer-detector distance. Contains 4th Collimator | 0.7

## Links

- Source code for `ILL_H53_IN14.instr`.
- The IN14 TAS at the ILL

[ Identification | Description | Input parameters | Links ]