[ Identification | Description | Input parameters | Links ]

# The `ILL_H142_D33` Instrument

A simplified H142 cold guide model at the ILL, with a simple D33 model at the end

## Identification

- Site: ILL
- Author: FARHI Emmanuel (farhi@ill.fr)
- Origin: ILL
- Date: 2012

## Description

    This model decribes a simiplified H142 cold guide at the ILL, with D33.

    The D33 Massive dynamic q-range small-angle diffractometer is a Small-Angle Neutron
    Scattering instrument for the characterization of samples with typical sizes
    varying from the nanometer scale to few tenth of micrometer. In addition to a
    standard monochromatic mode of operation, D33 offers a time of flight mode (TOF)
    to cover an enhanced dynamic q-range qmax/qmin in one instrument setting. High
    magnetic fields, up to 17 T at the sample position, beam polarization and 3He
    spin analysis, facilitate and expand studies of magnetism and allow a more
    quantitative analysis of spin incoherent samples. The high flux allows for
    kinetic experiments with time resolution of the order of few milliseconds.

## Input parameters

Parameters in boldface are required; the others are optional.

Name | Unit | Description | Default
lambda |  | central wavelength band for guide illumination [Angs] | 14
dlambda |  | half width of guide wavelength band [Angs] | 1.4
m1 |  | m-coating for 1st guide section | 1
m2 |  | m-coating for 2nd guide section | 1
m3 |  | m-coating for 3th guide section | 1
m4 |  | m-coating for 4th guide section | 1
diaphragm |  | diaphragm diameter between section 3 and 4; use 0 to remove [cm] | 0

## Links

- Source code for `ILL_H142_D33.instr`.

[ Identification | Description | Input parameters | Links ]