[ Identification | Description | Input parameters | Links ]

# The `ILL_IN5_Spots` Instrument

In this version equipped with the Spot_sample from SNS, useful for resolution considerations.

## Identification

- Site: ILL
- Author: E. Farhi, J. Ollivier, Celia Castan Guerrero, edits by P. Willendrup
- Origin: ILL
- Date: September 2018

## Description

    The IN5@ILL TOF spectrometer from chopper system to final detector, with sample.
    The detector model includes Fe housing and tube cross talk absorbing masks
    with angle restriction (neutrons that scatter in Fe in front of a tube and
    enter a different tube are absorbed). This model does not include the H16 guide.

    Example: lambda=4.5 Detector: Det_PSD_I=1.3e6

## Input parameters

Parameters in boldface are required; the others are optional.

Name | Unit | Description | Default
lambda | AA | mean incident wavelength | 4.5
dlambda | AA | wavelength half width. | 0.05
speed | rpm | chopper speed (60*frequency) | 8500
ratio | 1 | velocity of chopper3 = velocity of chopper1 * ratio | 0.5
housing | string | material used as detector housing. Use 0 or NULL for none. | "Fe.laz"
coh | string | sample coherent data file or NULL. Use powder LAZ/LAU or SQW file. | "Y3Fe5O12_YIG.laz"
inc | string | sample incoherent Sqw data file or NULL | "NULL"
thickness | m | thickness of sample. 0=filled | 0
height | m | height of sample. 0=sphere | 0.025
radius | m | radius of sample (outer). | 0.005
order | 1 | order for scattering in sample. O=all, 1=single | 0
wspot | meV | energy of dirac resolution spots | 1
ttspot | deg | direction of dirac resolution spots | 45
nspots | 1 | number of direc resolution spots | 0
RESO | 1 | flag to indicate constant Q-e dirac grid ala IN4 model | 1

## Links

- Source code for `ILL_IN5_Spots.instr`.
- The IN5@ILL cold time of flight instrument

[ Identification | Description | Input parameters | Links ]