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McStas: ILL_IN5 Instrument at ILL

[ Identification | Description | Input parameters | Output parameters | Links ]

The ILL_IN5 Instrument

The IN5B instrument: chopper system + sample + PSD and tof detector, with special resolution options


  • Site: ILL
  • Author: E. Farhi, J. Ollivier, Celia Castan Guerrero
  • Origin: ILL
  • Date: September 2018
  • Version:(Unknown)


 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 60*frequency [rpm] chopper speed 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


[ Identification | Description | Input parameters | Output parameters | Links ]

Generated automatically by McDoc, Peter Willendrup <> / Fri May 7 10:17:14 2021

Last Modified: Friday, 07-May-2021 12:17:14 CEST
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