IXTfermi chopper

Nearest equivalent NeXus class: NXfermi_chopper

Structure

The elements of the object are as follows:

Field	Type	Description
base	IXTbase	internal use
name	char	Name of the slit package eg. sloppy
distance	real	Distance of the package from the sample (m)
frequency	real	Frequency of rotation (Hz)
period	real	Period of chopper rotation (s) (1/frequency)
radius	real	moderator thickness (m)
curvature	real	angle of normal to incident beam (rad)
slit_width	real	Slit width (m) (fermi)
slit_spacing	real	Spacing between slit centres (m)
blade_width	real	Thickness of neutron absorbing slat
width	real	Width of aperture (m)
height	real	Height of aperture (m)
energy	real	Energy of neutrons transmitted by chopper (meV)

F90 syntax

use IXMfermi_chopper

type(IXTfermi_chopper):: monochromator
type(IXTstatus):: status

Operations

The following operations may be performed on this data type:

• General Operations
• Special Subroutines

Class Specific Operations:

• IXFtransmission_fermi_chopper
• IXFtransmission_odd_fermi_chopper
• IXFvariance_fermi_chopper
• IXFvariance_odd_fermi_chopper