3.3.19. NXfermi_chopper

Status:

base class, extends NXobject, version 1.0

Description:

Description of a Fermi chopper, possibly with curved slits.

Symbols:

No symbol table

Groups cited:

NXgeometry

Structure:

type: NX_CHAR

Fermi chopper type

rotation_speed: NX_FLOAT {units=NX_FREQUENCY}

chopper rotation speed

radius: NX_FLOAT {units=NX_LENGTH}

radius of chopper

slit: NX_FLOAT {units=NX_LENGTH}

width of an individual slit

r_slit: NX_FLOAT {units=NX_LENGTH}

radius of curvature of slits

number: NX_INT {units=NX_UNITLESS}

number of slits

height: NX_FLOAT {units=NX_LENGTH}

input beam height

width: NX_FLOAT {units=NX_LENGTH}

input beam width

distance: NX_FLOAT {units=NX_LENGTH}

distance

wavelength: NX_FLOAT {units=NX_WAVELENGTH}

Wavelength transmitted by chopper

energy: NX_FLOAT {units=NX_ENERGY}

energy selected

absorbing_material: NX_CHAR

absorbing material

transmitting_material: NX_CHAR

transmitting material

(geometry): NXgeometry

geometry of the fermi chopper

Source:

Automatically generated from https://github.com/nexusformat/definitions/blob/master/base_classes/NXfermi_chopper.nxdl.xml