3.3.2.4. NXdirecttof

Status:

application definition, extends NXtofraw

Description:

This is a application definition for raw data from a direct geometry TOF spectrometer

Symbols:

No symbol table

Groups cited:

NXdisk_chopper, NXentry, NXfermi_chopper, NXinstrument

Structure:

entry: (required) NXentry

title: (required) NX_CHAR

start_time: (required) NX_DATE_TIME

definition: (required) NX_CHAR

Official NeXus NXDL schema to which this file conforms

Obligatory value: NXdirecttof

(instrument): (required) NXinstrument

We definitly want the rotation_speed and energy of the chopper. Thus either a fermi_chopper or a disk_chopper group is required.

fermi_chopper: (optional) NXfermi_chopper

rotation_speed: (required) NX_FLOAT {units=NX_FREQUENCY}

chopper rotation speed

energy: (required) NX_FLOAT {units=NX_ENERGY}

energy selected

disk_chopper: (optional) NXdisk_chopper

rotation_speed: (required) NX_FLOAT {units=NX_FREQUENCY}

chopper rotation speed

energy: (required) NX_FLOAT {units=NX_ENERGY}

energy selected

NXDL Source:

https://github.com/nexusformat/definitions/blob/master/applications/NXdirecttof.nxdl.xml