raw_data_1/instrument/dae

This has an NX_class of IXdae; this is not a class specified by upstream NeXus definitions.

raw_data_1/instrument/dae/detector_table_file

This is a filepath to a ‘detector table’, from a location accessible by the data acquisition system. A detector table specifies metadata, for example flight path length or two theta, for each detector pixel.

For example, "C:/Instrument/Settings/config/DEMO/configurations/tables/RCPTT_detector128.dat"

NeXus consumers should treat this as metadata, and should not assume that they will be able to read the file pointed at.

raw_data_1/instrument/dae/spectra_table_file

This is a filepath to a ‘spectra table’, from a location accessible by the data acquisition system. A spectra table defines the mapping between a physical hardware pixel, and a ‘spectrum’, which may represent one or more pixels grouped together.

For example, "C:/Instrument/Settings/config/DEMO/configurations/tables/RCPTT_spectra128.dat"

NeXus consumers should treat this as metadata, and should not assume that they will be able to read the file pointed at.

raw_data_1/instrument/dae/wiring_table_file

This is a filepath to a ‘wiring table’, from a location accessible by the data acquisition system. A wiring table defines a mapping between an electronics channel/crate/card/location, to a pixel identifier.

For example, "C:/Instrument/Settings/config/DEMO/configurations/tables/RCPTT_wiring128.dat"

NeXus consumers should treat this as metadata, and should not assume that they will be able to read the file pointed at.

raw_data_1/instrument/dae/type

A string identifying the type of data acquisition hardware in use; for example:

  • "ISIS_DAE3"

  • "ISIS_DAE2"

Future acquisition systems may use different type identifiers; this list should not be treated as exhaustive.

raw_data_1/instrument/dae/period_index

This is always an array with length equal to the number of DAQ periods, and values equal to idx + 1, as an int32.

Examples:

  • For a run in software period mode with 5 periods: [1, 2, 3, 4, 5]

The raw_data_1/instrument/dae group also contains the following groups: