NeXus Example Data Files

NeXus is a proposal for the definition of a common data format for neutron and X-ray scattering. This page contains links to a few example data files in NeXus format. Some are files created at SINQ, PSI at existing instruments, others contain simulated data. For maximum viewing pleasure install the free Fortner HDF browser on your PC or Macintosh and download the files for local viewing. he following files are available:

Neutron Powder Diffractometer with a PSD.

The file dmc012201998.hdf generated by the SINQ instrument DMC. Another examples is the file hrpt007101999.hdf generated by the SINQ instrument: HRPT. HRPT differs from DMC in the respect that it has a larger detector and that it has a sophisticated motorized monochromator lift assembly with two monochromators.

Neutron Small Angle Scattering

Here is the file sans0310101999.hdf from the SINQ instrument SANS. There is also an NXDICT dictionary file which is used for writing and reading the data files.

Neutron Time Of Flight Diffractometer

The file focus003101999.hdf was generated at the SINQ instrument FOCUS. For writing a NXDICT dictionary file was used.

Neutron Reflectometer

The neutron reflectometer AMOR will operate in two modes: In the first mode it performs scans with two detectors. An example file for the data written in this mode would be amortest000161999.hdf. Note that data may vary with different scan variables. The second AMOR mode is time-of-fligh with a PSD. An example file created in this mode is amortest000171999.hdf. Warning this file is biggish (will become smaller when written with the new compression scheme). In addition AMOR will support polarization and spin flipping. This is the reason why datasets have strange names such as spinuplo for spin up, lower detector. As AMOR is not yet operational all data in these files is purely fictional. The files were written using the NXDICT dictionary amor.dic.

Neutron four circle Diffractometer operated in rotation camera mode.

In ist final configuration TRICS will be operated like a rotation camera type of instrument but with three detectors. An example file written in this mode will looks like trics00151999.hdf. Note, that currently only one detector is catered for in the data file. Again the data in the file is purely fictional as TRICS is not yet operating in this mode. For writing this data the NXDICT dictionary trics.dic was used.

Your Files here?

Instrument Definitions

• AMOR
• TRICS
• SANS
• Powder Diffractometer
• POLDI
• Time-of-flight

In case of trouble with these pages contact: Mark Könnecke
Last Update: december, 06, 1999