skip to main content NIST Center for Neutron Research NIST Center for Neutron Research National Institute of Standards and Technology
Home Live Data Instruments CHRNS Proposals
DAVE, Data Analysis and Visualization Environment
DAVE Home Features Changelogs Screenshots Downloads Citations DAVE/IDL documentation

Main Features

Check out the Detailed Section for specific changes in recent releases.

Also, visit the screenshots section to see DAVE in action.



Data reduction support for following NCNR/PSI instruments:
  • Triple Axis spectrometers: SPINS, BT2, BT7 and BT9
  • Filter Analyser: FANS
  • TOF chopper spectrometers: FCS, DCS
  • Back Scattering spectrometers: HFBS
  • Spin Echo spectrometers: NSE
  • FOCUS and MARS spectrometers at PSI, Switzerland
  • Can also read in ASCII data
Modules are available which provide:
  • User configurable multi-line/symbol plots
  • User configurable area (contour, image) and surface plots
  • Ability to rebin, scale, and shift individual datasets
  • Make 1D slices/cuts of 2D data
  • Merge/combine multiple 1D/2D datasets into a single 2D dataset
  • Print or generate hardcopy output in postscript and other image (jpeg/png/bmp/tiff) formats



The following data analysis tasks can be performed:
  • General-purpose least-squares fitting of 1D/2D data using 1D model functions
  • General-purpose least-squares fitting of 2D data using 2D model functions
  • A large selection of model functions (1D and 2D) are included
  • Possible to specify user-defined functions (1D only)
  • Ability to include instrumental resolution function in the model functions
  • Fitted parameters and results can be analyzed and saved as ASCII data and/or hardcopy plots
Numerous modules underneath the Planning and Tools menu:
  • Neutron cross sections table for all elements and isotopes
  • Tool for calculating neutron cross section for any arbitrary compound/molecule
  • Instrument specific tools useful for experiment planning
  • Data tools for examining raw/dave files
  • Utility to calculate neutron vibrational lineshape from a Gaussian 98 logfile
  • Spurion calculator for determining the location of spurious inelastic peaks for Triple Axis spectrometers
  • Eigenvalue and hindered rotational dynamics calculator for molecular rotors (hydrogen, methyl systems)
  • Self-shielding corrections calculator
  • Digitizer for extracting data points from a plot or image

If you reduced, analyzed or visualized your data using DAVE, please acknowledge its use by including the following reference:

[1] DAVE: A comprehensive software suite for the reduction, visualization, and analysis of low energy neutron spectroscopic data, R.T. Azuah, L.R. Kneller, Y. Qiu, P.L.W. Tregenna-Piggott, C.M. Brown, J.R.D. Copley, and R.M. Dimeo, J. Res. Natl. Inst. Stan. Technol. 114, 341 (2009).


This software was developed at the National Institute of Standards and Technology at the NIST Center for Neutron Research by employees of the Federal Government in the course of their official duties. Pursuant to title 17 section 105* of the United States Code this software is not subject to copyright protection and is in the public domain. The DAVE software package is an experimental neutron scattering data reduction, visualization, and analysis system. NIST assumes no responsibility whatsoever for its use, and makes no guarantees, expressed or implied, about its quality, reliability, or any other characteristic. The use of certain trade names or commercial products does not imply any endorsement of a particular product, nor does it imply that the named product is necessarily the best product for the stated purpose. We would appreciate acknowledgment if the software is used.

*Subject matter of copyright: United States Government works

Copyright protection under this title is not available for any work of the United States Government, but the United States Government is not precluded from receiving and holding copyrights transferred to it by assignment, bequest, or otherwise.


This work is based upon activities supported by the National Science Foundation under Agreement No. DMR-0944772 (previously DMR-0454672 for period 2005 to 2010).

The DAVE development team consists of Richard Azuah, John Copley, Rob Dimeo, Sungil Park, Seung-Hun Lee, Alan Munter, Larry Kneller, Yiming Qiu, Inma Peral, Craig Brown, Paul Kienzle and Philip Tregenna. Additional open source utilities written by David Fanning, Ronn Kling, Mark Piper, Michael D. Galloy, and Craig Markwardt have been incorporated into some of the DAVE programs as well.

Last modified 14-September-2010 by website owner: NCNR (attn: Richard Azuah)