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McStas - A neutron ray-trace simulation package
|
| The plot shows the intensity of scattered neutrons (red is
highest intensity). The sample is at the center of the sphere with the
neutron beam coming from the left. Clearly seen is the shadowing effect
of the sample causing a lower intensity opposite the beam. Also seen is
the effect of the non-symmetric geometry of the sample, causing lower intensity
directly above and to the side of the sample. |  |
Simulated
scattering from a hollow-cylinder Recent news
Migrating from McStas 2.x to 3.x? - Use the wiki-based guides
January 7th, 2026: McStas and McXtrace 3.6.5 released
McStas and McXtrace release 3.6.5 is now available.
McStas installation instructions are found on GitHub .
What's Changed - Main Changes:
Bugfixes, new features, all common to McStas and McXtrace:
- macOS bundles in 3.6.1 did not actually install that version but something earlier. Fixed by pinning in yml file, @willend in #2285
- PDF manuals had wrong version numbers, @willend in #2285
- Allow mcrun / mcdisplay to run / visualize without access to .c/.instr by @willend in #2281
- mcgui/mxgui editable font colors, handle long filenames without extreme window resizing by @willend in #2275
- Fix cross-platform sort-order issue in PowderN by @willend in #2272
- Platform-independent reflection list sort in Single_crystal by @willend in #2273
- mcrun/mxrun: feature addition - scan by seed by @willend in #2276
- Add mcplot toggle to "plot 1D-curves from 0-value" in linear mode by @willend in #2278
- Add commentstring to vim editor by @Lomholy in #2284
Other stuff
- %Example adjustments, McXtrace by @willend in #2269
- Test_SANS/Test_SAXS, supplement stats by x10 SPLIT by @willend in #2270
- Use ${{ matrix.mpi }} to ensure different output dirs by @willend in #2271
- Fix indentation bug - issue #2279 by @willend in #2280
- Temporarily disable this instr from McXtrace tests by @willend in #2283
Full Changelog:https://github.com/mccode-dev/McCode/compare/v3.6.1...v3.6.5
Previous news items: 2025, 2024, 2023, 2022, 2021,2020,2019, 2018, 2017, 2016, 2015, 2014, 2013, 2012, 2011, 2010, 2009, 2008, 2007, 2006, 2005, 2004, 2003, 2002, 2001, 2000, 1999, 1998.
