Project Summary
McStas and McXtrace are ongoing projects to create a general tool for simulating neutron (McStas) and X-ray (McXtrace) scattering instruments. The two code variants are distributed independently, but share as much infrastructure and tools as possible. Together they are known under the name of McCode.
Both McStas and McXtrace are based on a code-generation mechanism where a high-level specification language defines the instrument to be simulated and the mcstas/mcxtrace code generator produces C code that performs the Monte Carlo Simulation.
McStas and McXtrace both come with comprehensive manuals and a libraries of well-tested components that include most standard elements of neutron- and X-ray- scattering instruments respectively.
In a Nutshell, McCode...
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has a well established, mature codebase
maintained by a large development team
with decreasing Y-O-Y commits -
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took an estimated 240 years of effort (COCOMO model)
starting with its first commit in June, 1997
ending with its most recent commit 5 days ago
GNU General Public License v2.0
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Commercial Use
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These details are provided for information only. No information here is legal advice and should not be used as such.
Project Security
Vulnerabilities per Version ( last 10 releases )
There are no reported vulnerabilities
Project Vulnerability Report
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Vulnerability Exposure Index
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30 Day SummaryJan 16 2026 — Feb 15 2026
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12 Month SummaryFeb 15 2025 — Feb 15 2026
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