Version 0.1.5
Version 0.1.5
Version 0.1.5 corrects several major tracking and physics bugs
in the 0.1.x series. Notably:
- Positron annihilation is no longer ignored.
- The 1 keV standard EM physics cutoff applies to electrons and positrons after slowing down in addition to before, reducing the number of low-energy particles being tracked.
- Field propagation no longer advances particles to boundaries slightly past their physics path length. This previously produced numerous instances of a coincident boundary crossing plus physics interaction.
- In high-Z materials, Geant4 produces MSC cross sections for positrons that are not monotonically decreasing with increasing energy (there is a discontinuity around 10 MeV). This behavior previously caused a miscalculation of the step length when slowing down near 10 MeV.
Bug fixes
- Fix build documentation and issues with newer toolchains (@sethrj, #571)
- Fix missing positron annihilation process and process diagnostic (@amandalund, #625)
- Fix NaN/assertion when taking extremely small steps in a field (@sethrj, #628)
- Fix ORANGE intersection along cylinder axis (@sethrj, #627)
- Fix incorrect Urban MSC path length correction due to discontinuity in positron cross section (@amandalund, #642)
- Check for unlikely "zero speed" condition (@sethrj, #646)
- Avoid XS scaling factor > 1 in
SBPositronXSCorrector(@stognini, #649) - Fix coincident boundary/step created by field propagator (@sethrj, #654)
- VecGeom/Cuda: set the stack limit to 16K when CELERITAS_DEBUG=ON (@pcanal, #638)
- Apply electron tracking cut after slowing down in addition to before (@sethrj, #648)
Reviewers: @sethrj (4), @whokion (4), @amandalund (2), @paulromano (1), @elliottbiondo (1)
Documentation improvements
Reviewers: @whokion (1)
Minor internal changes
- CI: use Geant4 11, C++17, VecGeom 1.2, CUDA 11.8, GCC 11 (@sethrj, #566)
- CI: add no-debug HIP (ROCM 5.4) build (@sethrj, #569)
Reviewers: @pcanal (1)
Full Changelog: v0.1.4...v0.1.5
Contributors
sethrj, paulromano, and 5 other contributors