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Patch Release 2.3.1

We would like to announce the first patch release for the 2.3 series of Allpix Squared, version 2.3.1. This release contains 28 commits over the feature release version 2.3.0. The release is available as Docker image, CVMFS installation, binary tarball and source code from the repository.

The following issues have been resolved and improvements have been made:

  • Core
    • Make the executable code compatible with Apple M1 processors MR!807.
    • Switching to boost:uniform_distributions. Since the implementation is the same as for the C++ STL we do not expect any differences in the simulation from this change, but have done it for consistency and to be future-proof against changes of the (non-guaranteed) STL implementation (for more info, here the original MR!375 when switching to Boost.Random).
  • Geant4 Interface::
    • User limits on track length and total tracking time are now correctly set on the world region instead of on the world logical volume. With this change, user limits are correctly propagated to daughter logical volumes in the same region.
    • Now G4ExceptionHandlers are registered for each of the run managers, also in multi-threaded mode. This way, all G4 exceptions are properly caught and processed by our framework. Exceptions of type JustWarning are logged on WARNING level and caught.
    • It is now possible to configure the Geant4 tracking verbosity via the geant4_tracking_verbosity parameter of the DepositionGeant4 module. The default value is 0, higher levels mean more output. It should be noted that the respective log output is redirected to the logging level set via the log_level_g4cout parameter configured in the GeometryBuilderGeant4 module.
  • Modules ProjectionPropagation, GenericPropagation, TransientPropagation:
    • Added new parameter max_charge_groups which allows to limit the number of propagation groups generated from a single deposit. By default, this feature is turned off, but when activated this can be used to limit computation time on high-energy deposition events. See MR!800.
    • Fixed an issue in the calculation of the final local time of PixelCharge objects generated by the modules. There was a double counting of the initial arrival time of the particle in the sensor.
  • Module DepositionReader: Fixed a problem with NULL-termination of char strings read from ROOT trees, see MR!774.