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Inconsistent summed charge distributions in MCC11 MARLEY (clean) sample; SAM definition mcc11_snb_monoenergetic_marley_clean. The low-energy portion of the simulations (approximately 4-20 MeV) produce charge distributions with negative charge and "double bumps". The higher-energy simulations (20-100 MeV) contain negligible effects, or the effects are completely absent. Further exploration showed inconsistencies in the average summed charge between files of the same simulation, i.e., files with the same configuration parameters produce different summed charge distributions; more information is available in the #low-energy-reco Slack channel or see the attached PDFs.

The summed charge was found using RawDigit objects on the collection plane; code on feature branch "feature/econley_ChargeDist". MARLEY/G4 parameters of interest have been shown to be consistent and comparable between MCC11 MARLEY files with the same configuration parameters; some RawDigit/detsim parameters of interest show differences between the files. This indicates that there might be a detsim issue, perhaps a randomly generated parameter that would affect simulations on the ~MeV scale more significantly than the ~10s of MeV.