Signal Processing in the ProtoDUNE-SP LArTPC

ProtoDUNE-SP is the single-phase prototype for the DUNE Far Detector. Consisting of an active volume of 6m high, 7m wide and 7.2m deep (along the drift direction), ProtoDUNE-SP with a total liquid argon mass of 0.77kt represents the world largest monolithic single-phase liquid argon time projection chamber (LArTPC) ever built to date. It was constructed at the CERN Neutrino Platform (NP) and started the operation in late 2018, serving to validate the cryostat technology, the modular TPC design, the cold read-out electronics and the other infrastructures. Given the wire readout technology employed in ProtoDUNE-SP, the combination of the induction and collection wire plane information helps resolve the degeneracies inherent in a projective wire geometry. In this talk, in addition to the detector performance, we present the signal processing techniques through which the ionization signal is precisely recovered in charge and time from the digitized waveforms, which comprise the original ionization signal convolved with the detector field response and electronics response as well as noise. The correct modeling of these ingredients is critical for further event reconstruction.