Electron-hadron shower discrimination in a liquid argon time projection chamber

By exploiting structural differences between electromagnetic and hadronic showers in a multivariate analysis we present an efficient Electron-Hadron discrimination algorithm for liquid argon time projection chambers, validated using Geant4 simulated data

Point-source reconstruction with a sparse light-sensor array for optical TPC readout

A reconstruction technique for sparse array optical signal readout is introduced and applied to the generic challenge of large-area readout of a large number of point light sources. This challenge finds a prominent example in future, large volume neutrino detector studies based on liquid argon. It is concluded that the sparse array option may be ruled out for reasons of required number of channels when compared to a benchmark derived from charge readout on wire-planes. Smaller-scale detectors, however, could benefit from this technology

Modelling electroluminescence in liquid argon

We present Monte-Carlo simulations of electron transport through liquid argon motivated by our recent observation of electroluminescence light emanating from a thick gaseous electron multiplier (THGEM) in a liquid argon volume. All known elastic and inelastic reaction cross-sections have been accounted for, providing electroluminescence light yield predictions for arbitrary electrostatic fields. This study concludes that the large field gradients needed to produce electroluminescence cannot be accounted for by straightforward electrostatic field calculations based on ideal THGEM holes, suggesting that further experimental investigations are required

Reconstruction & modelling challenges for large volume liquid argon detectors

Reconstruction of events in fine-grained tracking detectors has never been fully automated. We present preliminary findings concerning hit clustering, tracking and the tagging of interest points, such as interaction vertices

Optical readout technology for large volume liquid argon detectors

A recent experimental investigation successfully demonstrated the proof of principle stage of a new technique for operating Liquid Argon Time-Projection Chambers. We present an overview of this technique, and plans for follow-up experimental work

Implementation of a cellular automaton algorithm for neutrino interaction reconstruction in a liquid argon volume

A Cellular Automaton algorithm has been implemented in three dimensions for automated track reconstruction of neutrino interactions in a Liquid Argon Time Projection Chamber. We present details of the algorithm and characterise its performance on simulated data set