A Prototype High Pressure Gas Time Projection Chamber for Future Long Baseline Neutrino Experiments

Currently, a High Pressure gas Time Projection Chamber (HPTPC) is included in the baseline design for the near detector in the Deep Underground Neutrino Experiment DUNE and is a candidate for Hyper-Kamiokande long baseline neutrino experiments. Increased pressure results in a likewise increased probability for (neutrino) gas interactions, but retains a low momentum detection threshold for final state particles, compared to liquid or solid detectors. A Prototype HPTPC rated to 5 bar of pressure was built, using a novel readout based on the detection of scintillation light from gas amplification. A beam test was performed at the CERN East Area T10 beamline from August to September 2018 making measurements of proton and pion interactions in the HPTPC together with an upstream and downstream time of flight system. First results of the analysis of the test beam data are presented.