First Demonstration of Imaging Cosmic Muons in a Two-Phase Liquid Argon TPC using an EMCCD Camera and a THGEM

Abstract

Colossal two-phase Liquid Argon Time Projection Chambers (LAr TPCs) are a proposed option for future long-baseline neutrino experiments. This study illustrates the feasibility of using an EMCCD camera to capture light induced by single cosmic events in a two-phase LAr TPC employing a THGEM. An Andor iXon Ultra 897 EMCCD camera was externally mounted via a borosilicate glass viewport on the Liverpool two-phase LAr TPC. The camera successfully captured the secondary scintillation light produced at the THGEM holes that had been induced by cosmic events. The light collection capability of the camera for various EMCCD gains was assessed. For a THGEM gain of 64 and an EMCCD gain of 1000, clear images were captured with an average signal-to-noise ratio of 6. Preliminary 3D reconstruction of straight cosmic muon tracks has been performed by combining the camera images, PMT signals and THGEM charge data. Reconstructed cosmic muon tracks were used to determine THGEM gain and to calibrate the intensity levels of the EMCCD image.

References in corpus (6)

• Underground Neutrino Detectors for Particle and Astroparticle Science: the Giant Liquid Argon Charge Imaging ExpeRiment (GLACIER)
• Optical readout tracking detector concept using secondary scintillation from liquid argon generated by a thick gas electron multiplier
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• Direct observation of avalanche scintillations in a THGEM-based two-phase Ar avalanche detector using Geiger-mode APD
• Optical Readout of a Two Phase Liquid Argon TPC using CCD Camera and THGEMs
• First operation and drift field performance of a large area double phase LAr Electron Multiplier Time Projection Chamber with an immersed Greinacher high-voltage multiplier

Cited by in corpus (7)

• Imaging and time stamping of photons with nanosecond resolution in Timepix based optical cameras
• Review of Liquid Argon Detector Technologies in the Neutrino Sector
• First demonstration of 3D optical readout of a TPC using a single photon sensitive Timepix3 based camera
• The Thick Gas Electron Multiplier and its derivatives: physics, technologies and applications
• ARIADNE -- A Novel Optical LArTPC: Technical Design Report and Initial Characterisation using a Secondary Beam from the CERN PS and Cosmic Muons
• First Demonstration of the Use of LG-SiPMs for Optical Readout of a TPC
• A Novel Manufacturing Process for Glass THGEMs and First Characterisation in an Optical Gaseous Argon TPC