3D track reconstruction of low-energy electrons in the MIGDAL low pressure optical time projection chamber

Abstract

We demonstrate three-dimensional track reconstruction of electrons in a low pressure (50 Torr) optical TPC consisting of two glass GEMs with an ITO strip readout in CF4 and CF4/Ar mixtures. The reconstructed tracks show a variety of event topologies, including short tracks from photoelectrons induced by 55Fe 5.9 keV X-rays and long tracks from gamma ray interactions and beta decays. Algorithms for event identification and track ridge detection are discussed as well as multiple methods for integrating information from the camera image and ITO waveforms with the goal of full 3D reconstruction of the track.

MPGD 2022 Conference Proceedings

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• SENSEI: Direct-Detection Results on sub-GeV Dark Matter from a New Skipper-CCD
• Searching for low-mass dark matter particles with a massive Ge bolometer operated above-ground
• Precise predictions and new insights for atomic ionisation from the Migdal effect
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Cited by in corpus (2)

• Transforming a rare event search into a not-so-rare event search in real-time with deep learning-based object detection
• Comparison of the Migdal transition probabilities in electron-atom inelastic cross sections