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

Author:

Elizabeth Tilly, Magnus Handley, MIGDAL Collaboration

Keyword:

High Energy Physics - Experiment, High Energy Physics - Experiment (hep-ex), Data Analysis, Statistics and Probability (physics.data-an), Instrumentation and Detectors (physics.ins-det)

journal:

JINST 18 C07013 (2023)

date:

2023-07-18 16:00:00

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.

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