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

TL;DR

This paper demonstrates 3D reconstruction of low-energy electron tracks in a low-pressure optical TPC using advanced algorithms to integrate camera images and waveform data, enabling detailed event topology analysis.

Contribution

It introduces novel algorithms for event identification and 3D track reconstruction in a low-pressure optical TPC with ITO strip readout.

Findings

Successful 3D reconstruction of various electron track topologies

Effective integration of camera images and waveform data

Demonstration of track ridge detection methods

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.