Three-dimensional Imaging for Large LArTPCs

TL;DR

This paper introduces Wire-Cell, a novel 3D imaging method for large liquid argon TPCs that enhances event reconstruction by utilizing charge, sparsity, time, and geometry information for accurate 3D ionization density imaging.

Contribution

The paper presents a new 3D imaging technique, Wire-Cell, that improves event reconstruction in LArTPCs by integrating multiple data types with simple mathematical methods.

Findings

Provides high-quality 3D ionization density images

Enables better 3D tracking and calorimetry in LArTPCs

Improves unambiguous event reconstruction

Abstract

High-performance event reconstruction is critical for current and future massive liquid argon time projection chambers (LArTPCs) to realize their full scientific potential. LArTPCs with readout using wire planes provide a limited number of 2D projections. In general, without a pixel-type readout it is challenging to achieve unambiguous 3D event reconstruction. As a remedy, we present a novel 3D imaging method, Wire-Cell, which incorporates the charge and sparsity information in addition to the time and geometry through simple and robust mathematics. The resulting 3D image of ionization density provides an excellent starting point for further reconstruction and enables the true power of 3D tracking calorimetry in LArTPCs.