Author:
Martynenko S.,Pietropaolo F.,Viren B.,Qian X.,Chen H.,Gao S.,Gu W.,Jo J.,Kettell S.,Li Y.,Liu H.,Nayak N.,Yu B.,Yu H.,Zhang C.,Kose U.,Resnati F.,Tufanli S.,Boran F.,Dolek F.
Abstract
Abstract
Liquid Argon Time Projection Chamber (LArTPC) technology is commonly utilized in neutrino
detector designs. It enables detailed reconstruction of neutrino events with high spatial
precision and low energy threshold. Its field response (FR) model describes the time-dependent
electric currents induced in the anode-plane electrodes when ionization electrons drift nearby. An
accurate and precise FR is a crucial input to LArTPC detector simulations and charge
reconstruction. Established LArTPC designs have been based on parallel wire planes. It allows
accurate and computationally economic two-dimensional (2D) FR models utilizing the translational
symmetry along the direction of the wires. Recently, novel LArTPC designs utilize electrodes
formed on printed circuit board (PCB) in the shape of strips with through holes. The translational
symmetry is no longer a good approximation near the electrodes and a new FR calculation that
employs regions with three dimensions (3D) has been developed. Extending the 2D models to 3D would
be computationally expensive. Fortuitously, the nature of strips with through holes allows for a
computationally economic approach based on the finite-difference method (FDM). In this paper, we
present a new software package pochoir that calculates LArTPC field response for these new
strip-based anode designs. This package combines 3D calculations in the volume near the electrodes
with 2D far-field solutions to achieve fast and precise field response computation. We apply the
resulting FR to simulate and reconstruct samples of cosmic-ray muons and 39Ar decays from a
Vertical Drift (VD) detector prototype operated at CERN. We find the difference between real and
simulated data within 5%. Current state-of-the-art LArTPC software requires a 2D FR which we
provide by averaging over one dimension and estimate that variations lost in this average are
smaller than 7%.
Subject
Mathematical Physics,Instrumentation
Reference24 articles.
1. The DUNE Far Detector Interim Design Report Volume 1: Physics, Technology and Strategies;Abi,2018
2. A Proposal for a Three Detector Short-Baseline Neutrino Oscillation Program in the Fermilab Booster Neutrino Beam;Acciarri,2015
3. Design and Construction of the MicroBooNE Detector;Acciarri;JINST,2017
4. LArIAT: Liquid Argon In A Testbeam;Cavanna,2014