Bending Tracks in Liquid Argon: The ArCS Magnetized TPC at Fermilab

Liquid Argon Time Projection Chambers (LArTPCs) provide excellent calorimetric and imaging capabilities and have become one of the key technologies for current and future neutrino experiments in the United States, such as the Short-Baseline Neutrino (SBN) Program and the Deep Underground Neutrino Experiment (DUNE). However, the lack of a magnetic field makes it hard to identify the charge sign of particles. The ArCS (Argon detector with Charge Separation) experiment, located at Fermilab's Test Beam Facility, uses a 47×40×90 cm³ LArTPC operating in a magnetic field up to 0.7 T. The goals of ArCS include determining the minimum magnetic field required for electron/positron discrimination, demonstrating the feasibility of LArTPC operation in a magnetic field, evaluating the efficiency of electron–photon separation, and assessing the capability for muon and pion momentum reconstruction. This talk will present the experiment's status, including installation progress and simulation results.