Speaker
Description
As a part of the upgrade of ND280, the off-axis detector of the T2K experiment, two new gaseous Time Projection Chambers (TPCs) have been installed above and below the highly segmented active target (SFGD) to enhance the tracking of particles emitted at a large angle with respect to the beam direction. The TPCs feature innovative, lightweight field cages constructed from low-density, low-Z materials and are equipped with 32 Encapsulated Resistive-Anode Micromegas (ERAMs), extensively characterized before the installation. The upgrade was completed in fall 2023 and, since then, commissioning with cosmics and neutrino beam confirmed stable operational performance.
This talk provides a comprehensive overview of the TPC design, focusing on the technological solutions developed to address the challenges of the field cage and readout integration. We will present performance results from the extensive commissioning phase, including a detailed comparison between experimental data and Monte Carlo simulations. Finally, the discussion will cover the upcoming measurement campaigns using both laser and particle beams, which are dedicated to the precise characterization of energy loss and the mapping of electric field uniformity within the detector volume.
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