AUTHOR=Martinez Pablo Amedo , Deisting Alexander , Gatti Heriques Frandini , González-Díaz Diego , Lowe Adam John , Majumdar Krishanu , Mavrokoridis Konstantinos , Nessi Marzio , Philippou Barney , Pietropaolo Francesco , Ravinthiran Sudikshan , Resnati Filippo , Roberts Adam , Hernández Angela Saá , Touramanis Christos , Vann Jared 

TITLE=Design and performance of the ARIADNE+ detector, bringing novel 3D optical dual-phase LArTPCs to the large scale

JOURNAL=Frontiers in Detector Science and Technology

VOLUME=Volume 3 - 2025

YEAR=2025

URL=https://www.frontiersin.org/journals/detector-science-and-technology/articles/10.3389/fdest.2025.1593087

DOI=10.3389/fdest.2025.1593087

ISSN=2813-8031

ABSTRACT=The ARIADNE programme is focused on the development of a scalable optical readout system for use in future ktonne LAr neutrino experiments, providing high tracking capability and low energy thresholds. Following demonstration at the 1 tonne scale (ARIADNE detector), a 20 tonne experiment has been performed at the CERN Neutrino Platform (ARIADNE+) to test scalability for integration into colossal future experiments such as those planned within the DUNE programme. This paper details the design, construction and performance of a 2.3 × 2.3 m light readout plane (LRP), which contained the largest glass THGEM array ever constructed. Four Timepix3 cameras were mounted externally to image the secondary scintillation light produced within the THGEM holes; three cameras operated with a visible image intensifier, and one with a VUV sensitive intensifier coupled to a custom magnesium fluoride lens. The Timepix3 data are natively zero suppressed, and with the 1.6 ns timing resolution, straightforward 3D event reconstruction is possible. A gallery of reconstructed LAr interactions is presented. Energy resolution and calibration were determined using cosmic muons. The energy resolution was found to be approximately 11% for the presented dataset. An outlook on the next steps for this work is given.