Speaker
Description
The T2K experiment has recently completed the upgrade of its off-axis near detector ND280. Two new gaseous High-Angle Time Projection Chambers (HA-TPCs) have been installed above and below the highly segmented scintillator active target SuperFGD to precisely track particles emitted at large angles with respect to the beam direction. The upgraded setup also includes six new time-of-flight scintillator panels for accurate timing information. Each HA-TPC incorporates an innovative lightweight field cage, made of low-density, low-Z materials, with a total wall thickness of less than 4% of radiation length. The two chambers are read out by a total of 32 ERAM detectors, a novel type of resistive Micromegas, extensively characterized prior to integration. This contribution will present the latest performance results of the HA-TPCs and discuss ongoing developments. To provide deeper insight into electric field non-uniformities and further enhance our understanding of ERAM detector performance, a 266 nm laser system for a half-volume TPC is currently under commissioning at CERN, and a test beam campaign at the CERN PS beam line is planned before the upcoming long shutdown.