Characterization of resistive Micromegas detectors for the upgrade of the T2K Near Detector Time Projection Chambers

Abstract

The second phase of the T2K experiment is expected to start data taking in autumn 2022. An upgrade of the Near Detector (ND280) is under development and includes the construction of two new Time Projection Chambers called High-Angle TPC (HA-TPC). The two endplates of these TPCs will be paved with eight Micromegas type charge readout modules. The Micromegas detector charge amplification structure uses a resistive anode to spread the charges over several pads to improve the space point resolution. This innovative technique is combined with the bulk-Micromegas technology to compose the "Encapsulated Resistive Anode Micromegas" detector. A prototype has been designed, built and exposed to an electron beam at the DESY II test beam facility. The data have been used to characterize the charge spreading and to produce a RC map. Spatial resolution better than 600 $\mu$m and energy resolution better than 9% are obtained for all incident angles. These performances fulfil the requirements for the upgrade of the ND280 TPC.

32 pages, 22 figures

References in corpus (5)

• Indication of Electron Neutrino Appearance from an Accelerator-produced Off-axis Muon Neutrino Beam
• The SuperFGD Prototype Charged Particle Beam Tests
• Measurement of the intrinsic electron neutrino component in the T2K neutrino beam with the ND280 detector
• Maximum value of the spin-independent cross section in the THDM+a
• Spatial resolution of a GEM readout TPC using the charge dispersion signal

Cited by in corpus (4)

• Measurements of neutrino oscillation parameters from the T2K experiment using $3.6\times 10^{21}$ protons on target
• Sensitivity of the Upgraded T2K Near Detector to constrain neutrino and anti-neutrino interactions with no mesons in the final state by exploiting nucleon-lepton correlations
• Analysis of test beam data taken with a prototype of TPC with resistive Micromegas for the T2K Near Detector upgrade
• Time Projection Chamber for GADGET II