ND280, upgraded T2K near detector

by Ellen Sandford (University of Liverpool)

Wednesday 29 Jan 2025, 14:30 → 16:00 Europe/London

VR Second Floor (Liverpool Physics)

T2K is a long baseline neutrino experiment in Japan which studies neutrino oscillation and aims to make a measurement of CP violation in the leptonic sector. A beam of muon neutrinos is created at J-PARC and travels through a suite of near detectors to measure the beam before oscillation. The neutrinos then travel 295 km to the Super-Kamiokande detector where observations are made of the muon neutrino disappearance and electron neutrino appearance.

The ND280 detector, at 280 m from the beam production, is used to characterise the neutrino beam before oscillation, measure neutrino cross-sections and develop neutrino interaction models. This is crucial for reducing the impact of systematic uncertainties for the oscillation analysis. ND280 has been running since 2009 and is expected to continue running long past the end of T2K, becoming a near detector for the next generation Hyper-Kamiokande experiment.

A recent upgrade to the ND280 detector introduced three new sub-detectors: a Super Fine Grained Detector (SFGD) made up of 3 million scintillating cubes, two high-angle TPCs (HA-TPCs), and time of flight (ToF) detectors. These sub-detectors provide many advantages including increased angular acceptance, lower momentum thresholds and neutron tagging. In this talk I will provide an overview of the T2K experiment with a focus on the ND280 upgrade including a preview of the first data collected last year, and the installation, performance and physics potential of the upgraded detector.

https://liverpool-ac-uk.zoom.us/j/96448071733?pwd=yUitlVsjikoxNTdiPD341jNbgvKaQL.1

Meeting ID: 964 4807 1733
Passcode: Fr*d6jt5