Speaker
Description
The T2K experiment is a long baseline neutrino experiment, located in
Japan. It studies neutrino oscillations by detecting accelerator
neutrinos with a complex of near detectors and a far detector. ND280,
one of the near detectors, provides a reduction of the neutrino flux and
cross section uncertainties and performs cross section measurements.
The new features of the upgraded ND280 detector allow to improve these
capabilities. In particular, the newly installed target, the Super
Fine-Grained Detector, which consists of small plastic scintillator
cubes read out by three WLS fibers in the three orthogonal directions,
offers high granularity and 3D reconstruction. This new detector design
unlocks the sensitivity to neutron detection and reconstruction by
measuring its time of flight in the detector.
In such a context, the timing characterization of this detector is
crucial. Here, a new methodology to perform time calibration for any
high granular detector is described. By exploiting the granularity of
the detector, it is possible to evaluate mis-synchronisation offsets and
time walk contributions, along with the time resolution of the detector.
The application and the results of this method are presented, allowing
the upgraded ND280 to detect neutrons from real data.
| Neutrino Properties | Neutrino oscillation |
|---|---|
| Neutrino Telescopes & Multi-messenger | n/a |
| Neutrino Theory & Cosmology | n/a |
| Data Science and Detector R&D | Calibration methods, granular detectors, scintillators and scintillating fibers |
