WP4_JENNIFER3

Task 4.1 Monolithic silicon trackers. Characterize the prototype sensor OBELIX-1 under various irradiation and
temperature conditions also with beam test campaigns in the KEK facility. Design and validate the next sensor,
OBELIX-2, considering OBELIX-1 test results, finalized for the construction of the next vertex detector (VTX). Finalize
the design of the VTX detection module and ladder structures. Prototype these structures with the OBELIX-1 sensor
and develop the assembly procedure. Design the mechanical and electrical services required for the VTX and develop
prototypes for each part.

Task 4.2 Photodetection devices for particle detectors. Study of silicon photomultipliers as single photon counters in
neutron irradiated areas. Test of SiPM for crystal calorimeter readout in high pile-up conditions. Characterization of
ASICs designed for photosensors readout. Studies of Digital SiPMs and Spad Arrays with integrated electronics coupled
with scintillating fibers and water-based scintillators.

Task 4.3 Innovative detectors for particle beam monitoring. Development of an optimized luminosity device and
electronics with 1% precision for SuperKEKB at design luminosity. Design and prototype a Compton polarimeter for
electron and positron beams at SuperKEKB. Test solid-state radiation detectors for the Belle II experiment. Training of
junior scientists and students at the interface between accelerator, detector, and particle physics.

Task 4.4 Future neutrino imaging detectors. Characterize the capability of fine track sampling in a range of gas mixtures
at high pressure and study the related physics potential in the context of the J-Parc neutrino beam and its infrastructure.
Develop emulsion analysis techniques in high-track density events.