A detector for charged particle identification in the forward region of SuperB
type: Dataset
description: In this thesis, we present the conception, the performances studies and the first tests in the Cosmic Muon Telescope situated at SLAC of a new detector for the particle identification in the forward region of the SuperB detector.This detector is based on time-of-flight (TOF) technique. To identify the particles with momentum up to 3 GeV/c and flight base around two meters we need a TOF detector able to measure the time with a precision of about 30 ps. To achieve this goal we have conceived a device producing Cherenkov light in a fused silica (quartz) radiator, by a charged particle, which then detected with very fast photodetectors and dedicated ultrafast electronics. We call it, the DIRC-like TOF detector.For what concern the photodetectors, the HAMAMATSU SL-10 MCP-PMT has been characterized at LAL test bunch and the time resolution of about 37 ps has been measured. The new 16-channel USB WaveCatcher electronics developed by LAL (CNRS/IN2P3) and CEA/IRFU has shown to have a jitter of less than 10 ps. The geometry of the quartz detector has been then carefully studied with Geant4 simulation. Which shows that the best detector geometry allow to reach the time resolution of about 90 ps per photoelectron with at least 10 photoelectrons detected, giving in average the desired 30 ps total time resolution.We have constructed a prototype of such device, using the quartz bars available from the Babar experiment, and we have installed it, in the SLAC Cosmic Ray Telescope. A time resolution of about 70 ps per photoelectron was obtained, in agreement with simulation.This proof-of-principle has convinced the SuperB Collaboration to adopt such a device as the baseline for the SuperB particle identification detector in the forward region. The delicate point which is still opened is the resistance of this detector to the machine background.In this thesis we also present preliminary studies of different types of background and their effect on the performances of the DIRC-like TOF d…
identifier: NNT: 2011PA112331
issued: 2026-05-27T06:19:15.847218
language: en
modified: 2026-05-27T06:19:15.847232
contact point: Organization
  fn: CCSD
keyword: b-physics
keyword: cherenkov-detectors
keyword: dirc
keyword: dirc-like-tof
keyword: erenkov-detecteurs-de
keyword: fast-photon-detectors
keyword: geant4-simulation
keyword: identification-des-particules
keyword: infoeu-reposemanticsdoctoralthesis
keyword: luminosity-backgrounds
keyword: particle-identification
keyword: physcondcm-genphysics-physicscondensed-matter-cond-matother-cond-matother
keyword: pid
keyword: radiative-bhabha
keyword: theses
keyword: tome-of-flight
keyword: top
keyword: torch
keyword: usb-wavecatcher
keyword: wave-digitizing-electronics
landing page: https://theses.hal.science/tel-00673482

A detector for charged particle identification in the forward region of SuperB
type: Distribution
format: HTML
issued: 2026-05-27T06:19:15.960374
modified: 2026-05-27T06:19:15.767178
access URL: https://theses.hal.science/tel-00673482

test_moissonnage_selune
type: Agent