en
Scientific article
English

A 4π time-of-flight detector for the ND280/T2K upgrade

Published inJournal of instrumentation, vol. 17, no. 01, P01016
Publication date2022-01-12
First online date2022-01-12
Abstract

ND280 is a near detector of the T2K experiment which is located in the J-PARC accelerator complex in Japan. After a decade of fruitful data-taking, ND280 is scheduled for upgrade. The time-of-flight (ToF) detector, which is described in this article, is one of three new detectors that will be installed in the basket of ND280. The ToF detector has a modular structure. Each module represents an array of 20 plastic scintillator bars which are stacked in a plane of 2.4 × 2.2 m$^{2}$ area. Six modules of similar construction will be assembled in a cube, thus providing an almost 4π enclosure for an active neutrino target and two TPCs. The light emitted by scintillator is absorbed by arrays of large-area silicon photo-multipliers (SiPMs) which are attached to both ends of every bar. The readout of SiPMs, shaping and analog sum of individual SiPM signals within the array are performed by a discrete circuit amplifier. An average time resolution of about 0.14 ns is achieved for a single bar when measured with cosmic muons. The detector will be installed in the basket of ND280, where it will be used to veto particle originating outside the neutrino target, improve the particle identification and provide a cosmic trigger for calibration of detectors which are enclosed inside it.

eng
Keywords
  • Detector design and construction technologies and materials
  • Instrumentation and methods for time-of-flight (TOF) spectroscopy
  • Scintillators and scintillating fibres and light guides
  • Photon detectors for UV, visible and IR photons (solid-state)
  • Activity report
  • Photomultiplier: silicon
  • Upgrade
  • KAMIOKANDE
  • Scintillation counter: plastics
  • Time-of-flight counter
  • Muon: cosmic radiation
  • Time resolution
  • Time projection chamber
  • Near detector
  • Four-pi-detector
Citation (ISO format)
KORZENEV, Alexander et al. A 4π time-of-flight detector for the ND280/T2K upgrade. In: Journal of instrumentation, 2022, vol. 17, n° 01, p. P01016. doi: 10.1088/1748-0221/17/01/p01016
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Article (Submitted version)
accessLevelPublic
Identifiers
ISSN of the journal1748-0221
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Technical informations

Creation10/06/2022 10:17:00 AM
First validation10/06/2022 10:17:00 AM
Update time03/16/2023 7:56:27 AM
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