A beam position fiber counter with scintillation fibers and multi-pixel photon counter for high intensity beam operation

R. Honda, K. Miwa, Y. Matsumoto, N. Chiga, S. Hasegawa, K. Imai

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)

Abstract

Abstract A beam position fiber counter consisting of the scintillation fiber (Kuraray SCSF-78 M) and a multi-pixel photon counter (HPK S10362-11-100P) was developed in order to handle a 10 MHz secondary pion beam in the J-PARC E40 experiment. This counter was installed at the entrance of the beam line spectrometer at the K1.8 experimental area in J-PARC and used for the momentum reconstruction. In order to suppress the accidental background and reconstruct the beam momentum, a good timing resolution better than 0.8 ns (σ) and a good position resolution better than 200μm were simultaneously required for the counter. These requirements were well achieved by reading the 320 fibers with a diameter of 1 mm, which were arranged in a staggered position, with MPPC fiber by fiber. The signal induced from each MPPC was handled with an Extended Analogue SiPM Integrated ReadOut Chip (EASIROC) developed by Omega/IN2P3 in France. In addition, the timing of the discriminated signals from EASIROC was measured by a FPGA-based multi-hit TDC implemented into Spartan-6. Finally, we obtained the timing resolution of 0.68 ns (σ) and the position resolution of 190μm (σ) under the 9 MHz beam condition using a pion beam.

Original languageEnglish
Article number57243
Pages (from-to)157-160
Number of pages4
JournalNuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
Volume787
DOIs
Publication statusPublished - 2015 Aug 1

Keywords

  • MPPC
  • Position detector
  • Scintillation fiber

ASJC Scopus subject areas

  • Nuclear and High Energy Physics
  • Instrumentation

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