Segmented scintillation detectors with silicon photomultiplier readout for measuring antiproton annihilations

A. Sótér, K. Todoroki, T. Kobayashi, D. Barna, D. Horváth, M. Hori

Research output: Contribution to journalArticle

10 Citations (Scopus)

Abstract

The Atomic Spectroscopy and Collisions Using Slow Antiprotons experiment at the Antiproton Decelerator (AD) facility of CERN constructed segmented scintillators to detect and track the charged pions which emerge from antiproton annihilations in a future superconducting radiofrequency Paul trap for antiprotons. A system of 541 cast and extruded scintillator bars were arranged in 11 detector modules which provided a spatial resolution of 17 mm. Green wavelength-shifting fibers were embedded in the scintillators, and read out by silicon photomultipliers which had a sensitive area of 1 × 1 mm 2. The photoelectron yields of various scintillator configurations were measured using a negative pion beam of momentum p ≈ 1 GeV/c. Various fibers and silicon photomultipliers, fiber end terminations, and couplings between the fibers and scintillators were compared. The detectors were also tested using the antiproton beam of the AD. Nonlinear effects due to the saturation of the silicon photomultiplier were seen at high annihilation rates of the antiprotons.

Original languageEnglish
Article number023302
JournalReview of Scientific Instruments
Volume85
Issue number2
DOIs
Publication statusPublished - Feb 2014

Fingerprint

Scintillation counters
Photomultipliers
antiprotons
Phosphors
scintillation
readout
scintillation counters
Silicon
detectors
silicon
Fibers
brakes (for arresting motion)
fibers
Detectors
Atomic spectroscopy
Photoelectrons
pion beams
Momentum
Wavelength
casts

ASJC Scopus subject areas

  • Instrumentation

Cite this

Segmented scintillation detectors with silicon photomultiplier readout for measuring antiproton annihilations. / Sótér, A.; Todoroki, K.; Kobayashi, T.; Barna, D.; Horváth, D.; Hori, M.

In: Review of Scientific Instruments, Vol. 85, No. 2, 023302, 02.2014.

Research output: Contribution to journalArticle

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