Abstract
A preshower detector consisting of plastic scintillating plates with optical-fiber readout was tested at the Fermilab meson beamline. The detector was placed at a depth of about 1.5X0, followed by an electromagnetic and hadronic calorimeter, and exposed to positron, positively charged pion and positive muon beams with energies in the range of 5-227 GeV. Multianode phototubes, HAMAMATSU R5900-M16, were used for the photon readout. The efficiency for detecting two minimum ionizing particles with noise occupancy of < 1% was 90-100% for gains of (1-4) × 105. It was also found that by requiring an appropriately large signal in the preshower detector, the rate of charged pions depositing a large fraction of energy in the electromagnetic calorimeter could be reduced by a factor of 1.4-2.0 (1.4-2.8) while keeping 95% (90%) efficiency for positrons.
Original language | English (US) |
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Pages (from-to) | 104-111 |
Number of pages | 8 |
Journal | Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment |
Volume | 431 |
Issue number | 1 |
DOIs | |
State | Published - Jul 11 1999 |
Externally published | Yes |
ASJC Scopus subject areas
- Nuclear and High Energy Physics
- Instrumentation