Original scientific paper

Radiation hardness of the PIBETA detector components

E. Frlež ; Department of Physics, University of Virginia, Charlottesville, VA 22904-4714, USA
T. A. Campbell ; Department of Physics, University of Virginia, Charlottesville, VA 22904-4714, USA
I. J. Carey ; Department of Physics, University of Virginia, Charlottesville, VA 22904-4714, USA
D. Počanić ; Department of Physics, University of Virginia, Charlottesville, VA 22904-4714, USA

Abstract

We have examined long-term changes in signal amplitude gain, energy resolution and detection efficiency of the active components of the PIBETA detector system. Beam-defining plastic scintillation counters were operated in a ∼ 1 MHz stopped π + beam for a period of 297 days, accumulating radiation doses of up to 2 · 106 rad. Detectors in the charged particle tracking system — a pair of cylindrical multi-wire proportional chambers and a thin plastic scintillation barrel-shaped hodoscope array — were irradiated during the same running period with an average dose of ∼ 4 · 104 rad. Individual CsI (undoped crystal) calorimeter detectors received an average dose of ∼ 120 rad, mainly from photons, positrons and protons originating from π + hadronic interactions as well as from π + and µ + weak decays at rest in the active target.

Keywords

long-term temporal stability of detector gain; energy resolution and detection efficiency; radiation hardness; radiation resistance; radiation damage

Hrčak ID:

305216

URI

https://hrcak.srce.hr/305216

Publication date:

4.5.2003.

Article data in other languages: croatian

Visits: 484 *