Correlation of Beam Electron and LED Signal Losses under Irradiation and Long-term Recovery of Lead Tungstate Crystals

Abstract

Radiation damage in lead tungstate crystals reduces their transparency. The calibration that relates the amount of light detected in such crystals to incident energy of photons or electrons is of paramount importance to maintaining the energy resolution the detection system. We report on tests of lead tungstate crystals, read out by photomultiplier tubes, exposed to irradiation by monoenergetic electron or pion beams. The beam electrons themselves were used to measure the scintillation light output, and a blue light emitting diode (LED) was used to track variations of crystals transparency. We report on the correlation of the LED measurement with radiation damage by the beams and also show that it can accurately monitor the crystals recovery from such damage.

arXiv comment9 pages, 6 figures, LaTeX2e

References in corpus (6)

• Precision Measurement of Energy and Position Resolutions of the BTeV Electromagnetic Calorimeter Prototype
• Study of Radiation Damage in Lead Tungstate Crystals Using Intense High Energy Beams
• Development of a Momentum Determined Electron Beam in the 1 -45 GeV Range
• Comparison of Radiation Damage in Lead Tungstate Crystals under Pion and Gamma Irradiation
• LED Monitoring System for the BTeV Lead Tungstate Crystal Calorimeter Prototype
• Study of Possible Scintillation Mechanism Damage in PbWO4 Crystals After Pion Irradiation

Cited by in corpus (4)

• First study of radiation hardness of lead tungstate crystals at low temperatures
• Comparison between high-energy proton and charged pion induced damage in Lead Tungstate calorimeter crystals
• The HPS electromagnetic calorimeter
• Design and performance of LED calibration system prototype for the lead tungstate crystal calorimeter