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20 April 2024 |
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Measurements and simulations of Cherenkov light in lead fluoride crystals | | P. Achenbach
; S. Baunack
; K. Grimm
; T. Hammel
; D. von Harrach
; A. Lopes Ginja
; F.E. Maas
; E. Schilling
; H. Stroeher
; | | Date: |
20 Aug 2001 | | Journal: | Nucl.Instrum.Meth. A465 (2001) 318-328 | | Subject: | nucl-ex | | Abstract: | The anticipated use of more than one thousand lead fluoride (PbF2) crystals as a fast and compact Cherenkov calorimeter material in a parity violation experiment at MAMI stimulated the investigation of the light yield (L.Y.) of these crystals. The number of photoelectrons (p.e.) per MeV deposited energy has been determined with a hybrid photomultiplier tube (HPMT). In response to radioactive sources a L.Y. between 1.7 and 1.9 p.e./MeV was measured with 4% statistical and 5% systematic error. The L.Y. optimization with appropriate wrappings and couplings was investigated by means of the HPMT. Furthermore, a fast Monte Carlo simulation based on the GEANT code was employed to calculate the characteristics of Cherenkov light in the PbF2 crystals. The computing time was reduced by a factor of 50 compared to the regular photon tracking method by implementing detection probabilities as a three-dimensional look-up table. For a single crystal a L.Y. of 2.1 p.e./MeV was calculated. The corresponding detector response to electrons between 10 and 1000 MeV was highly linear with a variation smaller than 1%. | | Source: | arXiv, nucl-ex/0108019 | | Services: | Forum | Review | PDF | Favorites | |
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