TY - JOUR
T1 - Studies of an array of PbF2 Cherenkov crystals with large-area SiPM readout
AU - Fienberg, A. T.
AU - Alonzi, L. P.
AU - Anastasi, A.
AU - Bjorkquist, R.
AU - Cauz, D.
AU - Fatemi, R.
AU - Ferrari, C.
AU - Fioretti, A.
AU - Fankenthal, A.
AU - Gabbanini, C.
AU - Gibbons, L. K.
AU - Giovanetti, K.
AU - Goadhouse, S. D.
AU - Gohn, W. P.
AU - Gorringe, T. P.
AU - Hertzog, D. W.
AU - Iacovacci, M.
AU - Kammel, P.
AU - Kaspar, J.
AU - Kiburg, B.
AU - Li, L.
AU - Mastroianni, S.
AU - Pauletta, G.
AU - Peterson, D. A.
AU - Počanić, D.
AU - Smith, M. W.
AU - Sweigart, D. A.
AU - Tishchenko, V.
AU - Venanzoni, G.
AU - Van Wechel, T. D.
AU - Wall, K. B.
AU - Winter, P.
AU - Yai, K.
N1 - Publisher Copyright:
© 2015 Elsevier B.V. All rights reserved.
PY - 2015/5/21
Y1 - 2015/5/21
N2 - The electromagnetic calorimeter for the new muon (g-2) experiment at Fermilab will consist of arrays of PbF2 Cherenkov crystals read out by large-area silicon photo-multiplier (SiPM) sensors. We report here on measurements and simulations using 2.0-4.5 GeV electrons with a 28-element prototype array. All data were obtained using fast waveform digitizers to accurately capture signal pulse shapes vs. energy, impact position, angle, and crystal wrapping. The SiPMs were gain matched using a laser-based calibration system, which also provided a stabilization procedure that allowed gain correction to a level of 10-4 per hour. After accounting for longitudinal fluctuation losses, those crystals wrapped in a white, diffusive wrapping exhibited an energy resolution σ/E of (3.4±0.1)%/E/GeV, while those wrapped in a black, absorptive wrapping had (4.6±0.3)%/E/GeV. The white-wrapped crystals - having nearly twice the total light collection - display a generally wider and impact-position-dependent pulse shape owing to the dynamics of the light propagation, in comparison to the black-wrapped crystals, which have a narrower pulse shape that is insensitive to impact position.
AB - The electromagnetic calorimeter for the new muon (g-2) experiment at Fermilab will consist of arrays of PbF2 Cherenkov crystals read out by large-area silicon photo-multiplier (SiPM) sensors. We report here on measurements and simulations using 2.0-4.5 GeV electrons with a 28-element prototype array. All data were obtained using fast waveform digitizers to accurately capture signal pulse shapes vs. energy, impact position, angle, and crystal wrapping. The SiPMs were gain matched using a laser-based calibration system, which also provided a stabilization procedure that allowed gain correction to a level of 10-4 per hour. After accounting for longitudinal fluctuation losses, those crystals wrapped in a white, diffusive wrapping exhibited an energy resolution σ/E of (3.4±0.1)%/E/GeV, while those wrapped in a black, absorptive wrapping had (4.6±0.3)%/E/GeV. The white-wrapped crystals - having nearly twice the total light collection - display a generally wider and impact-position-dependent pulse shape owing to the dynamics of the light propagation, in comparison to the black-wrapped crystals, which have a narrower pulse shape that is insensitive to impact position.
KW - Electromagnetic calorimeter
KW - Lead-fluoride crystals
KW - Silicon photomultiplier
UR - http://www.scopus.com/inward/record.url?scp=84924033115&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84924033115&partnerID=8YFLogxK
U2 - 10.1016/j.nima.2015.02.028
DO - 10.1016/j.nima.2015.02.028
M3 - Article
AN - SCOPUS:84924033115
SN - 0168-9002
VL - 783
SP - 12
EP - 21
JO - Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
JF - Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
ER -