Measurement of time resolution of the Mu2e LYSO calorimeter prototype

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• 作者：N. Atanov^a ; V. Baranov^a ; F. Colao^b ; M. Cordelli^b ; G. Corradi^b ; E. Dané ; ^b ; Yu.I. Davydov^a ; K. Flood^c ; S. Giovannella^b ; V. Glagolev^a ; F. Happacher^b ; D.G. Hitlin^c ; M. Martini^b ; ^d ; S. Miscetti^b ; ^{stefano.miscetti@lnf.infn.it" class="auth_mail" title="E-mail the corresponding author} ; T. Miyashita^c ; L. Morescalchi^e ; ^f ; G. Pezzullo^e ; ^g ; A. Saputi^b ; I. Sarra^b ; S.R. Soleti^b ; ^{soleti@lnf.infn.it" class="auth_mail" title="E-mail the corresponding author} ; G. Tassielli^h ; ⁱ ; V. Tereshchenko^a
• 关键词：Calorimetry ; Timing ; APD ; LYSO crystals ; Mu2e experiment
• 刊名：Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
• 出版年：2016
• 出版时间：11 March 2016
• 年：2016
• 卷：812
• 期：Complete
• 页码：104-111
• 全文大小：1498 K

文摘

In this paper we present the time resolution measurements of the Lutetium–Yttrium Oxyorthosilicate (LYSO) calorimeter prototype for the Mu2e experiment. The measurements have been performed using the 6356&_mathId=si0001.gif&_user=111111111&_pii=S0168900215016356&_rdoc=1&_issn=01689002&md5=bd65a1e8df6b5d1bc730e3fe7791be7e" title="Click to view the MathML source">e⁻${\mathrm{e}}^{-}$ beam of the Beam Test Facility (BTF) in Frascati, Italy in the energy range from 100 to 400 MeV. The calorimeter prototype consisted of twenty five 6356&_mathId=si0006.gif&_user=111111111&_pii=S0168900215016356&_rdoc=1&_issn=01689002&md5=b0a0a8f64fc625714c7a419f2e2d3445">6356-si0006.gif">$30\times 30\times 130{\mathrm{mm}}^3$, LYSO crystals read out by 6356&_mathId=si0007.gif&_user=111111111&_pii=S0168900215016356&_rdoc=1&_issn=01689002&md5=8108000346d2ef481bcaaff22cb5b96e">6356-si0007.gif">$10\times 10{\mathrm{mm}}^2$ Hamamatsu Avalanche Photodiodes (APDs). The energy dependence of the measured time resolution can be parametrized as 6356&_mathId=si0008.gif&_user=111111111&_pii=S0168900215016356&_rdoc=1&_issn=01689002&md5=15a530e86884ca70a6c8f2e585ce8403">6356-si0008.gif">${\sigma }_t\left(E\right)=a/\sqrt{E/\mathrm{GeV}}\oplus b$, with the stochastic and constant terms 6356&_mathId=si0009.gif&_user=111111111&_pii=S0168900215016356&_rdoc=1&_issn=01689002&md5=da405fd49539967c9c5451da835347a4">6356-si0009.gif">$a=(51\pm 1)\mathrm{ps}$ and 6356&_mathId=si0010.gif&_user=111111111&_pii=S0168900215016356&_rdoc=1&_issn=01689002&md5=6b612a9add11c2e3f2b02089ef196413">6356-si0010.gif">$b=(10\pm 4)\mathrm{ps}$, respectively. This corresponds to the time resolution of 6356&_mathId=si0011.gif&_user=111111111&_pii=S0168900215016356&_rdoc=1&_issn=01689002&md5=2a97c2f0342c3580d79b8ba8a17d1b66">6356-si0011.gif">$(162\pm 4)\mathrm{ps}$ at 100 MeV.