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LSO/LYSO Crystals for Calorimeters in Future HEP Experiments

Zhang, Liyuan and Mao, Rihua and Yang, Fang and Zhu, Ren-yuan (2014) LSO/LYSO Crystals for Calorimeters in Future HEP Experiments. IEEE Transactions on Nuclear Science, 61 (1). pp. 483-488. ISSN 0018-9499.

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Because of their high stopping power (X_0=1.14 cm), fast (τ = 40 ns) bright (4 times BGO) scintillation with small temperature coefficient (-0.2%/°C) and superb radiation hardness, LSO/LYSO crystals are chosen to construct electromagnetic calorimeters (ECAL) of total absorption nature. One critical issue for this application is the light response uniformity (LRU) of long crystal bars with tapered geometry, which is affected by the non-uniform light yield along the crystal, the self-absorption and the optical focusing effect. Following a ray-tracing simulation study, an uniformization method was developed by roughening one side surface with LRU of better than 3% achieved. LSO/LYSO crystals are also proposed as the active material for a sampling ECAL for future HEP experiments in severe radiation environment. Preliminary designs with Pb or W absorber are described. Measurements of light collection efficiency (LCE) for prototype Shashlik cells with wavelength shifting fiber readout are presented. Future development on LSO/LYSO crystal based sampling ECAL is discussed.

Item Type:Article
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URLURL TypeDescription
Zhang, Liyuan0000-0002-0898-787X
Zhu, Ren-yuan0000-0003-3091-7461
Additional Information:© 2014 IEEE. Manuscript received May 24, 2013; revised August 09, 2013; accepted August 26, 2013. Date of publication October 17, 2013; date of current version February 06, 2014. This work was supported in part by the U.S. Department of Energy under Grant DE-FG03-92-ER-40701. The authors would like to thank the LSO/LYSO crystal producers and colleagues from the SuperB, Mu2e and CMS experiments for many useful discussions.
Funding AgencyGrant Number
Department of Energy (DOE)DE-FG03-92-ER-40701
Subject Keywords:Crystal, emission, light attenuation length, light output, light response uniformity (LRU), ray-tracing, sampling calorimeter, scintillator, Shashlik, transmittance.
Issue or Number:1
Record Number:CaltechAUTHORS:20140529-113243074
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Official Citation:Liyuan Zhang; Rihua Mao; Fang Yang; Ren-yuan Zhu, "LSO/LYSO Crystals for Calorimeters in Future HEP Experiments," Nuclear Science, IEEE Transactions on , vol.61, no.1, pp.483,488, Feb. 2014 doi: 10.1109/TNS.2013.2279993
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:45966
Deposited By: Ruth Sustaita
Deposited On:29 May 2014 19:37
Last Modified:09 Mar 2020 13:19

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