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Development of Yttrium Doped BaF_2 Crystals for Future HEP Experiments

Hu, Chen and Xu, Chao and Zhang, Liyuan and Zhang, Qinghui and Zhu, Ren-Yuan (2019) Development of Yttrium Doped BaF_2 Crystals for Future HEP Experiments. IEEE Transactions on Nuclear Science, 66 (7). pp. 1854-1860. ISSN 0018-9499. https://resolver.caltech.edu/CaltechAUTHORS:20190523-125242724

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Abstract

Because of their ultrafast scintillation with subnanosecond decay time, barium fluoride (BaF_2) crystals have attracted broad interest in the high energy physics and nuclear physics communities. One crucial issue, however, is its slow scintillation component with 600-ns decay time, which causes pile-up in a high rate environment. Previous studies show that the slow component can be suppressed effectively by rare earth doping. In this paper, we report investigations on a set of Φ 18 x 21 mm^3 BaF_2 cylinders doped with different yttrium levels grown at Beijing Glass Research Institute (BGRI), from which the optimized yttrium doping level was determined. A Φ 40 x 160 mm^3 BaF_2 ingot with 5 atomic % (at.%) yttrium doping was consequently grown at BGRI and was used to cut one 25 x 25 x100 mm^3 crystal and several thin slices. Their optical and scintillation properties were measured at Caltech. The results show that yttrium doping effectively suppresses the slow component while maintaining its ultrafast light unchanged. Research and development will continue to develop large-size BaF_2:Y crystals with improved optical quality for a fast BaF_2:Y crystal calorimeter for Mu2e-II.


Item Type:Article
Related URLs:
URLURL TypeDescription
https://doi.org/10.1109/tns.2019.2918305DOIArticle
ORCID:
AuthorORCID
Hu, Chen0000-0002-3285-4831
Zhang, Liyuan0000-0002-0898-787X
Zhu, Ren-Yuan0000-0003-3091-7461
Alternate Title:Development of Yttrium Doped BaF2 Crystals for Future HEP Experiments
Additional Information:© 2018 IEEE. Manuscript received January 11, 2019; revised April 19, 2019; accepted May 19, 2019. Date of publication May 22, 2019; date of current version July 16, 2019. This work was supported by the U.S. Department of Energy through the Office of High Energy Physics Program under Award DE-SC0011925.
Funders:
Funding AgencyGrant Number
Department of Energy (DOE)DE-SC0011925
Subject Keywords:Barium fluoride (BaF2), slow scintillation component suppression, yttrium doping
Issue or Number:7
Record Number:CaltechAUTHORS:20190523-125242724
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20190523-125242724
Official Citation:C. Hu, C. Xu, L. Zhang, Q. Zhang and R. Zhu, "Development of Yttrium-Doped BaF2 Crystals for Future HEP Experiments," in IEEE Transactions on Nuclear Science, vol. 66, no. 7, pp. 1854-1860, July 2019. doi: 10.1109/TNS.2019.2918305
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:95737
Collection:CaltechAUTHORS
Deposited By: Tony Diaz
Deposited On:23 May 2019 19:59
Last Modified:09 Mar 2020 13:19

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