Study of radiation hardness of pure CsI crystals for Belle-II calorimeter

Boyarintsev, A.; Boyarintseva, Y.; Gektin, A.; Shiran, N.; Shlyakhturov, V. V.; Taranyuk, V.; Тимошенко, Н. М.; Bobrov, A.; Garmash, A.; Golkovski, Mikhail G.; Kuzmin, A.; Matvienko, D.; Savrovski, P.; Shebalin, V.; Shwartz, B.; Vinokurova, A.; Vorobyev, V.; Zhilich, V.; Krumshtein, Z.V.; Nozdrin, A.; Оlshevsky, А.G.

doi:10.1088/1748-0221/11/03/p03013

Cited by 9 publications

(4 citation statements)

References 13 publications

(21 reference statements)

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“…The purpose of this work is to quantify the radiation hardness of 30 cm long CsI(Tl) crystals at uniform doses up to 1000 Gy using spare crystal samples from the Belle and BABAR experiments. With current estimates, in the 10 year lifetime of the Belle II experiment the accumulated dose in crystals in the Belle II endcaps could reach 100 Gy [14]. Our measurement up to 1000 Gy provides an additional factor of 10 safety factor beyond these estimates.…”

Section: Introductionmentioning

confidence: 60%

Radiation hardness of 30 cm long CsI(Tl) crystals

Longo

Roney

2016

J. Inst.

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Measurements of the degradation in performance of 30 cm long CsI(Tl) scintillation crystals exposed to 1 MeV photon doses of 2, 10, 35, 100 and 1000 Gy are presented. The light yield, light yield longitudinal non-uniformity, scintillation decay times, energy resolution and timing resolution of a set of spare crystals from the BABAR and Belle experiments are studied as a function of these doses. In addition, a model that describes the plateau observed in the light output loss as a function of dose in terms of increase in concentrations of absorption centres with irradiation is presented.

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Section: Introductionmentioning

confidence: 60%

Radiation hardness of 30 cm long CsI(Tl) crystals

Longo

Roney

2016

J. Inst.

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“…Illustrating this, the recent -1 -report by the KOTO experiment [1] was the first demonstration of energetic neutron vs. photon separation using pulse shape discrimination in pure CsI. The fast timing and radiation hardness of pure CsI [11][12][13] allow it to find application at several recent particle and nuclear physics experiments including KOTO [1], PIENU [14], and PIBETA [15] as well as planned use in the future experiments Mu2e [16] and the Super Charm-Tau Factory [13,17,18]. In this paper the pulse shape discrimination capabilities of pure CsI are explored further by comparing the scintillation response to energy deposits from energetic neutrons and cosmic muons.…”

Section: Introductionmentioning

confidence: 91%

Energetic neutron identification with pulse shape discrimination in pure CsI crystals

et al. 2022

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Pulse shape discrimination with pure CsI scintillators is investigated as a method for separating energy deposits by energetic neutrons and photons at particle physics experiments. Using neutron data collected near the European XFEL XS1 beam window the pulse shape discrimination capabilities of pure CsI are studied and compared to CsI(Tl) using near-identical detector setups, which were operated in parallel. The inelastic interactions of 100 MeV neutrons are observed to produce a slower scintillation emission in pure CsI relative to energy deposits from cosmic muons. By employing a charge-ratio method for pulse shape characterization, pulse shape discrimination with pure CsI is shown to be effective for identifying energy deposits from neutrons vs. cosmic muons, however, pure CsI was not able resolve the specific type of neutron inelastic interactions as can be done with CsI(Tl). Using pulse shape discrimination, the rate of energetic neutron interactions in a pure CsI detector is measured as a function of time and shown to be correlated with the European XFEL beam power. The results demonstrate that pulse shape discrimination with pure CsI has significant potential to improve electromagnetic vs. hadronic shower identification at future particle physics experiments.

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“…The electromagnetic calorimeter (ECAL), as an important part of the spectrometer, in addition to high-efficiency and highprecision gamma detection, also needs good enough time performance for background suppression and gamma-hadron discrimination, etc [2]. Due to the high background level induced by the high luminosity in STCF experiment, pure CsI is selected as the scintillation crystal owing to its fast response, high mass density and good radiation hardness [3,4]. Considering the relatively low light yield of pure CsI crystal, the scintillation light is converted by avalanche photodiode (APD) to obtain an internal gain of 50.…”

Section: Introductionmentioning

confidence: 99%

Study on time measurement for CSA-based readout electronics in STCF ECAL

Luo¹,

Jia²,

Shen³

et al. 2022

J. Inst.

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Super Tau-Charm Facility (STCF) will provide unique support for particle physics research in China owing to its high luminosity and large dynamic range. Its electromagnetic calorimeter (ECAL) is designed as a new type of calorimeter which can perform high-precision energy and time measurement at the same time. Considering the high event rate and pile up induced by high luminosity, and the large channel number scale of ECAL, the readout electronics needs to adopt a high-precision, unconventional, and real-time processing method to reduce the data amount in transmission. Based on the charge-sensitive front-end electronics in energy measurement, an online time measurement method based on waveform fitting algorithm has been studied and implemented in this work. The parameters which would affect the time resolution are analyzed according to simulation and experimental test. After the optimization of electronics, a time resolution of 165 ps at the equivalent deposition energy of 1 GeV is achieved, which indicates that the waveform fitting method based on charge-sensitive readout electronics can meet the future requirements.

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Study of radiation hardness of pure CsI crystals for Belle-II calorimeter

Cited by 9 publications

References 13 publications

Radiation hardness of 30 cm long CsI(Tl) crystals

Radiation hardness of 30 cm long CsI(Tl) crystals

Energetic neutron identification with pulse shape discrimination in pure CsI crystals

Study on time measurement for CSA-based readout electronics in STCF ECAL

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