Timing properties and pulse shape discrimination of LAB-based liquid scintillator

Li, Xiaobo; Hua-Lin, Xiao; Cao, Junpeng; Li, Jin; Ruan, Xichao; Yuekun, Heng

doi:10.1088/1674-1137/35/11/009

Cited by 27 publications

(24 citation statements)

References 17 publications

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“…However, the depolarization of Rayleigh scattering in LAB is too large to be ignored. The typical fluorescence time of absorption/reemission for liquid scintillators is several nano-seconds to which large detectors are sensitive [29,30]. To treat the depolarized part of Rayleigh scattering as absorption/reemission would increase the time response in simulations of large scintillator detectors and might affect the spatial resolutions and the detection efficiencies [31,32].…”

Section: Resultsmentioning

confidence: 99%

Spectroscopic study of light scattering in linear alkylbenzene for liquid scintillator neutrino detectors

et al. 2015

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We have set up a light scattering spectrometer to study the depolarization of light scattering in linear alkylbenzene. The scattering spectra show that the depolarized part of light scattering is due to Rayleigh scattering. The additional depolarized Rayleigh scattering can make the effective transparency of linear alkylbenzene much better than expected. Therefore, sufficient scintillation photons can transmit through large liquid scintillator detector, such as that of the JUNO experiment. Our study is crucial to achieving an unprecedented energy resolution of 3 %/ √ E(MeV) required for the JUNO experiment to determine the neutrino mass hierarchy. The spectroscopic method can also be used to examine the depolarization of other organic solvents used in neutrino experiments.

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Section: Resultsmentioning

confidence: 99%

Spectroscopic study of light scattering in linear alkylbenzene for liquid scintillator neutrino detectors

et al. 2015

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“…The importance of de-oxygenation in the ability to perform / discrimination was demonstrated. However, subsequent measurements made by [34,35] were unable to replicate the very effective separation observed between and events. As the setup and methodology were well understood and verified, it remains unclear why this particular result was seemingly better than other observations.…”

Section: Timing Measurementsmentioning

confidence: 99%

Development, characterisation, and deployment of the SNO+ liquid scintillator

Anderson¹,

Andringa²,

Anselmo³

et al. 2021

J. Inst.

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A liquid scintillator consisting of linear alkylbenzene as the solvent and 2,5-diphenyloxazole as the fluor was developed for the SNO+ experiment. This mixture was chosen as it is compatible with acrylic and has a competitive light yield to pre-existing liquid scintillators while conferring other advantages including longer attenuation lengths, superior safety characteristics, chemical simplicity, ease of handling, and logistical availability. Its properties have been extensively characterized and are presented here. This liquid scintillator is now used in several neutrino physics experiments in addition to SNO+.

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“…The primary fluors drastically increase the light output and shift the emission from the UV into the visible, where the PMTs operate most efficiently. Because of its popularity, the LAB+PPO properties have been characterized on the benchtop [50][51][52][53][54]. The properties of the fluor PTP are also well-studied [55], but for slightly different applications, such as for the X-ARAPUCA devices [56], and it is not a particularly common fluor to dissolve in LAB.…”

Section: Pmt Calibrationmentioning

confidence: 99%

Spectral photon sorting for large-scale Cherenkov and scintillation detectors

et al. 2020

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We describe here measurements with a new device, the "dichroicon," a Winston-style light concentrator built out of dichroic reflectors, which could allow large-scale neutrino detectors to sort photons by wavelength with small overall light loss. Photon sorting would benefit large-scale water or ice Cherenkov detectors such as Hyper-Kamiokande or ICECUBE by providing a measure of dispersion, which in turn could allow improved position reconstruction and timing. For scintillator detectors like JUNO, upgrades to SNO+ or KamLAND-ZEN, or to water-based liquid scintillator detectors like Theia, dichroicons would provide effective discrimination between Cherenkov and scintillation light, allowing them to operate as true hybrid detectors. Dichroicons are useful for wavelength discrimination in any photon-starved environment in which detection area is limited.We include measurements with a prototype dichroicon using first a Cherenkov source to show spectral photon sorting works as expected. We then present measurements of two different LAB-based liquid scintillator sources, and demonstrate discrimination between Cherenkov and scintillation light. On the benchtop we can identify Cherenkov light with better than 90% purity while maintaining a high collection efficiency for the scintillation light. First results from simulations of a large-scale detector are also presented.

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Timing properties and pulse shape discrimination of LAB-based liquid scintillator

Abstract: Xiao-Bo( ) 1,4;1) XIAO Hua-Lin()

Cited by 27 publications

References 17 publications

Spectroscopic study of light scattering in linear alkylbenzene for liquid scintillator neutrino detectors

Spectroscopic study of light scattering in linear alkylbenzene for liquid scintillator neutrino detectors

Development, characterisation, and deployment of the SNO+ liquid scintillator

Spectral photon sorting for large-scale Cherenkov and scintillation detectors

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