Performance of wavelength-shifting fibers for the Mu2e cosmic ray veto detector

Dukes, E. C.; Farris, P.; Lam, T.; Oksuzian, Y.; Shooltz, D.

doi:10.1088/1748-0221/13/12/p12028

Cited by 6 publications

(6 citation statements)

References 6 publications

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“…Instead, the estimated efficiency (based on measured quantities, see table 1) is pre-applied to the number of initial EUV photons. The probability of a photon to reach a SiPM once it has been successfully wavelengthshifted in a fiber is determined by the product of the Y-11 fiber trapping efficiency assuming a doubleclad fiber with readout from both sides [15], transmission efficiencies in the Y-11 fibers (length of 4 * 1.5 m = 6 m) [26,27] and clear fibers (length of 7 m) [28], and losses from fiber transitions [29] and bends. Taking the product of the efficiencies in table 1, 3.32% of green photons produced in the WLS fibers will be transmitted to the SiPM readout.…”

Section: Jinst 17 T04007mentioning

confidence: 99%

Simulations of the nEDM@SNS light collection system efficiency

Loomis¹,

Cianciolo²,

Leggett³

2022

J. Inst.

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A system for collecting the scintillation light produced by the capture of ultra-cold neutrons (UCN) on polarized 3He is discussed and results from simulations of its performance are presented. This system will be implemented in nEDM@SNS, the experiment searching for the neutron electric dipole moment (nEDM) at the Spallation Neutron Source (SNS) at Oak Ridge National Laboratory. Simulation results show that the light collection system detects on average 17 photoelectrons per UCN-3He capture event (sufficient to generate a robust signal), reconstructs the event location in the beam direction to approximately 3 cm accuracy, detects capture events with a high and spatially uniform efficiency (0.95 with 1% variation), and rejects greater than 50% of beta decay background events.

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Section: Jinst 17 T04007mentioning

confidence: 99%

Simulations of the nEDM@SNS light collection system efficiency

Loomis¹,

Cianciolo²,

Leggett³

2022

J. Inst.

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“…The Mu2e collaboration which also uses Kuraray Y-11 WLS fibres has measured the attenuation length of the fibres, but over substantially longer fibre lengths of 25 m. In a 2015 study they applied a double-exponential fit to their data of the same form shown in equation (6.1) and extracted short and long attenuation lengths of 4.76 and 9.02 m, respectively [34]. A later study in 2018 separated the data into two independent exponential fits over the ranges 0.5-3.0 m and 3.0-25.0 m, and again extracting short and long attenuation lengths, this time of 5.1 ± 0.2 and 8.2 ± 0.1 m, respectively [35]. In both cases their short attenuation length measurement is consistent with the (double-ended readout bars) long attenuation lengths we have obtained.…”

Section: Jinst 17 P10028mentioning

confidence: 99%

Scintillator ageing of the T2K near detectors from 2010 to 2021

et al. 2022

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The T2K experiment widely uses plastic scintillator as a target for neutrino interactions and an active medium for the measurement of charged particles produced in neutrino interactions at its near detector complex. Over 10 years of operation the measured light yield recorded by the scintillator based subsystems has been observed to degrade by 0.9–2.2% per year. Extrapolation of the degradation rate through to 2040 indicates the recorded light yield should remain above the lower threshold used by the current reconstruction algorithms for all subsystems. This will allow the near detectors to continue contributing to important physics measurements during the T2K-II and Hyper-Kamiokande eras. Additionally, work to disentangle the degradation of the plastic scintillator and wavelength shifting fibres shows that the reduction in light yield can be attributed to the ageing of the plastic scintillator. The long component of the attenuation length of the wavelength shifting fibres was observed to degrade by 1.3–5.4% per year, while the short component of the attenuation length did not show any conclusive degradation.

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“…Fiber choice. Kuraray Y-11 fibers [20] have been thoroughly characterized by multiple experimental groups [21][22][23]. The Y-11 absorption spectrum has good overlap with the TPB emission spectrum [13,14], and the Y-11 emission spectrum is peaked near 500 nm, well-suited for many SiPMs.…”

Section: Design and Implementation Detailsmentioning

confidence: 99%

A novel silicon photomultiplier readout architecture for low-light applications

et al. 2022

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In this article we describe the photon detection readout electronics for the nEDM@SNS experiment. The chosen “photon counting” architecture, which utilizes high-efficiency silicon photomultipliers (SiPMs) and is appropriate for low-light applications, allows the use of a relatively high SiPM operating voltage. This maximizes photon detection efficiency and minimizes gain/efficiency voltage-dependence while eliminating direct optical cross-talk.

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Performance of wavelength-shifting fibers for the Mu2e cosmic ray veto detector

Cited by 6 publications

References 6 publications

Simulations of the nEDM@SNS light collection system efficiency

Simulations of the nEDM@SNS light collection system efficiency

Scintillator ageing of the T2K near detectors from 2010 to 2021

A novel silicon photomultiplier readout architecture for low-light applications

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