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Measurement of the relative Quantum Efficiency of Hamamatsu model R5912-20MOD photomultiplier tubes at liquid argon temperature

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arxiv 2107.05323 v1 pith:RU3OFJTX submitted 2021-07-12 physics.ins-det hep-ex

Qin Zhao , Mengyun Guan , Peng Zhang , Changgen Yang , Jiajun Li , Yuting Wei , Lei Wang , Youyu Gan
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Weixing Xiong
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classification physics.ins-dethep-ex
keywords temperaturemodelrelativeargonefficiencyhamamatsuliquidmeasurement
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The model R5912-20MOD photomultiplier tube(PMT) is made for cryogenic application by Hamamatsu. In this paper, we report on the measurement of relative quantum efficiency (QE) of this model PMT at liquid argon(LAr) temperature. Furthermore, a specially designed setup and relevant test method are introduced. The relative QE is measured in visible wavelengths with the PMT emerged in high purity nitrogen atmosphere. The results show that the change of QE at LAr temperature is within about 5% compared with room temperature around 420 nm. However, the QE increases about 10% in the shorter wavelength range and decreases significantly after 550 nm.

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  1. Demonstration of the light collection stability of a PEN-based wavelength shifting reflector in a tonne scale liquid argon detector

    physics.ins-det 2024-11 conditional novelty 6.0 of 10

    A tonne-scale liquid argon detector instrumented with 4 m^2 of PEN wavelength-shifting reflector shows no light-yield deterioration over 12 days.

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