Measurements of wavelength-dependent double photoelectron emission from single photons in VUV-sensitive photomultiplier tubes
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2015
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Abstract
Measurements of double photoelectron emission (DPE) probabilities as a function of wavelength are reported for Hamamatsu R8778, R8520, and R11410 VUV-sensitive photomultiplier tubes (PMTs). In DPE, a single photon strikes the PMT photocathode and produces two photoelectrons instead of a single one. It was found that the fraction of detected photons that result in DPE emission is a function of the incident photon wavelength, and manifests itself below ~250 nm. For the xenon scintillation wavelength of 175 nm, a DPE probability of 18–24% was measured depending on the tube and measurement method. This wavelength-dependent single photon response has implications for the energy calibration and photon counting of current and future liquid xenon detectors such as LUX, LZ, XENON100/1T, Panda-X and XMASS.
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gaitskell2015journalmeasurements
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| Authors | C.H. Faham,V.M. Gehman,A. Currie,A. Dobi,P. Sorensen,R.J. Gaitskell;C.H. Faham;V.M. Gehman;A. Currie;A. Dobi;P. Sorensen;R.J. Gaitskell; |
| Journal | journal of instrumentation |
| Year | 2015 |
| DOI |
10.1088/1748-0221/10/09/p09010
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