Speaker
Mr.
Yury Melikyan
(NRNU MEPhI)
Description
The RED-100 two-phase xenon emission detector utilizes Hamamatsu R11410-20 PMTs to detect VUV luminescent photons. It was observed, that the background PMT illumination with the luminescent light from cosmogenic muons leads to signal generation at the PMT anode even when the photocathodes are blocked with the help of a dedicated controllable PMT base. We attribute this fact to the photoelectric effect occurring at the PMT first dynode. Results of quantitative measurements of its influence on the RED-100 photodetection system performance are presented here, including the estimation of the first dynode’s quantum efficiency, which is measured to be ≥9%.
Primary authors
Mr.
Aleksey Shakirov
(MEPhI)
Prof.
Alexander Bolozdynya
(NRNU MEPhI)
Alexander Khromov
(NRNU MEPhI)
Dr.
Dmitry Akimov
(ITEP and MEPhI)
Ms.
Ekaterina Kozlova
(NRNU MEPhI)
Mr.
Valery Sosnovtsev
(NRNU MEPhI)
Mr.
Vladimir Belov
(Institute for Theoretical and Experimental Physics)
Dr.
Vladimir Kaplin
(NRNU MEPhI)
Mr.
Yury Melikyan
(NRNU MEPhI)
