First ground-level laboratory test of the two-phase xenon emission detector RED-100
D.Yu. Akimov, V. Belov, A. Bolozdynya, A. Dolgolenko, Y. Efremenko, A. Etenko, A. V. Galavanov, D. V. Gouss, Y. Gusakov, D. E. Kdib, А. В. Хромов, A. M. Konovalov, В. Н. Корноухов, A. G. Kovalenko, E.S. Kozlova, A. Kumpan, A. V. Lukyashin, Y. Melikyan, V.V. Moramzin, D.A. Nischeta, O. Razuvaeva, D. Rudik, A.V. Shakirov, G. Simakov, V. Sosnovtsev, Yu. V. Stogov, А. А. Васин
Abstract
RED-100 is a two-phase detector for study of coherent elastic scattering of reactor electron antineutrinos off xenon atomic nuclei. The detector contains a total of 200 kg of liquid xenon in a titanium cryostat with 160 kg of xenon in active volume inside a Teflon-made light collection cage associated with electrode system. The active volume is viewed by two arrays of nineteen 3"-diameter Hamamatsu R11410-20 PMTs assembled in two planes on top and bottom. The electrode system is equipped with an electron shutter (a patented device) to reduce a "spontaneous" single-electron noise. The detector was tested in a ground-level laboratory. The obtained results demonstrate that detection of coherent elastic scattering of reactor antineutrinos off xenon nuclei at Kalinin nuclear power plant with the RED-100 detector is feasible with a threshold of 4 ionization electrons.