Abstract
The new experiment S3 devoted to the study of reactor antineutrinos was designed and constructed as a common activity of IEAP CTU in Prague and JINR (Dubna). The S3 detector is a compact, highly segmented polystyrene-based scintillating detector composed of 80 detector elements with a gadolinium neutron converter between elements layers. A positron and a neutron are produced in an inverse beta decay initiated with an electron antineutrino in the detector. A modular multi-channel fast ADC was developed for the data acquisition for the whole 80-channel S3 detector and the 4-channel cosmic veto system. The detector meets very strict safety rules of nuclear power plants and can be installed in a chamber located immediately under the reactor. The close vicinity from the reactor enables to study neutrino properties with a higher efficiency, to investigate neutrino oscillations at short baselines and try to verify the hypothesis of a sterile neutrino. The details of the design and construction of the S3 detector, as well as properties of the modular multi-channel fast ADC system, and first tests of the device are presented.
Highlights
NUCLEAR power reactor is one the most intense mancontrolled source of the pure electron antineutrinos
A typical 3 GWth (e.g. VVER-1000 in Temelin, CZE) nuclear power reactor emits about 1021 electron antineutrinos/s/4π
The aim of the S3 experiment [1], [2], [3] was to construct a compact antineutrino detector, which does not contain dangerous materials and can be installed in the reactor building. Such detector could contribute to the investigation of the neutrino oscillations at very short baselines (⁓m) and verification or rejection of the sterile neutrino hypothesis
Summary
NUCLEAR power reactor is one the most intense mancontrolled source of the pure electron antineutrinos. The aim of the S3 experiment [1], [2], [3] was to construct a compact antineutrino detector, which does not contain dangerous materials and can be installed in the reactor building. Such detector could contribute to the investigation of the neutrino oscillations at very short baselines (⁓m) and verification or rejection of the sterile neutrino hypothesis. The DANSS detector is a highly-segmented polystyrene based scintillating detector, which consists of 2500 scintillating elements (4 cm x 1 cm x 100 cm) It is installed on a movable platform measuring the antineutrino flux at different positions from the reactor. It will be used as a reference detector measuring the reactor antineutrinos at a fixed position from the reactor while the position of the DANSS detector will change
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