Daya Bay Antineutrino Detector Gas System

Abstract

The Daya Bay Antineutrino Detector gas system is designed to protect the liquid scintillator targets of the antineutrino detectors against degradation and contamination from exposure to ambient laboratory air. The gas system is also used to monitor the leak tightness of the antineutrino detector assembly. The cover gas system constantly flushes the gas volumes above the liquid scintillator with dry nitrogen to minimize oxidation of the scintillator over the five year lifetime of the experiment. This constant flush also prevents the infiltration of radon or other contaminants into these detecting liquids keeping the internal backgrounds low. Since the Daya Bay antineutrino detectors are immersed in the large water pools of the muon veto system, other gas volumes are needed to protect vital detector cables or gas lines. These volumes are also purged with dry gas. Return gas is monitored for oxygen content and humidity to provide early warning of potentially damaging leaks. The design and performance of the Daya Bay Antineutrino Detector gas system is described.

submitted to JINST

References in corpus (2)

• Observation of electron-antineutrino disappearance at Daya Bay
• Observation of Reactor Electron Antineutrino Disappearance in the RENO Experiment

Cited by in corpus (5)

• The Detector System of The Daya Bay Reactor Neutrino Experiment
• Assembly and Installation of the Daya Bay Antineutrino Detectors
• The Radon Monitoring System in Daya Bay Reactor Neutrino Experiment
• The Daya Bay Antineutrino Detector Filling System and Liquid Mass Measurement
• Target Mass Monitoring and Instrumentation in the Daya Bay Antineutrino Detectors