Daya Bay Reactor Neutrino Experiment is a particle physics experiment to be carried out in Daya Bay, Guangdong, China for studying neutrino oscillation. It aims to measure the last neutrino mixing angle θ13 using anti-neutrinos from β decays in the reactors of Daya Bay, Ling Ao and the future Ling Tung Nuclear Power Plants. A sensitivity of <0.01 for sin22θ13, within 90% confidence level, is expected.
The Daya Bay site has 3 baselines ranging from 350m to 2km, with an overburden of 270 to 900 m.w.e. The proposed 3-zone detectors will consists of detector modules each holding ~20 tonnes of Gadolinium-doped liquid scintillator. By 2010, the Daya Bay power plants will reach a total output of 17.4GW, making this cluster one of the five most powerful ones in the world.
Geotechnical survey at Daya Bay has been completed and civil construction will begin later 2007. Data taking is expected to begin in 2010. This project is a collaboration of more than 100 scientists from China, Czech Republic, Russia, and the U.S..
Aberdeen Tunnel Laboratory is the only underground particle physics laboratory in Hong Kong. It was built in 1980s by The University of Hong Kong and housed a muon telescope for studying anisotropy in cosmic ray background.
The laboratory has been fully refurbished since its reopening in 2004. The new detector consists of a movable muon tracker with 72 proportional counters and 63 plastic scintillators, and a neutron detector containing ~0.5 tonne of Gadolinium-doped liquid scintillator. It will measure the angular distribution and flux of cosmic muons and their contribution to neutron background in underground laboratories. The Aberdeen Tunnel Experiment is also part of the Daya Bay Neutrino Experiment, as cosmic muon-induced neutrons is the major source of background in detecting the antineutrino events.
NewsLast Updated on May 10 2014:
Daya Bay Experiment paper "Spectral Measurement of Electron Antineutrino Oscillation Amplitude and Frequency at Daya Bay" published in Physical Review Letters, Volume 112, Issue 6...... more
Aberdeen Tunnel Experiment paper "An apparatus for studying spallation neutrons in the Aberdeen Tunnel laboratory" published in Nuclear Instruments And Methods In Physics Research, Section A, Volume 723...... more
Daya Bay Experiment paper "Improved measurement of electron antineutrino disappearance at Daya Bay" published in Chinese Physics C, Volume 37, Number 1...... more
Daya Bay Experiment's achievement selected as one of ten top Breakthrough of the Year in 2012 by Science magazine...... more
Press release of the first results from Daya Bay Experiment...... more
Daya Bay Experiment paper "A side-by-side comparison of Daya Bay antineutrino detectors" published in Nuclear Instruments And Methods In Physics Research, Section A, Volume 685...... more
Daya Bay Experiment paper "Observation of Electron-Antineutrino Disappearance at Daya Bay" published in Physical Review Letters, Volume 108, Issue 17...... more
Daya Bay Experiment and the Aberdeen Tunnel Experiment featured as cover story in HKU Bulletin...... more
Our researcher, Dr. Talent Kwok, interviewed by RTHK on the Daya Bay Experiment and the Aberdeen Tunnel Experiment...... more
The first Overseas Chinese Physics Association (OCPA) Workshop on Underground Science to be held at University of Hong Kong on 21-23 July 2008...... more
New Attenuation Length Measurement webpage is launched...... more
New Neutron Detector Design webpage is launched...... more
Daya Bay Experiment in Symmetry magazine, Nov 2006 more
Daya Bay Experiment in Physics Today, Nov 2006 more
Daya Bay Collaboration Meeting at University of Hong Kong, 12 - 15 Jan 2006. more
Installation of plastic scintillators
and proportional counters at Aberdeen Tunnel Laboratory
click here for an animated 3-D model of the detector.
Daya Bay Experiment and Aberdeen
Tunnel Laboratory featured in Wen Wei Pao...... more
Reproduced from Wen Wei Pao 8th June 2006. ©Wen Wei Pao 2006. All rights reserved.