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Published September 1, 2012 | Submitted
Journal Article Open

A side-by-side comparison of Daya Bay antineutrino detectors


The Daya Bay Reactor Neutrino Experiment is designed to determine precisely the neutrino mixing angle θ_(13) with a sensitivity better than 0.01 in the parameter sin^22θ_(13) at the 90% confidence level. To achieve this goal, the collaboration will build eight functionally identical antineutrino detectors. The first two detectors have been constructed, installed and commissioned in Experimental Hall 1, with steady data-taking beginning September 23, 2011. A comparison of the data collected over the subsequent three months indicates that the detectors are functionally identical, and that detector-related systematic uncertainties are smaller than requirements.

Additional Information

© 2012 Elsevier B.V. Received 28 February 2012. Received in revised form 16 April 2012. Accepted 2 May 2012. Available online 22 May 2012. The Day a Bay experiment is supported in part by the Ministry of Science and Technology of China (contract no.2006CB808100), the United States Department of Energy (DE-AC02-98CH10886, DE-AS02-98CH1-886, DE-FG05-92ER40709, DE-FG02-07ER41518, DE-FG02-84ER-40153, DE-FG02-91ER40671, E-FG02-08ER41575, DE-FG02-88ER40397, DE-SC0003915, and DE-FG02-95ER40896), the Chinese Academy of Sciences (KJCX2-EW-N08), the National Natural Science Foundation of China (Project number 10890090),the Guangdong Provincial Government (Project number 2011A090100015), the Shenzhen Municipal Government, the China Guangdong Nuclear Power Group, Shanghai Laboratory for Particle Physics and Cosmology, the Research Grants Council of the Hong Kong Special Administrative Region of China (Project numbers 2011A090100015, 400805, 703307, 704007 and 2300017), the focused investment scheme of CUHK and University Development Fund of The University of Hong Kong, the MOE Program for Research of Excellence at National Taiwan University and NSC funding support from Taiwan, the U.S. National Science Foundation (Grants PHY-0653013, PHY-0650979, PHY-0555674, PHY-0855538 and NSF03-54951), the Alfred P. Sloan Foundation, the University of Wisconsin, the Virginia Polytechnic Institute and State University, Princeton University, California Institute of Technology, University of California at Berkeley, the Ministry of Education, Youth and Sports of the Czech Republic (Project numbers MSM0021620859 and ME08076), the Czech Science Foundation (Project number GACR202/08/0760), and the Joint Institute of Nuclear Research in Dubna, Russia. We are grateful for the ongoing cooperation from the China Guangdong Nuclear Power Group and China Light & Power Company.

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