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Published June 21, 2014 | Submitted
Journal Article Open

Automated calibration system for a high-precision measurement of neutrino mixing angle θ_(13) with the Daya Bay antineutrino detectors


We describe the automated calibration system for the antineutrino detectors in the Daya Bay Neutrino Experiment. This system consists of 24 identical units instrumented on 8 identical 20-ton liquid scintillator detectors. Each unit is a fully automated robotic system capable of deploying an LED and various radioactive sources into the detector along given vertical axes. Selected results from performance studies of the calibration system are reported.

Additional Information

© 2014 Elsevier B.V. Received 18 November 2013; Received in revised form 24 February 2014; Accepted 24 February 2014; Available online 11 March 2014. This work was done with support from the US DoE, Office of Science, High Energy Physics, the US National Science Foundation, the Natural Science Foundation of China Grants 11005073 and 11175116, the Shuguang Foundation of Shanghai Grant Z1127941, and Shanghai Laboratory for Particle Physics and Cosmology at the Shanghai Jiao Tong University. The authors gratefully acknowledge the strong technical support of R. Cortez, J. Pendlay, and A. Raygoza of the Kellogg Radiation Laboratory at Caltech. This paper is dedicated to the memory of Ray Cortez, who had been a primary designer and chief machinist of this system. We acknowledge numbers of summer intern students from Caltech and Shanghai Jiao Tong University who had contributed to the design, fabrication, and installation of this system. We thank Xichao Ruan and his colleagues from Chinese Institute of Atomic Energy for providing radioactive sources to the system, and the DAQ and Slow Control group from the Institute of High Energy Physics for implementing interfaces to the calibration software. We are grateful to the rest of the Daya Bay collaborators, particularly Jeff Cherwinka from University of Wisconsin for his continuous professional engineering support throughout the years. We thank the Daya Bay on-site installation team for their dedicated work.

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