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<p>Photomultiplier tubes, designed to pick up faint light signals from particle interactions, line the inside of a detector for the Daya Bay Reactor Neutrino experiment. (Credit: Roy Kaltschidt/Berkeley Lab)</p>

Scientists Say Farewell to Daya Bay Site, Proceed with Final Data Analysis

The Daya Bay Reactor Neutrino Experiment collaboration – which made a precise measurement of an important neutrino property eight years ago, setting the stage for a new round of experiments and discoveries about these hard-to-study particles – has finished taking data. Though the experiment is formally shutting down, the collaboration will continue to analyze its complete dataset to improve upon the precision of findings based on earlier measurements.

<p>A collection of images from past, present, and pending neutrino science experiments, including: Daya Bay, DUNE at LBNF, the Homestake experiment, IceCube, KamLAND, ProtoDUNE and SNO. Displayed in the background is the text of a letter that physicist Wolfgang Pauli had written on Dec. 4, 1930, postulating the existence of the neutrino.</p>

90 Years of Neutrino Science

Berkeley Lab has a long history of participating in neutrino experiments and discoveries in locations ranging from a site 1.3 miles deep at a nickel mine in Ontario, Canada, to an underground research site near a nuclear power complex northeast of Hong Kong, and a neutrino observatory buried in ice near the South Pole.