The solar neutrino detector that nuclear chemist Ray Davis installed on the 4850 Level in the Homestake gold mine in the mid-1960s helped lead the way to a startling discovery—that neutrinos spontaneously change type or flavor. This phenomenon is called neutrino oscillation, and in 2002 Davis shared the Nobel Prize for Physics with Masatoshi Koshiba for his work in the field. Now a new generation of neutrino physicists are proposing another experiment at Homestake.
The discovery of neutrino oscillation led to many new research experiments, including a long baseline neutrino experiment at LBNF. Scientists will shoot a beam of neutrinos through the earth from Fermilab in Batavia, Ill., 800 miles to a target at the Sanford Underground Research Facility. More than 500 people from 90 institutions, including 139 from 35 institutions in eight non-U.S. countries, make up an international collaboration that is working together to plan and develop both the experimental facilities and the physics program. The project that could answer some of the most challenging questions facing physics in the 21st century.
The experiment is still in the design phase.
Links on this page (at right) offer detailed explanations of LBNF, formerly the Long Baseline Neutrino Experiment.