Long Baseline Neutrino Facility

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.

  • Beamline requires precision measurements

    August 2, 2016

    Scientists with the Deep Underground Neutrino Experiment (DUNE) hope to shed light on the mysteries of the elusive neutrino. So they’ll aim a beam of neutrinos straight through the earth from Fermilab in Batavia, Ill., to detectors on the 4850 Level of Sanford Lab in Lead, S.D. To get the best signal, the center of the beam needs to hit the detectors head on—and that’s where things get a little tricky. 

  • DUNE and LBNF on the Move

    July 1, 2015

    Adapted from the July 21, 2015 edition of Fermilab Today By Joe Lykken

    Two weeks ago a distinguished committee of 24 experts conducted a comprehensive Critical Decision 1 review of the DUNE and LBNF projects for the Department of Energy. Steve Meador, head of the Office of Project Assessment for the DOE Office of Science, chaired the review, with Jim Siegrist and Mike Procario from the DOE Office of High Energy Physics observing.

  • Public LBNE meetings this week

    June 5, 2013

    A final reminder, there will be two public meetings this week that will explain to local communities the upcoming environmental assessment for the Long-Baseline Neutrino Experiment (LBNE). The meetings will be 6:30 p.m. to 8:30 p.m. on Tuesday at the Days Inn in Lead and on Wednesday at the Ramkota Convention Center in Rapid City. (See the calendar at for details.)