Facility for the Deep Underground Neutrino Experiment

A global neutrino physics community is developing a leading-edge, dual-site experiment for neutrino science and proton decay studies, the Deep Underground Neutrino Experiment (DUNE), hosted at Fermilab in Batavia, IL.

The facility required for this experiment, the Long-Baseline Neutrino Facility (LBNF), is an internationally designed, coordinated and funded program. Once it is completed, it will comprise the world's highest-intensity neutrino beam, at Fermilab, and the infrastructure necessary to support massive, cryogenic far detectors installed deep underground at the Sanford Underground Research Facility (SURF), 800 miles (1,300 km) downstream, in Lead, SD. LBNF is also responsible for the facilities to house the experiment's near detectors on the Fermilab site.

LBNF is tightly coordinated with the DUNE collaboration designing the detectors that will carry out its experimental program.

The DUNE Experiment and Collaboration

The Deep Underground Neutrino Experiment, conducted with the detectors installed in the LBNF facility, is expected to achieve transformative discoveries, making definitive determinations of neutrino properties, the dynamics of the supernovae that produced the heavy elements necessary for life, and the possibility of proton decay.

The DUNE scientific collaboration is responsible for designing, building and operating the detectors to do the experiment. The LBNF beamline, which will supply the required intense beam of neutrinos to the detectors at the near and far sites, builds on Fermilab's existing world-class accelerator complex, including the Main Injector and the planned Proton Improvement Plan-II (PIP-II).

Sending neutrinos on a 1,300 km (800 mi) journey

Neutrinos created by the LBNF beamline will travel 1,300 km (800 mi) to intercept DUNE's massive, cutting-edge neutrino detector at the Sanford Lab. The neutrino beam’s path will lead straight through the earth's mantle. Neutrinos pass easily through soil and rock — or kilometers of solid lead, for that matter — rarely interacting with the matter. No tunnel is needed for these ghostly particles.

For a fun, accessible, quick education on neutrinos, visit All Things Neutrino.
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How do we know this is safe?

Neutrinos are among the most abundant particles in the universe, a billion times more abundant than the particles that make up stars, planets and people. Each second, a trillion neutrinos from the sun and other celestial objects pass harmlessly and unnoticed through your body — and everything else. Although neutrinos are all around us, they interact so rarely with other matter that they are very difficult to observe, and consequently, they are completely harmless.

An Environmental Assessment conducted for the LBNF/DUNE project is available; it includes results from an investigation of potential impacts to human health and the environment from the construction and operation of the technical and civil facilities, and finds that the project will have no significant environmental or health-related impacts.

Media Highlights

LBNF pre-excavation work is in full swing

Excavating about 800,000 tons of rock a mile underground, bringing it to the surface, and then transporting it to its final resting place is a huge job and part of the LBNF/DUNE project. Creating the infrastructure for that job is a huge amount of work by itself and is going on right now... Read more...

Pre-excavation work on LBNF/DUNE begins in South Dakota

An international project to build the largest physics experiment ever constructed in the United States took a major step forward as a new phase of work has begun at the project’s South Dakota site. The U.S. Department of Energy's Fermi National Accelerator Laboratory has finalized an agreement with construction firm Kiewit-Alberici Joint Venture (KAJV) to start pre-excavation work for the Long-Baseline Neutrino Facility (LBNF), which will house the enormous particle detectors for the Deep Underground Neutrino Experiment (DUNE). The South Dakota portion of the facility will be built a mile beneath the surface at the Sanford Underground Research Facility in Lead, South Dakota. Read more...

Success after a three-year sprint

When scientists plan to build a new particle detector, they run simulations to get a picture of what the particle interactions will look like. After constructing and starting up the real thing, they expect a period of tuning, adjusting, fiddling and fixing to get things running smoothly. They normally don't expect to turn the detector on and see particle tracks of a quality that exceeds their idealized simulations, especially when it is a prototype detector. And then there is ProtoDUNE... Read more...

Patrick Weber to lead Fermilab's South Dakota Services Division

To support Fermilab services provided for LBNF, DUNE and other DOE-funded experiments that will operate at Sanford Lab, Fermilab has established a new organizational unit there and hired South Dakota native Patrick Weber to lead it. Weber, who will take on the role of head of Fermilab’s South Dakota Services Division on June 11, currently serves as policy advisor to South Dakota Governor Dennis Daugaard. As part of his broad portfolio within the governor’s office, Weber has worked with the South Dakota Science and Technology Authority that operates Sanford Lab. Read more...