Deep neutrino experiment construction begins

Deep Neutrino Experiment Construction Begins

The Deep Underground Neutrino Experiment (DUNE) is moving from planning to physical build. crews have started installing the steel framework for the two cryostat modules that will each hold 17,000 tons of liquid argon, roughly a mile beneath the surface of South Dakota.

Cryostat Framework Installation

More than 6,200 tons of red steel beams—provided as an in‑kind contribution—are being lowered into the South and North caverns at the Sanford Underground Research Facility (SURF). A total of 2,600 beams will form the outer shells of the cryostats, creating the insulated environment needed to keep the argon at about –300 °F. SURF is handling shaft operations, logistics, and the assembly of the structures in partnership with a Minnesota‑based structural steel contractor.

International Collaboration

The project is a joint effort among Fermilab, CERN, and SURF, involving over 1,500 researchers worldwide. Fermilab’s director Norbert Holtkamp called DUNE its “top priority,” emphasizing the experiment’s potential to deepen our understanding of the universe and spark new technologies. CERN’s long‑baseline neutrino facility will send a beam of neutrinos 800 miles from Illinois to the underground detectors, enabling precise measurements of neutrino oscillations.

Looking Ahead

Installation of the steel framework is expected to continue through next year, with the cryostats eventually filled with liquid argon for data taking that could extend into the late 2040s. The construction phase not only advances fundamental physics but also brings high‑paying jobs and a hub for scientific talent to the Black Hills region.

--- The DUNE construction milestone underscores the scale of modern particle‑physics experiments and the collaborative effort required to explore the deepest questions about matter, the Big Bang, and the universe.