A mile underground in South Dakota, construction crews have worked diligently to carve out an extensive network of caverns and tunnels that one day will house a huge neutrino experiment. Their efforts have paid off: With almost 400,000 tons of rock extracted from the earth, the excavation has reached the halfway point.
Excavation of the large caverns for the Long-Baseline Neutrino Facility is in full swing. Over a third of the whopping 800,000 tons that need to be extracted from a mile underground have been removed. When finished, the underground facility will cover an area about the size of eight soccer fields and provide space for the international Deep Underground Neutrino Experiment.
This spring testing wrapped up at the PIP-II Injector Test Facility, or PIP2IT. The successful outcome paves the way for the construction of PIP-II, a new particle accelerator that will power record-breaking neutrino beams and drive a broad physics research program at Fermilab for the next 50 years.