|Workers continue to excavate the NOvA Near-Detector Cavern. Photo: Cindy Arnold|
The excavation of the NOvA Near-Detector Cavern continues. In this north-facing picture, the entrance to the NOvA Detector Cavern is to the left. Temporary duct work removes dust-laden air for workers’ protection. It also creates negative pressure in the construction area, ensuring that dust does not pass into the detector hall or the emergency escape passageway.
The electronics alcove for the cavern is visible just past the cavern entrance.