Putting together blocks for the NOvA far detector

Workers laid down the first layer of Block 0 for the NOvA far detector in Ash River, Minn. Photo: Ron Williams, University of Minnesota

On July 26, a construction crew working on the NOvA far detector in Ash River, Minn., began putting in place the detector’s first block, called Block 0.

Blocks are made up of 32 layers of PVC tubes, each filled with oil. The tubes will detect the faint light that neutrinos create when smashing into atoms in the oil.

When completed, the detector will comprise 30 200-ton blocks.

Watch workers assemble the prototype blocks for the NOvA far detector.