LZ's Central Detector During Assembly (IMAGE) DOE/Lawrence Berkeley National Laboratory Caption LZ's central detector, pictured here during assembly, is located inside a large water tank on the 4850 Level of Sanford Lab, nearly a mile underground. LZ will search for theorized dark matter particles known as WIMPs. Credit Nick Hubbard/Sanford Lab Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.