The 1952 Army Radiation Dosimetry Laboratory was established in building 9401 which had an underground vault, a Van de Graff machine, and AN/UDM-1A caesium-137 and AN/UDM-1 cobalt-60 calibration sources. The building had one and a half foot walls to protect contain the radiation during experiments. After a visit on October 20, 1953. McCarthyism claimed that Camp Evans was a "house of spies", but none of the camp's employees which Senator McCarthy investigated in 1953 and 1954 were ever prosecuted. In 1957, replacement equipment, on the frame of a captured German Reise radar, erected at the Project Diana site helped track the Soviet Union's Sputnik (cf. the Deal Test Site in Ocean Township that moved to Evans in 1973).