D2. State-of-the-Art Long-Range Alpha Radiation Detector. Alpha radiation is notoriously difficult to detect even within inches of the source. This machine, developed in the 1990's, represents a breakthrough in alpha radiation monitoring. It was invented at the Los Alamos nuclear weapons laboratory. It can register trace ions formed in air by alpha particles at a distance of several meters. It cannot, however, detect alpha radiation inside the human body. Los Alamos, New Mexico. 24 February 1994.
These photographs by Robert Del Tredici are protected by copyright and are available for purchase as high-quality digital prints on archival paper or as silver gelatin prints from bdeltredici@hotmail.com.