Naval Research Laboratory cyclotron

Naval Research Laboratory cyclotron

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Credit: Naval Research Laboratory, courtesy EMILIO SEGRE VISUAL ARCHIVES, Physics Today Collection/AMERICAN INSTITUTE OF PHYSICS/SCIENCE PHOTO LIBRARY

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Caption: Naval Research Laboratory cyclotron. Researcher at the open 60-ton radiation shielding door guarding the entrance to the cyclotron vault at the Naval Research Laboratory (NRL), Washington DC, USA. This 76-inch sector-focused cyclotron (a particle accelerator) was built at the NRL site in the 1960s. Research carried out here in the 1970s included accelerating particles to produce neutron beams for use in medical therapies. The sign above the door indicates when the magnet is switched on. The heavy shielding and weight of the door is designed to prevent hazardous leakage of high-energy and potentially fatal radiation from the cyclotron.

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