Argonne National Laboratory

Argonne National Laboratory

Argonne National Laboratory
Zero Gradient Synchrotron 7
II: Buildings and Grounds
Final assembly of the 110-foot, 50 MeV linear accelerator (linac), the second stage of the injector system of the Zero Gradient Synchrotron. Protons are accelerated from left to right through 124 copper drift tubes with gaps in between inside a 34-inch vacuum cavity. The linac is a single resonant cavity powered by a large radio-frequency power supply, similar to a radar transmitter, capable of providing 5 million watt peak power. The electric field that accelerates the protons alternates the positive to negative at 200 megacycles per second. The protons pass through the drift tubes at precisely the time when this field is in the wrong direction for acceleration and emerge when the field is in the direction that will accelerate them. In the photograph the first six drift tubes can be seen at the opening of the linac. The design of both the Cockcroft-Walton generator and the linac is similar to that of the Brookhaven Alternating Gradient Synchrotron (AGS) system.
Zero gradient synchrotrons | Particle accelerators | Nuclear physics--Instruments | Particles (Nuclear physics)
Argonne National Laboratory
Photographic prints; 20.8 x 26.8 cm
9700 S. Cass Avenue | Argonne, Illinois
Archival Photographic Files
University of Chicago Library, Special Collections Research Center

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