Emilio Segrè Visual Archives

More than 30,000 photos of scientists and their work

Lawrence Berkeley National Laboratory F37

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Lawrence Berkeley National Laboratory F37

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Image title: 
The 88-inch spiral ridge cyclotron at Lawrence Radiation Laboratory
Credit line: 
Lawrence Berkeley National Laboratory, courtesy of AIP Emilio Segrè Visual Archives

The 88-inch spiral ridge cyclotron, constructed with Atomic Energy Commission (AEC) funds as part of the fundamental research program at the University of California's Lawrence Radiation Laboratory, Berkeley (currently known as the Lawrence Berkeley National Laboratory). The design of the cyclotron gives it a beam with higher intensity and flexibility that other types of cyclotrons. The energy of the beams can be varied up to a maximum of 60 Mev for protons, 60 Mev for deuterons and 120 Mev for alpha particles. The instrument will allow scientists to work in previously inaccessible intermediate energy ranges, permitting new experiments on the atomic nucleus. The white, circular objects at left are copper coils of the 300-ton electromagnet. Between the coils is the accelerating chamber. At right, open doors shows the inductive portion of the radiofrequency resonator; it determines the frequency of the oscillator. By tuning the r.f. frequency, and the magnetic field, the cyclotron beam can be adjusted through a wide range of energies.

Photo date: 
circa 1962
Original format: 
1 photographic print (black and white; 10 x 8 inches)
Lawrence Berkeley National Laboratory