In a way, the principle was similar to that of the cyclotron, except that instead of spinning ions around in a circle to increase their velocity a beam of coherent light was circulated to increase its intensity.
"The Foreign Hand Tie"
Gordon Randall Garrett
Construction on the cyclotron was therefore halted.
"LRL Accelerators The 184-Inch Synchrocyclotron"
Lawrence Radiation Laboratory
Finally they strike a target inserted into their path or are extracted from the cyclotron for use as an external beam.
"LRL Accelerators The 184-Inch Synchrocyclotron"
Lawrence Radiation Laboratory