Abstract
The rf system for the National Bureau of Standards (NBS)/Los Alamos cw racetrack microtron is described. The low-power portion consists of five 75-W amplifiers that drive two input ports in each of two chopper deflection cavities and one port in the prebuncher cavity. A single 500-kW klystron drives four separate 2380-MHz cavity sections: the two main accelerator sections, a capture section, and a preaccelerator section. The phases and amplitudes in all cavities are controlled by electronic or electromechanical controls. The 1-MW klystron power supply and crowbar system were purchased as a unit; several modifications are described that improve power-supply performance. The entire rf system has been tested and shipped to the NBS, and the chopper-buncher system has been operated with beam at the NBS.
Highlights
Menddwr, or favtdng by IK UrrilwJ EMa
The ?-MW klystron power supply and crowbar system were purchased as a unll: several mod iflcat ions are described that improve power supply performance
The erllre rl system up crates at 23E0 MHz and normdlly i> op~rdt~d c. , how ever, a pulser may be used In the high power sy$tem lo pulse the klystron drive for rondtt\ontng and lun~ UD
Summary
The rf system for the National Bureau of Sian dards The entire rf sy’,tem has been te~led and shipped to the NBS, and the chopper -buncher system has oeen operated with beam at the NBS. How ever , a pulser may be used In the high power sy$tem lo pulse the klystron drive for rondtt\ontng and lun~ UD of the accelerator. The low level rf sys[cm, lhe phase and amplltude controls are all electronic, lh:~h:P~wer —.- rf ~5tem_ ——. The high power rf system consl>ts cf a singl, 500 kW cw klystron that drives four separa:? The power i~ distributed through WR 4J0 wavegulde that is water cooled for phase stabillty and for keeping thp temperature a saf~ level>. Tron ha,, a 57 dB gain; thu$, it take> only 1 h t[)sat urate, 7hc kly~tron hds been shipped to NBs and ha’, bern operated to 740 kW
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