100 MW klystron development at SLAC

A klystron designed to operate at 11.4 GHz and 440 kV is presently Stanford Linear Accelerator Center's (SLAC's) strongest RF power source candidate for the Next Linear Collider. It is expected to provide 100 MW of RF power with a pulse width of 1 mu s. The authors describe progress in the development of this device including results from single- and double-gap output cavities and various styles of RF output windows. The design parameters for this klystron are shown. Three X-band klystrons have been designed to test various alternatives to RF windows, output cavities, and beam optics. At this time 72-MW RF power has been generated with a pulse width of 100 ns and 35 MW has been generated at 800 ns.< >