SLAC probably has accumulated more high power klystron operating hours in the delivery of beams for physics research than ani other laboratory in the world. Operating data has been logged by hand, and search of this data for klystron performance statistics is time consuming. When the new 65 MW klystrons for the SLC were planned, a computer based interlock and data recording system ias implement...

As part of an international collaboration, the Stanford Linear Accelerator Center (SLAC) klystron group has designed, fabricated and tested a 60 Hz, 3 W, 150 MW klystron built for Deutsches Elektronen Synchrotron (DESY). A test diode with a 535 kV, 700 A electron beam was constructed to verify the gun operation. The first klystron was built and successfully met design specifications. This paper...

Abstract This paper has completed the simulation of X-band 1 MW klystron electronic optical system, and optimized electron gun focusing system respectively. The adopts a single beam scheme. voltage current is 80 kV 45 A respectively, perveance about 2.0 μP , average emission density cathode 6.81 / cm 2 . design electromagnetic focusing, maximum magnetic field in uniform area 0.33 T. calculation...

This paper address the reliability and availability issues to be faced in deploying and operating the klystronmodulator assemblies proposed for the Next Linear Collider (NLC). The rf power sources are a major system of the NLC and require a high uptime in order to reach the goal of 0.85 availability. Since the NLC is made up of several systems, not just klystron-modulator assemblies, the availa...

The coherent transition radiation emitted from an electron beam with higher-order spatial microbunching is analyzed. The characteristic angular and phase dependence can be used to identify the dominant bunching structure of such beams, which can be generated during the harmonic interaction in optical klystron modulators and free-electron lasers, and used as tunable sources of coherent light wit...

The amplified spontaneous-emission (ASE) regime of a free electron laser (FEL) can be used to produce coherent soft X-ray radiation in a long undulator (5 5 L -< 10 m) [1-6] . In such a regime, the initial incoherent radiation, with an optical power proportional to the number of electrons, is amplified by the electron beam itself as it traverses the interaction region subject to the combined pe...

The optical klystron enhancement to a self-amplified spontaneous emission free electron laser has been studied in theory and in simulations and has been experimentally demonstrated on a single-pass high-gain free electron laser, the FERMI FEL-1, in 2014. The main concept consists of two undulators separated by a dispersive section that converts the energy modulation induced in the first undulat...

The demand for 500 kV and 265 amperes peak to power an X-Band klystron brings up protection issues for klystron faults and the energy dumped into the arc from the modulator. This situation is made worse when more than one klystron will be driven from a single modulator, such as the existing schemes for running two and eight klystrons. High power pulsed klystrons have traditionally be powered by...