To solve the problem of mode competition in high-order working modes, this paper presents a fast design method based on TM31-2π for dumbbell shaped extended interaction cavity. Based equivalent circuit theory, high-frequency characteristics structure are studied. In addition, we propose W-band continuous wave sheet beam klystron circuit. The was driven by 20 kV and 0.85 A electron beam, with 3....

An important contribution to the increased luminosity of the SLAC Linear Collider (SLC) in 1997/98 is due to improved performance of the linac. New tuning and stabilization strategies have reduced the emittance growth to nearly negligible values (<10% in x and <30% in y). A stronger lattice has less sensitivity to wakefields. A new orbit correction scheme and a different emittance tuning proced...

We report on experimental and theoretical investigations of a 17 GHz RF photocathode electron gun. This is the first photocathode electron gun to operate at a frequency above 2.856 GHz. The 1.5 cell, π−mode, copper cavity was tested with 50 ns pulses from a 17.150 GHz klystron amplifier built by Haimson Research Corp. A Bragg filter was used at the RF gun to reduce the reflection of parasitic m...

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...