Design of 135 MW X-band relativistic klystron for linear collider

It has been reported at EPAC-96 Conference on successful experimental results on achievement of 100 MW output RF power in a wide aperture, 15 mm, high gain, 80 dB, 14 GHz VLEPP klystron with distributed suppression of parasitic oscillations. This report presents design of an electrodynamic structure of the X-band klystron for a linear collider with a higher efficiency up to 54% to be achieved at the same parameters of the electron beam (U=1 MeV, I=250 A, emittance 0.05 /spl pi/ cm/spl middot/rad). Design RF output power of the klystron is equal to 135 MW.