Design and test of a 100 MW X-band TE01 window

Research is in progress on a TeV-scale linear collider that will operate at 5-10 times the energy of present-generation accelerators. This will require development of high power X-band sources generating 50-100 MW per source. Calabazas Creek Research, Inc. is currently developing a travelling wave window using compact, numerically optimized, parabolic tapers to match the input diameter of 38 mm to the window ceramic diameter of 76 mm. The design is projected to handle 100 MW of pulse power with a peak field at the window face of 3.6 MV/m. Cold test of the window has shown the return loss to be better than -25 dB over a 100 MHz bandwidth and resonance free. The window is scheduled for high-power testing at the SLAC.