Development of high power waveguide valve for BEPCⅡ-Linac

The high power waveguide valve is a major part of microwave system for BEPCⅡ-Linac. As an ultra-high vacuum RF component with functions of microwave high power transmission and vacuum sealing, it has a complicated structure and is difficult to fabricate. In summer of 2004, 16 sets of high power waveguide valves were developed successfully and installed on BEPCⅡ-Linac. Now the wave-guide valve work well at pulse peak power of 30~50 MW. This paper describes the design, mechanism, RF test and high power operating status of the wave-guide valve.