200 MW L-Band Annular Beam Klystron for Accelerators

Efficient, cost effective high power high frequency drivers are required for advanced accelerators. To address this need, this project will develop a 200 MW, 1.3 GHz Annular Beam Klystron (ABK) that will operate at a lower voltage than conventional klystrons. In Phase I, a preliminary design was developed, with detailed simulations of all critical components. All design goals were shown to be feasible: efficiency over 40%, power exceeding 200 MW, and a perveance of 3 microperv. In Phase II, the design will be refined, detailed mechanical drawings will be prepared, and the annular beam klystron will be fabricated and tested. Commercial Applications and other Benefits as described by the awardee: The ABK would allow significantly lower voltages to be used, compared to conventional klystrons, reducing the cost of the system. Also, compared to other advanced source concepts, the ABK would be mechanically much simpler than a multiple beam klystron, and would have a lower risk than a sheet beam klystron