BAC-Klystrons: A New Generation of Klystrons in Vacuum Electronics

Abstract

Two samples of S-band BAC multiple-beam BT258 klystrons were developed, fabricated, and tested at DBT with the support of CERN. A maximum efficiency of 66% was obtained at an output level of 6.6 MW. The 60% efficiency for one of multiple beam klystrons was successively confirmed in dynamic tests at CERN. The BAC method of electron grouping is discussed and the output parameters of multiple-beam BAC-klystron are compared with the existing single-beam klystrons. The possibility of increasing the output power by the BAC method of electron grouping of S-band multiple-beam klystron at an output power level of 10 and 20 MW is discussed.