ABSTRACT
This Summer School treats a wide range of high-power microwave tubes, covering the generation of electromagnetic radiation from sub-millimetre to tens of centimetre wavelengths. At the highest frequency are free electron lasers (FELs) and fast-wave devices such as gyrotrons and cyclotron autoresonant masers (CARMs). As wavelengths increase, a variety of devices—Cerenkov masers, backward wave oscillators (BWOs)), travelling wave tubes (TWTs), vircators, klystrons, magnetrons, etc—find favour. The design choices for these tubes depend on many factors, such as frequency, power, pulse length, tunability, mode purity, rep-rating, ruggedness and so forth (Granatstein and Alexeff 1987, Benford and Swegle 1992).
