On some practical consideration of the electron beam breakup transit time oscillator

The electron beam breakup transit time oscillator (BTO) makes use of the interaction between an electron beam and the azimuthally asymmetric transverse magnetic mode (TM110) of a cavity to facilitate the exchange of energy between them. Linear theory has shown a large growth rate in the regime where space-charge effects can be ignored. In this study, we have investigated the non-ideal elements in the BTO and evaluated their effects accordingly. The practical issues under consideration are electron beam quality, energy, and space-charge potential. Our calculations indicate only a modest unfavorable scalings with respect to these parameters.