Computational model of a buncher cavity for millimetric klystron

A computational model of a Buncher cavity for millimetric klystron following a Multiphysics approach is proposed in this paper. In the range of these narrow dimensions, device is critically exposed to multiple physics effects, due to the power dissipations and external environment. The electromagnetic performances are affected by these factors. The proposed device is integrated with a carbon nanotube cold cathode in order to reduce thermal expansion and cooled by an opportune airflow that regulates the temperature distribution to compensate the resonant frequency shift. Electromagnetic fields and scattering parameters have been computed in operative conditions suggesting the appropriate materials and geometrical shapes