Multiphysics Design of a 130 GHz Klystron

The Multiphysics analysis of a 130 GHz klystron is described in this paper. Critical quantities are exposed to multiple physics effects acting on narrow dimensions modified by power dissipations. The proposed device uses an integrated injection/bunching section described in last COMSOL conference appointment. In order to stabilize electromagnetic beahvior in thermo-mechanical operative conditions, the system is based on carbon nanotube cold cathode and use an opportune airflow. Frequency shift in operative condition is reduced by means of an anisotropic thermal expansion that compensates cavity radius dilation induced by heating phenomena. The multiphysics design, performed on COMSOL, ensures the desired behavior in operative conditions.