Virtual Prototype of a Dielectric Window for High-Power Microwave Tubes

A. Leggieri[1], D. Passi[1], F. di Paolo[1]
[1]Dipartimento di Ingegneria Elettronica, UniversitĂ  degli Studi di Roma Tor Vergata, Rome, Italy

This paper describes the Virtual Prototype of a Dielectric Window or High Power Microwave Vacuum Tubes and Linear Accelerators. Design formulas are provided and Computer Aided Design techniques based on COMSOL Multiphysics® software are proposed. The virtual prototype considers the Thermo-mechanical effects due to the joule effect induced by the power which crosses the DW and the Thermal contact with the Tube connected to the device. The proposed analysis involves Electromagnetic Waves, Joule Heating and Thermal Expansion and Moving Mesh interfaces. In this study, we show how to compensate the thermal induced degradation of the device performances, by exploiting the consequent Thermo - mechanical deformation of the opportunely designed device shape, which modify constructively the electromagnetic fields to re-increase performances.