Abstract
Gyrotron has proven to be an efficient source for RF generation at high power and high frequency level. Gyrotron has very significant and specific role to play, particularly, in plasma, material, spectroscopy and energy research. The chapter covers the selection of dielectric materials and power handling capability of RF windows. The design analysis of RF window with window disk thickness and diameter are optimized considering the minimum return loss and the minimum insertion loss by using CST microwave studio. The advantage of the double disc window cooling is most effective. In the 42 GHz window design, double disc winnow are using and the temperature on the disc of RF window does not exceed 100 degree C and found in safe limit. The design of RF window depends on the dielectric characteristics like dielectric constant, loss tangent, permittivity, etc., of the window materials. The dielectric permittivity and loss tangent of window material affect the absorption and transmission of RF power. The thermal analyses are performed by using finite element analysis code ANSYS code on the basis of electrical design of RF window.