The temperature function of the anisotropic permittivity of sapphire

A. Ibarra

doi:10.1117/12.2297937

1 October 1991 The temperature function of the anisotropic permittivity of sapphire

A. Ibarra

Proceedings Volume 1576, 16th International Conference on Infrared and Millimeter Waves; 157668 (1991) https://doi.org/10.1117/12.2297937
Event: 16th International Conference on Infrared and Millimeter Waves, 1991, Lausanne, Switzerland

Abstract

The design of millimeter (mm)-wave windows for high power gyrotrons must provide a minimization of the reflected power in order to assure an efficient operation of the tube. This aspect is usually accounted for in single disc or double disc structures by choosing the geometry in such a way that the reflected beams arising from the multiple reflections can interfere destructively. As the electrical length of the disc is determined by its permittivity, a good knowledge of this material parameter is indispensable for this concept. Due to the dielectric power absorption, a temperature profile will develop and thus the temperature function of the permittivity is required for modelling the window performance.

Citation Download Citation

A. Ibarra "The temperature function of the anisotropic permittivity of sapphire", Proc. SPIE 1576, 16th International Conference on Infrared and Millimeter Waves, 157668 (1 October 1991); https://doi.org/10.1117/12.2297937

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