Electromagnetic characterization of coating materials in the sub-THz frequency range: a new methodology.
Passarelli A., Vaccaro V.G., Masullo M.R., Koral C., Andreone A.
VI - Fisica applicata, acceleratori e beni culturali
Aula 29C-2 - Venerdì 21 h 15:30 - 18:30
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The electromagnetic characterization of coating materials is fundamental to build a reliable impedance model of any accelerator. A reliable, handy and non-expensive measurement system to characterize the coating materials in the sub-THz frequency range has been developed and described here. The method is based on time domain measurements of the electromagnetic wave passing through a waveguide specifically designed, having a thin central slab where the coating material is deposited on both sides. Two horn antennas are integrated on both sides of the device to optimize the signal collection and detection. This novel technique is tested on slabs coated with a Non-Evaporable Getter and allows evaluating the surface impedance in the frequency range from 0.1 to 0.3 THz.