Dielectric Loaded THz Waveguide Experimentally Optimized by Dispersion Measurements

Proceedings of the 13th International Particle Accelerator Conference, IPAC2022, Bangkok, Thailand 13th International Particle Accelerator Conference, IPAC'22, Bangkok, Thailand, 12 Jun 2022 - 17 Jun 2022; [Geneva] : JACoW Publishing, Geneva, Switzerland 1526-1529 (2022). doi:10.18429/JACoW-IPAC2022-TUPOMS044
Emerging high power THz sources pave the road for THz-driven acceleration of ultra-short bunches, and enable theirmanipulation for diagnostic purposes. Due to the smallfeature sizes of THz-guiding devices new methods are nec-essary for their electromagnetic characterization. A newtechnique has recently been developed which characterizesTHz waveguides with respect to their dispersion relationsand attenuation. Here, the method is applied to circularwaveguides, partially filled with polymer capillaries of dif-ferent thicknesses, to find a suitable size for THz drivenstreaking at 287 GHz. Further, rough 3d-printed metallicwaveguides are measured to study the effect of roughnesson attenuation and phase constant. In general, additive man-ufacturing techniques show promise for advanced integrateddesigns of THz driven structures.
Published by JACoW Publishing, Geneva, Switzerland, [Geneva]