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@inproceedings{kuzikov:napac2022-thxd6, author = {S.V. Kuzikov}, title = {{A Quasi-Optical Beam Position Monitor}}, & booktitle = {Proc. NAPAC'22}, booktitle = {Proc. 5th Int. Particle Accel. Conf. (NAPAC'22)}, pages = {846--849}, eid = {THXD6}, language = {english}, keywords = {coupling, electron, site, photon, cavity}, venue = {Albuquerque, NM, USA}, series = {International Particle Accelerator Conference}, number = {5}, publisher = {JACoW Publishing, Geneva, Switzerland}, month = {10}, year = {2022}, issn = {2673-7000}, isbn = {978-3-95450-232-5}, doi = {10.18429/JACoW-NAPAC2022-THXD6}, url = {https://jacow.org/napac2022/papers/thxd6.pdf}, abstract = {{There is a strong demand for non-destructive electron Beam Position Monitors (BPMs) for non-perturbative diagnostics of the electron beam position. Challenges are related to the shortness of the electron beam and the noisy chamber environment that are typical for modern RF-driven and plasma-driven accelerators. We propose using a pair of identical high-quality quasi-optical resonators attached to opposite sides of the beam pipe. The resonators can introduce Photonic Band Gap (BPM) structures. These open resonators sustain very low numbers of high-quality modes. We intend to operate at the lowest mode among the others that are capable of being excited by the bunches. The mentioned mode has a coupling coefficient with the beam that depends on the distance between the bunch and the coupling hole. The lower this distance, the higher the coupling. Therefore, comparing the pick-up signals of both resonators with an oscilloscope, we can determine the beam position.}}, }