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@inproceedings{kuzikov:ipac2021-wepab164, author = {S.V. Kuzikov and S.P. Antipov and P.V. Avrakhov and E. Dosov and E.W. Knight and J.G. Power and J. Shao and Y. Zhao}, % author = {S.V. Kuzikov and S.P. Antipov and P.V. Avrakhov and E. Dosov and E.W. Knight and J.G. Power and others}, % author = {S.V. Kuzikov and others}, title = {{Electrodeless Diamond Beam Halo Monitor}}, booktitle = {Proc. IPAC'21}, pages = {2990--2993}, eid = {WEPAB164}, language = {english}, keywords = {electron, experiment, coupling, radiation, vacuum}, venue = {Campinas, SP, Brazil}, series = {International Particle Accelerator Conference}, number = {12}, publisher = {JACoW Publishing, Geneva, Switzerland}, month = {08}, year = {2021}, issn = {2673-5490}, isbn = {978-3-95450-214-1}, doi = {10.18429/JACoW-IPAC2021-WEPAB164}, url = {https://jacow.org/ipac2021/papers/wepab164.pdf}, note = {https://doi.org/10.18429/JACoW-IPAC2021-WEPAB164}, abstract = {{Beam halo measurement is important for novel x-ray free-electron lasers which have remarkably high repetition rate and average power. We propose diamond as a radiation hard material that can be used to measure the flux of passing particles based on a particle-induced conductivity effect. Our diamond electrodeless monitor is based on a microwave measurement of the change in the resonator coupling and eigenfrequency. For measurements, we put a sensitive diamond sample in a resonator that intercepts the halo. By measuring the change in RF properties of the resonator, one can infer the beam halo parameters scanning across the beam to map its transverse distribution. In recent experiments we used a Vertical Beam Test Stand (VBS), delivered DC electron beam of the 20-200 keV energy with the current up to 50 µA, to characterize several diamond samples. We have designed and fabricated a scanning diamond monitor, based on an X-band resonator, which was tested at Argonne Wakefield Accelerator (AWA) with a multi-MeV electron beam.}}, }