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@inproceedings{wei:ipac2021-mopab142,
author = {Y. Wei and H. Bursali and N. Catalán Lasheras and B.T. Freemire and S. Gonzalez Anton and A. Grudiev and C.-J. Jing and J. Sauza-Bedolla and R. Wegner and C.P. Welsch},
% author = {Y. Wei and H. Bursali and N. Catalán Lasheras and B.T. Freemire and S. Gonzalez Anton and A. Grudiev and others},
% author = {Y. Wei and others},
title = {{A Compact, Low-Field, Broadband Matching Section for Externally-Powered X-Band Dielectric-Loaded Accelerating Structures}},
booktitle = {Proc. IPAC'21},
pages = {495--498},
eid = {MOPAB142},
language = {english},
keywords = {vacuum, coupling, GUI, simulation, linac},
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-MOPAB142},
url = {https://jacow.org/ipac2021/papers/mopab142.pdf},
note = {https://doi.org/10.18429/JACoW-IPAC2021-MOPAB142},
abstract = {{It has been technically challenging to efficiently couple external radiofrequency (RF) power to cylindrical dielectric-loaded accelerating (DLA) structures. This is especially true when the DLA structure has a high dielectric constant. This contribution presents a novel design of a matching section for coupling the RF power from a circular waveguide to an X-band DLA structure with a dielectric constant ε_{r}=16.66 and a loss tangent \tanθ = 3.43× 10⁻⁵. It consists of a very compact dielectric disk with a width of 2.035 mm and a tilt angle of 60 degrees, resulting in a broadband coupling at a low RF field which has the potential to survive in the high-power environment. To prevent a sharp dielectric corner break, a 45-degree chamfer is added. Moreover, a microscale vacuum gap, caused by metallic clamping between the thin coating and the outer thick copper jacket, is studied in detail. Based on simulation studies, a prototype of the DLA structure with the matching sections was fabricated. Results from preliminary bench measurements and their comparison with design values will also be discussed.}},
}