JACoW is a publisher in Geneva, Switzerland that publishes the proceedings of accelerator conferences held around the world by an international collaboration of editors.
@inproceedings{xu:srf2023-wepwb089,
author = {W. Xu and Z.A. Conway and E.F. Daly and J. Guo and R.A. Rimmer and K.S. Smith and A. Zaltsman},
% author = {W. Xu and Z.A. Conway and E.F. Daly and J. Guo and R.A. Rimmer and K.S. Smith and others},
% author = {W. Xu and others},
title = {{Theoretical Model of External Q Tuning for an SRF Cavity with Waveguide Tuner}},
% booktitle = {Proc. SRF'23},
booktitle = {Proc. 21th Int. Conf. RF Supercond. (SRF'23)},
pages = {794--796},
eid = {WEPWB089},
language = {english},
keywords = {cavity, GUI, SRF, operation, electron},
venue = {Grand Rapids, MI, USA},
series = {International Conference on RF Superconductivity},
number = {21},
publisher = {JACoW Publishing, Geneva, Switzerland},
month = {09},
year = {2023},
issn = {2673-5504},
isbn = {978-3-95450-234-9},
doi = {10.18429/JACoW-SRF2023-WEPWB089},
url = {https://jacow.org/srf2023/papers/wepwb089.pdf},
abstract = {{A wide range of electron beam energies (5 ¿ 18 GeV) and beam currents (0.2 ¿ 2.5 A) in EIC Electron Storage Ring (ESR) operating scenarios requires a capability of adjusting coupling factor up to a factor of 20 for the 591 MHz Superconducting Radio Frequency (SRF) cavities, which contains two fundamental power couplers (FPC) delivering continuous wave (CW) 800 kW RF power to the beam. Currently, adjusting external Q of a SRF cavity is done by varying protrusion of FPC¿s inner conductor in beam pipe or using three stub tuner to adjust external Q value, which either has limit on tuning range or limit on operating power. This paper presents a method of tuning the FPC external Q by a multiple-waveguide tuner, which allows for high power, wide tuning range operations. The theoretical model of matching beam impedance with waveguide tuner and detailed matching conditions and limits will be presented. Follow the theoretical model, a preliminary design of a 3D waveguide tuner will be presented.}},
}