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{nantista:ibic2022-tup11,
author = {C.D. Nantista and A.A. Haase and P. Krejcik},
title = {{A Cryogenic RF Cavity BPM for the Superconducting Undulator at LCLS}},
& booktitle = {Proc. IBIC'22},
booktitle = {Proc. 11th Int. Beam Instrum. Conf. (IBIC'22)},
pages = {241--244},
eid = {TUP11},
language = {english},
keywords = {cavity, dipole, coupling, cryogenics, GUI},
venue = {Kraków, Poland},
series = {International Beam Instrumentation Conference},
number = {11},
publisher = {JACoW Publishing, Geneva, Switzerland},
month = {12},
year = {2022},
issn = {2673-5350},
isbn = {978-3-95450-241-7},
doi = {10.18429/JACoW-IBIC2022-TUP11},
url = {https://jacow.org/ibic2022/papers/tup11.pdf},
abstract = {{The new superconducting undulator beamline at LCLS requires the BPMs to be operated at cryogenic temperatures alongside the undulator magnets. They are used for beam-based alignment of the undulator magnets and quadrupole and require submicron resolution to achieve good FEL performance. This is to be achieved with X-band RF cavity BPMs, as is done now on the permanent undulator beamline. However, operating the cavities at cryogenic temperatures introduces significant challenges. We review the changes in RF properties of the cavities that result from cooling and how the design is changed to compensate for this. This includes a novel approach for employing a rectangular cavity with split modes to separately measure the X and Y position without coupling.}},
}