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@inproceedings{geng:ipac2021-tupab342,
author = {R.L. Geng and S.A. Belomestnykh and W.A. Clemens and Y. Fuwa and H. Hayano and Y. Iwashita and Z. Li and V.D. Shemelin and R.S. Williams},
% author = {R.L. Geng and S.A. Belomestnykh and W.A. Clemens and Y. Fuwa and H. Hayano and Y. Iwashita and others},
% author = {R.L. Geng and others},
title = {{Preliminary Cryogenic Cold Test Results of the First 9-Cell LSF Shape Cavity}},
booktitle = {Proc. IPAC'21},
pages = {2296--2299},
eid = {TUPAB342},
language = {english},
keywords = {cavity, niobium, SRF, multipactoring, laser},
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-TUPAB342},
url = {https://jacow.org/ipac2021/papers/tupab342.pdf},
note = {https://doi.org/10.18429/JACoW-IPAC2021-TUPAB342},
abstract = {{Following successful prototyping and testing of single- & 5-cell LSF shape cavities *, **, the first 9-cell LSF shape cavity LSF9-1 was successfully constructed using an innovative process at JLab with the in-house facilities. The cavity was then shipped to KEK for post-fabrication mechanical adjustment and ILC TDR style treatment and surface processing. Cold testing was carried out at the JLab VTA facility, instrumented with a suite of Kyoto instruments. Favorable values for the bath pressure detuning sensitivity and Lorentz force detuning coefficient were experimentally measured, validating the design improvement in cell stiffeners. Pass-band measurements indicate 4 out of 9 cells reaching gradient capability of > 45 MV/m, including 2 cells reaching 51 MV/m. Cornell OST detectors identified the cell and location responsible for the current hard quench limit. Multipacting-like barriers observed in end cells are investigated both analytically and numerically. The cavity was shipped to FNAL and received a light EP at the joint ANL/FNAL facility for further cold testing at Jlab. Two new 9-cell LSF cavities are being constructed including one made of large-grain niobium material.}},
}