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{mcgee:linac2022-th1aa02,
author = {K.E. McGee and K. Elliott and G.V. Eremeev and F. Furuta and A. Ganshyn and B.M. Guilfoyle and W. Hartung and M.P. Kelly and S.H. Kim and M. Martinello and O.S. Melnychuk and A.V. Netepenko and P.N. Ostroumov and J.T. Popielarski and L. Popielarski and T. Reid and A. Taylor and T. Xu},
% author = {K.E. McGee and K. Elliott and G.V. Eremeev and F. Furuta and A. Ganshyn and B.M. Guilfoyle and others},
% author = {K.E. McGee and others},
title = {{Developments Towards FRIB Upgrade to 400 MeV/u for Heaviest Uranium Ions}},
booktitle = {Proc. LINAC'22},
% booktitle = {Proc. 31st International Linear Accelerator Conference (LINAC'22)},
pages = {653--656},
eid = {TH1AA02},
language = {english},
keywords = {cavity, background, cryomodule, ECR, linac},
venue = {Liverpool, UK},
series = {International Linear Accelerator Conference},
number = {31},
publisher = {JACoW Publishing, Geneva, Switzerland},
month = {09},
year = {2022},
issn = {2226-0366},
isbn = {978-3-95450-215-8},
doi = {10.18429/JACoW-LINAC2022-TH1AA02},
url = {https://jacow.org/linac2022/papers/th1aa02.pdf},
abstract = {{High-Q₀ medium-velocity (beta opt = 0.6) 5-cell elliptical cavities for superconducting linacs are critical technology for advancing current and future projects such as the Proton Improvement Plan II linac and the proposed energy upgrade of Michigan State University’s Facility For Rare Isotope Beams linac, FRIB400. Previous work established the validity of the novel geometry of the FRIB400 prototype 644 MHz 5-cell elliptical β = 0.65 cavities for future high Q₀ development. In collaboration with FNAL, two leading-edge high-Q₀ recipes, N-doping and Mid-T baking, were tested in the 5-cell format. 2/0 N-doping + cold electropolishing was successful at achieving FRIB400 and PIP-II Q₀ requirements, achieving an unprecedented 3.8 x 10¹⁰ at 17.5 MV/m, satisfying the FRIB400 Q₀ requirements by 1.75 times in a low-gauss environment. Mid-T baking exceeded FRIB400 Q₀ requirements by 1.4 times, and benefitted from decreased residual resistance compared to the N-doped cavity test. Systematic ultrasonic thickness measurements in single-cell revealed bulk (150 microns) EP with the modified EP tool is consistent across the inner surfaces of the cavity walls.}},
}