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@inproceedings{lumpkin:ipac2021-tupab273,
author = {A.H. Lumpkin and J.A. Diaz Cruz and A.L. Edelen and D.R. Edstrom and B.T. Jacobson and P.S. Prieto and J. Ruan and R.M. Thurman-Keup and F. Zhou},
% author = {A.H. Lumpkin and J.A. Diaz Cruz and A.L. Edelen and D.R. Edstrom and B.T. Jacobson and P.S. Prieto and others},
% author = {A.H. Lumpkin and others},
title = {{Observations on Submicropulse Electron-Beam Effects From Short-Range Wakefields in Tesla-Type Superconducting Rf Cavities}},
booktitle = {Proc. IPAC'21},
pages = {2105--2108},
eid = {TUPAB273},
language = {english},
keywords = {cavity, electron, wakefield, laser, HOM},
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-TUPAB273},
url = {https://jacow.org/ipac2021/papers/tupab273.pdf},
note = {https://doi.org/10.18429/JACoW-IPAC2021-TUPAB273},
abstract = {{In previous experiments at the Fermilab Accelerator Science and Technology (FAST) facility, the effects of higher-order modes (HOMs) in TESLA-type cavities on submacropulse centroid motion were elucidated*. We now have extended our investigations to short-range wakefields (SRWs) in these cavities. The latter result in submicropulse effects where the transverse wakefields cause head-tail centroid shifts. We used a Hamamatsu C5680 UV-visible synchroscan streak camera to synchronously sum the OTR from each of the 50 micropulses in the macropulse. We generated the y-t effect in the 41-MeV beam by purposely steering the beam off axis in y at the entrance of the first capture cavity. The head-tail transverse kicks within the 11-ps-long micropulses of 500 pC each were observed at the 100-micron level for steering off-axis in one cavity and several 100 microns for two cavities. These SRW results will be compared to simulations from the ASTRA model of a single micropulse in FAST. Since the SRW kicks go inversely with energy, these emittance-dilution effects are particularly relevant to the LCLS-II injector commissioning plans where <1 MeV beam will be injected into a TESLA-type cryomodule.}},
}