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@InProceedings{beukers:napac2019-moplo01,
author = {T.G. Beukers and J.W. Amann and Y.M. Nosochkov},
title = {{A Beam Spreader System for LCLS-II}},
booktitle = {Proc. NAPAC'19},
pages = {236--239},
paper = {MOPLO01},
language = {english},
keywords = {kicker, septum, undulator, FEL, electron},
venue = {Lansing, MI, USA},
series = {North American Particle Accelerator Conference},
number = {4},
publisher = {JACoW Publishing, Geneva, Switzerland},
month = {10},
year = {2019},
issn = {2673-7000},
isbn = {978-3-95450-223-3},
doi = {10.18429/JACoW-NAPAC2019-MOPLO01},
url = {http://jacow.org/napac2019/papers/moplo01.pdf},
note = {https://doi.org/10.18429/JACoW-NAPAC2019-MOPLO01},
abstract = {For the LCLS-II project, the SLAC National Accelerator Laboratory is installing a new superconducting RF linac capable of continuously delivering 4 GeV electron bunches spaced 1.1 microseconds apart. A spreader system is required to distribute the beam between a soft X-ray or hard X-ray undulator, and a beam dump. An additional beam diverter is required in the front end of the linac to divert 100 MeV electrons to a diagnostic line. Both the spreader and diagnostic diversion systems are designed to operate on a bunch by bunch basis via the combination of fast kickers and a Lambertson septum. This paper presents a summary of the optics, kicker, and septum design. Of specific interest is the unique challenge associated with building a high repetition, high stability, spreader capable of diverting a single bunch without disturbing neighboring bunches. Additional discussion includes the application of the spreader technology to the proposed DASEL/S30XL beamline. This beamline will acceptμbunches evenly spaced between the undulator bound bunches, thus requiring a kicker with the same repetition rate as LCLS-II but a pulse width extended to approximately 600 ns.},
}