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@InProceedings{lindberg:napac2019-moplm08,
author = {R.R. Lindberg},
title = {{Controlling Transient Collective Instabilities During Swap-Out Injection}},
booktitle = {Proc. NAPAC'19},
pages = {110--112},
paper = {MOPLM08},
language = {english},
keywords = {lattice, injection, octupole, emittance, simulation},
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-MOPLM08},
url = {http://jacow.org/napac2019/papers/moplm08.pdf},
note = {https://doi.org/10.18429/JACoW-NAPAC2019-MOPLM08},
abstract = {Previous work has shown that collective instabilities at injection may reduce injection efficiency even for on-axis injection as planned for the APS-Upgrade*. Stability at injection is governed by a number of factors, including phase-space mismatch between injected and stored bunch, strength of the impedance, degree of nonlinearities, and feedback. We find that the large tune-shift with amplitude of the most recent APS-U lattice largely tames the transient instability via Landau damping, and show that using octupoles to increase the nonlinear tune shift can stabilize the transient instability at injection that plagued a previously unstable lattice.},
}