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RIS citation export for TUPA27: Longitudinal Feedback Dynamics in Storage Rings with Small Synchrotron Tunes

TY  - CONF
AU  - Lindberg, R.R.
ED  - Biedron, Sandra
ED  - Simakov, Evgenya
ED  - Milton, Stephen
ED  - Anisimov, Petr M.
ED  - Schaa, Volker R.W.
TI  - Longitudinal Feedback Dynamics in Storage Rings with Small Synchrotron Tunes
J2  - Proc. of NAPAC2022, Albuquerque, NM, USA, 07-12 August 2022
CY  - Albuquerque, NM, USA
T2  - International Particle Accelerator Conference
T3  - 5
LA  - english
AB  - We analyze the dynamics of multibunch longitudinal instabilities including bunch-by-bunch feedback under the assumption that the synchrotron tune is small. We find that increasing the feedback response does not always guarantee stability, even in the ideal case with no noise. As an example, we show that if the growth rate of a cavity-driven mode is of the order of the synchrotron frequency, then there are parameter regions for which the instability cannot be controlled by feedback irrespective of its gain. We verify these calculations with tracking simulations relevant to the APS-U, and find that the dynamics do not depend upon whether the longitudinal feedback relies on phase-sensing or energy-sensing technology. Hence, this choice should be dictated by measurement accuracy and noise considerations.
PB  - JACoW Publishing
CP  - Geneva, Switzerland
SP  - 405
EP  - 408
KW  - feedback
KW  - HOM
KW  - simulation
KW  - synchrotron
KW  - cavity
DA  - 2022/10
PY  - 2022
SN  - 2673-7000
SN  - 978-3-95450-232-5
DO  - doi:10.18429/JACoW-NAPAC2022-TUPA27
UR  - https://jacow.org/napac2022/papers/tupa27.pdf
ER  -