2005
DOI: 10.1103/physrevstab.8.102801
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rf amplitude modulation to suppress longitudinal coupled bunch instabilities in the CERN Super Proton Synchrotron

Abstract: Without specific counter measures, the LHC type beam in the SPS suffers from longitudinal coupled bunch instabilities. To prevent them, the SPS impedance has been decreased over the last few years and the operation of a high frequency Landau damping system has been established. In the absence of this Landau damping system one may alternatively introduce an rf amplitude modulation to stabilize the beam. We present results obtained by this method in the SPS and considerations for a potential increase of the long… Show more

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Cited by 2 publications
(1 citation statement)
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“…This contribution presents such an example of R&D originally presented in 2016 [9]. In a synchrotron, the bunch-to-bunch energy spread of the synchrotron frequency can be increased by pure amplitude modulation [10] or with a detuned cavity [11]. Pure amplitude modulation requires a broadband cavity, while operating a detuned cavity requires sufficient motor tuning margin without changing the infrastructure.…”
Section: Introductionmentioning
confidence: 99%
“…This contribution presents such an example of R&D originally presented in 2016 [9]. In a synchrotron, the bunch-to-bunch energy spread of the synchrotron frequency can be increased by pure amplitude modulation [10] or with a detuned cavity [11]. Pure amplitude modulation requires a broadband cavity, while operating a detuned cavity requires sufficient motor tuning margin without changing the infrastructure.…”
Section: Introductionmentioning
confidence: 99%