Wuppertal 2015 – wissenschaftliches Programm
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AKBP: Arbeitskreis Beschleunigerphysik
AKBP 3: RF, Resonators and Applications
AKBP 3.3: Vortrag
Montag, 9. März 2015, 17:15–17:30, BZ.08.06 (HS 1)
Performance of the RF Phase Modulation System at DELTA — •Marcel Bursy1, Jonathan Fürsch2, Peter Hartmann1, Benjamin Isbarn1, Malte Sommer1, and Thomas Weis1 — 1Center for Synchrotron Radiation (DELTA) TU Dortmund University, 44227 Dortmund, Germany — 2Affiliation changed meanwhile
At DELTA, a third generation 1.5 GeV synchrotron radiation facility, we use common schemes to damp longitudinal coupled bunch mode instabilities, including a bunch-by-bunch feedback system. We also utilize an RF-phase modulation of the master-RF at two times the synchrotron frequency, providing strong additional damping capabilities and a significant increase in beam lifetime of approximately 20%, due to bunch lengthening and reduced Touschek effect. Despite the apparent influence on beam lifetime and longitudinal beam stability the actual correlation between the phase modulation of the master-RF and its influence on the time dependent accelerating gradient has not been studied sufficiently yet. The presentation will give an overview on the existing modulation scheme together with first studies to provide a better understanding of the RF phase modulation impact on the small bandwidth accelerating cavity.