Darmstadt 2016 – wissenschaftliches Programm

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AKBP: Arbeitskreis Beschleunigerphysik

AKBP 7: Beam and Accelerator Control II

AKBP 7.5: Vortrag

Dienstag, 15. März 2016, 17:30–17:45, S1/05 23

Interaction of RF Phase Modulation and Coupled Bunch Instabilities at the DELTA Storage Ring* — •Malte Sommer, Benjamin Isbarn, Bernard Riemann, and Thomas Weis — TU Dortmund University (DELTA) Center for Synchrotron Radiation Maria-Goeppert-Mayer-Str. 2 D - 44221 Dortmund

In 2011, a bunch-by-bunch feedback system has been installed at the DELTA storage ring and is mainly used for diagnostic purposes. In standard user operation, longitudinal coupled bunch instabilities are suppressed by RF phase modulation, which also increases the beam lifetime. The additional stabilisation is induced by a nonlinear spread of the synchrotron frequency due to Landau damping. To analyze the influence of RF phase modulation on coupled bunch instabilities, the bunch-by-bunch feedback system is used to achieve a deeper understanding of the interaction between both effects. The stabilisation has been investigated in more detail by elaborated excite-damp techniques. This talk will present recent results obtained at the DELTA storage ring.

*Work supported by the BMBF under contract no. 05K13PEB.