Darmstadt 2016 – scientific programme

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AKBP: Arbeitskreis Beschleunigerphysik

AKBP 10: Beam Dynamics / Simulation II

AKBP 10.8: Talk

Wednesday, March 16, 2016, 18:15–18:30, S1/05 122

Transverse decoherence with space charge — •Ivan Karpov¹, Vladimir Kornilov², and Oliver Boine-Frankenheim^1,2 — ¹TEMF, TU Darmstadt, Schloßgartenstraße 8, 64289 Darmstadt, Germany — ²GSI, Planckstr. 1, 64291 Darmstadt, Germany

After a transverse offset the amplitude of beam centroid oscillations decays due to the spread of individual particle frequencies. Decoherence of low intensity coasting beams can be described as the pulse response. However in heavy ion and proton beams, like in SIS100 synchrotron of the FAIR project, transverse space charge strongly modify this process. We present a model that explains the first stage of decoherence process in high intensity bunched beams. It uses the modified beam transfer function with space charge and image charges to calculate the pulse response. The model agrees with particle tracking simulations and measurements at the SIS18 synchrotron at GSI Darmstadt. The applicability region of the model was obtained.