Dresden 2013 – wissenschaftliches Programm
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T: Fachverband Teilchenphysik
T 120: Beschleunigerphysik VII (Strahldynamik/Simulation)
T 120.1: Vortrag
Dienstag, 5. März 2013, 16:45–17:00, WIL-C203
Understanding transverse tune spectrum for high intensity ions beams at GSI SIS-18 — •Rahul Singh1,2, Peter Forck1, Piotr Kowina1, Oliver Boine-Frankenheim1,2, Wolfgang Kaufmann1, Kevin Lang1, Rainer Haseitl1, and Thomas Weiland2 — 1GSI, Darmstadt, Germany — 2TEMF, TU Darmstadt, Germany
Several experiments involving transverse tune spectra measurements were performed at GSI SIS-18 with various beam intensities to understand the effect of intensity on tune spectra. Besides the machine tune, the spectra provides information about the intensity dependent coherent and the incoherent space charge tune shift. The space charge tune shift is measured from a fit of the observed shifted positions of the measured head tail modes to the predictions of an analytic model. Additionally, each mode is temporally identified by using a novel excitation mechanism and fast sampling ADCs. The longitudinal structure of each head tail mode gives a direct measurement of chromaticity.