3D simulation studies of transverse coherent instabilities in long bunches with space charge

Author

Boine-Frankenheim, O. ; Kornilov, V.

Author_Institution

GSI, Darmstadt

fYear

2007

fDate

25-29 June 2007

Firstpage

3919

Lastpage

3921

Abstract

3D simulation studies of the transverse impedance budget for long bunches in the FAIR synchrotrons have been started. Important transverse instability driving sources are the thin resistive wall and the kicker impedances. The major concerns are the required low momentum spreads and the additional loss of Landau damping due to the transverse space charge tune shift. The simulation code PATRIC has been extended in order to predict coherent instability thresholds with space charge and for broadband impedance sources. Simulation scans were performed to analyze the improvement of transverse stability in long bunches relative to a coasting beam.

Keywords

particle beam bunching; particle beam stability; physics computing; space charge; synchrotrons; FAIR synchrotrons; Landau damping; PATRIC; beam bunches; kicker impedances; simulation code PATRIC; thin resistive walls; transverse instability driving sources; transverse space charge tune shift; Damping; Frequency; Impedance; Magnets; Predictive models; Space charge; Stability; Steel; Structural beams; Synchrotrons;

fLanguage

English

Publisher

ieee

Conference_Titel

Particle Accelerator Conference, 2007. PAC. IEEE

Conference_Location

Albuquerque, NM

Print_ISBN

978-1-4244-0916-7

Type

conf

DOI

10.1109/PAC.2007.4439934

Filename

4439934