Karlsruhe 2011 – wissenschaftliches Programm
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T: Fachverband Teilchenphysik
T 85: Strahldynamik, Simulation und Polarisation
T 85.8: Vortrag
Mittwoch, 30. März 2011, 18:30–18:45, 30.22: 022
Simulation of Electron Cloud Effects to Heavy Ion Beams — •Fatih Yaman, Erion Gjonaj, and Thomas Weiland — Technische Universität Darmstadt, Institut für Theorie Elektromagnetischer Felder Schlossgartenstrasse 8, 64289 Darmstadt, Germany
Electron cloud (EC) driven instability can cause beam loss, emittance growth, trajectory change and wake fields. Mentioned crucial effects of EC motivated researchers to understand the EC build up mechanism and the effects of EC to the beam. This motivation also induced the progress of developing new simulation codes. EC simulations can roughly be divided into two classes such as, softwares whose goals are to simulate the build up of the EC during the passage of a bunch train and the codes which model the interaction of a bunch with an EC.
The aim of this study is to simulate the effects of electron cloud (EC) on the dynamics of heavy ion beams which are used in heavy ion synchrotron (SIS-18) at GSI. To do this, a 3-D and self-consistent simulation program based on particle in cell (PIC) method is used. In the PIC cycle, accurate solution of the Maxwell equations is obtained by employing discontinuous Galerkin finite element method. As a model, we assumed a perfectly conducting beam pipe which was uniformly (or randomly) loaded with the electrons. Then as parallel with the realistic cases in SIS-18, a single bunch consisting of U+73 ions was extracted which could propagate in this pipe. Due to EC-ion bunch interaction, electrons gained energy and their displacements were observed. Electric and magnetic field components and EC charge density were calculated, numerically.