Göttingen 2012 – scientific programme

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T: Fachverband Teilchenphysik

T 86: Beschleunigerphysik 8

T 86.7: Talk

Thursday, March 1, 2012, 18:20–18:35, VG 1.104

Electron Cloud induced Single Bunch Instability, Simulation by Tracking with a Pre-computed Wake Matrix — •Aleksandar Markovik and Ursula van Rienen — Fakultät für Informatik und Elektrotechnik, Albert-Einstein-Str.2 D-18059 Rostock

A PIC simulation of the interaction of a positron beam with an e-cloud yields the wake kick from the electrons on the tail particles of the bunch. Thereby a certain offset in the transverse centroid position of the bunch perturbs the electron distribution which than exercise a transverse kick on the following bunch particles. By slicing the bunch in axial direction and computing the wake kick from the e-cloud due to the vertical offset of each slice we receive a triangular wake matrix. With such a pre-computed wake matrix, for a certain e-cloud density, we investigate the stability of a single bunch by tracking it through the linear optics of the storage ring while at each turn applying the kick from the e-cloud.