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AKBP: Arbeitskreis Beschleunigerphysik

AKBP 10: Beam Dynamics / Simulation II

AKBP 10.2: Vortrag

Mittwoch, 16. März 2016, 16:45–17:00, S1/05 122

Simulation Studies on Measures to Mitigate Ion Clouds — Prasanth Babu Ganta¹, Ahmed Masood¹, Dennis Sauerland², Wolfgang Hillert², Atoosa Meseck³, and •Ursula van Rienen¹ — ¹Universität Rostock, Institut für Allgemeine Elektrotechnik, Albert-Einstein-Str. 2, 18059 Rostock — ²Physikalisches Institut der Universität Bonn, ELSA, Nussallee 12, 53115 Bonn — ³HZB, Institut Beschleunigerphysik, Albert-Einstein-Str. 15, 12489 Berlin

For future Energy Recovery Linacs (ERL), parasitic ions, which are generated by collisions of the beam and the rest gas in the vacuum chamber, present a limiting factor for the high current-low emittance electron beams. Clearing gaps, clearing electrodes and appropriate filling patterns are a remedy to keep the ion density in the accelerator at a level that allows for a minimum stability of the beam parameters. The MOEVE PIC Tracking code, which employs a 2D wake matrix, enables tracking simulations of the ion distribution over a relatively long period of up to thousands of interactions with the passing bunches. It enables to develop a deeper understanding of the ion-cloud behavior in order to design appropriate measures for their mitigation. For certain cases, it is sufficient to study the problem in 2D. Therefore, an additional 2D solver shall be implemented into MOEVE PIC Tracking in order to reduce the computation times. Numerical studies of ion cloud dynamics in beam guiding magnets and drift sections of electron machines will be shown and compared with experimental results obtained at the ELSA facility. Work supported by Federal Ministry for Research and Education BMBF under contract 05K13HRC.