Dresden 2014 – wissenschaftliches Programm

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BE: Beschleunigerphysik

BE 11: Accelerator Physics Poster Session

BE 11.11: Poster

Mittwoch, 2. April 2014, 17:00–19:30, P4

Bunch Emission Study of the PITZ Electron Gun by Use of the CST Particle Studio — •Ye Chen, Erion Gjonaj, Wolfgang Müller, and Thomas Weiland — Institut für Theorie Elektromagnetischer Felder,Technische Universität Darmstadt,Schloßgartenstr. 8, 64289 Darmstadt

The Photo Injector Test Facility at DESY Zeuthen (PITZ) is dedicated to test and to optimize sources of high brightness electron beams for future free electron lasers and linear colliders. The main task of PITZ is to produce an intense electron beam with very small transverse emittance. Bunch emission process contributes significantly to the emittance of a charged electron beam. In order to investigate the emittance manipulation, we have the possibility to perform Particle-in-Cell (PIC) simulations by use of the Computer Simulation Technology (CST) [1] code.

Depending on an extremely fine mesh resolution of 10 micrometers, CST simulations have shown convergent results on beam quality parameters for a bunch charge of 1nC. Cross-checking the results with A Space Charge Tracking Algorithm (ASTRA) [2] simulations showed good agreements on convergent trends of the beam parameters, while a discrepancy of 15% on transverse emittance can be found. Due to memory limitations and a long processing timescale, current simulation scheme give its way to further improvements.

[1] CST Computer Simulation Technology AG, CST Particle Studio, http://www.cst.de. [2] K. Flöttmann, ASTRA particle tracking code, http://www.desy.de/~mpyflo/.