SMuK 2023 – wissenschaftliches Programm

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AKBP: Arbeitskreis Beschleunigerphysik

AKBP 16: Poster

AKBP 16.2: Poster

Donnerstag, 23. März 2023, 15:45–18:30, HSZ OG3

Spin-polarized electron beam generation in the colliding pulse injection scheme — •Zheng Gong¹, Michael Quin¹, Simon Bohlen², Christoph Keitel¹, Kristjan Põder², and Matteo Tamburini¹ — ¹Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, 69117 Heidelberg, Germany — ²Deutsches Elektronen-Synchrotron DESY, Notkestr. 85, 22607 Hamburg, Germany

We studied the laser-wakefield acceleration of pre-polarized plasma electrons in the colliding pulse injection scheme. We found that the whole process is composed of two stages. In the first stage, the interaction between the plasma electrons and the transverse fields of the counterpropagating pulses leads to stochastic heating, which can substantially affect the longitudinal spin polarization of plasma electrons. As a result of the laser pulse collision, some plasma electrons gain a residue momentum in the longitudinal direction. The latter can result in the electrons being trapped and further accelerated by the forward-moving wakefield driven by the most intense laser pulse. The subsequent acceleration in the wakefield does not appreciably affect the longitudinal spin of the generated electron beam. Our theoretical model is supported by multi-dimensional particle-in-cell (PIC) simulations.