Dresden 2020 – scientific programme
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AKBP: Arbeitskreis Beschleunigerphysik
AKBP 4: New Accelerator Concepts
AKBP 4.1: Talk
Monday, March 16, 2020, 16:30–16:45, GÖR 226
Polarized Particle Beams from Laser-Plasma Accelerators — •Anna Hützen1,2, Johannes Thomas2, Andreas Lehrach3,4, T. Peter Rakitzis5,6, Alexander Pukhov2, Liangliang Li7,8, Yitong Wu7,8, Ralf Engels4, and Markus Büscher1,2 — 1PGI-6, FZJ — 2HHU Düsseldorf — 3JARA-FAME — 4IKP, FZJ — 5University of Crete, Greece — 6FORTH, Greece — 7SIOM, China — 8CAS, China
The generation of polarized particle beams still relies on conventional particle accelerators which are typically very large in scale and budget. Thus, concepts based on laser-driven wakefield acceleration have strongly been promoted during the last decades. Despite many advances in the understanding of fundamental physical phenomena, one largely unexplored issue is how highly polarized beams can be produced. The realization of laser-plasma based accelerators for polarized beams is now being pursued as a joint effort of groups from Germany (FZJ, RWTH, HHU), Greece, and China within the ATHENA consortium. As a first step, we have theoretically investigated and identified the mechanisms that influence the beam polarization in laser-plasma accelerators. We then carried out a set of Particle-in-cell simulations on the acceleration of electrons and proton beams from gaseous and foil targets showing the generation of intense polarized beams if pre-polarized gas targets of high density are employed. Such polarized sources for electrons, protons, deuterons and 3He ions are now being built at FZJ. Proof-of-principle measurements at the (multi-)PW laser facilities PHELIX (GSI) and SULF (Shanghai) are in preparation.