TY  - JOUR
AU  - Hützen, Anna
AU  - Thomas, Johannes
AU  - Lehrach, Andreas
AU  - Rakitzis, T. Peter
AU  - Pukhov, Alexander
AU  - Ji, Liangliang
AU  - Wu, Yitong
AU  - Engels, Ralf
AU  - Büscher, Markus
TI  - Simulation of Polarized Beams from Laser-Plasma Accelerators
JO  - Journal of physics / Conference Series
VL  - 1596
IS  - 1
SN  - 1742-6588
CY  - Bristol
PB  - IOP Publ.87703
M1  - FZJ-2020-04780
SP  - 012013
PY  - 2020
AB  - The generation of polarized particle beams still relies on conventional particle accelerators, which are typically very large in scale and budget. 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 the particle spins are influenced by the huge magnetic fields of plasma and, thus, 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 Forschungszentrum Jülich (Germany), University of Crete (Greece), and SIOM Shanghai (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. We could show that intense polarized beams may be produced if pre-polarized gas targets of high density are employed. In these proceedings we further present that the polarization of protons in HT and HCl gas targets is largely conserved during laser wake-field acceleration, even if the proton energies enter the multi-GeV regime. Such polarized sources for electrons, protons, deuterons and 3He ions are now being built in Jülich. Proof-of-principle measurements at the (multi-)petawatt laser facilities PHELIX (GSI Darmstadt) and SULF (Shanghai) are in preparation.
LB  - PUB:(DE-HGF)16
DO  - DOI:10.1088/1742-6596/1596/1/012013
UR  - https://juser.fz-juelich.de/record/888231
ER  -