Poster

PUBDB-2023-07204

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Towards a pre-polarised plasma source for spin-polarised laser-plasma acceleration

Stehr, F. P. G. (Corresponding author)DESY* ; Bohlen, S.DESY* ; Popp, J. (Corresponding author)DESY* ; List, J.DESY* ; Moortgat-Pick, G.DESY* ; Osterhoff, J.DESY* ; Poder, K.DESY*

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Abstract: Polarised beams are indispensable for many experiments in particle,atomic and nuclear physics where spin-dependent processes are to be studied.The LEAP (Laser Electron Acceleration with Polarisation) project at DESYaims to generate and measure spin-polarised electron beams from a compactlaser plasma accelerator (LPA) for the first time. The generation of spin-polarised beams from an LPA relies on a pre-polarised plasma source, wherehydrogen halide molecules are dissociated by a circularly polarised UV laserpulse. The dissociation of an HCl gas target requires a laser pulse with a wave-length of about 200 nm, which has to be synchronised with the LPA driver laser,as the depolarisation of the electrons in the gas occurs in the sub-nanosecondrange. Therefore, the UV pulse will be generated by cascaded second harmonicgeneration of the fundamental 800 nm LPA driver pulse. This contributionwill give an overview of the LEAP project and the experimental progress ofpreparing a pre-polarised plasma source for LPA.

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Contributing Institute(s):

1. Technol. zukünft. Teilchenph. Experim. (FTX)
2. Plasma Accelerators (MPA)

Research Program(s):

1. 621 - Accelerator Research and Development (POF4-621) (POF4-621)

Experiment(s):

1. No specific instrument

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