  In recent years, Laser Plasma Acceleration (LPA) has become a promising
alternative to conventional RF accelerators. However, so far, it has only been
theoretically shown that generating polarized LPA beams is possible. The LEAP
(Laser Electron Acceleration with Polarization) project at DESY aims to
demonstrate this experimentally for the first time, using a pre-polarized
plasma target. The electron polarization will be measured with photon
transmission polarimetry, which makes use of the production of circularly
polarized bremsstrahlung during the passage of the electron beams through a
suitable converter target. The photon polarization is then measured with the
aid of transmission asymmetry arising from reversing the magnetization
direction of an iron absorber. In this contribution an overview of the LEAP
project is presented, detailing the generation of the polarized electron beams
along with the design and simulation studies of the polarimeter.
