Developing the current experimental research into laser acceleration to a pre-commercial level

One of the main challenges in the field of laser acceleration is the beam transport of laser accelerated beams with a large energy spread. The same applies to a final focus system (FFS) for the high-flux laser-Thomson x-ray source at the conventional electron accelerator ELBE, where beams are chirped for longitudinal bunch compression. We found a telescope system consisting of four permanent quadrupole magnets to address the energy spread significantly better than a quadrupole triplet. We present the design of the system, magnet test results and emittance measurements at the interaction point.