Speaker
Description
CLARA is a high-brightness electron beam facility at STFC Daresbury Laboratory, aiming to deliver ultra-short electron bunches to a wide range of user experiments. CLARA has recently resumed operations after a major upgrade, and is currently undergoing beam commissioning at its nominal energy (250 MeV) and bunch charge (250 pC). During commissioning, studies of the transverse beam dynamics will be vital for optimizing the accelerator’s performance, and for validating the simulation models used during its design. Phase space tomography is a powerful technique for reconstructing a beam’s charge distribution in phase space; recent machine learning advances have led to faster, higher-resolution tomographic methods such as Generative Phase Space Reconstruction (GPSR). In this contribution, we present detailed measurements of the 4D transverse phase space at CLARA, for a range of bunch charges and beam energies. We validate the reconstructed phase spaces by using them to accurately predict the appearance of the electron beam for different beam optics configurations. Our results demonstrate methods that are now used for routine characterization of the CLARA electron beam, and represent the first emittance measurements at the accelerator’s design energy.
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