Speaker
Description
The AWAKE Experiment at CERN is a proof-of-principle experiment that uses proton-driven plasma wakefields to accelerate externally injected electrons. Since initial operations in 2016, multiple experimental phases have been completed, with the most recent being Run 2b, which demonstrated the positive effect of using a plasma density step on the wakefield amplitude. Beam instrumentation played a crucial role during this phase, enabling, for example, imaging of the particle beams on the screens placed at various locations both upstream and downstream of the plasma. The next phase, Run 2c, is planned to begin in 2029 and will introduce a second electron beam line delivering 150 MeV, 200 fs (RMS)-long electron bunches, as well as a second plasma. In this configuration, the existing 18 MeV injector will seed the proton self-modulation in the first plasma, while the new 150 MeV beam line will serve as the witness beam for acceleration in the second plasma. The increased experimental scale together with the need for advanced beam diagnostics, such as those capable of resolving sub-picosecond electron bunches, imposes new challenges, requiring more diagnostics, specialised instrumentation and careful system integration. This contribution presents the diagnostic systems used during Run 2b, outlines the upgrades and new diagnostics planned for Run 2c, and discusses the associated challenges.
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