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Description
The AWAKE facility utilizes high-intensity single bunches to drive resonant wakes in plasma for the acceleration of electrons. Bunches that are a factor two shorter are required from the CERN Super Proton Synchrotron (SPS) for the next phase of the experimental programme. This contribution summarizes the key improvements to approach the new target parameters. An enhanced bunch production scheme was developed in the Proton Synchrotron Booster (PSB). It allows the preservation of the small longitudinal emittance during acceleration in the Proton Synchrotron (PS) without triggering an instability during the transition crossing. In addition, a double-voltage jump bunch rotation scheme has been implemented in the SPS, with RF voltage functions synchronised to the variable extraction time. The measurement results are compared with beam stability predictions and macroparticle simulations during the bunch compression. Finally, the remaining challenges and possible future improvements to reduce the extracted bunch length are discussed.
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