Tunable and precise two-bunch generation at FLASHForward

Abstract

Beam-driven plasma-wakefield acceleration based on external injection has the potential to significantly reduce the size of future accelerators. Stability and quality of the acceleration process substantially depends on the incoming bunch parameters. Precise control of the current profile is essential for optimising energy-transfer efficiency and preserving energy spread. At the FLASHForward facility, driver--witness bunch pairs of adjustable bunch length and separation are generated by a set of collimators in a dispersive section, which enables fs-level control of the longitudinal bunch profile. The design of the collimator apparatus and its commissioning is presented.

7 pages, 5 figures, to be published in the proceedings of the 4th European Advanced Accelerator Concepts Workshop, 15-21 September 2019, La Biodola Bay, Isola d'Elba, Italy

References in corpus (1)

• Generation of Relativistic Electron Bunches with Arbitrary Current Distribution via Transverse-to-Longitudinal Phase Space Exchange

Cited by in corpus (6)

• Recovery time of a plasma-wakefield accelerator
• Emittance preservation in a plasma-wakefield accelerator
• Formation of Temporally Shaped Electron Bunches for Beam-Driven Collinear Wakefield Accelerators
• Longitudinally resolved measurement of energy-transfer efficiency in a plasma-wakefield accelerator
• Slice Emittance Preservation and Focus Control in a Passive Plasma Lens
• A dump leakage calorimeter to measure the flux of high-energy electrons and photons