High-resolution sampling of beam-driven plasma wakefields.
Nature communications 11:1 (2020) 5984
Abstract:
Plasma-wakefield accelerators driven by intense particle beams promise to significantly reduce the size of future high-energy facilities. Such applications require particle beams with a well-controlled energy spectrum, which necessitates detailed tailoring of the plasma wakefield. Precise measurements of the effective wakefield structure are therefore essential for optimising the acceleration process. Here we propose and demonstrate such a measurement technique that enables femtosecond-level (15 fs) sampling of longitudinal electric fields of order gigavolts-per-meter (0.8 GV m-1). This method-based on energy collimation of the incoming bunch-made it possible to investigate the effect of beam and plasma parameters on the beam-loaded longitudinally integrated plasma wakefield, showing good agreement with particle-in-cell simulations. These results open the door to high-quality operation of future plasma accelerators through precise control of the acceleration process.Summary of Working Group 5: Plasma devices, plasma and beam diagnostics
Journal of Physics Conference Series IOP Publishing 1596:1 (2020) 012042
Tunable and precise two-bunch generation at FLASHForward
Journal of Physics Conference Series IOP Publishing 1596:1 (2020) 012002
Matching small β functions using centroid jitter and two beam position monitors
Physical Review Accelerators and Beams American Physical Society (APS) 23:5 (2020) 052802
Charge calibration of DRZ scintillation phosphor screens
Journal of Instrumentation IOP Publishing 14:09 (2019) p09025-p09025