학술논문
First emittance measurement of the beam-driven plasma wakefield accelerated electron beam
Document Type
Working Paper
Author
Shpakov, V.; Anania, M. P.; Behtouei, M.; Bellaveglia, M.; Biagioni, A.; Cesarini, M.; Chiadroni, E.; Cianchi, A.; Costa, G.; Croia, M.; Del Dotto, A.; Diomede, M.; Dipace, F.; Ferrario, M.; Galletti, M.; Giribono, A.; Liedl, A.; Lollo, V.; Magnisi, L.; Mostacci, A.; Di Pirro, G.; Piersanti, L.; Pompili, R.; Romeo, S.; Rossi, A. R.; Scifo, J.; Vaccarezza, C.; Villa, F.; Zigler, A.
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Subject
Language
Abstract
Next-generation plasma-based accelerators can push electron beams to GeV energies within centimetre distances. The plasma, excited by a driver pulse, is indeed able to sustain huge electric fields that can efficiently accelerate a trailing witness bunch, which was experimentally demonstrated on multiple occasions. Thus, the main focus of the current research is being shifted towards achieving a high quality of the beam after the plasma acceleration. In this letter we present beam-driven plasma wakefield acceleration experiment, where initially preformed high-quality witness beam was accelerated inside the plasma and characterized. In this experiment the witness beam quality after the acceleration was maintained on high level, with $0.2\%$ final energy spread and $3.8~\mu m$ resulting normalized transverse emittance after the acceleration. In this article, for the first time to our knowledge, the emittance of the PWFA beam was directly measured.