The breakthrough provided by plasma-based accelerators enabled unprecedented accelerating fields by boosting electron beams to gigaelectronvolt energies within a few centimeters [1–4]. This, in turn, allows the realization of ultracompact light sources based on free-electron lasers (FELs) [5], as demonstrated by two pioneering experiments that reported the observation of self-amplified spontaneous emission (SASE) driven by plasma-accelerated beams [6,7]. However, the lack of stability and reproducibility due to the intrinsic nature of the SASE process (whose amplification starts from the shot noise of the electron beam) may hinder their effective implementation for user purposes. Here, we report a proof-of-principle experiment using plasma-accelerated beams to generate stable and reproducible FEL light seeded by an external laser. FEL radiation is emitted in the infrared range, showing the typical exponential growth of its energy over six consecutive undulators. Compared to SASE, the seeded FEL pulses have energies 2 orders of magnitude larger and stability that is 3 times higher.

Galletti, M., Alesini, D., Anania, M. ., Arjmand, S., Behtouei, M., Bellaveglia, M., et al. (2022). Stable operation of a free-electron laser driven by a plasma accelerator. PHYSICAL REVIEW LETTERS, 129(23) [10.1103/PhysRevLett.129.234801].

Stable operation of a free-electron laser driven by a plasma accelerator

Galletti, M.
;
Cianchi, A.;
2022-11-29

Abstract

The breakthrough provided by plasma-based accelerators enabled unprecedented accelerating fields by boosting electron beams to gigaelectronvolt energies within a few centimeters [1–4]. This, in turn, allows the realization of ultracompact light sources based on free-electron lasers (FELs) [5], as demonstrated by two pioneering experiments that reported the observation of self-amplified spontaneous emission (SASE) driven by plasma-accelerated beams [6,7]. However, the lack of stability and reproducibility due to the intrinsic nature of the SASE process (whose amplification starts from the shot noise of the electron beam) may hinder their effective implementation for user purposes. Here, we report a proof-of-principle experiment using plasma-accelerated beams to generate stable and reproducible FEL light seeded by an external laser. FEL radiation is emitted in the infrared range, showing the typical exponential growth of its energy over six consecutive undulators. Compared to SASE, the seeded FEL pulses have energies 2 orders of magnitude larger and stability that is 3 times higher.
Pubblicato
Rilevanza internazionale
Articolo
Esperti anonimi
Settore FIS/07
Settore FIS/01
English
Con Impact Factor ISI
Free electron laser; x rays; compact accelerator; plasma; laser
Galletti, M., Alesini, D., Anania, M. ., Arjmand, S., Behtouei, M., Bellaveglia, M., et al. (2022). Stable operation of a free-electron laser driven by a plasma accelerator. PHYSICAL REVIEW LETTERS, 129(23) [10.1103/PhysRevLett.129.234801].
Galletti, M; Alesini, D; Anania, M ; Arjmand, S; Behtouei, M; Bellaveglia, M; Biagioni, A; Buonomo, B; Cardelli, F; Carpanese, M; Chiadroni, E; Cianchi, A; Costa, G; Del Dotto, A; Del Giorno, M; Dipace, F; Doria, A; Filippi, F; Franzini, G; Giannessi, L; Giribono, A; Iovine, P; Lollo, V; Mostacci, A; Nguyen, F; Opromolla, M; Pellegrino, L; Petralia, A; Petrillo, V; Piersanti, L; Di Pirro, G; Pompili, R; Romeo, S; Rossi, A ; Selce, A; Shpakov, V; Stella, A; Vaccarezza, C; Villa, F; Zigler, A; Ferrario, M
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2108/309376
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