The duration of incoherent XUV pulses down to the femtoseconds (fs) can be retrieved through a statistical analysis of the modulations on the observed radiation spectrum. Uncorrelated shot-noise fluctuations in the pulse temporal profile result in incoherent radiation showing a multispike spectrum where the spike width is inversely proportional to the pulse length. In this Letter, single-shot temporal characterization of the betatron radiation pulses emitted by fs-long, 100’s MeV electron bunches undergoing acceleration, and propagating through a plasma wiggler was performed in the XUV domain. The retrieved pulse lengths agree with independent measurements performed in the THz spectral range and with theoretical predictions.
Measurement of femtosecond incoherent XUV pulses using shot-noise-driven fluctuations in plasma betatron sources / Curcio, A.; Berlanga, M. L.; Boudjema, N.; Chiadroni, E.; Cianchi, A.; Del Dotto, A.; Francescone, D.; Galletti, M.; Horny, V.; Huerta, A.; Mostacci, A.; Pérez-Hernández, J. A.; Petrarca, M.; Rodriguez, I.; Salgado-López, C.; Stocchi, F.; Tomassini, P.; Vladisavlevici, I.; Frias, M. D.; Ferrario, M.; Gatti, G.. - In: PHYSICAL REVIEW. E. - ISSN 2470-0045. - (2025). [10.1103/PhysRevE.111.L013201]
Measurement of femtosecond incoherent XUV pulses using shot-noise-driven fluctuations in plasma betatron sources
A. Curcio
Primo
;E. Chiadroni;A. Cianchi;D. Francescone;A. Mostacci;
2025
Abstract
The duration of incoherent XUV pulses down to the femtoseconds (fs) can be retrieved through a statistical analysis of the modulations on the observed radiation spectrum. Uncorrelated shot-noise fluctuations in the pulse temporal profile result in incoherent radiation showing a multispike spectrum where the spike width is inversely proportional to the pulse length. In this Letter, single-shot temporal characterization of the betatron radiation pulses emitted by fs-long, 100’s MeV electron bunches undergoing acceleration, and propagating through a plasma wiggler was performed in the XUV domain. The retrieved pulse lengths agree with independent measurements performed in the THz spectral range and with theoretical predictions.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
