Titre :

Microbunching instability characterization via temporally modulated laser pulses

Auteur(s) :

Brynes, A. d. [Auteur]
Akkermans, I. [Auteur]
Allaria, E. [Auteur]
Badano, L. [Auteur]
Brussaard, S. [Auteur]
Danailov, M. [Auteur]
Demidovich, A. [Auteur]
de Ninno, G. [Auteur]
Elettra Sincrotrone Trieste
Giannessi, L. [Auteur]
Mirian, N. s. [Auteur]
Penco, G. [Auteur]
Perosa, G. [Auteur]
Ribič, P. Rebernik [Auteur]
Roussel, Eléonore [Auteur]
Laboratoire de Physique des Lasers, Atomes et Molécules - UMR 8523 [PhLAM]
DYnamique des Systèmes COmplexes [DYSCO]
Setija, I. [Auteur]
Smorenburg, P. [Auteur]
Spampinati, S. [Auteur]
Spezzani, C. [Auteur]
Trovò, M. [Auteur]
Williams, P. h. [Auteur]
Wolski, A. [Auteur]
Di Mitri, S. [Auteur]

Titre de la revue :

Physical Review Accelerators and Beams

Éditeur :

American Physical Society

Date de publication :

2020-10-13

Discipline(s) HAL :

Physique [physics]

Résumé en anglais : [en]

High-brightness electron bunches, such as those generated and accelerated in free-electron lasers (FELs), can develop small-scale structure in the longitudinal phase space. This causes variations in the slice energy spread ...
Lire la suite >High-brightness electron bunches, such as those generated and accelerated in free-electron lasers (FELs), can develop small-scale structure in the longitudinal phase space. This causes variations in the slice energy spread and current profile of the bunch which then undergo amplification, in an effect known as the microbunching instability. By imposing energy spread modulations on the bunch in the low-energy section of an accelerator, using an undulator and a modulated laser pulse in the center of a dispersive chicane, it is possible to manipulate the bunch longitudinal phase space. This allows for the control and study of the instability in unprecedented detail. We report measurements and analysis of such modulated electron bunches in the 2D spectrotemporal domain at the Fermi FEL, for three different bunch compression schemes. We also perform corresponding simulations of these experiments and show that the codes are indeed able to reproduce the measurements across a wide spectral range. This detailed experimental verification of the ability of codes to capture the essential beam dynamics of the microbunching instability will benefit the design and performance of future FELs.Lire moins >

Langue :

Anglais

Vulgarisation :

Non

Collections :

• Laboratoire de Physique des Lasers, Atomes et Molécules (PhLAM) - UMR 8523

Source :

Harvested from HAL