Compact laser plasma accelerators generate high-energy electron beams with increasing quality. When used in inverse Compton backscattering, however, the relatively large electron energy spread jeopardizes potential applications requiring small bandwidths. We present here a novel interaction scheme that allows us to compensate for the negative effects of the electron energy spread on the spectrum, by introducing a transverse spatial frequency modulation in the laser pulse. Such a laser chirp, together with a properly dispersed electron beam, can substantially reduce the broadening of the Compton bandwidth due to the electron energy spread. We show theoretical analysis and numerical simulations for hard X-ray Thomson sources based on laser plasma accelerators.
Original Publication Citation
Petrillo, V., Drebot, I., Krafft, G., Maroli, C., Rossi, A. R., Rossetti Conti, M. R., Ruijter, M., & Terzić, B. (2022). A laser frequency transverse modulation might compensate for the spectral broadening due to large electron energy spread in Thomson sources. Photonics, 9(2), 1-10, Article 62. https://doi.org/10.3390/photonics9020062
Petrillo, Vittoria; Drebot, Illya; Krafft, Geoffrey; Maroli, Cesare; Rossi, Andrea R.; Conti, Marcello Rossetti; Ruijter, Marcel; and Terzić, Balša, "A Laser Frequency Transverse Modulation Might Compensate for the Spectral Broadening Due to Large Electron Energy Spread in Thomson Sources" (2022). Physics Faculty Publications. 563.