Production of temporally flat top UV laser pulses for SPARC photo-injector

M. Petrarca; P. Musumeci; M. C. Mattioli; C. Vicario; G. Gatti; A. Ghigo; S. Cialdi; I. Boscolo

doi:10.1117/12.742108

23 May 2007 Production of temporally flat top UV laser pulses for SPARC photo-injector

M. Petrarca, P. Musumeci, M. C. Mattioli, C. Vicario, G. Gatti, A. Ghigo, S. Cialdi, I. Boscolo

Proceedings Volume 6634, International Conference on Charged and Neutral Particles Channeling Phenomena II; 66341I (2007) https://doi.org/10.1117/12.742108
Event: International Conference on Charged and Neutral Particles Channeling Phenomena II, 2006, Rome, Italy

Abstract

In the SPARC photoinjector, the amplified Ti:Sa laser system is conceived to produce an UV flat top pulse profile required to reduce the beam emittance by minimizing the non-linear space charge effects in the photoelectrons pulse. Beam dynamic simulations indicate that the optimal pulse distribution must be flat top in space and time with 10 ps FWHM duration, 1 ps of rise and fall time and a limited ripple on the plateau. In a previous work it was demonstrated the possibility to use a programmable dispersive acousto-optics (AO) filter to achieve pulse profile close to the optimal one. In this paper we report the characterization of the effects of harmonics conversion on the pulse temporal profile. A technique to overcome the harmonics conversion distortions on the laser pulses at the fundamental wavelength in order to obtain the target pulse profile is explained too. Measurements and simulations in the temporal and spectral domain at the fundamental laser wavelength and at the second and third harmonics are presented in order to validate our work. It is also described a time diagnostic device for the UV pulses.

Citation Download Citation

M. Petrarca, P. Musumeci, M. C. Mattioli, C. Vicario, G. Gatti, A. Ghigo, S. Cialdi, and I. Boscolo "Production of temporally flat top UV laser pulses for SPARC photo-injector", Proc. SPIE 6634, International Conference on Charged and Neutral Particles Channeling Phenomena II, 66341I (23 May 2007); https://doi.org/10.1117/12.742108

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