UV Pulse Shaping with a-BBO Crystals for the Photocathode RF Gun

Dong Wang, Wenhui Huang, Lixin Yan, Kim, Dong Eon (Ed.), Schaa, Volker RW (Ed.), Petit-Jean-Genaz, Christine (Ed.), Ko, In Soo (Ed.), Kim, Kyung Sook (Ed.)
Recently, manipulation with the drive laser plays a significant role in high brightness electron beam production by the photocathode RF gun. The method based on pulse stacking with birefringent crystal serials was tried to longitudinally shape ultraviolet laser pulse. Using four or five pieces of a-BBO crystals to stack an input UV pulse with appropriate initial duration into 16 or 32 sub-pulses to form quasi flattop UV laser pulse, which can be applied for emittance optimization of the
more » ... tion of the electron beam based on the photocathode RF gun. Moreover, the negative slop of the energy transmittance of a-BBO serials is also revealed to be a passive stabilization mechanism for energy jitter reduction in the driving laser. With appropriate design of a-BBO serials, this method can fulfill the requirements for driving laser in a broad scope of applications such as x-ray FELs and high-power Terahertz(THz) radiation production.
doi:10.18429/jacow-ipac2016-thpow059 fatcat:3vnrvtsiu5gaxga4cxf4ctwybq