Bunch shaping experiments at the high brightness electron beam source laboratory (HBESL)

In this paper, we present recent results from bunch-shaping experiments using alpha-BBO crystal at the High Brightness Electron Beam Source Laboratory (HBESL). alpha-BBO crystals were used to shape the ultra-short laser pulse (< 100fs) at HBESL to generate twin pulses at the cathode. The twin electron pulses were transported down the linac ( < 5 MeV) to a transverse deflecting mode cavity and the temporal profile recorded on the screen. The longitudinal time profile of the twin pulses show the difference between the effect of crystals and the longitudinal space charge effect. The electron beam was recorded for various position of the crystal and bunch charge.