Author: Han, B.
Paper Title Page
Spatiotemporal Optimization of UV-Pump Pulses for the Ultrafast Electron Diffraction  
  • I.H. Baek, B. Han, K.H. Jang, Y.U. Jeong, H.W. Kim, K. Lee, S. H. Park, S. Park, N. Vinokurov
    KAERI, Daejon, Republic of Korea
  Ultraviolet (UV) light has been devoted to escape electrons from common metals due to their work function energies. Nowadays the pulsed electron beam has triggered numerous fundamental studies and technological applications. Electron beam-based pump/probe spectroscopy requires a low timing jitter between pump- and probe-beams for the precise observation and analysis. Herein, we performed the systematic characterization of electron bunches depending on UV pulse conditions using the electro-optic streaking of electron pulses for the ultrafast electron diffraction (UED) experiment. The temporal stabilization between UV-pump and electron-probe beams within a 100 femtoseconds jitter is in progress by compensating a relative phase shift of RF master oscillator and Ti:sapphire laser oscillator. We are under optimization of the spatial distribution and size of the UV light for getting electron bunches with low emittance and energy spread.