Terahertz Dual-Fed Relativistic Electron Bunch Compression

We present results of a THz-driven dual-fed electron bunch compression experiment. We have used two counter-propagating single-cycle THz pulses, generated by optical rectification in the nonlinear organic crystal OH1, to feed a tapered parallel-plate waveguide bunch compressor structure. We report measurement of sub 40 fs rms bunches, achieving compression by factor of 4 and jitter reduction by a factor of 3.6. This approach will open new frontiers toward revealing new dynamical behavior with unprecedented temporal resolution in exotic materials using UED.