Research on THz-band micro-bunch generation by phase-space control

In this research, we consider formation of micro-bunches as the longitudinally discrete structure in a single bunch, which are potentially useful for coherent radiation or dielectric acceleration driver (DLA). Such micro-bunches training around THz-band can be obtained by applying an emittance exchanger (EEX) to a beam modulated transversely, where the initial transverse structures are projected to longitudinal one with a certain compression. Two most interesting points of this technique are final parameters such as frequency or width of micro-bunches are widely and easily tunable and the EEX can be made using conventional techniques. In this research we prove such micro-bunch generation is possible in frame of linear optics and by using particle-tracking simulations (GPT). A similar study was already carried out by Y. Sun(Fermilab-conf-08-408-APC), but we have conducted this research independently and we put more interests in DLA. (author)