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TY - UNPB AU - Zhang, Z. ED - Koscielniak, Shane ED - Satogata, Todd ED - Schaa, Volker RW ED - Thomson, Jana TI - Generation of High-Power, Tunable THz Radiation from Laser Interaction with a Relativistic Electron Beam J2 - Proc. of IPAC2018, Vancouver, BC, Canada, April 29-May 4, 2018 C1 - Vancouver, BC, Canada T2 - International Particle Accelerator Conference T3 - 9 LA - english AB - This invited talk proposes a method based on the slice energy spread modulation to generate strong subpicoseond density bunching in high-intensity relativistic electron beams. A laser pulse with periodic intensity envelope is used to modulate the slice energy spread of the electron beam, which can then be converted into density modulation after a dispersive section. It is found that the double-horn slice energy distribution of the electron beam induced by the laser modulation is very effective to increase the density modulation. Since the modulation is performed on a relativistic electron beam, the process does not suffer from strong space charge force or coupling between phase spaces. We show in both theory and simulations that the tunable radiation from the modulated beam can cover the frequency range of 1 ∼ 20 THz with high power and narrow-band spectra. This method can be used in storage ring or even thermal-cathode injectors with high-repetition rate. Experimental results will be reviewed. PB - JACoW Publishing CP - Geneva, Switzerland ER -