Observation of Coherently-Enhanced Tunable Narrow-Band Terahertz Transition Radiation from a Relativistic Sub-Picosecond Electron Bunch Train

Abstract

We experimentally demonstrate the production of narrow-band ($\delta f/f\simeq 20$% at $f\simeq 0.5$ THz) THz transition radiation with tunable frequency over [0.37, 0.86] THz. The radiation is produced as a train of sub-picosecond relativistic electron bunches transits at the vacuum-aluminum interface of an aluminum converter screen. We also show a possible application of modulated beams to extend the dynamical range of a popular bunch length diagnostic technique based on the spectral analysis of coherent radiation.

3 pages, 6 figures

References in corpus (2)

• Tunable subpicosecond electron bunch train generation using a transverse-to-longitudinal phase space exchange technique
• Numerical modeling of a table-top tunable Smith-Purcell Terahertz free-electron laser operating in the super-radiant regime

Cited by in corpus (5)

• IOTA (Integrable Optics Test Accelerator): Facility and Experimental Beam Physics Program
• Bunch Shaping in Electron Linear Accelerators
• Ballistic Bunching of Photo-Injected Electron Bunches with Dielectric-Lined Waveguide
• Monochromaticity of coherent Smith-Purcell radiation from finite size grating
• Micro-bunching for generating tunable narrow-band THz radiation at the FAST photoinjector