title: Intense terahertz pulses from SLAC electron beams using coherent transition radiation.
abstract: SLAC has two electron accelerators, the Linac Coherent Light Source (LCLS) and the Facility for Advanced Accelerator Experimental Tests (FACET), providing high-charge, high-peak-current, femtosecond electron bunches. These characteristics are ideal for generating intense broadband terahertz (THz) pulses via coherent transition radiation. For LCLS and FACET respectively, the THz pulse duration is typically 20 and 80 fs RMS and can be tuned via the electron bunch duration; emission spectra span 3-30 THz and 0.5 THz-5 THz; and the energy in a quasi-half-cycle THz pulse is 0.2 and 0.6 mJ. The peak electric field at a THz focus has reached 4.4 GV/m (0.44 V/Å) at LCLS. This paper presents measurements of the terahertz pulses and preliminary observations of nonlinear materials response.
authors: Accelerator Directorate, SLAC National Accelerator Laboratory, Stanford University, 2575 Sand Hill Road, Menlo Park, California 94025, USA.
authors: Ziran
authors: Z
authors: Wu
authors: Alan S
authors: AS
authors: Fisher
authors: John
authors: J
authors: Goodfellow
authors: Matthias
authors: M
authors: Fuchs
authors: Dan
authors: D
authors: Daranciang
authors: Mark
authors: M
authors: Hogan
authors: Henrik
authors: H
authors: Loos
authors: Aaron
authors: A
authors: Lindenberg
mesh_terms: D004583:Electrons; D008027:Light; D010315:Particle Accelerators / Q000295:instrumentation*; D055053:Terahertz Radiation; D055068:Terahertz Spectroscopy