Fast Polarization Switching Demonstration Using Crossed-Planar Undulator in a Seeded Free Electron Laser

Abstract

Fast polarization switching of light sources is required over a wide spectral range to investigate the symmetry of matter. In this Letter, we report the first experimental demonstration of the crossed-planar undulator technique at a seeded free-electron laser, which holds great promise for the full control and fast switching of the polarization of short-wavelength radiation. In the experiment, the polarization state of the coherent radiation at the 2nd harmonic of the seed laser is switched successfully. The experiment results confirm the theory, and pave the way for applying the crossed-planar undulator technique for the seeded X-ray free electron lasers.

5 pages, 5 figures

References in corpus (2)

• Using Off-Resonance Laser Modulation for Beam Energy Spread Cooling in Generation of Short-Wavelength Radiation
• Statistical Analysis of Crossed Undulator for Polarization Control in a SASE FEL

Cited by in corpus (7)

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• Free Electron Laser Generation of X-Ray Poincaré Beams
• Polarization control of an X-ray free electron laser oscillator
• A novel measurement approach for near-edge x-ray absorption fine structure: continuous 2$\pi$ angular rotation of linear polarization
• Single-shot measurement of free-electron laser polarization at SDUV-FEL
• Numerical study of transverse position monitor and compensation for x-ray polarization diagnosis
• Time-resolved electron beam diagnostics with sub-femtosecond resolution