Abstract
Diffraction radiation is one of the most promising candidates for electron beam diagnostics for the International Linear Collider, x-ray free electron lasers and energy recovery linac due to its non-intercepting characteristics. We report the non-intercepting measurement of sub-ps electron bunch length with coherent diffraction radiation. The bunch length is measured with a Martin—Puplett interferometer and the detailed longitudinal bunch shape is reconstructed with the Kramers—Kronig relation. The rms bunch length is found to be about 0.73 ps, which confirms a successful commissioning of the bunch compressor and the interferometer.
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