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TY - UNPB AU - Tang, C.-X. AU - Chao, A. AU - Deng, X.J. AU - Feikes, J. AU - Hoehl, A. AU - Huang, W.-H. AU - Klein, R. AU - Li, J. AU - Matveenko, A.N. AU - Petenev, Y. AU - Ries, M. AU - Yan, L.X. ED - Seidel, Mike ED - Aßmann, Ralph W. ED - Chautard, Frédéric ED - Schaa, Volker R.W. TI - First Experimental Demonstration of the Mechanism of Steady-state Microbunching J2 - Proc. of IPAC2020, Caen, France, 10-15 May 2020 CY - Caen, France T2 - International Particle Accelerator Conference T3 - 11 LA - english AB - The concept of steady-state microbunching (SSMB) in electron storage rings implies a longitudinal bunch structure given by an optical or ultraviolet wavelength rather than a conventional radio frequency wavelength, typically six or more orders of magnitude smaller. The strong coherent radiation from the steady-state microbunches will support a facility with high-power, high-repetition-rate or continuous-wave, narrow-band, and short-wavelength radiation, which can provide unprecedented new possibilities for accelerator photon science and industry applications. It has been proved that the electron beam energy modulation induced by an externally applied 1064 nm laser in an undulator can yield microbunching and coherent radiation one turn later at exactly the same place where the modulation was applied. The results confirm that the phase of an electron beam relative to a laser in a storage ring can be locked turn-by-turn in a sub-laser-wavelength precision, therefore making SSMB possible. This validation represents the first key advance in the development of an SSMB high-power light source. PB - JACoW Publishing CP - Geneva, Switzerland ER -