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TY - CONF AU - Zhou, G. AU - Liu, W. AU - Qin, W. AU - Raubenheimer, T.O. AU - Tsai, C.-Y. AU - Wu, J. AU - Yang, B. AU - Yang, C. AU - Yoon, M. ED - Bishofberger, Kip:Carlsten, Bruce (LANL, Los Alamos, NM, USA)[ORCID:0000-0001-5619-907X] ED - Schaa, Volker RW TI - Measurement of Short-Wavelength High-Gain FEL Temporal Coherence Length by a Phase Shifter J2 - Proc. of FEL2017, Santa Fe, NM, USA, August 20-25, 2017 C1 - Santa Fe, NM, USA T2 - International Free Electron Laser Conference T3 - 38 LA - english AB - Short-wavelength high-gain free-electron lasers (FELs) are now well established as a source of ultra-fast, ultra-brightness, longitudinally partial coherent light. Since coherence is one of the fundamental properties of light source, so continual effort is devoted to high-gain free-electron laser coherence measurements. In this work, we propose a possible approach, employing a phase shifter to induce electron beam delay to measure the temporal coherence length. Simple analysis, numerical simulation and preliminary experimental results are presented. This approach can be robust and independent of frequency. PB - JACoW CP - Geneva, Switzerland SP - 344 EP - 347 KW - ion KW - FEL KW - electron KW - experiment KW - radiation DA - 2018/02 PY - 2018 SN - 978-3-95450-179-3 DO - 10.18429/JACoW-FEL2017-TUP057 UR - http://jacow.org/fel2017/papers/tup057.pdf ER -