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TY - CONF AU - Luo, H. AU - Chu, P.X. AU - Guo, J. AU - Li, X.H. AU - Liu, T. AU - Wang, K. AU - Xu, Y.X. AU - Zhao, X. AU - Zhou, Q.H. ED - Schaa, Volker R.W. ED - Decking, Winfried ED - Sinn, Harald ED - Geloni, Gianluca ED - Schreiber, Siegfried ED - Marx, Michaela TI - Characterizing a Coherent Electron Source Extracted From a Cold Atom Trap J2 - Proc. of FEL2019, Hamburg, Germany, 26-30 August 2019 CY - Hamburg, Germany T2 - Free Electron Laser Conference T3 - 39 LA - english AB - In order to generate a fully coherent free electron laser (FEL) within a compact system, one approach is to interact a coherent electron bunch with a high power laser operating in the quantum FEL regime. The coherent electron source is obtained by ionizing the Rydberg atoms in a magneto-optical trap (MOT). The qualities of the electron source will have direct effects on the brightness, coherence, and line width of the free electron laser. A high quality ultra-cold electron source is obtained by carefully optimizing the extraction electrode structure, the acceleration and focusing system as well as the MOT. Through parameter optimization, a coherent electron source with a temperature lower than 10 K is obtained. Details of the optimization and the characteristics of the coherent electron source are reported in this paper. PB - JACoW Publishing CP - Geneva, Switzerland SP - 469 EP - 472 KW - electron KW - emittance KW - cavity KW - controls KW - laser DA - 2019/11 PY - 2019 SN - "" SN - 978-3-95450-210-3 DO - doi:10.18429/JACoW-FEL2019-WEP059 UR - http://jacow.org/fel2019/papers/wep059.pdf ER -