TY - CPAPER AU - Yan, J. AU - Hao, H. AU - Huang, S. AU - Li, J.Y. AU - Mikhailov, S.F. AU - Popov, V. AU - Vinokurov, N. AU - Wu, J. AU - Wu, Y.K. TI - A Two-Color Storage Ring FEL J2 - Proc. of FEL2015 AB - Using different undulator configurations on the Duke storage ring, we have successfully achieved lasing with a novel two-color storage ring FEL. Using a pair of dual-band FEL mirrors, simultaneous lasing was realized in IR (around 720 nm) and in UV (around 360 nm). With this two-color FEL, we have demonstrated independent wavelength tuning of either IR or UV lasing. With careful tuning, we have also realized harmonic lasing with the UV lasing tuned to the second harmonic of the IR lasing. The tuning of harmonic two-color lasing has also been demonstrated with the locked wavelengths. Furthermore, we have demonstrated good control of the FEL power sharing between the two colors. The two-color FEL has created new opportunities to drive a two-color Compton gamma-ray beam at the High Intensity gamma-ray Source at Duke. PB - JACoW CY - Geneva, Switzerland SP - 571 EP - 575 KW - FEL KW - undulator KW - electron KW - cavity KW - operation DA - 2015/12 PY - 2015 SN - 978-3-95450-134-2 DO - 10.18429/JACoW-FEL2015-WEB01 UR - http://accelconf.web.cern.ch/AccelConf/FEL2015/papers/web01.pdf ER -