@article {berrah2016two, title = {Two mirror X-ray pulse split and delay instrument for femtosecond time resolved investigations at the LCLS free electron laser facility}, journal = {Optics Express}, volume = {24}, number = {11}, year = {2016}, pages = {11768{\textendash}11781}, publisher = {Optical Society of America}, author = {Berrah, Nora and Fang, Li and Murphy, Brendan F and Kukk, Edwin and Osipov, Timur Y and Coffee, Ryan and Ferguson, Ken R and Xiong, Hui and Castagna, Jean-Charles and Petrovic, Vlad S and others} }