Author/Authors :
Radcliffe، نويسنده , , P. and Düsterer، نويسنده , , S. and Azima، نويسنده , , A. and Li، نويسنده , , W.B. and Plِnjes، نويسنده , , E. and Redlin، نويسنده , , H. and Feldhaus، نويسنده , , James J. and Nicolosi، نويسنده , , P. and Poletto، نويسنده , , L. and Dardis، نويسنده , , J. and Gutierrez، نويسنده , , J.P. and Hough، نويسنده , , P. and Kavanagh، نويسنده , , K.D. and Kennedy، نويسنده , , E.T. and Luna، نويسنده , , Tim H. and Yeates، نويسنده , , P. an، نويسنده ,
Abstract :
We describe an experimental system designed for single-shot photoelectron spectroscopy on free atoms and molecules at the Free Electron Laser in Hamburg (FLASH at DESY). The combination of the extreme ultra-violet (EUV) Free Electron Laser and a temporally synchronized optical fs laser (Ti:Sapphire) enables a variety of two-color pump-probe experiments. The spectral, temporal and spatial characteristics of both the EUV FEL and the optical laser pulses, the experimental procedure to control their overlap as well as the performance of an electron spectrometer used to obtain single-shot photoelectron spectra are discussed. As an illustration of the capabilities of this set-up, some results on two-photon two-color ionization of rare gases are presented.
Keywords :
free electron lasers , Photoionization , Photoelectron spectroscopy , EUV spectroscopy , Magnetic bottle electron spectrometer , Femtosecond lasers , Two-color photoionization
