Using a noninvasive, electro-optically based electron bunch arrival time measurement at FLASH (free electron laser in Hamburg) the temporal resolution of two-color pump-probe experiments has been significantly improved. The system determines the relative arrival time of the extended ultraviolet pulse of FLASH and an amplified Ti:sapphire femtosecond-laser pulse at the interaction region better than 90 fs rms. In a benchmarking pump-probe experiment using two-color above threshold ionization of noble gases, an enhancement in the timing resolution by a factor of 4 compared to the uncorrected data is obtained.
Time-resolved pump-probe experiments beyond the jitter limitations at FLASH
A. Azima, S. Düsterer, P. Radcliffe, H. Redlin, N. Stojanovic, W. Li, H. Schlarb, J. Feldhaus, D. Cubaynes, M. Meyer, J. Dardis, P. Hayden, P. Hough, V Richardson, E. T. Kennedy, J. T. Costello; Time-resolved pump-probe experiments beyond the jitter limitations at FLASH. Appl. Phys. Lett. 6 April 2009; 94 (14): 144102. https://doi.org/10.1063/1.3111789
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