In our lab, we can perform time-resolved XUV photoemission experiments at an 87 MHz repetition rate using a cavity-enhanced HHG source. Harmonics are generated at 87 MHz by resonantly enhancing a Yb:fiber laser capable of 1 μJ pulses in a passive optical cavity to pulse energies > 100 μJ. Average photon fluxes of up to 7x1011 photons/s in a single isolated harmonic are delivered to a surface science end station. This delivered flux and repetition rate are comparable to a synchrotron light source, but with pulse durations nearly 1000 times shorter. In this paper, we discuss critical details of the source and its performance.
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Christopher Corder, Peng Zhao, Xinlong Li, Matthew D. Kershis, Michael G. White, Thomas K. Allison, "Development of a tunable high repetition rate XUV source for time-resolved photoemission studies of ultrafast dynamics at surfaces," Proc. SPIE 10519, Laser Applications in Microelectronic and Optoelectronic Manufacturing (LAMOM) XXIII, 105190B (16 February 2018);