Speaker
Description
We use attosecond interferometry to diagnose the temporal profile of attosecond pulse trains generated with a seeded free electron laser. A harmonic train is generated using the FERMI free electron laser with a seeding field of 266 nm. This harmonic pulse train is overlapped with a second 266 nm pulse at the Low Density Matter beamline. Two color photoemission in helium was analyzed using a novel correlation based approach to reveal harmonic phase differences in the APT. Our analysis method exploits the high kinetic energy resolution of the magnetic bottle electron spectrometer to reveal the femtosecond-scale harmonic phase variation of the attosecond pulse train. This technique has also been used to probe autoionizing resonances in the photoionization of neon.
Funding Agency
This work was supported by the US Department of Energy, Office of Science, Office of Basic Energy Sciences (BES), Chemical Sciences, Geosciences, and Biosciences Division (CSGB).
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