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Abstract
We present a table-top beamline providing a soft X-ray supercontinuum extending up to 370 eV from high-order harmonic generation with sub-13 fs 1300 nm driving pulses and simultaneous production of sub-5 fs pulses centered at 800 nm. Optimization of high harmonic generation in a long and dense gas medium yields a photon flux of ~ 1.4 × 106 photons/s/1% bandwidth at 300 eV. The temporal resolution of X-ray transient absorption experiments with this beamline is measured to be 11 fs for 800 nm excitation. This dual-wavelength approach, combined with high flux and high spectral and temporal resolution soft X-ray absorption spectroscopy, is a new route to the study of ultrafast electronic dynamics in carbon-containing molecules and materials at the carbon K-edge.
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Details
1 University of California, Department of Chemistry, Berkeley, USA (GRID:grid.47840.3f) (ISNI:0000 0001 2181 7878); Lawrence Berkeley National Laboratory, Chemical Sciences Division, Berkeley, USA (GRID:grid.184769.5) (ISNI:0000 0001 2231 4551)
2 University of California, Department of Chemistry, Berkeley, USA (GRID:grid.47840.3f) (ISNI:0000 0001 2181 7878)
3 University of California, Department of Chemistry, Berkeley, USA (GRID:grid.47840.3f) (ISNI:0000 0001 2181 7878); Advanced Research Center for Nanolithography (ARCNL), Science Park 106, 1098 XG, Amsterdam, The Netherlands (GRID:grid.494537.8)
4 University of California, Department of Chemistry, Berkeley, USA (GRID:grid.47840.3f) (ISNI:0000 0001 2181 7878); Lawrence Berkeley National Laboratory, Chemical Sciences Division, Berkeley, USA (GRID:grid.184769.5) (ISNI:0000 0001 2231 4551); University of California, Department of Physics, Berkeley, USA (GRID:grid.47840.3f) (ISNI:0000 0001 2181 7878)