Speaker
Description
In molecular systems, quantum-level electron motions occur on the sub-femtosecond timescale. In order to probe such dynamics, high energy attosecond pulses are required to provide the necessary spatial and temporal resolutions. At LCLS, the X-ray Laser-Enhanced Attosecond Pulses (XLEAP) collaboration develops operation modes for attosecond pulses in the soft and hard X-ray regimes for these studies. Here, we experimentally demonstrate the generation of high-power attosecond hard X-ray pulses via enhanced SASE driven by cathode laser shaping. Under this operation mode, we report pulses with tens of microjoules of energy and single-spike spectra with an average bandwidth of roughly 20 eV and an estimated pulse duration on the order of 100 as. Individual shots exhibit a bandwidth of up to 50 eV, paving the way to sub-100 as pulses with X-ray FELs.
Funding Agency
The U.S. DOE, Office of Basic Energy Sciences under Contract No. DE-AC02-76SF00515, and the U.S. DOE, Office of Science, Office of Basic Energy Sciences Accelerator and Detector Research Program.
