Speaker
Description
Attosecond physics is an emerging as one of the fastest-growing, highest-impact, areas of science at FELs. In this proceeding, we compare several methods for generating single-spike attosecond soft x-ray pulses at LCLS. Over the last several years we have measured more than 30 independent attosecond SXR configurations, across which we can explore a variety of techniques, including: cathode-modulation, laser-heater pulse shaping, and wiggler-induced changes to the beamline impedance. In each configuration, we optimize the undulator taper to selectively lase on the strongly chirped portion of a narrow-current spike in the middle of the electron beam. From the taper optimization we can then infer properties of the attosecond radiation which we compare across multiple techniques.
Funding Agency
This work was supported by the U.S. Department of Energy, Office of Science, under Contract No. DE-AC02-76SF00515
