Record Details

Title:
Attosecond time–energy structure of X-ray free-electron laser pulses
Affiliation(s):
EuXFEL staff
Author group:
Instrument SQS
X-Ray Photon Diagnostics
Theory
Keyword(s):
Topic:
Scientific area:
Abstract:
The time–energy information of ultrashort X-ray free-electron laser pulses generated by the Linac Coherent Light Source is measured with attosecond resolution via angular streaking of neon 1s photoelectrons. The X-ray pulses promote electrons from the neon core level into an ionization continuum, where they are dressed with the electric field of a circularly polarized infrared laser. This induces characteristic modulations of the resulting photoelectron energy and angular distribution. From these modulations we recover the single-shot attosecond intensity structure and chirp of arbitrary X-ray pulses based on self-amplified spontaneous emission, which have eluded direct measurement so far. We characterize individual attosecond pulses, including their instantaneous frequency, and identify double pulses with well-defined delays and spectral properties, thus paving the way for X-ray pump/X-ray probe attosecond free-electron laser science.
Imprint:
London, United Kingdom, Nature, 2018
Journal Information:
Nature Photonics, 12, 215–220 (2018)
Related external records:
Language(s):
English


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 Record created 2018-03-07, last modified 2019-01-30


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