We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
High-brightness table-top hard X-ray source driven by sub-100-femtosecond mid-infrared pulses.
- Authors
Weisshaupt, Jannick; Juvé, Vincent; Holtz, Marcel; Ku, ShinAn; Woerner, Michael; Elsaesser, Thomas; Ališauskas, Skirmantas; Pugžlys, Audrius; Baltuška, Andrius
- Abstract
Ultrafast structural dynamics in the condensed phase represents a key topic of current physics, chemistry and materials science. Femtosecond hard X-ray pulses are important structure probes that have been applied in time-resolved X-ray absorption and diffraction. Optical pump/X-ray probe schemes with compact laser-driven table-top sources have allowed for tiny changes of diffracted intensity to be measured with X-ray photon statistics, which has set the ultimate sensitivity limit. To address the strong quest for a higher X-ray flux, here we present the first hard X-ray plasma source driven by intense mid-infrared sub-100-fs pulses at 3.9 μm. The comparably long optical period allows for accelerating electrons from the Cu target to very high kinetic energies and for generating a characteristic Kα flux of 109 photons per pulse, 25 times more than with our 800 nm driver. Theoretical simulations account for the experimental results in a wide range of driving fields and predict a further enhancement of X-ray flux.
- Subjects
HIGH-brightness accelerators; FEMTOSECOND pulses; HARD X-rays; OPTICAL pumping; FLUX (Energy); BEAM dynamics
- Publication
Nature Photonics, 2014, Vol 8, Issue 12, p927
- ISSN
1749-4885
- Publication type
Article
- DOI
10.1038/nphoton.2014.256