TY  - JOUR
AU  - Buzzi, Michele
AU  - Makita, Mikako
AU  - Howald, Ludovic
AU  - Kleibert, Armin
AU  - Vodungbo, Boris
AU  - Maldonado, Pablo
AU  - Raabe, Jörg
AU  - Jaouen, Nicolas
AU  - Redlin, Harald
AU  - Tiedtke, Kai
AU  - Oppeneer, Peter M.
AU  - David, Christian
AU  - Nolting, Frithjof
AU  - Luning, Jan
TI  - Single-shot Monitoring of Ultrafast Processes via X-ray Streaking at a Free Electron Laser
JO  - Scientific reports
VL  - 7
IS  - 1
SN  - 2045-2322
CY  - London
PB  - Macmillan
M1  - PUBDB-2017-09033
SP  - 7253
PY  - 2017
AB  - The advent of x-ray free electron lasers has extended the unique capabilities of resonant x-ray spectroscopy techniques to ultrafast time scales. Here, we report on a novel experimental method that allows retrieving with a single x-ray pulse the time evolution of an ultrafast process, not only at a few discrete time delays, but continuously over an extended time window. We used a single x-ray pulse to resolve the laser-induced ultrafast demagnetisation dynamics in a thin cobalt film over a time window of about 1.6 ps with an excellent signal to noise ratio. From one representative single shot measurement we extract a spin relaxation time of (130 ± 30) fs with an average value, based on 193 single shot events of (113 ± 20) fs. These results are limited by the achieved experimental time resolution of 120 fs, and both values are in excellent agreement with previous results and theoretical modelling. More generally, this new experimental approach to ultrafast x-ray spectroscopy paves the way to the study of non-repetitive processes that cannot be investigated using traditional repetitive pump-probe schemes. 
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000406889500082
C6  - pmid:28775262
DO  - DOI:10.1038/s41598-017-07069-z
UR  - https://bib-pubdb1.desy.de/record/389787
ER  -