Journal
OPTICS EXPRESS
Volume 18, Issue 17, Pages 17620-17630Publisher
OPTICAL SOC AMER
DOI: 10.1364/OE.18.017620
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Funding
- U.S. Department of Energy, Office of Basic Energy Sciences
- U.S. DOE [DE-AC02-05CH11231]
- U.S. Department of Energy [DE-FG02-04ER15614]
- NSF [PHY-0649578]
- DOE-BES [DE-FG02-92ER14299]
- Alexander von Humboldt Foundation
- Chemical Sciences, Geosciences, and Biosciences Division of the Office of Basic Energy Sciences, Office of Science, US Department of Energy [DE-AC02-06CH11357]
- Swedish Foundation for International Cooperation in Research and Higher Education (STINT)
- U.S. Department of Energy (DOE) [DE-FG02-92ER14299, DE-FG02-04ER15614] Funding Source: U.S. Department of Energy (DOE)
- Direct For Mathematical & Physical Scien
- Division Of Physics [0969322] Funding Source: National Science Foundation
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The first time-resolved x-ray/optical pump-probe experiments at the SLAC Linac Coherent Light Source (LCLS) used a combination of feedback methods and post-analysis binning techniques to synchronize an ultrafast optical laser to the linac-based x-ray laser. Transient molecular nitrogen alignment revival features were resolved in time-dependent x-ray-induced fragmentation spectra. These alignment features were used to find the temporal overlap of the pump and probe pulses. The strong-field dissociation of x-ray generated quasi-bound molecular dications was used to establish the residual timing jitter. This analysis shows that the relative arrival time of the Ti:Sapphire laser and the x-ray pulses had a distribution with a standard deviation of approximately 120 fs. The largest contribution to the jitter noise spectrum was the locking of the laser oscillator to the reference RF of the accelerator, which suggests that simple technical improvements could reduce the jitter to better than 50 fs. (C) 2010 Optical Society of America
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