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Time-resolved pump-probe experiments at the LCLS
Uppsala University, Disciplinary Domain of Science and Technology, Biology, Department of Cell and Molecular Biology, Molecular biophysics.
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2010 (English)In: Optics Express, ISSN 1094-4087, Vol. 18, no 17, 17620-17630 p.Article in journal (Refereed) Published
Abstract [en]

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.

Place, publisher, year, edition, pages
2010. Vol. 18, no 17, 17620-17630 p.
National Category
Physical Sciences
URN: urn:nbn:se:uu:diva-135201DOI: 10.1364/OE.18.017620ISI: 000281054400005OAI: oai:DiVA.org:uu-135201DiVA: diva2:374775
Available from: 2010-12-06 Created: 2010-12-06 Last updated: 2012-03-09Bibliographically approved

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Hajdu, Janos
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