Time delay measurement in the frequency domain

Journal Article · Thu Aug 06 00:00:00 EDT 2015 · Journal of Synchrotron Radiation (Online)

DOI:https://doi.org/10.1107/S1600577515014095· OSTI ID:1212890

Durbin, Stephen M. ^[1]; Liu, Shih -Chieh ^[1]; Dufresne, Eric M. ^[2]; Li, Yuelin ^[2]; Wen, Haidan ^[2]

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1. Purdue Univ., West Lafayette, IN (United States). Dept. of Physics and Astronomy.
2. Argonne National Lab., Argonne, IL (United States). Advanced Photon Source.

Pump–probe studies at synchrotrons using X-ray and laser pulses require accurate determination of the time delay between pulses. This becomes especially important when observing ultrafast responses with lifetimes approaching or even less than the X-ray pulse duration (~100 ps). The standard approach of inspecting the time response of a detector sensitive to both types of pulses can have limitations due to dissimilar pulse profiles and other experimental factors. Here, a simple alternative is presented, where the frequency response of the detector is monitored versus time delay. Measurements readily demonstrate a time resolution of ~1 ps. Improved precision is possible by simply extending the data acquisition time.

• Research Organization: Argonne National Laboratory, Chicago, IL (United States). Advanced Photon Source.
• Sponsoring Organization: USDOE Office of Science (SC)
• Grant/Contract Number: SC0004078; AC02-06CH11357
• OSTI ID: 1212890
• Journal Information: Journal of Synchrotron Radiation (Online), Vol. 22, Issue 5; ISSN 1600-5775
• Publisher: International Union of Crystallography
• Country of Publication: United States
• Language: English

Related Subjects

43 PARTICLE ACCELERATORS
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
pump-probe
X-ray synchrotron
ultrafast time resolution
RF frequency analysis