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Title: Time delay measurement in the frequency domain

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.
 [1] ;  [1] ;  [2] ;  [2] ;  [2]
  1. Purdue Univ., West Lafayette, IN (United States). Dept. of Physics and Astronomy.
  2. Argonne National Lab., Argonne, IL (United States). Advanced Photon Source.
Publication Date:
Grant/Contract Number:
SC0004078; AC02-06CH11357
Accepted Manuscript
Journal Name:
Journal of Synchrotron Radiation (Online)
Additional Journal Information:
Journal Name: Journal of Synchrotron Radiation (Online); Journal Volume: 22; Journal Issue: 5; Journal ID: ISSN 1600-5775
International Union of Crystallography
Research Org:
Argonne National Laboratory, Chicago, IL (United States). Advanced Photon Source.
Sponsoring Org:
USDOE Office of Science (SC)
Country of Publication:
United States
43 PARTICLE ACCELERATORS; 46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY; pump-probe; X-ray synchrotron; ultrafast time resolution; RF frequency analysis
OSTI Identifier: