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Title: Ultrafast laser pump/x-ray probe experiments

Abstract

In an ongoing project aimed at probing solids using x-rays obtained at the ALS synchrotron with a sub-picosecond time resolution following interactions with a 100 fs laser pulse, the authors have successfully performed pump-probe experiments limited by the temporal duration of ALS-pulse. They observe a drop in the diffraction efficiency following laser heating. They can attribute this to a disordering of the crystal. Studies with higher temporal resolution are required to determine the mechanism. The authors have also incorporated a low-jitter streakcamera as a diagnostic for observing time-dependant x-ray diffraction. The streakcamera triggered by a photoconductive switch was operated at kHz repetition rates. Using UV-pulses, the authors obtain a temporal response of 2 ps when averaging 5000 laser pulses. They demonstrate the ability to detect monochromatized x-ray radiation from a bend-magnet with the streak camera by measuring the pulse duration of a x-ray pulse to 70 ps. In conclusion, the authors show a rapid disordering of an InSb crystal. The resolution was determined by the duration of the ALS pulse. They also demonstrate that they can detect x-ray radiation from a synchrotron source with a temporal resolution of 2ps, by using an ultrafast x-ray streak camera. Their set-up will allowmore » them to pursue laser pump/x-ray probe experiments to monitor structural changes in materials with ultrafast time resolution.« less

Authors:
; ;  [1]
  1. Univ. of California, Berkeley, CA (United States); and others
Publication Date:
Research Org.:
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
OSTI Identifier:
603701
Report Number(s):
LBNL-39981
ON: DE97007345; TRN: 98:009623
Resource Type:
Technical Report
Resource Relation:
Other Information: PBD: Apr 1997; Related Information: Is Part Of Advanced light source: Compendium of user abstracts 1993--1996; PB: 622 p.
Country of Publication:
United States
Language:
English
Subject:
66 PHYSICS; TIME RESOLUTION; INDIUM ANTIMONIDES; HEATING; ORDER-DISORDER TRANSFORMATIONS; MEASURING METHODS; SOLIDS

Citation Formats

Larsson, J., Judd, E., and Schuck, P. J.. Ultrafast laser pump/x-ray probe experiments. United States: N. p., 1997. Web. doi:10.2172/603701.
Larsson, J., Judd, E., & Schuck, P. J.. Ultrafast laser pump/x-ray probe experiments. United States. https://doi.org/10.2172/603701
Larsson, J., Judd, E., and Schuck, P. J.. 1997. "Ultrafast laser pump/x-ray probe experiments". United States. https://doi.org/10.2172/603701. https://www.osti.gov/servlets/purl/603701.
@article{osti_603701,
title = {Ultrafast laser pump/x-ray probe experiments},
author = {Larsson, J. and Judd, E. and Schuck, P. J.},
abstractNote = {In an ongoing project aimed at probing solids using x-rays obtained at the ALS synchrotron with a sub-picosecond time resolution following interactions with a 100 fs laser pulse, the authors have successfully performed pump-probe experiments limited by the temporal duration of ALS-pulse. They observe a drop in the diffraction efficiency following laser heating. They can attribute this to a disordering of the crystal. Studies with higher temporal resolution are required to determine the mechanism. The authors have also incorporated a low-jitter streakcamera as a diagnostic for observing time-dependant x-ray diffraction. The streakcamera triggered by a photoconductive switch was operated at kHz repetition rates. Using UV-pulses, the authors obtain a temporal response of 2 ps when averaging 5000 laser pulses. They demonstrate the ability to detect monochromatized x-ray radiation from a bend-magnet with the streak camera by measuring the pulse duration of a x-ray pulse to 70 ps. In conclusion, the authors show a rapid disordering of an InSb crystal. The resolution was determined by the duration of the ALS pulse. They also demonstrate that they can detect x-ray radiation from a synchrotron source with a temporal resolution of 2ps, by using an ultrafast x-ray streak camera. Their set-up will allow them to pursue laser pump/x-ray probe experiments to monitor structural changes in materials with ultrafast time resolution.},
doi = {10.2172/603701},
url = {https://www.osti.gov/biblio/603701}, journal = {},
number = ,
volume = ,
place = {United States},
year = {1997},
month = {4}
}