Generation of femtosecond pulses of synchrotron radiation |
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Authors: | Schoenlein Chattopadhyay Chong Glover Heimann Shank Zholents Zolotorev |
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Affiliation: | Materials Sciences Division, Accelerator and Fusion Research Division, Advanced Light Source, Ernest Orlando Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA. Applied Science and Technology Graduate Group, University of Calif. |
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Abstract: | Femtosecond synchrotron pulses were generated directly from an electron storage ring. An ultrashort laser pulse was used to modulate the energy of electrons within a 100-femtosecond slice of the stored 30-picosecond electron bunch. The energy-modulated electrons were spatially separated from the long bunch and used to generate approximately 300-femtosecond synchrotron pulses at a bend-magnet beamline, with a spectral range from infrared to x-ray wavelengths. The same technique can be used to generate approximately 100-femtosecond x-ray pulses of substantially higher flux and brightness with an undulator. Such synchrotron-based femtosecond x-ray sources offer the possibility of applying x-ray techniques on an ultrafast time scale to investigate structural dynamics in condensed matter. |
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