| Paper | Title | Page |
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THOC3 |
Few-fs X-ray Pulse Length Measurement at LCLS | |
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| The Linac Coherent Light Source (LCLS) has an unique operating mode, delivering X-ray pulses of only a few femtoseconds (fs) length, though so far the precise X-ray pulse length has been experimentally inaccessible. In a recent experiment we measured the LCLS pulse length in this regime to be 4 fs fwhm by overlapping the FEL pulse with an optical infrared laser in a Neon gas jet. The IR laser maps the temporal X-ray pulse profile into the energy spectrum of the generated photolectrons. By measuring the photoelectron spectrum a direct characterization of the FEL pulse is possible. In the experiment we were able to directly access the temporal substructure of the X-ray pulses, measured the typical pulse length in the LCLS low charge mode to be 4 fs fwhm and showed single-spike, single-fs X-ray pulses. | ||
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Slides THOC3 [2.818 MB] | |