Near-Ultraviolet Luminescence of N{sub 2} Irradiated by Short X-Ray Pulses

The Linac Coherent Light Source is an x-ray free-electron laser that recently demonstrated lasing in the 1.5-15 A wavelength range. We report on luminescence measurements of a molecular nitrogen gas irradiated by {approx}2 mJ, 80 fs x-ray pulses at energies of 0.83, 2.7, and 8.3 keV. These results p...

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Bibliographic Details
Published in:Physical review letters 2010-07, Vol.105 (4)
Main Authors: Hau-Riege, Stefan P., Bionta, Richard M., Ryutov, Dmitri D., London, Richard A., Ables, Elden, Kishiyama, Keith I., Shen, Stewart, McKernan, Mark A., McMahon, Donn H., Messerschmidt, Marc, Krzywinski, Jacek, Stefan, Peter, Turner, James, Ziaja, Beata, SLAC National Accelerator Laboratory, 2575 Sand Hill Road, Menlo Park, California 94025, Center for Free-Electron Laser Science, DESY, D-22607 Hamburg
Format: Article
Language:English
Subjects:
ACCELERATORS
ELECTROMAGNETIC RADIATION
ELEMENTS
EMISSION
ENERGY RANGE
FLUORESCENCE
FREE ELECTRON LASERS
IONIZING RADIATIONS
KEV RANGE
LASERS
LIGHT SOURCES
LINEAR ACCELERATORS
LUMINESCENCE
NEAR ULTRAVIOLET RADIATION
NITROGEN
NONMETALS
PARTICLE ACCELERATORS
PHOTON EMISSION
PULSES
RADIATION SOURCES
RADIATIONS
SIGNALS
SPACE CHARGE
ULTRAVIOLET RADIATION
WAVELENGTHS
X RADIATION
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Summary:The Linac Coherent Light Source is an x-ray free-electron laser that recently demonstrated lasing in the 1.5-15 A wavelength range. We report on luminescence measurements of a molecular nitrogen gas irradiated by {approx}2 mJ, 80 fs x-ray pulses at energies of 0.83, 2.7, and 8.3 keV. These results provide a direct test of our current understanding of photoabsorption, electron dynamics, and fluorescence processes for such intense, ultrashort x-ray pulses. At 0.83 keV, the duration of the fluorescence signal depends strongly on space-charge effects. At 8.3 keV, space-charge effects are weak, and the signal duration is determined by the Auger electron dynamics.
ISSN:0031-9007
1079-7114
DOI:10.1103/PHYSREVLETT.105.043003