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Title: Two-photon absorption of soft X-ray free electron laser radiation by graphite near the carbon K-absorption edge

Journal Article · · Chemical Physics Letters
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  1. Univ. of California, Berkeley, CA (United States); Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
  2. Univ. of California, Berkeley, CA (United States)
  3. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
  4. SLAC National Accelerator Lab., Menlo Park, CA (United States)
  5. Elettra-Sincrotrone Trieste S.C.p.A., Trieste (Italy)
  6. Institute of Photonics and Nanotechnologies, Padova (Italy); Univ. of Padova, Padova (Italy)
  7. Elettra-Sincrotrone Trieste S.C.p.A., Trieste (Italy); Univ. of Nova Gorica, Nova Gorica (Slovenia)
  8. National Renewable Energy Lab. (NREL), Golden, CO (United States)
  9. Center for High Pressure Science & Technology Advanced Research, Shanghai (China)
  10. Elettra-Sincrotrone Trieste S.C.p.A., Trieste (Italy); Elettra Lab., Trieste (Italy)
  11. Institute of Photonics and Nanotechnologies, Padova (Italy)
  12. Elettra-Sincrotrone Trieste S.C.p.A., Trieste (Italy); ENEA, Frascati (Rome) (Italy)
  13. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States); SLAC National Accelerator Lab., Menlo Park, CA (United States)

We have examined the transmission of soft X-ray pulses from the FERMI free electron laser through carbon films of varying thickness, quantifying nonlinear effects of pulses above and below the carbon K-edge. At typical of soft X-ray free electron laser intensities, pulses exhibit linear absorption at photon energies above and below the K-edge, ~308 and ~260 eV, respectively; whereas two-photon absorption becomes significant slightly below the K-edge, ~284.2 eV. The measured two-photon absorption cross section at 284.18 eV (~6 × 10-48cm4s) is 7 orders of magnitude above what is expected from a simple theory based on hydrogen-like atoms - a result of resonance effects.

Research Organization:
SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States); Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES). Chemical Sciences, Geosciences, and Biosciences Division
Grant/Contract Number:
AC02-05CH11231; SC0004993; AC36-08-GO28308; AC02-76S00515; AC02-76SF00515; W911NF-13-1-0483; W911NF-17-1-0163; DGE 1106400
OSTI ID:
1469091
Alternate ID(s):
OSTI ID: 1477330; OSTI ID: 1698224
Journal Information:
Chemical Physics Letters, Vol. 703, Issue C; ISSN 0009-2614
Publisher:
ElsevierCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 6 works
Citation information provided by
Web of Science

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Figures / Tables (2)


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