Two-photon absorption of soft X-ray free electron laser radiation by graphite near the carbon K-absorption edge
Journal Article
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· Chemical Physics Letters
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- Univ. of California, Berkeley, CA (United States); Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
- Univ. of California, Berkeley, CA (United States)
- Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
- SLAC National Accelerator Lab., Menlo Park, CA (United States)
- Elettra-Sincrotrone Trieste S.C.p.A., Trieste (Italy)
- Institute of Photonics and Nanotechnologies, Padova (Italy); Univ. of Padova, Padova (Italy)
- Elettra-Sincrotrone Trieste S.C.p.A., Trieste (Italy); Univ. of Nova Gorica, Nova Gorica (Slovenia)
- National Renewable Energy Lab. (NREL), Golden, CO (United States)
- Center for High Pressure Science & Technology Advanced Research, Shanghai (China)
- Elettra-Sincrotrone Trieste S.C.p.A., Trieste (Italy); Elettra Lab., Trieste (Italy)
- Institute of Photonics and Nanotechnologies, Padova (Italy)
- Elettra-Sincrotrone Trieste S.C.p.A., Trieste (Italy); ENEA, Frascati (Rome) (Italy)
- 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
Cited by: 6 works
Citation information provided by
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