Soft X-ray scattering using FEL radiation for probing near-solid density plasmas at few electron volt temperatures |
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| Authors: | S Toleikis RR Fäustlin L Cao T Döppner S Düsterer E Förster C Fortmann SH Glenzer S Göde G Gregori R Irsig T Laarmann HJ Lee B Li J Mithen K-H Meiwes-Broer A Przystawik P Radcliffe R Redmer F Tavella Th Tschentscher |
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| Institution: | 1. DESY, Notkestrasse 85, 22607 Hamburg, Germany;2. Friedrich-Schiller-Universität Jena, Institut für Optik und Quantenelektronik, Max-Wien-Platz 1, 07743 Jena, Germany;3. LLNL, 7000 East Av., Livermore, CA 94550, USA;4. Universität Rostock, Institut für Physik, 18051 Rostock, Germany;5. University of Oxford, Parks Road, Oxford OX1 3PU, United Kingdom;6. University of California, Berkeley, CA 94720, USA;7. European XFEL Project Team, c/o DESY, Notkestrasse 85, 22607 Hamburg, Germany;8. Central Laser Facility, Rutherford Appleton Laboratory, Didcot OX11 0QX, United Kingdom |
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| Abstract: | We report on soft X-ray scattering experiments on cryogenic hydrogen and simple metal samples. As a source of intense, ultrashort soft X-ray pulses we have used free-electron laser radiation at 92 eV photon energy from FLASH at DESY, Hamburg. X-ray pulses with energies up to 150 μJ and durations 15–50 fs provide interaction with the sample leading simultaneously to plasma formation and scattering. Experiments exploiting both of these interactions have been carried out, using the same experimental setup. Firstly, recording of soft X-ray inelastic scattering from near-solid density hydrogen plasmas at few electron volt temperatures confirms the feasibility of this diagnostics technique. Secondly, the soft X-ray excitation of few electron volt solid-density plasmas in bulk metal samples could be studied by recording soft X-ray line and continuum emission integrated over emission times from fs to ns. |
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