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Proceedings Paper

Soft x-ray Thomson scattering in warm dense hydrogen at FLASH
Author(s): R. R. Fäustlin; S. Toleikis; Th. Bornath; T. Döppner; S. Düsterer; E. Förster; C. Fortmann; S. H. Glenzer; S. Göde; G. Gregori; R. Irsig; T. Laarmann; H. J. Lee; B. Li; K.-H. Meiwes-Broer; J. Mithen; A. Przystawik; H. Redlin; R. Redmer; H. Reinholz; G. Röpke; F. Tavella; R. Thiele; J. Tiggesbäumker; I. Uschmann; U. Zastrau; Th. Tschentscher
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Paper Abstract

We present collective Thomson scattering with soft x-ray free electron laser radiation as a method to track the evolution of warm dense matter plasmas with ~200 fs time resolution. In a pump-probe scheme an 800 nm laser heats a 20 μm hydrogen droplet to the plasma state. After a variable time delay in the order of ps the plasma is probed by an x-ray ultra violet (XUV) pulse which scatters from the target and is recorded spectrally. Alternatively, in a self-Thomson scattering experiment, a single XUV pulse heats the target while a portion of its photons are being scattered probing the target. From such inelastic x-ray scattering spectra free electron temperature and density can be inferred giving insight on relaxation time scales in plasmas as well as the equation of state. We prove the feasibility of this method in the XUV range utilizing the free electron laser facility in Hamburg, FLASH. We recorded Thomson scattering spectra for hydrogen plasma, both in the self-scattering and in the pump-probe mode using optical laser heating.

Paper Details

Date Published: 28 September 2009
PDF: 9 pages
Proc. SPIE 7451, Soft X-Ray Lasers and Applications VIII, 74510D (28 September 2009); doi: 10.1117/12.825958
Show Author Affiliations
R. R. Fäustlin, Deutsches Elektronen-Synchrotron (Germany)
S. Toleikis, Deutsches Elektronen-Synchrotron (Germany)
Th. Bornath, Univ. Rostock (Germany)
T. Döppner, Lawrence Livermore National Lab. (United States)
S. Düsterer, Deutsches Elektronen-Synchrotron (Germany)
E. Förster, Friedrich-Schiller-Univ. Jena (Germany)
C. Fortmann, Univ. Rostock (Germany)
S. H. Glenzer, Lawrence Livermore National Lab. (United States)
S. Göde, Univ. Rostock (Germany)
G. Gregori, Univ. of Oxford (United Kingdom)
R. Irsig, Univ. Rostock (Germany)
T. Laarmann, Deutsches Elektronen-Synchrotron (Germany)
H. J. Lee, Univ. of California, Berkeley (United States)
B. Li, Central Laser Facility, Science and Technology Facilities Council (United Kingdom)
K.-H. Meiwes-Broer, Univ. Rostock (Germany)
J. Mithen, Univ. of Oxford (United Kingdom)
A. Przystawik, Univ. Rostock (Germany)
H. Redlin, Deutsches Elektronen-Synchrotron (Germany)
R. Redmer, Univ. Rostock (Germany)
H. Reinholz, Univ. Rostock (Germany)
G. Röpke, Univ. Rostock (Germany)
F. Tavella, Deutsches Elektronen-Synchrotron (Germany)
R. Thiele, Univ. Rostock (Germany)
J. Tiggesbäumker, Univ. Rostock (Germany)
I. Uschmann, Friedrich-Schiller-Univ. Jena (Germany)
U. Zastrau, Friedrich-Schiller-Univ. Jena (Germany)
Th. Tschentscher, Deutsches Elektronen-Synchrotron (Germany)

Published in SPIE Proceedings Vol. 7451:
Soft X-Ray Lasers and Applications VIII
James Dunn; Gregory J. Tallents, Editor(s)

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