X-ray radiographic expansion measurements of isochorically heated thin wire targets

Journal Article · Sat Jun 15 00:00:00 EDT 2013 · Physics of Plasmas

DOI:https://doi.org/10.1063/1.4810801· OSTI ID:22228036

Hochhaus, D. C. ^[1]; Aurand, B. ^[1]; Basko, M. ^[1]; Ecker, B. ^[2]; Kühl, T. ^[3]; Ma, T. ^[4]; Rosmej, F. ^[5]; Zielbauer, B. ^[3]; Neumayer, P. ^[1]

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1. ExtreMe Matter Institute EMMI, GSI, 64291 Darmstadt (Germany)
2. Johannes Gutenberg-Universität, 55099 Mainz (Germany)
3. GSI Helmholtzzentrum für Schwerionenforschung GmbH, 64291 Darmstadt (Germany)
4. Lawrence Livermore National Laboratory, Livermore, California 94550 (United States)
5. UPMC, UMR7605, LULI, case 128, 4 Place Jussieu, 75252 Paris Cedex 05 (France)

Solid density matter at temperatures ranging from 150 eV to <5 eV has been created by irradiating thin wire targets with high-energy laser pulses at intensities ≈10{sup 18}W/cm{sup 2}. Energy deposition and transport of the laser-produced fast electrons are inferred from spatially resolved K{sub α}-spectroscopy. Time resolved x-ray radiography is employed to image the target mass density up to solid density and proves isochoric heating. The subsequent hydrodynamic evolution of the target is observed for up to 3 ns and is compared to radiation-hydrodynamic simulations. At distances of several hundred micrometers from the laser interaction region, where temperatures of 5–20 eV and small temperature gradients are found, the hydrodynamic evolution of the wire is a near axially symmetric isentropic expansion, and good agreement between simulations and radiography data confirms heating of the wire over hundreds of micrometers.

• OSTI ID: 22228036
• Journal Information: Physics of Plasmas, Vol. 20, Issue 6; Other Information: (c) 2013 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 1070-664X
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
AXIAL SYMMETRY
COMPARATIVE EVALUATIONS
ELECTRON TEMPERATURE
ELECTRONS
ENERGY ABSORPTION
ENERGY LOSSES
ION TEMPERATURE
ISENTROPIC PROCESSES
LASER TARGETS
LASER-PRODUCED PLASMA
PLASMA DIAGNOSTICS
PLASMA EXPANSION
PLASMA HEATING
PLASMA PRODUCTION
TEMPERATURE GRADIENTS
TIME RESOLUTION
TITANIUM
X-RAY RADIOGRAPHY