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Application of a picosecond soft x-ray source to time-resolved plasma dynamics
Donald Umstadter Publications
  • J. Workman, University of Michigan, Ann Arbor
  • M. Nantel, University of Michigan, Ann Arbor
  • Anatoly Maksimchuk, University of Michigan
  • Donald P. Umstadter, University of Nebraska-Lincoln
Date of this Version

Published by American Institute of Physics. Applied Physics Letters 70, 312 (1997). © 1997 American Institute of Physics. Permission to use.

We demonstrate the application of an ultrashort x-ray source as an external probe to measure plasma dynamics. The plasma is generated by a 100-fs Ti: sapphire laser focused onto thin metallic films. Time-resolved spectroscopy of the gold x-ray probe transmission through a perturbed 1000 Å aluminum film reveals redshifts of the L-shell photoabsorption edge. We show that the dynamic behavior of this shift is consistent with the relaxation of the aluminum following the compression generated by a shock wave traveling through the film. An analytic plasma model, with comparison to a numerical hydrodynamics model, indicates compression up to 1.4 times solid density.
Citation Information
J. Workman, M. Nantel, Anatoly Maksimchuk and Donald P. Umstadter. "Application of a picosecond soft x-ray source to time-resolved plasma dynamics" (1997)
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