4.8 Article

Explosions of Xenon Clusters in Ultraintense Femtosecond X-Ray Pulses from the LCLS Free Electron Laser

Journal

PHYSICAL REVIEW LETTERS
Volume 108, Issue 13, Pages -

Publisher

AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.108.133401

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Funding

  1. U.S. Department of Energy National Nuclear Security Administration [DE-FC52-03NA00156]
  2. DOE Office of Basic Energy Sciences
  3. Welch Foundation [F-1626]
  4. German Research Foundation DFG [MO 719/6-1, BO 3/69/2-2]

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Explosions of large Xe clusters (< Ni > similar to 11 000) irradiated by femtosecond pulses of 850 eV x-ray photons focused to an intensity of up to 1017 W/cm(2) from the Linac Coherent Light Source were investigated experimentally. Measurements of ion charge-state distributions and energy spectra exhibit strong evidence for the formation of a Xe nanoplasma in the intense x-ray pulse. This x-ray produced Xe nanoplasma is accompanied by a three-body recombination and hydrodynamic expansion. These experimental results appear to be consistent with a model in which a spherically exploding nanoplasma is formed inside the Xe cluster and where the plasma temperature is determined by photoionization heating.

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