Characterization of transient gain x-ray lasers

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We have performed numerical simulations of the transient collisional excitation Ni-like Pd 4d {r_arrow} 4p J = 0 {r_arrow} 1 147 {angstrom} laser transition recently observed at Lawrence Livermore National Laboratory (LLNL). The high gain {approximately}35 cm results from the experiment are compared with detailed modeling simulations from the 1-D RADEX code in order to better understand the main physics issues affecting the measured gain and x-ray laser propagation along the plasma column. Simulations indicate that the transient gain lifetime associated with the short pulse pumping and refraction of the x-ray laser beam out of the gain region are the ... continued below

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510 Kilobytes pages

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Dunn, J; Osterheld, A & Shlyaptsev, V February 7, 1999.

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Description

We have performed numerical simulations of the transient collisional excitation Ni-like Pd 4d {r_arrow} 4p J = 0 {r_arrow} 1 147 {angstrom} laser transition recently observed at Lawrence Livermore National Laboratory (LLNL). The high gain {approximately}35 cm results from the experiment are compared with detailed modeling simulations from the 1-D RADEX code in order to better understand the main physics issues affecting the measured gain and x-ray laser propagation along the plasma column. Simulations indicate that the transient gain lifetime associated with the short pulse pumping and refraction of the x-ray laser beam out of the gain region are the main detrimental effects. Gain lifetimes of {approximately}7 ps(1/e decay) are inferred from the smoothly changing gain experimental observations and are in good agreement with the simulations. Furthermore, the modeling results indicate the presence of a longer-lived but lower gain later in time associated with the transition from transient to quasi-steady state excitation.

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510 Kilobytes pages

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  • 6th International Conference on X-Ray Lasers, Kyoto (JP), 08/31/1999--09/04/1999

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  • Report No.: UCRL-JC-133237
  • Report No.: YN0100000
  • Report No.: 97-ERD-105
  • Grant Number: W-7405-ENG-48
  • Office of Scientific & Technical Information Report Number: 14737
  • Archival Resource Key: ark:/67531/metadc621284

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Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

Office of Scientific and Technical Information (OSTI) is the Department of Energy (DOE) office that collects, preserves, and disseminates DOE-sponsored research and development (R&D) results that are the outcomes of R&D projects or other funded activities at DOE labs and facilities nationwide and grantees at universities and other institutions.

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  • February 7, 1999

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  • June 16, 2015, 7:43 a.m.

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  • May 6, 2016, 3:15 p.m.

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Dunn, J; Osterheld, A & Shlyaptsev, V. Characterization of transient gain x-ray lasers, article, February 7, 1999; California. (digital.library.unt.edu/ark:/67531/metadc621284/: accessed April 21, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.