Traveling wave pumping of ultra-short pulse x-ray lasers

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Pumping of proposed inner-shell photo-ionized (ISPI) x-ray lasers places stringent requirements on the optical pump source. We investigate these requirements for an example x-ray laser (XRL) in Carbon lasing on the 2p-1s transition at 45 A. Competing with this lasing transition is the very fast Auger decay rate out of the upper lasing state, such that the x-ray laser would self-terminate on a femto- second time scale. XRL gain may be demonstrated if pump energy is delivered in a time short when compared to the Auger rate. The fast self-termination also demands that we sequentially pump the length of the ... continued below

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8 p.

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Snavely, R.A.; Da Silva, L.B.; Eder, D.C.; Matthews, D.L. & Moon, S.J. November 10, 1997.

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Pumping of proposed inner-shell photo-ionized (ISPI) x-ray lasers places stringent requirements on the optical pump source. We investigate these requirements for an example x-ray laser (XRL) in Carbon lasing on the 2p-1s transition at 45 A. Competing with this lasing transition is the very fast Auger decay rate out of the upper lasing state, such that the x-ray laser would self-terminate on a femto- second time scale. XRL gain may be demonstrated if pump energy is delivered in a time short when compared to the Auger rate. The fast self-termination also demands that we sequentially pump the length of the x-ray laser at the group velocity of the x-ray laser. This is the classical traveling wave requirement. It imposes a condition on the pumping source that the phase angle of the pump laser be precisely de- coupled from the pulse front angle. At high light intensities, this must be performed with a vacuum grating delay line. We will also include a discussion of issues related to pump energy delivery, i.e. pulse-front curvature, temporal blurring and puke fidelity. An all- reflective optical system with low aberration is investigated to see if it fulfills the requirements. It is expected that these designs together with new high energy (>1J) ultra-short pulse (< 40 fs) pump lasers now under construction may fulfill our pump energy conditions and produce a tabletop x-ray laser.

Physical Description

8 p.

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OSTI as DE98052121

Other: FDE: PDF; PL:

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  • Annual meeting of the Society of Photo-Optical Instrumentation Engineers, San Diego, CA (United States), 27 Jul - 1 Aug 1997

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  • Other: DE98052121
  • Report No.: UCRL-JC--125992
  • Report No.: CONF-970706--
  • Grant Number: W-7405-ENG-48
  • Office of Scientific & Technical Information Report Number: 310915
  • Archival Resource Key: ark:/67531/metadc674732

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  • November 10, 1997

Added to The UNT Digital Library

  • July 25, 2015, 2:20 a.m.

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  • April 6, 2017, 6:10 p.m.

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Snavely, R.A.; Da Silva, L.B.; Eder, D.C.; Matthews, D.L. & Moon, S.J. Traveling wave pumping of ultra-short pulse x-ray lasers, article, November 10, 1997; California. (digital.library.unt.edu/ark:/67531/metadc674732/: accessed October 21, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.