Generation of intense ultrashort x-ray pulses

David C. Eder; Richard A. London; Mordecai D. Rosen; George L. Strobel

doi:10.1117/12.168004

1 February 1994 Generation of intense ultrashort x-ray pulses

David C. Eder, Richard A. London, Mordecai D. Rosen, George L. Strobel

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Proceedings Volume 2015, Applications of Laser Plasma Radiation; (1994) https://doi.org/10.1117/12.168004
Event: SPIE's 1993 International Symposium on Optics, Imaging, and Instrumentation, 1993, San Diego, CA, United States

Abstract

Modeling of x-ray emission from targets heated by an ultrashort-pulse high-intensity optical laser is discussed. One application, using the emitted x rays, is pumping inner-shell photo- ionized x-ray lasers. Short wavelength lasing ((lambda) <EQ 15 angstrom) requires fast rise- time 1 - 3 keV x rays to ionize inner K-shell electrons. It has been shown that structured targets, consisting of grooves on a solid material or a composite of clusters, have high absorption. We model grooved targets as an ensemble of exploding foils finding that the rise time of x rays is rapid enough for pumping inner-shell x-ray lasers. We show that simple atomic models can overestimate the energy in x-ray emission bands: High-Z materials are found to have the highest conversion efficiency but mid-Z materials can be used to provide a band of emission at a particular energy. We show that the pondermotive inhibition of expansion has only a small effect on the x-ray emission.

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David C. Eder, Richard A. London, Mordecai D. Rosen, and George L. Strobel "Generation of intense ultrashort x-ray pulses", Proc. SPIE 2015, Applications of Laser Plasma Radiation, (1 February 1994); https://doi.org/10.1117/12.168004

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KEYWORDS

X-rays

Gold

Ionization

Laser optics

Copper

Neon

Solids

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