8 July 1993 Demonstration designs for optical-field-ionized plasma x-ray lasers
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Proceedings Volume 1860, Short-Pulse High-Intensity Lasers and Applications II; (1993); doi: 10.1117/12.147572
Event: OE/LASE'93: Optics, Electro-Optics, and Laser Applications in Scienceand Engineering, 1993, Los Angeles, CA, United States
Abstract
We propose a demonstration experiment of optical-field-ionized plasma x-ray lasing at 247 angstroms in Nitrogen which can tolerate strong refractive defocussing. The relatively low ionization potential energy of approximately equals 98 eV in Nitrogen should result in correspondingly low residual electron temperature Te which, in turn, allows large gain at lower values of electron density. The use of low electron density provides less collisional heating as well as reduced refractive defocussing. In addition to using low electron density to mitigate refraction, we also propose the use of a wide UV laser-driver focus to give reduced transverse intensity gradients near the laser axis. Milder transverse intensity gradients lead to longer refraction lengths which effectively define the volume of x-ray lasing. These two techniques for avoiding excessive refraction are used in tandem to identify an experimental regime where x-ray lasing dominates spontaneous noise by an unambiguous margin associated with a gain-length product of five.
© (1993) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Peter A. Amendt, David C. Eder, Richard A. London, Bernie M. Penetrante, Mordecai D. Rosen, "Demonstration designs for optical-field-ionized plasma x-ray lasers", Proc. SPIE 1860, Short-Pulse High-Intensity Lasers and Applications II, (8 July 1993); doi: 10.1117/12.147572; http://dx.doi.org/10.1117/12.147572
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KEYWORDS
Plasma

X-rays

Ultraviolet radiation

X-ray lasers

Nitrogen

Neon

Ionization

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