8 July 1993 Production of dense vapor targets for laser-plasma interaction studies with intense ultrashort pulses
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Proceedings Volume 1860, Short-Pulse High-Intensity Lasers and Applications II; (1993); doi: 10.1117/12.147575
Event: OE/LASE'93: Optics, Electro-Optics, and Laser Applications in Scienceand Engineering, 1993, Los Angeles, CA, United States
Abstract
The technique of laser-induced ablation of thin films from glass slide substrates has been investigated as a candidate vapor target production method for studies of both tunneling-driven x-ray/xuv recombination lasers and relativistic propagation using intense, ultra-short laser pulses. It is shown by simultaneous two-wavelength interferometry that particle densities of order 1019/cm3 are readily achieved and that some intrinsic ionization accompanies the plume formation. Absorption measurements with both 100 picosecond and 125 femtosecond pulses are consistent with observed edge velocities near 106 cm/sec. The level of ionization drive by the intense 125 femtosecond laser pulse has been coarsely estimated. Averaged estimates from spectral blue shifting of spectra transmitted through the plume are consistently lower than those obtained from evaluation of saturation intensity thresholds based on the sequential nonresonant optical field ionization (OFI) process.
© (1993) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Paul Robert Bolton, David C. Eder, Gary Guethlein, Richard E. Stewart, Peter E. Young, "Production of dense vapor targets for laser-plasma interaction studies with intense ultrashort pulses", Proc. SPIE 1860, Short-Pulse High-Intensity Lasers and Applications II, (8 July 1993); doi: 10.1117/12.147575; http://dx.doi.org/10.1117/12.147575
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KEYWORDS
Ionization

Pulsed laser operation

Femtosecond phenomena

Glasses

Interferometry

Laser applications

Particles

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