The Role of Laser Wavelength on the Early-stage Electron Density Evolution in Laser-Produced Plasma

Conference · Thu Apr 11 00:00:00 EDT 2024

DOI:https://doi.org/10.1117/12.3016463· OSTI ID:2448381

Polek, Mathew P. ^[1]; Beg, Farhat N. ^[2]; Harilal, Sivanandan S. ^[1]

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1. BATTELLE (PACIFIC NW LAB)
2. University of California

In this study, a laser-produced plasma (LPP) was generated by focusing fundamental (1064 nm), second (532nm), and fourth (266 nm) harmonic radiation from a 6 ns Nd:YAG laser at a laser intensity of 10 GW/cm2 onto a copper target placed in vacuum. The early time evolution of the plasma between 0-70 ns following laser ablation was then analyzed using Nomarski interferometry. The dependence of plasma properties such as the electron density distribution, plume velocity, and plume morphology on the laser wavelength are discussed.

• Research Organization: Pacific Northwest National Laboratory (PNNL), Richland, WA (United States)
• Sponsoring Organization: USDOE
• DOE Contract Number: AC05-76RL01830
• OSTI ID: 2448381
• Report Number(s): PNNL-SA-194624
• Country of Publication: United States
• Language: English

Related Subjects

(280.5395) Plasma Diagnostics
(140.3440) Laser-induced breakdown
2D fast imaging