Controlling the plasma electron number density of copper metal using NIR picosecond laser-induced plasma spectroscopy

• Autorzy: Fikry Mohamed , Tawfik Walid , Omar Magdy

Identyfikatory

DOI

10.37190/oa210305

• Języki publikacji: EN

Abstrakty

EN

In this paper, we investigate a new method to control the plasma electron number density of copper metal using a near-infrared (NIR) picosecond Nd:YAG laser-induced plasma spectroscopy (LIPS) technique. The applied laser parameters are as follows; laser pulse energy and intensity varied from 29.2 to 59.4 mJ ± 3% and from 6.01×10¹⁰ to 12.35×10¹⁰ W/cm² ± 5%, respectively, for a single pulse at 170 ps pulse duration, and beam diameter about 0.5 ± 0.1 mm. By considering the Stark broadening of a specific spectral line, electron density can be calculated using a neutral copper line at 521.8 nm, assuming the local thermodynamic equilibrium (LTE) condition. The observed electron density values were 1.09×10¹⁶, 2.24×10¹⁶, 3.60×10¹⁶, and 4.75×10¹⁶ cm^–3 for the laser pulse energies 29.2, 41, 52.4, and 59.4 mJ, respectively. The plasma electron density values are increased with the increase in laser pulse energy. Such findings were interpreted due to an increase in the mass ablation rates with laser pulse energy. The obtained results explore the ability to control the plasma electron density by controlling the picosecond pulse energy. These results can contribute to the development of plasma technologies and their applications in many fields.

Słowa kluczowe

EN

picosecond; LIPS; laser induced plasma spectroscopy; copper; electron density; Stark broadening

• Wydawca: Oficyna Wydawnicza Politechniki Wrocławskiej
• Czasopismo: Optica Applicata
• Rocznik: 2021
• Tom: Vol. 51, nr 3
• Strony: 365--374
• Opis fizyczny: Bibliogr. 32 poz., rys., tab.

Twórcy

autor

Fikry Mohamed

• Department of Physics, Faculty of Science, Cairo University, Cairo, Egypt
• Egypt Nanotechnology Center (EGNC), Cairo University, Cairo, Egypt

autor

Tawfik Walid

• National Institute of Laser Enhanced Sciences (NILES), Cairo University, Cairo, Egypt

autor

Omar Magdy

• Department of Physics, Faculty of Science, Cairo University, Cairo, Egypt

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