عنوان المقالة: Controlling the plasma electron number density of copper metal using NIR picosecond laser-induced plasma spectroscopy
ا.د. وليد توفيق يونس | Prof. Walid Tawfik | 6589
نوع النشر
مجلة علمية
المؤلفون بالعربي
الملخص الانجليزي
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 6.01×10 ¹⁰ to 12.35×10 ¹⁰ W/cm ² ± 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 1.09×10 ¹⁶ , 2.24×10 ¹⁶ , 3.60×10 ¹⁶ , and 4.75×10 ¹⁶ 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.
تاريخ النشر
01/01/2021
الناشر
Optica Applicata 51(3)
رقم المجلد
51
رقم العدد
3
رابط الملف
تحميل (0 مرات التحميل)
الكلمات المفتاحية
plasma electron number density , copper metal, picosecond, laser-induced, plasma spectroscopy
رجوع