Characterization of laser produced plasma using laser induced breakdown spectroscopy
- Авторы: Ahmat L.1, Shahzada S.2, Haq S.1, Shah M.1, Nadeem A.1
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Учреждения:
- National Institute of Lasers and Optronics (NILOP)
- Departments of Physics
- Выпуск: Том 43, № 8 (2017)
- Страницы: 858-864
- Раздел: Laser Plasma
- URL: https://journals.rcsi.science/1063-780X/article/view/186355
- DOI: https://doi.org/10.1134/S1063780X17080013
- ID: 186355
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Аннотация
The plasma parameter studies of the Nd:YAG (neodymium-doped yttrium aluminum garnet, Nd:Y3Al15O12) crystal by using the fundamental (1064 nm) and second (532 nm) harmonics of Nd:YAG laser are reported. The electron temperature (Te) and electron number density (Ne) were determined using the Boltzmann plot method and the Stark-broadened line profile, respectively. An increase in the plasma parameters have been observed with an increase in the laser irradiance for both laser modes. The electron temperatures were calculated in the range of 0.53–0.66 eV for 1064 nm and 0.47–0.60 eV for 532 nm, and the electron number densities were determined in the range of 7.43 × 1015–3.27 × 1016 cm−3 for 1064 nm and 1.35 × 1016–3.97 × 1016 cm−3 for 532 nm in the studied irradiance range of 1.19–12.5 GW/cm2. However, the spatial evolution of the plasma parameters investigated up to 2.75 mm away from the target surface at a fixed laser irradiance of 6.51 GW/cm2 showed a decreasing trend. In addition, the estimated values of the inverse bremsstrahlung (IB) absorption coefficients at both laser wavelengths showed that the IB process is dominant for the 1064-nm laser.
Об авторах
L. Ahmat
National Institute of Lasers and Optronics (NILOP)
Email: drali_nadeem@yahoo.com
Пакистан, Islamabad, 45650
Shaista Shahzada
Departments of Physics
Email: drali_nadeem@yahoo.com
Пакистан, Sector H-10, Islamabad
S. Haq
National Institute of Lasers and Optronics (NILOP)
Email: drali_nadeem@yahoo.com
Пакистан, Islamabad, 45650
M. Shah
National Institute of Lasers and Optronics (NILOP)
Email: drali_nadeem@yahoo.com
Пакистан, Islamabad, 45650
Ali Nadeem
National Institute of Lasers and Optronics (NILOP)
Автор, ответственный за переписку.
Email: drali_nadeem@yahoo.com
Пакистан, Islamabad, 45650