Abstract
The holmium plasma induced by a 1064-nmQ-switched Nd:YAG laser in air was investigated. This work was done theoretically and experimentally. Cowan code was used to get the emission spectra for different transition of the holmium target. In the experimental work, the evolution of the plasma was studied by acquiring spectral images at different laser pulse energies (600,650,700, 750, and 800 mJ). The repetition rates of (1Hz and 10Hz) in the UV region (200-400 nm). The results indicate that, the emission line intensities increase with increasing of the laser pulse energy and repetition rate. The strongest emission spectra appeared when the laser pulse energy is 800mJ and 10 Hz repetition rate at λ= 345.64nm, with the maximum intensity of 77000 counts.
Highlights
The plasma produced by intense laser pulse can give information about qualitative and quantitative analyses of the sample [1]
When the laser energy was increased to 700 mJ, the intensity of the emission line is increased, blue shift has been observed whereas the maximum intensity of emission spectra was (65535 at =ג341.43 nm), as shown in the Fig
The spectral line intensities of the laser induced plasma emission exhibited a strong dependence on pulsed laser energy and repetition rate The increasing of the laser pulse energy to 800 mJ and 10 Hz repetition rate new line maximum emission intensity appeared at = ג345.64 nm
Summary
The plasma produced by intense laser pulse can give information about qualitative and quantitative analyses of the sample [1]. The main focus of this paper is to classify the spectral lines intensity of holmium target in the (200–400) nm spectral range at different laser pulse energy with different repetition rate.
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