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Characterization of laser plasma irradiation on solid target

By Ahmad Hadi Ali, Noriah Bidin, Mohd Nordin Jamian, Mohd Arif Agam, Zaidi Embong and Siti Nur Kamariah Rubani

Abstract

Plasma induced by focusing laser is very important phenomena to be applied in industries, medical and fusion research. A preliminary study leading to this research has been carried out. A Q-switch Nd:YAG laser with 1064 nrn and 532 nm wavelength and 4 ns pulse duration was employed as a source of energy. The laser was focused using a single lens technique. Some variable were used in this laser plasma characterization studies including range of lenses with different focal length, different laser frequency and laser energy. In preliminary studies, the plasma , generated at the focal region was detected and analyzed using video camera in conjunction of image processing system and interferornetric technique. For laser irradiation on solid target, the pulsed laser was irradiated on alurninums, steels, burnt papers, silicon wafer and nanospheres. The interaction area was analyzed using metallurgical microscope and FE-SEM. The observation results show that the plasma was formed in an oval-like shape. The width and the length of the plasma were found linearly increased with respect to the lens focal length. The plasma temperature was found can achieve up to thousands of Kelvin when studied using interferometric technique. Besides that, solid material target show some physical changes due to shock wave induced by the pulsed laser

Topics: QC Physics
Publisher: Universiti Tun Hussein Onn Malaysia
Year: 2011
OAI identifier: oai:eprints.uthm.edu.my:1787
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