Characterization of laser plasma irradiation on solid target
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 en...
| Main Authors: | , , , , , |
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| Format: | Monograph |
| Published: |
Universiti Tun Hussein Onn Malaysia
2011
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| Subjects: | |
| Online Access: | http://eprints.uthm.edu.my/1787/ http://eprints.uthm.edu.my/1787/1/0733x.pdf |
| Summary: | 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. |
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