Generation of Argon Laser-Sustained Plasma using Diode Laser

Argon laser-sustained plasma (LSP) was generated using a 4-kW-class diode laser at pressures of 1.55–2.00 MPa. It found that there is tendency the minimum power for LSP generation to decrease from 4,200 W 2,850 as pressure increases. The temperature estimated based on emission spectroscopy approximately 12,000 K variation and 4,350 W. Because absorption coefficient increases with assuming inverse bremsstrahlung process, in consistent increase coefficient. There no significant change increased. Furthermore, tended slightly This because electron number density same temperature. Therefore, decreases