Title :
Investigations of Plasma Dynamics Within and After Laser Pulse Using Optical Streak Camera
Author :
Jian Wu ; Wenfu Wei ; Zefeng Yang ; Xingwen Li
Author_Institution :
State Key Lab. of Electr. Insulation & Power Equip., Xi´an Jiaotong Univ., Xi´an, China
Abstract :
Plasma dynamics within and after the laser pulse irradiation at different ambient gas pressures in air were investigated from the laser ablated Al plasma (1064 nm, 15 ns, and 1.8 J/mm2) using an optical streak camera. At 50 and 400 Pa, front positions of the fast moving part fitted well with the Drag model once the laser started. At 1 atm, multiple radiation regions caused by the laser-target ablation and air breakdowns were observed.
Keywords :
aluminium; plasma diagnostics; plasma production by laser; Al; ambient gas pressures; drag model; laser ablated Al plasma; laser pulse irradiation; laser-target ablation; optical streak camera; plasma dynamics; pressure 1 atm; pressure 50 Pa; pressure 500 Pa; time 15 ns; wavelength 1.64 nm; Cameras; Gas lasers; Integrated optics; Laser ablation; Laser beams; Laser modes; Plasmas; Laser ablation; plasma measurements; plasma measurements.;
Journal_Title :
Plasma Science, IEEE Transactions on
DOI :
10.1109/TPS.2014.2330354