The spatially and time resolved 2D images of x-ray emission of line-shaped Ti laser plasmas have been obtained with a pinhole transmission grating spectrometer coupled with a x-ray streak camera.The x-ray emission non...The spatially and time resolved 2D images of x-ray emission of line-shaped Ti laser plasmas have been obtained with a pinhole transmission grating spectrometer coupled with a x-ray streak camera.The x-ray emission nonuniformity of the plasma is quantitatively analyzed using a perturbation spectrum analysis method.The results show that the nonuniformity has a minimum value at a time corresponding to the peak time of the pumping laser pulse,and increases after that.A brief discussion on the nonuniformity mechanism has also been presented.展开更多
Line-focused high power laser was used to irradiate a magnesium slab target in order to generate line-shaped laser-plasma.Plasma parameter profile distribution(electron temperature and electron density)on the directio...Line-focused high power laser was used to irradiate a magnesium slab target in order to generate line-shaped laser-plasma.Plasma parameter profile distribution(electron temperature and electron density)on the direction perpendicular to the target surface was obtained by spectroscopic diagnostic method,which is quite different from that of the spot-shaped laser-plasmas.New experimental phenomena that can be interpreted as“plasma satellites”were also observed.展开更多
基金Supported by the National Natural High Technology Program.
文摘The spatially and time resolved 2D images of x-ray emission of line-shaped Ti laser plasmas have been obtained with a pinhole transmission grating spectrometer coupled with a x-ray streak camera.The x-ray emission nonuniformity of the plasma is quantitatively analyzed using a perturbation spectrum analysis method.The results show that the nonuniformity has a minimum value at a time corresponding to the peak time of the pumping laser pulse,and increases after that.A brief discussion on the nonuniformity mechanism has also been presented.
文摘Line-focused high power laser was used to irradiate a magnesium slab target in order to generate line-shaped laser-plasma.Plasma parameter profile distribution(electron temperature and electron density)on the direction perpendicular to the target surface was obtained by spectroscopic diagnostic method,which is quite different from that of the spot-shaped laser-plasmas.New experimental phenomena that can be interpreted as“plasma satellites”were also observed.
