X-ray laser based on OFI is a promising way to realize the table-top X-ray laser.A simple model to describe the electron energy distribution in plasma produced by circularly polarized optical-field-induced ionization ...X-ray laser based on OFI is a promising way to realize the table-top X-ray laser.A simple model to describe the electron energy distribution in plasma produced by circularly polarized optical-field-induced ionization is constructed on the basis of ADK tunneling ionization theory.The ionization rate,threshold intensity,residual energy and electron energy distribution of Pd-like Xe system based on optical-field-induced ionization are calculated.The results are useful to further experments on X-ray laser of Pa-like Xe system.展开更多
Experimental investigations on the dis-sociation and ionization processes of NO2 in intensefields at wavelengths of 810, 405 and 270 nm, arepresented. The ratios of NO +2 /NO + are found to beindependent of the laser ...Experimental investigations on the dis-sociation and ionization processes of NO2 in intensefields at wavelengths of 810, 405 and 270 nm, arepresented. The ratios of NO +2 /NO + are found to beindependent of the laser intensity at these threewavelengths, but show strong dependence on thewavelengths. Longer wavelength produces a largerparent-ion yield in comparison with 405 nm. Peakprofiles of all the fragment ions clearly show little ki-netic energy releasing during the dissociation. Frag-ment ions are suggested to be produced from disso-ciation of the field ionized parent ions. Our resultsindicate that laser pulse wavelengths are the mostimportant parameters in ionization-fragmen- tationprocess of polyatomic molecules in intense field otherthan the laser intensity.展开更多
基金Sponsored by the National Natural Science Foundation of China(Grant No.10774033)the Harbin Science and Technology Innovation Fund(Grant No.RC2007QN017030)+1 种基金the HIT Foundation(Grant No.HIT2003.05)the Program of Excellent Team in Harbin Institute of Technology
文摘X-ray laser based on OFI is a promising way to realize the table-top X-ray laser.A simple model to describe the electron energy distribution in plasma produced by circularly polarized optical-field-induced ionization is constructed on the basis of ADK tunneling ionization theory.The ionization rate,threshold intensity,residual energy and electron energy distribution of Pd-like Xe system based on optical-field-induced ionization are calculated.The results are useful to further experments on X-ray laser of Pa-like Xe system.
文摘Experimental investigations on the dis-sociation and ionization processes of NO2 in intensefields at wavelengths of 810, 405 and 270 nm, arepresented. The ratios of NO +2 /NO + are found to beindependent of the laser intensity at these threewavelengths, but show strong dependence on thewavelengths. Longer wavelength produces a largerparent-ion yield in comparison with 405 nm. Peakprofiles of all the fragment ions clearly show little ki-netic energy releasing during the dissociation. Frag-ment ions are suggested to be produced from disso-ciation of the field ionized parent ions. Our resultsindicate that laser pulse wavelengths are the mostimportant parameters in ionization-fragmen- tationprocess of polyatomic molecules in intense field otherthan the laser intensity.
