摘要
Using Bethe model, the dynamics of the ionization and Conlomb explosion of hydrogen clusters （0.5 5 nm） in high-intensity （10^15- 10^17 W/cm^2） femtosecond laser pulses have been st, ndied theoretically, and tile dependence of energy of protons emitted from exploding clusters on cluster size and laser intensity has been investigated. It is found that the maximum proton energy increases exponentially with the cluster size, and the exponent is mainly determined by the laser intensity. For a given cluster size, the maximum proton energy increases with increasing laser intensity and gets saturat, ion gradually. The calculation results are in agreement with the recent experimental observation.
Using Bethe model, the dynamics of the ionization and Conlomb explosion of hydrogen clusters （0.5 5 nm） in high-intensity （10^15- 10^17 W/cm^2） femtosecond laser pulses have been st, ndied theoretically, and tile dependence of energy of protons emitted from exploding clusters on cluster size and laser intensity has been investigated. It is found that the maximum proton energy increases exponentially with the cluster size, and the exponent is mainly determined by the laser intensity. For a given cluster size, the maximum proton energy increases with increasing laser intensity and gets saturat, ion gradually. The calculation results are in agreement with the recent experimental observation.
基金
This work was supported by the National Natural Sci- ence Foundation of China under Grant No. 60408008.
