Up to third-order temporal correction in terms of a small dimensionless temporal parameter ε=1/（ωoto） （ω0=ck0 the central oscillatory frequency, to the pulse duration of half period）, the field expressions of u...Up to third-order temporal correction in terms of a small dimensionless temporal parameter ε=1/（ωoto） （ω0=ck0 the central oscillatory frequency, to the pulse duration of half period）, the field expressions of ultra-short focused laser pulses are explicitly presented. To evaluate the correction efficacy, electric amplitudes of zeroth-order and higher-order corrected fields are compared for different pulse durations. Furthermore, electron interaction with ultra-short laser pulses is simulated using both the zeroth-order and higher-order corrected field equations. Our simulation results show that the third-order correction terms should be considered for investigating the interaction if the laser pulse duration decreases to a few optical periods.展开更多
We show that there are two mechanisms responsible for the net energy exchange between an intense pulsed laser and an electron in vacuum,namely,stimulated Compton scattering and nonlinear Compton scattering(NLCS).For N...We show that there are two mechanisms responsible for the net energy exchange between an intense pulsed laser and an electron in vacuum,namely,stimulated Compton scattering and nonlinear Compton scattering(NLCS).For NLCS,being the only effect in a mono-frequency continuous laser beam,its contribution is also indepen dently determined.The characteristics of these two mechanisms in connection with the net energy exchange are studied.For the case of a pulsed laser field,it is found that the maximum net energy exchange by NLCS is approximately proportional to Q_(0)^(2)(Q_(0)≡eE_(0)/(meωc))for Q_(0)~>100.In addition,the relative importance of these two mechanisms to the net energy exchange at different intensities is explored.展开更多
基金Supported partially by the National Natural Science Foundation of China under Grant Nos 10475018 and 10335030, the National Key Basic Research Special Foundation （NKBRF） of China under Grant No G1999075200, and the Fudan Innovation Foundation for Graduate Student under Grant No CQH5913002.
文摘Up to third-order temporal correction in terms of a small dimensionless temporal parameter ε=1/（ωoto） （ω0=ck0 the central oscillatory frequency, to the pulse duration of half period）, the field expressions of ultra-short focused laser pulses are explicitly presented. To evaluate the correction efficacy, electric amplitudes of zeroth-order and higher-order corrected fields are compared for different pulse durations. Furthermore, electron interaction with ultra-short laser pulses is simulated using both the zeroth-order and higher-order corrected field equations. Our simulation results show that the third-order correction terms should be considered for investigating the interaction if the laser pulse duration decreases to a few optical periods.
基金Supported in part by the National Natural Science Foundation of China under Grant No.19684001,the National High-Tech ICP Committee in China,and the Science and Technology Funds of the China Academy of Engineering and Physics.
文摘We show that there are two mechanisms responsible for the net energy exchange between an intense pulsed laser and an electron in vacuum,namely,stimulated Compton scattering and nonlinear Compton scattering(NLCS).For NLCS,being the only effect in a mono-frequency continuous laser beam,its contribution is also indepen dently determined.The characteristics of these two mechanisms in connection with the net energy exchange are studied.For the case of a pulsed laser field,it is found that the maximum net energy exchange by NLCS is approximately proportional to Q_(0)^(2)(Q_(0)≡eE_(0)/(meωc))for Q_(0)~>100.In addition,the relative importance of these two mechanisms to the net energy exchange at different intensities is explored.
