Abstract
The nonlinear Thomson scattering of a relativistic electron with an intense laser pulse is calculated numerically. The results show that an ultrashort x-ray pulse can be generated by an electron with an initial energy of 5 MeV propagating across a circularly polarized laser pulse with a duration of 8 femtosecond and an intensity of about $1.1\ifmmode\times\else\texttimes\fi{}{10}^{21}\text{ }\text{ }\mathrm{W}/{\mathrm{cm}}^{2}$, when the detection direction is perpendicular to the propagation directions of both the electron and the laser beam. The optimal values of the carrier-envelop phase and the intensity of the laser pulse for the generation of a single ultrashort x-ray pulse are obtained and verified by our calculations of the radiation characteristics.
Highlights
Thomson scattering is a well-known phenomenon in laser-plasma interactions
We show that a single ultrashort x-ray pulse can be generated by an electron with an initial energy of 5 MeV propagating across a circularly polarized laser pulse with a pulse duration of 8 femtosecond and an intensity of about 1:1 Â 1021 W=cm2, when the detection direction is perpendicular to the propagation directions of both the electron and laser beam
The radiation characteristics of nonlinear Thomson scattering with various laser and electron parameters are investigated
Summary
Thomson scattering is a well-known phenomenon in laser-plasma interactions. In the low laser intensity limit, the motion of an electron initially at rest is nonrelativistic and the impact of the magnetic field can be neglected. It was shown that an attosecond pulse train with photon energies ranging from 100 to 600 eV can be generated by an electron in the laser field with a duration of 20 femtosecond and an intensity of 1020 W=cm. It was proposed that a single attosecond x-ray pulse can be generated by two counterpropagating circularly polarized laser pulses with durations of about 1.5 laser cycles [21]. We show that a single ultrashort x-ray pulse can be generated by an electron with an initial energy of 5 MeV propagating across a circularly polarized laser pulse with a pulse duration of 8 femtosecond and an intensity of about 1:1 Â 1021 W=cm, when the detection direction is perpendicular to the propagation directions of both the electron and laser beam. The effects of the carrierenvelop phase and the intensity of the laser pulse on the dynamics and radiation characteristics of the electron are discussed
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