Abstract
Based on Thomson scattering classical theory and single electron model, numerical simulation of Thomson scattering X-ray source is completed with the help of MATLAB software. We discuss the influence of waist radius and initial phase of few-cycle laser pulse on maximum radiation energy, maximum radiation power, radiation angle distribution and spectrum when the collision center is at or away from the focus. It is found that the initial z-axis position of the electron has no effect on the overall change trend. The influence ability of waist radius appears a “watershed” phenomenon at \({b}_{0}=4{\lambda }_{0}\). When \({b}_{0}=1\sim 3{\lambda }_{0}\), with the increase in the waist radius, the maximum radiation energy and the maximum radiation power increase, and the collimation of laser and the monochromaticity of the spectrum become worse. When \({b}_{0}\ge 4{\lambda }_{0}\), the change in waist radius has no effect on these parameters. In addition, when the initial phase of few-cycle laser pulse increases in the range of 0–360°, the maximum radiation direction rotates counterclockwise, and the values of the maximum radiation energy and the instantaneous power of the maximum radiation energy and the peak value of the spectrum fluctuate only in a small range.
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Acknowledgements
This work has been supported by the National Natural Sciences Foundation of China under Grant Nos. 10947170/A05 and 11104291, Natural Science Fund for Colleges and Universities in Jiangsu Province under Grant No. 10KJB140006, Natural Sciences Foundation of Shanghai under Grant No. 11ZR1441300 and Natural Science Foundation of Nanjing University of Posts and Telecommunications under Grant No. NY221098 and sponsored by Jiangsu Qing Lan Project and STITP Project under Grant No. 202210293150Y.
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Xia, L., Yuan, Y., Zhu, S. et al. Nonlinear Thomson scattering radiation characteristics of strong focusing circular polarization laser pulses with different waist radius and initial phase. J Opt 53, 482–492 (2024). https://doi.org/10.1007/s12596-023-01215-9
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DOI: https://doi.org/10.1007/s12596-023-01215-9