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Volume 15
Issue 9
10.3390/app15095056
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This is an early access version, the complete PDF, HTML, and XML versions will be available soon.
Article

The Impact of the Girdle Waist Radius on the Radiation Characteristics of the Relativistic Electron in Cross-Collision with the Tightly Focused Linearly Polarized Laser

by
Junze Shi
1,
Jiachen Li
1,
Yizhang Li
2,
Zekai Yu
1,
Gang Yan
3 and
Youwei Tian
3,*
1
Bell Honors School, Nanjing University of Posts and Telecommunications, Nanjing 210023, China
2
Portland Institute, Nanjing University of Posts and Telecommunications, Nanjing 210023, China
3
College of Science, Nanjing University of Posts and Telecommunications, Nanjing 210023, China
*
Author to whom correspondence should be addressed.
Appl. Sci. 2025, 15(9), 5056; https://doi.org/10.3390/app15095056
Submission received: 27 February 2025 / Revised: 28 April 2025 / Accepted: 1 May 2025 / Published: 1 May 2025
Versions Notes

Abstract

Under the framework of classical electrodynamics, this article investigates the nonlinear Thomson scattering generated by the cross-collision between a tightly focused linearly polarized Gaussian laser pulse and a relativistic electron through numerical simulation and emulation. The oscillation direction and emission angle of the electron’s trajectory are influenced by the beam waist radius and the delay time. The spatial radiation distribution of electrons exhibits a comet-shaped pattern, with the radiation being concentrated in the forward position. This is attributed to the high laser intensity at the focus, resulting in intense electron motion. As the beam waist radius keeps increasing continuously, the maximum radiation polar angle in the spatial distribution decreases. The time spectrum exhibits a symmetrical three-peak structure, with a high secondary peak. Meanwhile, the supercontinuum spectrum gradually transforms into a multi-peak distribution spectrum. In the multi-peak mode, the main peak and the secondary peak will interchange during the increase in the waist radius, generating rays with higher frequencies and energies. The aforementioned research findings reveal a portion of the mechanism of the nonlinear Thomson scattering theory and are beneficial for generating X-rays of higher quality.
Keywords: laser optics; electron radiation; beam waist radius; linearly polarized laser; numerical simulation laser optics; electron radiation; beam waist radius; linearly polarized laser; numerical simulation

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MDPI and ACS Style

Shi, J.; Li, J.; Li, Y.; Yu, Z.; Yan, G.; Tian, Y. The Impact of the Girdle Waist Radius on the Radiation Characteristics of the Relativistic Electron in Cross-Collision with the Tightly Focused Linearly Polarized Laser. Appl. Sci. 2025, 15, 5056. https://doi.org/10.3390/app15095056

AMA Style

Shi J, Li J, Li Y, Yu Z, Yan G, Tian Y. The Impact of the Girdle Waist Radius on the Radiation Characteristics of the Relativistic Electron in Cross-Collision with the Tightly Focused Linearly Polarized Laser. Applied Sciences. 2025; 15(9):5056. https://doi.org/10.3390/app15095056

Chicago/Turabian Style

Shi, Junze, Jiachen Li, Yizhang Li, Zekai Yu, Gang Yan, and Youwei Tian. 2025. "The Impact of the Girdle Waist Radius on the Radiation Characteristics of the Relativistic Electron in Cross-Collision with the Tightly Focused Linearly Polarized Laser" Applied Sciences 15, no. 9: 5056. https://doi.org/10.3390/app15095056

APA Style

Shi, J., Li, J., Li, Y., Yu, Z., Yan, G., & Tian, Y. (2025). The Impact of the Girdle Waist Radius on the Radiation Characteristics of the Relativistic Electron in Cross-Collision with the Tightly Focused Linearly Polarized Laser. Applied Sciences, 15(9), 5056. https://doi.org/10.3390/app15095056

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