Enhancement of chirped density modulation in electron beam for generating ultrashort THz radiation pulse
Ultrashort broadband THz radiation is an essential tool for investigating nonlinear phenomena and other frontier scientific research. Here, we propose a novel scheme that leverages the nonlinear longitudinal space-charge oscillation process to amplify the chirped density modulation amplitude of the...
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| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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American Physical Society
2025-04-01
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| Series: | Physical Review Accelerators and Beams |
| Online Access: | http://doi.org/10.1103/PhysRevAccelBeams.28.044402 |
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| author | Shaohang Ma Haoran Zhang Jian Pang Chao Liu Zhigang He |
| author_facet | Shaohang Ma Haoran Zhang Jian Pang Chao Liu Zhigang He |
| author_sort | Shaohang Ma |
| collection | DOAJ |
| description | Ultrashort broadband THz radiation is an essential tool for investigating nonlinear phenomena and other frontier scientific research. Here, we propose a novel scheme that leverages the nonlinear longitudinal space-charge oscillation process to amplify the chirped density modulation amplitude of the electron beam, which is then utilized to generate ultrashort THz radiation. In this scheme, by controlling the charge density during the beam transport process, the initial chirped density modulation is converted into current peaks with higher amplitude, thereby enabling subsequent ultrashort broadband THz radiation in an optimally tapered undulator. We analyze the key parameters affecting nonlinear longitudinal oscillations of the electron beam with initial chirped density modulation. Furthermore, simulation results verify the feasibility of enhancing the chirped density modulation via the space-charge oscillation. It shows the generation of a microbunched electron beam with a peak current exceeding 370 A, while maintaining the chirped characteristics of the density modulation. Consequently, ultrashort broadband radiation with a full width at half maximum pulse duration of 250 fs and a frequency range covering 1.5 to 5 THz can be produced in the subsequent undulator. |
| format | Article |
| id | doaj-art-c5fddbd8b2e245ee92e69b67fa0227be |
| institution | Kabale University |
| issn | 2469-9888 |
| language | English |
| publishDate | 2025-04-01 |
| publisher | American Physical Society |
| record_format | Article |
| series | Physical Review Accelerators and Beams |
| spelling | doaj-art-c5fddbd8b2e245ee92e69b67fa0227be2025-08-20T03:53:22ZengAmerican Physical SocietyPhysical Review Accelerators and Beams2469-98882025-04-0128404440210.1103/PhysRevAccelBeams.28.044402Enhancement of chirped density modulation in electron beam for generating ultrashort THz radiation pulseShaohang MaHaoran ZhangJian PangChao LiuZhigang HeUltrashort broadband THz radiation is an essential tool for investigating nonlinear phenomena and other frontier scientific research. Here, we propose a novel scheme that leverages the nonlinear longitudinal space-charge oscillation process to amplify the chirped density modulation amplitude of the electron beam, which is then utilized to generate ultrashort THz radiation. In this scheme, by controlling the charge density during the beam transport process, the initial chirped density modulation is converted into current peaks with higher amplitude, thereby enabling subsequent ultrashort broadband THz radiation in an optimally tapered undulator. We analyze the key parameters affecting nonlinear longitudinal oscillations of the electron beam with initial chirped density modulation. Furthermore, simulation results verify the feasibility of enhancing the chirped density modulation via the space-charge oscillation. It shows the generation of a microbunched electron beam with a peak current exceeding 370 A, while maintaining the chirped characteristics of the density modulation. Consequently, ultrashort broadband radiation with a full width at half maximum pulse duration of 250 fs and a frequency range covering 1.5 to 5 THz can be produced in the subsequent undulator.http://doi.org/10.1103/PhysRevAccelBeams.28.044402 |
| spellingShingle | Shaohang Ma Haoran Zhang Jian Pang Chao Liu Zhigang He Enhancement of chirped density modulation in electron beam for generating ultrashort THz radiation pulse Physical Review Accelerators and Beams |
| title | Enhancement of chirped density modulation in electron beam for generating ultrashort THz radiation pulse |
| title_full | Enhancement of chirped density modulation in electron beam for generating ultrashort THz radiation pulse |
| title_fullStr | Enhancement of chirped density modulation in electron beam for generating ultrashort THz radiation pulse |
| title_full_unstemmed | Enhancement of chirped density modulation in electron beam for generating ultrashort THz radiation pulse |
| title_short | Enhancement of chirped density modulation in electron beam for generating ultrashort THz radiation pulse |
| title_sort | enhancement of chirped density modulation in electron beam for generating ultrashort thz radiation pulse |
| url | http://doi.org/10.1103/PhysRevAccelBeams.28.044402 |
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