Study of achromatic beamline design for laser-driven femtosecond electron beams
BackgroundThe electron beams produced by laser plasma acceleration have excellent quality for pulse lengths of the order of fs. Due to the existence of a strong laser field, there are difficulties in direct applications, and more applications need to transmit the electron beams to the application te...
| Main Authors: | , , , , , , , |
|---|---|
| Format: | Article |
| Language: | zho |
| Published: |
Science Press
2023-02-01
|
| Series: | He jishu |
| Subjects: | |
| Online Access: | http://www.hjs.sinap.ac.cn/thesisDetails#10.11889/j.0253-3219.2023.hjs.46.020201&lang=zh |
| _version_ | 1797901680480616448 |
|---|---|
| author | ZHU Jungao LU Haiyang ZHAO Yuan LAI Meifu GU Yongli XU Shixiang WEN Meng ZHOU Cangtao |
| author_facet | ZHU Jungao LU Haiyang ZHAO Yuan LAI Meifu GU Yongli XU Shixiang WEN Meng ZHOU Cangtao |
| author_sort | ZHU Jungao |
| collection | DOAJ |
| description | BackgroundThe electron beams produced by laser plasma acceleration have excellent quality for pulse lengths of the order of fs. Due to the existence of a strong laser field, there are difficulties in direct applications, and more applications need to transmit the electron beams to the application terminal. The energy spread leads to the generation of energy chirp of the electron beam in the transmission.PurposeThis study aims to explore the design of the beam optics to compress the pulse length and keep it on the fs scale.MethodsAn achromatic beamline consisting of bending magnets and quadrupole magnets was designed to compress the pulse length of electron beams. Critical parameters of an achromatic beamline were given by a derived formula. Transformation matrix was employed to investigate the differences of the pulse lengths in achromatic transmission and non-achromatic transmission. The pulse lengths of electron beams with different energies were scanned with different deflection angles (0.3 rad, 0.6 rad, 0.9 rad) and deflection radii (0.15 m, 0.25 m, 0.35 m) to study the influence of beamline parameters. Finally, the magnetic field gradients of the quadrupole lens were adjusted to realize the compression of electron beams with different energies in a beamline.ResultsComparing to non-achromatic transmission, the pulse lengths of electrons with the same energy and different initial divergence angles can be compressed effectively in the achromatic beamline. The larger the deflection angle or the deflection radius, the longer the pulse duration of the electron beam with higher energy (>25 MeV). By adjusting the magnetic field gradients of the quadrupole lens, the pulse lengths can be reduced from more than 100 fs to around 20 fs at higher energies.ConclusionsUsing a fixed-size achromatic beamline, combined with magnetic field strength adjustment, the pulse lengths of electron beams with different energies can be kept on the order of fs after transmission. |
| first_indexed | 2024-04-10T09:05:41Z |
| format | Article |
| id | doaj.art-95ef8d348cc240c3ba34bbf52a86526b |
| institution | Directory Open Access Journal |
| issn | 0253-3219 |
| language | zho |
| last_indexed | 2024-04-10T09:05:41Z |
| publishDate | 2023-02-01 |
| publisher | Science Press |
| record_format | Article |
| series | He jishu |
| spelling | doaj.art-95ef8d348cc240c3ba34bbf52a86526b2023-02-21T07:23:08ZzhoScience PressHe jishu0253-32192023-02-0146202020102020110.11889/j.0253-3219.2023.hjs.46.0202010253-3219（2023）02-0025-08Study of achromatic beamline design for laser-driven femtosecond electron beamsZHU Jungao0LU Haiyang1ZHAO Yuan2LAI Meifu3GU Yongli4XU Shixiang5WEN Meng6ZHOU Cangtao7College of Applied Sciences, Shenzhen University, Shenzhen 518060, ChinaShenzhen Key Laboratory of Ultraintense Laser and Advanced Material Technology, Center for Advanced Material Diagnostic Technology, College of Engineering Physics, Shenzhen Technology University, Shenzhen 518118, ChinaShenzhen Key Laboratory of Ultraintense Laser and Advanced Material Technology, Center for Advanced Material Diagnostic Technology, College of Engineering Physics, Shenzhen Technology University, Shenzhen 518118, ChinaShenzhen Key Laboratory of Ultraintense Laser and Advanced Material Technology, Center for Advanced Material Diagnostic Technology, College of Engineering Physics, Shenzhen Technology University, Shenzhen 518118, ChinaShenzhen Key Laboratory of Ultraintense Laser and Advanced Material Technology, Center for Advanced Material Diagnostic Technology, College of Engineering Physics, Shenzhen Technology University, Shenzhen 518118, ChinaShenzhen Key Lab of Micro-Nano Photonic Information Technology, Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province, College of Physics and Optoelectronic Engineering, Shenzhen University, Shenzhen 518060, ChinaDepartment of Physics, Hubei University, Wuhan 430062, ChinaShenzhen Key Laboratory of Ultraintense Laser and Advanced Material Technology, Center for Advanced Material Diagnostic Technology, College of Engineering Physics, Shenzhen Technology University, Shenzhen 518118, ChinaBackgroundThe electron beams produced by laser plasma acceleration have excellent quality for pulse lengths of the order of fs. Due to the existence of a strong laser field, there are difficulties in direct applications, and more applications need to transmit the electron beams to the application terminal. The energy spread leads to the generation of energy chirp of the electron beam in the transmission.PurposeThis study aims to explore the design of the beam optics to compress the pulse length and keep it on the fs scale.MethodsAn achromatic beamline consisting of bending magnets and quadrupole magnets was designed to compress the pulse length of electron beams. Critical parameters of an achromatic beamline were given by a derived formula. Transformation matrix was employed to investigate the differences of the pulse lengths in achromatic transmission and non-achromatic transmission. The pulse lengths of electron beams with different energies were scanned with different deflection angles (0.3 rad, 0.6 rad, 0.9 rad) and deflection radii (0.15 m, 0.25 m, 0.35 m) to study the influence of beamline parameters. Finally, the magnetic field gradients of the quadrupole lens were adjusted to realize the compression of electron beams with different energies in a beamline.ResultsComparing to non-achromatic transmission, the pulse lengths of electrons with the same energy and different initial divergence angles can be compressed effectively in the achromatic beamline. The larger the deflection angle or the deflection radius, the longer the pulse duration of the electron beam with higher energy (>25 MeV). By adjusting the magnetic field gradients of the quadrupole lens, the pulse lengths can be reduced from more than 100 fs to around 20 fs at higher energies.ConclusionsUsing a fixed-size achromatic beamline, combined with magnetic field strength adjustment, the pulse lengths of electron beams with different energies can be kept on the order of fs after transmission.http://www.hjs.sinap.ac.cn/thesisDetails#10.11889/j.0253-3219.2023.hjs.46.020201&lang=zhlaser accelerationelectron beam transmissionelectron beam applicationultrafast |
| spellingShingle | ZHU Jungao LU Haiyang ZHAO Yuan LAI Meifu GU Yongli XU Shixiang WEN Meng ZHOU Cangtao Study of achromatic beamline design for laser-driven femtosecond electron beams He jishu laser acceleration electron beam transmission electron beam application ultrafast |
| title | Study of achromatic beamline design for laser-driven femtosecond electron beams |
| title_full | Study of achromatic beamline design for laser-driven femtosecond electron beams |
| title_fullStr | Study of achromatic beamline design for laser-driven femtosecond electron beams |
| title_full_unstemmed | Study of achromatic beamline design for laser-driven femtosecond electron beams |
| title_short | Study of achromatic beamline design for laser-driven femtosecond electron beams |
| title_sort | study of achromatic beamline design for laser driven femtosecond electron beams |
| topic | laser acceleration electron beam transmission electron beam application ultrafast |
| url | http://www.hjs.sinap.ac.cn/thesisDetails#10.11889/j.0253-3219.2023.hjs.46.020201&lang=zh |
| work_keys_str_mv | AT zhujungao studyofachromaticbeamlinedesignforlaserdrivenfemtosecondelectronbeams AT luhaiyang studyofachromaticbeamlinedesignforlaserdrivenfemtosecondelectronbeams AT zhaoyuan studyofachromaticbeamlinedesignforlaserdrivenfemtosecondelectronbeams AT laimeifu studyofachromaticbeamlinedesignforlaserdrivenfemtosecondelectronbeams AT guyongli studyofachromaticbeamlinedesignforlaserdrivenfemtosecondelectronbeams AT xushixiang studyofachromaticbeamlinedesignforlaserdrivenfemtosecondelectronbeams AT wenmeng studyofachromaticbeamlinedesignforlaserdrivenfemtosecondelectronbeams AT zhoucangtao studyofachromaticbeamlinedesignforlaserdrivenfemtosecondelectronbeams |