Generation of polarized positron beams via collisions of ultrarelativistic electron beams
A scheme is proposed for generating a polarized positron beam via multiphoton Breit-Wheeler process during the collision of a 10-GeV-level, 20-pC seeding electron beam with a second 10-GeV, multi-nC driving electron beam. The high-density driving beam with the length and transverse size less than 1...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
| Published: |
American Physical Society
2021-09-01
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| Series: | Physical Review Research |
| Online Access: | http://doi.org/10.1103/PhysRevResearch.3.033245 |
| _version_ | 1797210942430248960 |
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| author | Huai-Hang Song Wei-Min Wang Yu-Tong Li |
| author_facet | Huai-Hang Song Wei-Min Wang Yu-Tong Li |
| author_sort | Huai-Hang Song |
| collection | DOAJ |
| description | A scheme is proposed for generating a polarized positron beam via multiphoton Breit-Wheeler process during the collision of a 10-GeV-level, 20-pC seeding electron beam with a second 10-GeV, multi-nC driving electron beam. The high-density driving beam with the length and transverse size less than 1 μm provides a strong self-generated field. The field experienced by the seeding beam can be unipolar by incorporating a proper impact parameter, which is crucial to realizing the positron polarization. We employ semiclassical Monte Carlo simulations to calculate the spin- and polarization-resolved photon emission and electron-positron pair production in the locally constant-field approximation. The simulation results show that a highly polarized positron beam with a polarization degree above 40% can be generated in several femtoseconds, which is robust against the beam parameters. The positron polarization degree can be further increased to 60% provided the seeding beam is initially polarized. |
| first_indexed | 2024-04-24T10:18:36Z |
| format | Article |
| id | doaj.art-965e365fe8764ba0815dabefc09df680 |
| institution | Directory Open Access Journal |
| issn | 2643-1564 |
| language | English |
| last_indexed | 2024-04-24T10:18:36Z |
| publishDate | 2021-09-01 |
| publisher | American Physical Society |
| record_format | Article |
| series | Physical Review Research |
| spelling | doaj.art-965e365fe8764ba0815dabefc09df6802024-04-12T17:13:55ZengAmerican Physical SocietyPhysical Review Research2643-15642021-09-013303324510.1103/PhysRevResearch.3.033245Generation of polarized positron beams via collisions of ultrarelativistic electron beamsHuai-Hang SongWei-Min WangYu-Tong LiA scheme is proposed for generating a polarized positron beam via multiphoton Breit-Wheeler process during the collision of a 10-GeV-level, 20-pC seeding electron beam with a second 10-GeV, multi-nC driving electron beam. The high-density driving beam with the length and transverse size less than 1 μm provides a strong self-generated field. The field experienced by the seeding beam can be unipolar by incorporating a proper impact parameter, which is crucial to realizing the positron polarization. We employ semiclassical Monte Carlo simulations to calculate the spin- and polarization-resolved photon emission and electron-positron pair production in the locally constant-field approximation. The simulation results show that a highly polarized positron beam with a polarization degree above 40% can be generated in several femtoseconds, which is robust against the beam parameters. The positron polarization degree can be further increased to 60% provided the seeding beam is initially polarized.http://doi.org/10.1103/PhysRevResearch.3.033245 |
| spellingShingle | Huai-Hang Song Wei-Min Wang Yu-Tong Li Generation of polarized positron beams via collisions of ultrarelativistic electron beams Physical Review Research |
| title | Generation of polarized positron beams via collisions of ultrarelativistic electron beams |
| title_full | Generation of polarized positron beams via collisions of ultrarelativistic electron beams |
| title_fullStr | Generation of polarized positron beams via collisions of ultrarelativistic electron beams |
| title_full_unstemmed | Generation of polarized positron beams via collisions of ultrarelativistic electron beams |
| title_short | Generation of polarized positron beams via collisions of ultrarelativistic electron beams |
| title_sort | generation of polarized positron beams via collisions of ultrarelativistic electron beams |
| url | http://doi.org/10.1103/PhysRevResearch.3.033245 |
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