{"title":"两束超相对论电子束碰撞产生的偏振γ-光子束","authors":"Zhe Gao, Wei-Min Wang","doi":"10.1103/physreva.110.013502","DOIUrl":null,"url":null,"abstract":"Many studies have shown that high-energy <math xmlns=\"http://www.w3.org/1998/Math/MathML\"><mi>γ</mi></math>-photon beams can be efficiently generated via nonlinear Compton scattering driven by laser pulses with intensities greater than <math xmlns=\"http://www.w3.org/1998/Math/MathML\"><mrow><msup><mn>10</mn><mn>22</mn></msup><mspace width=\"0.28em\"></mspace><mrow><mi mathvariant=\"normal\">W</mi><mo>/</mo><msup><mi>cm</mi><mn>2</mn></msup></mrow></mrow></math> recently available in laboratories. Here we propose a laserless scheme to efficiently generate high-energy polarized <math xmlns=\"http://www.w3.org/1998/Math/MathML\"><mi>γ</mi></math>-photon beams by collision of two ultrarelativistic electron beams. The self-generated field of a dense driving electron beam provides a strong deflection field for the other ultrarelativistic seeding electron beam. A QED Monte Carlo code based on the locally constant field approximation is employed to simulate the collision process, and the polarization properties of the <math xmlns=\"http://www.w3.org/1998/Math/MathML\"><mi>γ</mi></math> photons produced are investigated. The simulation results and theoretical analysis indicate that the photon polarization, including both linear and circular polarizations, can be tuned by changing the initial polarization of the seeding beam. If an unpolarized seeding beam is used, linearly polarized photons with an average polarization of 55% can be obtained. If the seeding beam is transversely (longitudinally) polarized, the linear (circular) polarization of photons above 3 GeV can reach 90% (67%), which is favorable for highly polarized, high-energy <math xmlns=\"http://www.w3.org/1998/Math/MathML\"><mi>γ</mi></math>-photon sources.","PeriodicalId":20146,"journal":{"name":"Physical Review A","volume":null,"pages":null},"PeriodicalIF":2.9000,"publicationDate":"2024-07-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Polarized γ-photon beams produced by collision of two ultrarelativistic electron beams\",\"authors\":\"Zhe Gao, Wei-Min Wang\",\"doi\":\"10.1103/physreva.110.013502\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"Many studies have shown that high-energy <math xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"><mi>γ</mi></math>-photon beams can be efficiently generated via nonlinear Compton scattering driven by laser pulses with intensities greater than <math xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"><mrow><msup><mn>10</mn><mn>22</mn></msup><mspace width=\\\"0.28em\\\"></mspace><mrow><mi mathvariant=\\\"normal\\\">W</mi><mo>/</mo><msup><mi>cm</mi><mn>2</mn></msup></mrow></mrow></math> recently available in laboratories. Here we propose a laserless scheme to efficiently generate high-energy polarized <math xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"><mi>γ</mi></math>-photon beams by collision of two ultrarelativistic electron beams. The self-generated field of a dense driving electron beam provides a strong deflection field for the other ultrarelativistic seeding electron beam. A QED Monte Carlo code based on the locally constant field approximation is employed to simulate the collision process, and the polarization properties of the <math xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"><mi>γ</mi></math> photons produced are investigated. The simulation results and theoretical analysis indicate that the photon polarization, including both linear and circular polarizations, can be tuned by changing the initial polarization of the seeding beam. If an unpolarized seeding beam is used, linearly polarized photons with an average polarization of 55% can be obtained. If the seeding beam is transversely (longitudinally) polarized, the linear (circular) polarization of photons above 3 GeV can reach 90% (67%), which is favorable for highly polarized, high-energy <math xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"><mi>γ</mi></math>-photon sources.\",\"PeriodicalId\":20146,\"journal\":{\"name\":\"Physical Review A\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":2.9000,\"publicationDate\":\"2024-07-03\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Physical Review A\",\"FirstCategoryId\":\"101\",\"ListUrlMain\":\"https://doi.org/10.1103/physreva.110.013502\",\"RegionNum\":2,\"RegionCategory\":\"物理与天体物理\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q2\",\"JCRName\":\"Physics and Astronomy\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Physical Review A","FirstCategoryId":"101","ListUrlMain":"https://doi.org/10.1103/physreva.110.013502","RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"Physics and Astronomy","Score":null,"Total":0}
Polarized γ-photon beams produced by collision of two ultrarelativistic electron beams
Many studies have shown that high-energy -photon beams can be efficiently generated via nonlinear Compton scattering driven by laser pulses with intensities greater than recently available in laboratories. Here we propose a laserless scheme to efficiently generate high-energy polarized -photon beams by collision of two ultrarelativistic electron beams. The self-generated field of a dense driving electron beam provides a strong deflection field for the other ultrarelativistic seeding electron beam. A QED Monte Carlo code based on the locally constant field approximation is employed to simulate the collision process, and the polarization properties of the photons produced are investigated. The simulation results and theoretical analysis indicate that the photon polarization, including both linear and circular polarizations, can be tuned by changing the initial polarization of the seeding beam. If an unpolarized seeding beam is used, linearly polarized photons with an average polarization of 55% can be obtained. If the seeding beam is transversely (longitudinally) polarized, the linear (circular) polarization of photons above 3 GeV can reach 90% (67%), which is favorable for highly polarized, high-energy -photon sources.
期刊介绍:
Physical Review A (PRA) publishes important developments in the rapidly evolving areas of atomic, molecular, and optical (AMO) physics, quantum information, and related fundamental concepts.
PRA covers atomic, molecular, and optical physics, foundations of quantum mechanics, and quantum information, including:
-Fundamental concepts
-Quantum information
-Atomic and molecular structure and dynamics; high-precision measurement
-Atomic and molecular collisions and interactions
-Atomic and molecular processes in external fields, including interactions with strong fields and short pulses
-Matter waves and collective properties of cold atoms and molecules
-Quantum optics, physics of lasers, nonlinear optics, and classical optics