1
|
Song H, Kim CM, Won J, Song J, Lee S, Ryu CM, Bang W, Nam CH. Characterization of relativistic electron-positron beams produced with laser-accelerated GeV electrons. Sci Rep 2023; 13:310. [PMID: 36609530 PMCID: PMC9823095 DOI: 10.1038/s41598-023-27617-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2022] [Accepted: 01/04/2023] [Indexed: 01/09/2023] Open
Abstract
The characterization of an electron-positron beam generated from the interaction of a multi-GeV electron beam with a lead plate is performed using GEANT4 simulations. The dependence of the positron beam size on driver electron beam energy and lead converter thickness is investigated in detail. A pancake-like positron beam structure is generated with a monoenergetic multi-GeV driver electron beam, with the results indicating that a 5 GeV driver electron beam with 1 nC charge can generate a positron beam with a density of 1015-1016 cm-3 at one radiation length of lead. In addition, we find that electron-positron beams generated using above-GeV electron beams have neutralities greater than 0.3 at one radiation length of lead, whereas neutralities of 0.2 are observed when using a 200 MeV electron beam. The possibility of observing plasma instabilities in experiments is also examined by comparing the plasma skin depth with the electron-positron beam size. A quasi-neutral electron-positron plasma can be produced in the interaction between a 1 nC, 5 GeV electron beam and lead with a thickness of five radiation lengths. Our findings will aid in analyzing and interpreting laser-produced electron-positron plasma for laboratory astrophysics research.
Collapse
Affiliation(s)
- Hoon Song
- grid.410720.00000 0004 1784 4496Center for Relativistic Laser Science, Institute for Basic Science (IBS), Gwangju, 61005 Korea ,grid.61221.360000 0001 1033 9831Department of Physics and Photon Science, GIST, Gwangju, 61005 Korea
| | - Chul Min Kim
- grid.410720.00000 0004 1784 4496Center for Relativistic Laser Science, Institute for Basic Science (IBS), Gwangju, 61005 Korea ,grid.61221.360000 0001 1033 9831Advanced Photonics Research Institute, GIST, Gwangju, 61005 Korea
| | - Junho Won
- grid.410720.00000 0004 1784 4496Center for Relativistic Laser Science, Institute for Basic Science (IBS), Gwangju, 61005 Korea ,grid.61221.360000 0001 1033 9831Department of Physics and Photon Science, GIST, Gwangju, 61005 Korea
| | - Jaehyun Song
- grid.410720.00000 0004 1784 4496Center for Relativistic Laser Science, Institute for Basic Science (IBS), Gwangju, 61005 Korea ,grid.61221.360000 0001 1033 9831Department of Physics and Photon Science, GIST, Gwangju, 61005 Korea
| | - Seongmin Lee
- grid.410720.00000 0004 1784 4496Center for Relativistic Laser Science, Institute for Basic Science (IBS), Gwangju, 61005 Korea ,grid.61221.360000 0001 1033 9831Department of Physics and Photon Science, GIST, Gwangju, 61005 Korea
| | - Chang-Mo Ryu
- grid.410720.00000 0004 1784 4496Center for Relativistic Laser Science, Institute for Basic Science (IBS), Gwangju, 61005 Korea
| | - Woosuk Bang
- grid.410720.00000 0004 1784 4496Center for Relativistic Laser Science, Institute for Basic Science (IBS), Gwangju, 61005 Korea ,grid.61221.360000 0001 1033 9831Department of Physics and Photon Science, GIST, Gwangju, 61005 Korea
| | - Chang Hee Nam
- grid.410720.00000 0004 1784 4496Center for Relativistic Laser Science, Institute for Basic Science (IBS), Gwangju, 61005 Korea ,grid.61221.360000 0001 1033 9831Department of Physics and Photon Science, GIST, Gwangju, 61005 Korea
| |
Collapse
|