Collimated ultra-bright gamma-rays from electron wiggling along a petawatt-laser-irradiated wire in the QED regime

Wei-Min Wang, Zheng-Ming Sheng, Paul Gibbon, Li-Ming Chen, Jie Zhang

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

Even though high-quality X and gamma-rays with photon energy below mega-electron-volt (MeV) are available from large scale X-ray free electron lasers and synchrotron radiation facilities, it remains a great challenge to generate bright gamma-rays over ten MeV. Recently, gamma-rays with energies up to MeV level were observed in Compton scattering experiments based on laser wakefield accelerators, but the yield efficiency was as low as 10−6 , owing to low charge of the electron beam. Here, we propose a scheme to efficiently generate gamma-rays of hundreds of MeV from sub-micrometer wires irradiated by petawatt lasers, where electron accelerating and wiggling are achieved simultaneously. The wiggling is caused by the quasistatic electric and magnetic fields induced around the wire surface, and these are so high that even quantum electrodynamics (QED) effects become significant for gamma-ray generation, although the driving lasers are only at the petawatt level. Our full three-dimensional simulations show that directional, ultra-bright gamma-rays are generated, containing 1012 photons between 5 and 500 MeV within 10 femtosecond duration. The brilliance, up to 1027 photons s−1 mrad−2 mm−2 per 0.1% bandwidth at an average photon energy of 20 MeV, is the second only to X-ray free electron lasers, while the photon energy is 3 orders of magnitude higher than the latter. In addition, the gamma-ray yield efficiency approaches 10%, i.e., 5 orders of magnitude higher than the Compton scattering based on laser wakefield accelerators. Such high-energy, ultra-bright, femtosecond-duration gamma-rays may find applications in nuclear photonics, radiotherapy, and laboratory astrophysics.
LanguageEnglish
Pages9911-9916
Number of pages6
JournalProceedings of the National Academy of Sciences
Volume115
Issue number40
DOIs
Publication statusPublished - 17 Sep 2018

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quantum electrodynamics
wire
gamma rays
lasers
electrons
photons
free electron lasers
astrophysics
accelerators
energy
laboratory astrophysics
scattering
micrometers
radiation therapy
synchrotron radiation
x rays
laser beams
photonics
electron beams
bandwidth

Keywords

  • high-energy high-brightness gamma-ray
  • strong field QED process
  • ultra-intense laser matter interaction
  • high energy density

Cite this

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title = "Collimated ultra-bright gamma-rays from electron wiggling along a petawatt-laser-irradiated wire in the QED regime",
abstract = "Even though high-quality X and gamma-rays with photon energy below mega-electron-volt (MeV) are available from large scale X-ray free electron lasers and synchrotron radiation facilities, it remains a great challenge to generate bright gamma-rays over ten MeV. Recently, gamma-rays with energies up to MeV level were observed in Compton scattering experiments based on laser wakefield accelerators, but the yield efficiency was as low as 10−6 , owing to low charge of the electron beam. Here, we propose a scheme to efficiently generate gamma-rays of hundreds of MeV from sub-micrometer wires irradiated by petawatt lasers, where electron accelerating and wiggling are achieved simultaneously. The wiggling is caused by the quasistatic electric and magnetic fields induced around the wire surface, and these are so high that even quantum electrodynamics (QED) effects become significant for gamma-ray generation, although the driving lasers are only at the petawatt level. Our full three-dimensional simulations show that directional, ultra-bright gamma-rays are generated, containing 1012 photons between 5 and 500 MeV within 10 femtosecond duration. The brilliance, up to 1027 photons s−1 mrad−2 mm−2 per 0.1{\%} bandwidth at an average photon energy of 20 MeV, is the second only to X-ray free electron lasers, while the photon energy is 3 orders of magnitude higher than the latter. In addition, the gamma-ray yield efficiency approaches 10{\%}, i.e., 5 orders of magnitude higher than the Compton scattering based on laser wakefield accelerators. Such high-energy, ultra-bright, femtosecond-duration gamma-rays may find applications in nuclear photonics, radiotherapy, and laboratory astrophysics.",
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Collimated ultra-bright gamma-rays from electron wiggling along a petawatt-laser-irradiated wire in the QED regime. / Wang, Wei-Min; Sheng, Zheng-Ming; Gibbon, Paul; Chen, Li-Ming; Zhang, Jie.

In: Proceedings of the National Academy of Sciences , Vol. 115, No. 40, 17.09.2018, p. 9911-9916.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Collimated ultra-bright gamma-rays from electron wiggling along a petawatt-laser-irradiated wire in the QED regime

AU - Wang, Wei-Min

AU - Sheng, Zheng-Ming

AU - Gibbon, Paul

AU - Chen, Li-Ming

AU - Zhang, Jie

PY - 2018/9/17

Y1 - 2018/9/17

N2 - Even though high-quality X and gamma-rays with photon energy below mega-electron-volt (MeV) are available from large scale X-ray free electron lasers and synchrotron radiation facilities, it remains a great challenge to generate bright gamma-rays over ten MeV. Recently, gamma-rays with energies up to MeV level were observed in Compton scattering experiments based on laser wakefield accelerators, but the yield efficiency was as low as 10−6 , owing to low charge of the electron beam. Here, we propose a scheme to efficiently generate gamma-rays of hundreds of MeV from sub-micrometer wires irradiated by petawatt lasers, where electron accelerating and wiggling are achieved simultaneously. The wiggling is caused by the quasistatic electric and magnetic fields induced around the wire surface, and these are so high that even quantum electrodynamics (QED) effects become significant for gamma-ray generation, although the driving lasers are only at the petawatt level. Our full three-dimensional simulations show that directional, ultra-bright gamma-rays are generated, containing 1012 photons between 5 and 500 MeV within 10 femtosecond duration. The brilliance, up to 1027 photons s−1 mrad−2 mm−2 per 0.1% bandwidth at an average photon energy of 20 MeV, is the second only to X-ray free electron lasers, while the photon energy is 3 orders of magnitude higher than the latter. In addition, the gamma-ray yield efficiency approaches 10%, i.e., 5 orders of magnitude higher than the Compton scattering based on laser wakefield accelerators. Such high-energy, ultra-bright, femtosecond-duration gamma-rays may find applications in nuclear photonics, radiotherapy, and laboratory astrophysics.

AB - Even though high-quality X and gamma-rays with photon energy below mega-electron-volt (MeV) are available from large scale X-ray free electron lasers and synchrotron radiation facilities, it remains a great challenge to generate bright gamma-rays over ten MeV. Recently, gamma-rays with energies up to MeV level were observed in Compton scattering experiments based on laser wakefield accelerators, but the yield efficiency was as low as 10−6 , owing to low charge of the electron beam. Here, we propose a scheme to efficiently generate gamma-rays of hundreds of MeV from sub-micrometer wires irradiated by petawatt lasers, where electron accelerating and wiggling are achieved simultaneously. The wiggling is caused by the quasistatic electric and magnetic fields induced around the wire surface, and these are so high that even quantum electrodynamics (QED) effects become significant for gamma-ray generation, although the driving lasers are only at the petawatt level. Our full three-dimensional simulations show that directional, ultra-bright gamma-rays are generated, containing 1012 photons between 5 and 500 MeV within 10 femtosecond duration. The brilliance, up to 1027 photons s−1 mrad−2 mm−2 per 0.1% bandwidth at an average photon energy of 20 MeV, is the second only to X-ray free electron lasers, while the photon energy is 3 orders of magnitude higher than the latter. In addition, the gamma-ray yield efficiency approaches 10%, i.e., 5 orders of magnitude higher than the Compton scattering based on laser wakefield accelerators. Such high-energy, ultra-bright, femtosecond-duration gamma-rays may find applications in nuclear photonics, radiotherapy, and laboratory astrophysics.

KW - high-energy high-brightness gamma-ray

KW - strong field QED process

KW - ultra-intense laser matter interaction

KW - high energy density

UR - http://www.pnas.org/

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DO - 10.1073/pnas.1809649115

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JO - Proceedings of the National Academy of Sciences

T2 - Proceedings of the National Academy of Sciences

JF - Proceedings of the National Academy of Sciences

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