Collimated GeV attosecond electron-positron bunches from a plasma channel driven by 10 PW lasers

Xing-Long Zhu, Min Chen, Tong-Pu Yu, Su-Ming Weng, Feng He, Zheng-Ming Sheng

Research output: Contribution to journalArticle

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Abstract

High-energy positrons and bright γ-ray sources are of great importance both in fundamental research and for practical applications. However, collimated GeV electron–positron pair jets and γ-ray flashes are still rarely produced in the laboratory. Here, we demonstrate that by irradiating a near-critical-density plasma channel with two 10 PW-scale laser pulses, highly directional GeV electron–positron pairs and bright γ-ray beams can be efficiently generated. Three-dimensional particle-in-cell simulations show the formation of GeV positron jets with high density (8×1021/ cm3), attosecond duration (400 as), and a divergence angle of 14°. Additionally, ultrabright [2×1025 photons s−1 mm−2 mrad−2 (0.1% bandwidth)−1] collimated attosecond (370 as) γ-ray flashes with a laser energy conversion efficiency of 5.6% are emitted. These features show the significant advantage of using a plasma channel as compared with a uniform plasma and thus open up new possibilities for a wide variety of applications.
Original languageEnglish
Article number014401
Number of pages8
JournalMatter and Radiation at Extremes
Volume4
Issue number1
DOIs
Publication statusPublished - 17 Jan 2019

Fingerprint

Positrons
positrons
rays
Plasmas
Electrons
Lasers
Plasma density
Energy conversion
Conversion efficiency
lasers
flash
Laser pulses
electrons
Bandwidth
energy conversion efficiency
plasma density
divergence
bandwidth
pulses
cells

Keywords

  • high-energy positrons
  • bright γ-ray sources
  • GeV electron–positron pairs
  • particle-in-cell simulations

Cite this

Zhu, Xing-Long ; Chen, Min ; Yu, Tong-Pu ; Weng, Su-Ming ; He, Feng ; Sheng, Zheng-Ming. / Collimated GeV attosecond electron-positron bunches from a plasma channel driven by 10 PW lasers. In: Matter and Radiation at Extremes. 2019 ; Vol. 4, No. 1.
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Collimated GeV attosecond electron-positron bunches from a plasma channel driven by 10 PW lasers. / Zhu, Xing-Long; Chen, Min; Yu, Tong-Pu; Weng, Su-Ming; He, Feng; Sheng, Zheng-Ming.

In: Matter and Radiation at Extremes, Vol. 4, No. 1, 014401, 17.01.2019.

Research output: Contribution to journalArticle

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AU - Chen, Min

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