Dense GeV electron–positron pairs generated by lasers in near-critical-density plasmas

Xing-Long Zhu, Tong-Pu Yu, Zheng-Ming Sheng, Yan Yin, Ion Cristian Edmond Turcu, Alexander Pukhov

Research output: Contribution to journalArticle

45 Citations (Scopus)

Abstract

Pair production can be triggered by high intensity lasers via the Breit-Wheeler process. However, the straightforward laser-laser colliding for copious numbers of pair creation requires light intensities several orders of magnitude higher than possible with the ongoing laser facilities. Despite the numerous proposed approaches, creating high-energy-density pair plasmas in laboratories is still challenging. Here we present an all-optical scheme for overdense pair production by two counter-propagating lasers irradiating near-critical-density plasmas at only ~1022W cm-2. In this scheme, bright γ-rays are generated by radiation-trapped electrons oscillating in the laser fields. The dense γ-photons then collide with the focused counter-propagating lasers to initiate the multi-photon Breit-Wheeler process. Particle-in-cell simulations indicate that one may generate a high-yield (1.05×1011) overdense (4×1022 cm-3 ) GeV positron beam using 10 PW scale lasers. Such a bright pair source has many practical applications and could be basis for future compact high luminosity electron-positron colliders.
LanguageEnglish
Article number13686
JournalNature Communications
Volume7
DOIs
Publication statusPublished - 14 Dec 2016

Fingerprint

electron-positron pairs
Plasma density
Positrons
plasma density
Lasers
Electrons
lasers
pair production
Photons
positrons
counters
photons
Gamma Rays
Colliding beam accelerators
high power lasers
luminous intensity
Gamma rays
electrons
flux density
Luminance

Keywords

  • pair production
  • electron-positron pairs
  • high intensity lasers
  • Breit-Wheeler process
  • particle-in-cell simulations
  • counter-propagating lasers

Cite this

Zhu, Xing-Long ; Yu, Tong-Pu ; Sheng, Zheng-Ming ; Yin, Yan ; Turcu, Ion Cristian Edmond ; Pukhov, Alexander. / Dense GeV electron–positron pairs generated by lasers in near-critical-density plasmas. In: Nature Communications. 2016 ; Vol. 7.
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Dense GeV electron–positron pairs generated by lasers in near-critical-density plasmas. / Zhu, Xing-Long ; Yu, Tong-Pu; Sheng, Zheng-Ming; Yin, Yan; Turcu, Ion Cristian Edmond; Pukhov, Alexander.

In: Nature Communications, Vol. 7, 13686, 14.12.2016.

Research output: Contribution to journalArticle

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