Abstract：
:We show a new resonance acceleration scheme for generating ultradense relativistic electron bunches in helical motions and hence emitting brilliant vortical γ-ray pulses in the quantum electrodynamic (QED) regime of circularly-polarized (CP) laser-plasma interactions. Here the combined effects of the radiation reaction recoil force and the self-generated magnetic fields result in not only trapping of a great amount of electrons in laser-produced plasma channel, but also significant broadening of the resonance bandwidth between laser frequency and that of electron betatron oscillation in the channel, which eventually leads to formation of the ultradense electron bunch under resonant helical motion in CP laser fields. Three-dimensional PIC simulations show that a brilliant γ-ray pulse with unprecedented power of 6.7 PW and peak brightness of 1025 photons/s/mm2/mrad2/0.1% BW (at 15 MeV) is emitted at laser intensity of 1.9 × 1023 W/cm2.
journal_name
Sci Repjournal_title
Scientific reportsauthors
Chang HX,Qiao B,Huang TW,Xu Z,Zhou CT,Gu YQ,Yan XQ,Zepf M,He XTdoi
10.1038/srep45031subject
Has Abstractpub_date
2017-03-24 00:00:00pages
45031issn
2045-2322pii
srep45031journal_volume
7pub_type
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