典型文献
Bright-γ-ray source with large orbital angular momentum from the laser near-critical-plasma interaction
文献摘要：
We propose a new laser-plasma-based method to generate bright γ-rays carrying large orbital angular momentum by interacting a circularly polarized Laguerre-Gaussian laser pulse with a near-critical hydrogen plasma confined in an over-dense solid tube.In the first stage of the interaction,it is found via fully relativistic three-dimensional particle-in-cell simulations that high-energy helical electron beams with large orbital angular momentum are generated.In the second stage,this electron beam interacts with the laser pulse reflected from the plasma disc behind the solid tube,and helical γ beams are generated with the same topological structure as the electron beams.The results show that the electrons receive angular momentum from the drive laser,which can be further transferred to the γ photons during the interaction.The γ beam orbital angular momentum is strongly dependent on the laser topological charge l and laser intensity ao,which scales as Lγ∝ a04.A short(duration of 5 fs)isolated helical γ beam with an angular momentum of-3.3×10-14 kg m2s-1 is generated using the Laguerre-Gaussian laser pulse with l=2.The peak brightness of the helical γ beam reaches 1.22×1024 photons s-1 mm-2 mrad-2 per 0.1％BW(at 10 MeV),and the laser-to-γ-ray angular momentum conversion rate is approximately 2.1％.
文献关键词：
中图分类号：
作者姓名：
Mamat Ali BAKE;Suo TANG;Baisong XIE
作者机构：
Xinjiang Key Laboratory of Solid State Physics and Devices,Xinjiang University,Urumqi 830046,People's Republic of China;School of Physics Science and Technology,Xinjiang University,Urumqi 830046,People's Republic of China;Key Laboratory of Beam Technology of the Ministry of Education,and College of Nuclear Science and Technology,Beijing Normal University,Beijing 100875,People's Republic of China;College of Physics and Optoelectronic Engineering,Ocean University of China,Qingdao 266100,People's Republic of China
文献出处：
引用格式：
[1]Mamat Ali BAKE;Suo TANG;Baisong XIE-.Bright-γ-ray source with large orbital angular momentum from the laser near-critical-plasma interaction)[J].等离子体科学和技术（英文版）,2022(09):15-23
A类：
a04,m2s
B类：
Bright,source,large,orbital,angular,momentum,from,laser,near,critical,plasma,interaction,We,propose,new,method,rays,carrying,by,interacting,circularly,polarized,Laguerre,Gaussian,pulse,hydrogen,confined,over,dense,solid,tube,In,first,stage,found,via,fully,relativistic,three,dimensional,particle,cell,simulations,that,high,energy,helical,beams,are,generated,second,this,interacts,reflected,disc,behind,same,topological,structure,results,show,electrons,receive,drive,which,can,further,transferred,photons,during,strongly,dependent,charge,intensity,ao,scales,short,duration,fs,isolated,using,peak,brightness,reaches,mrad,per,BW,MeV,conversion,approximately
AB值：
0.474076
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