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Two-stage γ ray emission via ultrahigh intensity laser pulse interaction with a laser wakefield accelerated electron beam
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作者 Mamat Ali BAKE aynisa tursun +1 位作者 Aimierding AIMIDULA Baisong XIE 《Plasma Science and Technology》 SCIE EI CAS CSCD 2020年第10期76-85,共10页
In this study, we investigate the generation of twin γ ray beams in the collision of an ultrahigh intensity laser pulse with a laser wakefield accelerated electron beam using a particle-in-cell simulation. We conside... In this study, we investigate the generation of twin γ ray beams in the collision of an ultrahigh intensity laser pulse with a laser wakefield accelerated electron beam using a particle-in-cell simulation. We consider the composed target of a homogeneous underdense preplasma in front of an ultrathin solid foil. The electrons in the preplasma are trapped and accelerated by the wakefield. When the laser pulse is reflected by the thin solid foil, the wakefield accelerated electrons continue to move forward and pass through the foil almost without influence from the reflected laser pulse or foil. Consequently, two groups of γ ray flashes, with tunable time delay and energy, are generated by the wakefield accelerated electron beam interacting with the reflected laser pulse from the foil as well as another counter-propagating petawatt laser pulse behind the foil. Additionally, we study the dependence of the γ photon emission on the preplasma densities, driving laser polarization, and solid foil. 展开更多
关键词 laser plasma interaction wakefield acceleration γray emission particle-in-cell(PIC)simulation
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激光等离子体相互作用中量子电动力学效应对激光能量吸收的影响
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作者 阿依妮萨·图尔荪 买买提艾力·巴克 阿不都热苏力·阿不都热西提 《激光杂志》 北大核心 2020年第3期48-51,共4页
为了研究强激光与等离子体相互作用中的量子电动力学(QED)效应对激光能量吸收的影响,用理论方法对强度为I>10^22wcm^-2、反方向传播的两束圆极化强激光与等离子体固体靶相互作用过程进行研究。探讨经典和QED情况下的辐射阻尼效应对... 为了研究强激光与等离子体相互作用中的量子电动力学(QED)效应对激光能量吸收的影响,用理论方法对强度为I>10^22wcm^-2、反方向传播的两束圆极化强激光与等离子体固体靶相互作用过程进行研究。探讨经典和QED情况下的辐射阻尼效应对激光能量吸收的影响。结果表明,在QED情况下,在相互作用过程中能够产生高能电子和高能辐射。这些高能电子集体振荡过程中的辐射阻尼导致激光能量的强吸收。QED情况比经典情况具有更好的实际应用价值。 展开更多
关键词 激光能量吸收 等离子体 量子电动力学 辐射阻尼
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Ultrabright γ-ray emission from the interaction of an intense laser pulse with a near-critical-density plasma
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作者 aynisa tursun Mamat Ali Bake +2 位作者 Baisong Xie Yasheng Niyazi Abuduresuli Abudurexiti 《Chinese Physics B》 SCIE EI CAS CSCD 2021年第11期419-429,共11页
An efficient scheme for generating ultrabright γ-rays from the interaction of an intense laser pulse with a near-criticaldensity plasma is studied by using the two-dimensional particle-in-cell simulation including qu... An efficient scheme for generating ultrabright γ-rays from the interaction of an intense laser pulse with a near-criticaldensity plasma is studied by using the two-dimensional particle-in-cell simulation including quantum electrodynamic effects.We investigate the effects of target shape on γ-ray generation efficiency using three configurations of the solid foils attached behind the near-critical-density plasma:a flat foil without a channel(target 1),a flat foil with a channel(target 2),and a convex foil with a channel(target 3).When an intense laser propagates in a near-critical-density plasma,a large number of electrons are trapped and accelerated to GeV energy,and emit γ-rays via nonlinear betatron oscillation in the first stage.In the second stage,the accelerated electrons collide with the laser pulse reflected from the foil and emit high-energy,high-density γ-rays via nonlinear Compton scattering.The simulation results show that compared with the other two targets,target 3 affords better focusing of the laser field and electrons,which decreases the divergence angle of g-photons.Consequently,denser and brighter γ-rays are emitted when target 3 is used.Specifically,a dense γ-ray pulse with a peak brightness of 4.6×10^(26) photons/s/mm2/mrad2/0.1%BW(at 100 MeV)and 1.8×1023 photons/s/mm2/mrad2/0.1%BW(at 2 GeV)are obtained at a laser intensity of 8.5×10^(22) W/cm2 when the plasma density is equal to the critical plasma density nc.In addition,for target 3,the effects of plasma channel length,foil curvature radius,laser polarization,and laser intensity on the γ-ray emission are discussed,and optimal values based on a series of simulations are proposed. 展开更多
关键词 electron acceleration γ-ray emission inverse Compton scattering near-critical-density plasma 2D-QED-PIC simulation
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