激光器
原子物理学
电子
材料科学
物理
分析化学(期刊)
光学
化学
核物理学
色谱法
作者
Ki Hong Pae,Chul Min Kim,Vishwa Bandhu Pathak,Chang‐Mo Ryu,Chang Hee Nam
出处
期刊:Plasma Physics and Controlled Fusion
[IOP Publishing]
日期:2022-03-02
卷期号:64 (5): 055013-055013
被引量:4
标识
DOI:10.1088/1361-6587/ac5a0a
摘要
Abstract A direct acceleration scheme to generate high-energy, high-charge electron beams with an intense few-cycle Laguerre–Gaussian (LG) laser pulse was investigated using three-dimensional particle-in-cell simulations. In this scheme, an intense LG laser pulse was irradiated onto a solid density plasma slab. When the laser pulse is reflected, electrons on the target front surface are injected into the longitudinal electric field of the laser and accelerated further. We found that the carrier-envelope phase (CEP) of the few-cycle laser pulse plays a key role in the electron injection and acceleration process. Using a three-cycle LG laser pulse with a 0 = 2 and an appropriate CEP, an about 60 pC electron beam could be obtained at a maximum energy of 16 MeV. In comparison, when a laser pulse with mismatched CEP was used, a total of 4 pC electron beam with a maximum energy of 3.5 MeV was obtained. Linear scaling of electron energy to the laser strength was shown up to a 0 = 100 at which a quasi-monoenergetic electron beam of 850 MeV energy with a charge equal to 600 pC could be obtained. These results demonstrate that high-energy electron beams can be stably generated through direct laser acceleration using a CEP-controlled intense few-cycle LG laser pulse.
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