期刊
PHYSICAL REVIEW LETTERS
卷 121, 期 14, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.121.145002
关键词
-
资金
- Royal Society
- FCT (Portugal) [SFRH/IF/01635/2015]
- Ministry of Science and Technology of the People's Republic of China [2016YFA0401102, 2018YFA0404803]
- Strategic Priority Research Program of the Chinese Academy of Sciences [XDB16]
- EPSRC [EP/R029148/1, EP/N013298/1] Funding Source: UKRI
- Engineering and Physical Sciences Research Council [EP/R029148/1] Funding Source: researchfish
We present a new magnetic field generation mechanism in underdense plasmas driven by the beating of two, copropagating, Laguerre-Gaussian orbital angular momentum laser pulses with different frequencies and also different twist indices. The resulting twisted ponderomotive force drives up an electron plasma wave with a helical rotating structure. To second order, there is a nonlinear rotating current leading to the onset of an intense, static axial magnetic field, which persists over a long time in the plasma (ps scale) after the laser pulses have passed by. The results are confirmed in three-dimensional particle-in-cell simulations and also theoretical analysis. For the case of 300 fs duration, 3.8 x 10(17) W/cm(2 )peak laser intensity we observe magnetic field of up to 0.4 MG. This new method of magnetic field creation may find applications in charged beam collimation and microscale pinch.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据