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一、进展概况高功率短波长和波长连续可调高功率激光器一直是激光研究的两个主要方向,自由电子受激辐射正是为实现这种目的的一种新途径.原理上,利用自由电子受激辐射可以实现从微波至X射线、γ射线宽波长连续可调的高功率、高效率微波与光激射器.因此,它已引起人们的普通重视.早在1933年,有人根据量子理论提出利用“摆动”或“波动”电子束与电磁波相互作用产生“受激散射”的概念.两个散射区域分别为:(1)康普顿散射:两波互作用(或单个电子互作用);(2)拉曼散射:三波互作用(或集团电子互作用).1951年莫茨(Motz)提出自由电子受激辐射理论.他认为,当电子行经电场或磁场时产生辐射,辐射的频率取决于电子的速率,电子能量从1兆电子伏到1千兆电子伏范围内可产生从微波至硬X射线频谱.他认为,将电子束聚焦,可以使一群电子相干地辐射,相干辐射功率比非相干辐射约高
First, the progress of the high-power short-wavelength and continuously adjustable wavelength High-power lasers laser has been the two main directions of research, free electron stimulated emission is to achieve this goal a new way.In principle, the use of free electrons Stimulated radiation can be achieved from microwave to X-ray, γ-ray wide-wavelength continuously adjustable high-power, high-efficiency microwave and light lasers.Therefore, it has aroused common attention.As early as 1933, according to quantum theory The concept of “stimulated emission” by the interaction of electron beam and electromagnetic wave with “swing ” or “fluctuation ” is proposed.The two scattering regions are: (1) Compton scattering: two-wave interaction Or single electron interaction); (2) Raman scattering: three-wave interaction (or group electron interaction) .1951 Motz proposed free electron stimulated emission theory .He believes that when the electrons travel through the electric or magnetic field The frequency at which radiation is generated depends on the rate of electrons that can be generated from microwave to hard X-ray spectrum from 1 megahertz to 1 megahertz. He believes that focusing the electron beam allows a group of electrons to cohere Radiation, coherent radiation power than non Dry about high radiation