The electromagnetic field distribution of the focused flat-topped Gaussian beam is studied by the superposition of multi-order Laguerre Gaussian beams. The phase velocity distribution of the laser field near the focal spot and the relativistic electrons incident near the focal spot are studied using this model. Dynamic behavior. The results show that similar to the fundamental mode Gaussian beam, there is still a low phase velocity region in the focused flat Gaussian beam, and there is still a capture acceleration mechanism (CAS), and electrons can be effectively accelerated by this mechanism.
In recent years, strong laser technology has developed rapidly and has inspired many frontier research fields. Among them, laser electron acceleration research has received extensive attention.
In our past work, we proposed a new vacuum photon acceleration mechanism, which we call the capture acceleration mechanism (CAS). These results are mainly obtained under the fundamental mode Gaussian beam. However, many laser systems, including high-gain lasers, saturated activation dielectric lasers (stable or unstable), and variable reflectance mirror lasers, are laser beams. The distribution of the flat tops, that is to say the middle intensity of the light beam is essentially uniform, the edges are smoothly reduced to zero.
A very natural question is whether the CAS mechanism is still valid in focused flat-topped beams. The purpose of this article is to answer this question. Groi proposed a new model for the flat-topped beam, the flat-top Gaussian beam (FGB). The greatest advantage of this model is that it can be represented as a superposition of several orders of weighted Laguerre-Gaussian (LG) beams, so its transmission law can be given using the transmission law of the known LG beam.
In this paper, we first use the LorenZt specification to rigorously derive the analytical expressions of the focused FGB electromagnetic field components, which will be significant for many studies. Then, the three-dimensional (3D) particle simulation program was used to study the kinetic behavior of the relativistic electrons injected into the focused FGB to verify the effectiveness of the CAS mechanism in such a laser field. The analytical expression of the focused FGB electromagnetic field is given using the Lorentz specification. In the Focused FGB, there is a low phase velocity region where the phase velocity is less than the vacuum light velocity, and the CAS electron acceleration mechanism is still effective. The relativistic electrons that are incident into the vicinity of the focal spot at an appropriate angle will be effectively accelerated by the CAS mechanism.
Slicer And Dicer(Meat Dicer) are used in different fields of food industrial such as for meat, cheese, vegetables, fruits etc. Helper`s slicer and dicer seies are applied in both restaurant and industrial plant. To produce portioned bacon, the Rib chopper will help. To make vegatable and meat mixture for dumpling production, QD02 Vegetable Dicer will be the best choice.
In addition to them,we also supply the Cubing Machines.
Slicer And Dicer
Potato Slicer,Food Chopper,Vegetable Dicer,Vegetable Cutter,Meat Dicer,Cubing Machines
Shijiazhuang Helper Food Machinery Co., Ltd. , http://www.processings.nl