Laser - Electronic Nonlinear Compton Scattering Characteristics Research

The free electrons laser was born in1970’s , since its birth in theory and experiment sinceall have developed rapidly. The core problem of the free electrons laser is the free electronicand optical field interaction. With super laser field and strong laser technology development,and the realization of the extreme conditions, the electron on the laser beam of elasticscattering began to appear, the process of the main mechanism is the energy exchange ofnonlinear Compton (Compton) scattering energy exchange. That is in the electronic andoptical field interaction in the process of absorption more photons, launch a new photonprocess. To the scattering process, not only conducive to further understand the principle offree electrons laser produce, and to produce a short wave long free electronic laser and carefulstudies and high performance of the free electrons laser application development and laid asolid foundation.This paper mainly uses two kinds of model of laser-electronic Compton scatteringcharacteristics of nonlinear. Full text includes five chapters. The first chapter brieflyintroduces the laser and nonlinear free electrons Compton scattering of development and thestatus quo. The second chapter using standard perturbation theory, study nonlinear Comptonscattering of electrical power, scattering the light frequency and differential scattering sectionfeatures. First studied n photon group nonlinear Compton scattering of light scatteringfrequency in different direction with the change of the incident Angle scattering, and thenstudy in the process of the scattering electronic energy variation characteristics, once again,we and use standard perturbation theory in electronic static reference is deduced the n photongroup Compton scattering nonlinear differential scattering section of the expression anddiscussion. Finally, we through the Lorentz transformation get in the frame of referencelaboratory nonlinear Compton scattering of photon differential scattering section features. Theresults show that: the scattering frequency in the scattering Angle certain electronic energychange, scattering light frequency is proportional to the number of photons except withdifferent place with external azimuth Angle change trend is different, also in the azimuth must,different Angle scattering in the changes of different also. Scattering light scattering section inaddition to and photonic differential number density (n-1) time is directly proportional tooutside, still and scattering Angle, azimuth and initial conditions about. In the above study ,use the simulation calculation for the detailed research. This further our future work in thepractical operation provides important reference value. Chapter 3 shows the freedom ofmovement in the field of electronic in quantum electrodynamics theory, and introduces the half classical method, using this method can deal with electronic field emission in the problem.The fourth chapter using a classical method, study the polarization of the plane wave longstrong nonlinear Compton scattering n photons in the process of the change of the electronicenergy, scattering frequency and differential scattering section features. Through to the lowfrequency limit of electronic energy change, scattering the light frequency and differentialcross section incident light scattering and the relationship between the strong research that:using nonlinear Compton scattering produces photons shortwave photon and get a real needthe scattering, here in certain scattering direction to initial conditions and choice of appropriatelight field strength. For the electronic energy and optical field intensity of Compton scatteringcertain nonlinear, scattering Angle must, different azimuth of the corresponding scatteringprocess corresponding incident Angle has a critical value, the critical value is light field ofenergy before and after the increase or decrease. The fifth chapter is summarized and outlook,this paper summarizes the main results, points out that the more photons in short wave lightsources and free scattering in the development of the electronic laser importance.