Emission Characteristics Of Radiation Generated From Electron Oscillations Driven By A Circularly Polarized Laser Pulse

With the rapid development and continuous breakthroughs of CPA, the interaction between the laser pulse and the material has made a brand new start. The CPA technique makes the output power of the laser increase from TW(1012W) level to PW(1015W) level, shorten the pulse width from picosecond to femtosecond, or even attosecond order, and the focused laser intensity reaches more than 1022W/cm2. The synchronous radiation energy produced by the interaction between such a high intensity laser pulse and the high-energy electron is very high, the byproduct of the process is an increase in the energy of both the incident laser pulse and the electron, getting shorter and more intense X-ray pulse width. This makes synchronous laser radiation can be one of the methods to produce "water window" band(2.3-4.4nm) X ray radiation source, for it can generate shorter wavelength X-ray radiation with saturation output energy and good coherence. In order to achieve this goal, we need to probe deeply into the interaction process of high-power laser pulse and a high-energy electron.This paper mainly adopts a single electron model to simulate the process through theoretical analysis and numerical studies. To start with, different central interacting positions of the laser and the electron have obvious effect on the radiated power and spatial distribution characteristics. On top of that, the paper aims to study how different intensities, pulse width and different initial phase conditions affect the spatial distribution in the circular polarized field. In the last chapter, a detailed study of how both the different intensities and initial phases of few-cycle laser pulse affect spatial distribution has been given.Through the study above, we can find that these parameters can influence the whole spatial radiation properties of the electron obviously. This feature can be used to measure the central colliding position between the single electron and the laser pulse, the intensity, the pulse width and the initial phases, or other parameters in the experiment in turn. What’s more, the study will be of help to produce X-rays radiation that have good directional properties and better quality by controlling the parameters accurately.