Motion And Radiation Of Electron Captured In Laser Standing Wave

In the field of plasma physics,the interaction between Ultra-short ultra-intense laser and material can generate terahertz, X-ray laser radiation, with high frequency, short time, low energy. Terahertz can be widely used in communications, astronomy, medical imaging and other fields. With high brightness, short pulse width, wavelength, and the advantages, X-ray laser with good application prospect in the atomic structure and dynamics, medicine, laser plasma physics, materials science and other fields.One of the work of this paper is X-ray and terahertz radiation of electron captured in laser standing wave, Another work is the movement of electron beam and X-ray radiation in the interaction between laser and plasma thin foil target.X-ray and terahertz radiation of electron captured in linear polarization laser standing wave:Based on the classical radiation theory, the motion and radiation of electron captured in linear polarized laser standing wave(LSW) have been investigated. The one dimensional quasi-periodic motion of electron turns into two dimensional folding motion, and terahertz radiation with wavelength at micron scales are generated by increasing the intensity of LSW when electron at low speed are launched perpendicularly to the electric field of relativistic LSW. X-ray radiations are both generated by relativistic electrons launched in direction perpendicular or parallel to the electric field of LSW. We provide a simple and convenient method to get x-ray and terahertz radiation source in small-scale.Electronic movement and radiationin in Circular polarization laser standing wave: We study the motion and radiation of electrons with different initial energy in Circular polarization laser standing wave.It turned out that the electronic radiation frequency will increase when the length of standing wave field space grows,but the location of the maximum radiation frequency is the largest electronic speed position. This shows that the electronic speed is reduced, the radiation frequency is falling. On the other hand, the radiation frequency will get bigger, when the initial energy of electronic increase.We studied the X-ray radiation generated in the interaction between laser and plasma thin foil target and the movement of high density electron beam in the standing wave. Based on single target model,we add a high density target, the high density target eliminates the transverse momentum of electronic, to achieve a purpose that the X-ray wavelength decrease, and the photon energy increase. Because of the influence between the incident laser and reflection laser, there is a laser standing wave field formed in front of a target. We studied the movement of high density of electron in standing wave that before the high density target.This article is divided into five chapters. The first chapter introduces the ultrashort wave length X ray radiation of the electromagnetic radiation and the applications of terahertz radiation, the research progress and application between laser and single electron, the progress between the interaction of laser and plasma, the high-energy electron beam and short wavelength radiation produced in the process of interaction between laser and plasma. The second chapter studied the X-ray and terahertz radiation of electron captured in linear polarization laser standing wave.The third chapter studied the electronic movement and radiation in Circular polarization laser standing wave. The fourth chapter studied the X-ray radiation generated in the interaction between laser and plasma thin foil target and the movement of high density electron beam in the standing wave. The fifth chapter is summary and outlook.