The Investigation Of Electron Acceleration By Intense Laser In Vacuum

In this thesis, the possibility of electron acceleration by intense laser light in vacuum is investigated theoretically, the necessity conditions are derived, while the expressions of the energy gain are obtained. In the whole thesis, the emphases are made on the direct electron acceleration using the intense laser, while the development of the accelerator and laser acceleration technology are mentioned. The thesis consists of six chapters. Chapter 1 is a survey. Chapter 2 is the outline of the development of the accelerator and laser acceleration technology. Chapter 3 is an introduction to the project of electron acceleration by intense laser in vacuum, some acceleration models are also mentioned. From the 4th Chapter to the 6th Chapter, my own research work during three years as a graduate student are included.Chapter 1 is a background of the research work and the research purpose of the thesis. An introduction of the development of interaction between intense laser and matter, the inertial confinement fusion (ICF) and laser fution "fast ignitor" scheme are also introduced.An outline of the conceivability and development of the accelerator and laser acceleration technology are included in Chapter 2. The emphasis and scope of my study field are pointed out in the thesis.In Chapter 3, We have studied the possibility of electron acceleration by intense laser light in vacuum. The longitudinal component of laser field is derived from the Maxwell equations. In order to accelerate electrons effectively and gain the net energy from laser field, "Lawson-Woodard" law must be broken out to meet some necessary conditions. Some models of electron acceleration are also investigated.The theoretical analysis of the electron acceleration by single intense laser light in vacuum is included in Chapter 4. Based on the 3th chapter, we have analyzed theoretically the electron acceleration by single Hermite-Gaussian and Bessel intense laser light in vacuum, and have acquainted the necessity conditions and energy gain.Chapter 5: In order to accelerate electron, the higher intense light is often used, so usually the focused light is adopted. We have compared the characteristics on electron acceleration in vacuum between focused Gaussian beam and fundamental Gaussian beam.Chapter 6 is the theoretical analysis of the electron acceleration by crossed intense laser light in vacuum. Based on the above chapters, in theory we have analyzed the electron acceleration by crossed Hermite-Gaussian intense laser light in vacuum, and have gained the necessity conditions and energy gain.