Laser Wakefield Acceleration Via Ionization Injection

With accelerating fields as high as 100 GV/m,laser plasma acceleration is a promising new research field.At lower cost,laser plasma accelerators can serve as the next generation of particle accelerators.With the rapid development of laser technology,TW and PW level lasers are widely used in LPA-based experiments.In the last 30 years,laser wakefield acceleration is now a significant research field in laser-matter interactions.High quality electron beams(high energy,low energy spread,low emittance)are very important in applications such as synchrotron,collider and free electron laser.Researchers have been worked hard to study the LWFA in theory and experiments.From hot electrons to mono-energetic e-beams,LPAs have been more and more practical.Chapter 1 is introduction.The background and development of LPAs is introduced briefly.LPAs have great advantages and can be wildly used for many research areas.Also,we explain the basic concepts and theories of LPA in detail..In Chapter 2,we introduce the development of laser wakefield acceleration,especially the important breakthroughs.Our group has a long history of electron beam sources.The study of laser wakefield acceleration in nitrogen gas via ionization is presented in detail.In Chapter 3,we demonstrate our work in laser-cluster interactions and explain.By exploiting the advantages of clusters,we succeed in generating mono-energetic electron beams via fs laser-Argon clusters and present our explanations.In Chapter 4,our work in diagnostic techniques and target field construction,which guarantee the high-level LWFA experiments,is introduced briefly.