Study of Plasma Density Effect on Laser Plasma Wakefield Accelerator in Presence of Axial Magnetic Field

Abstract

In this study, dependence of energy distribution of electrons inside laser plasma wakefield accelerator (LWFA) on factors such as laser's strength, plasma density and axial magnetic field are investigated. LWFAs with hydrogen plasma are simulated using freeware PIConGPU on NARIT's CHALAWAN. Results show that electron blowout inside LWFA is in different mode depending on laser's strength. Energy peak occurs for plasma density range of 10²⁴ m-³ to 10²⁵ m-³ which identifying electrons trapping and acceleration. Energy peaks have common characteristic that the generation of peak and peak deceleration occur for approximately the same time interval. Higher plasma density's energy peak occurs at lower energy while having more particles in the peak. Next, the background axial magnetic effect on energy distribution is observed. The results conclude that some range of magnetic field can be used to enhance LWFAs.