Document Type : Research Paper

Authors

• Elnaz Khalilzadeh ¹
• amir chakhmachi ²
• zohreh dehghni ³

¹ plasma

² هیات علمی پژوهشگاه

³ پژوهشگاه علوم و فنون هسته ای

Abstract

In this paper, the injection of Nitrogen electrons due to ionization in a laser-plasma accelerator is studied. For this purpose, the propagation of short and intense laser pulses with different pulse shapes in a combination of Hydrogen atoms (low atomic number) and Nitrogen atoms (high atomic number) is considered. Using the single-particle Hamiltonian in the plasma wave field caused by the ionization of Hydrogen atoms, the physics and the mechanism of electron ionization injection in the appropriate phase are investigated. Then, the results of the particle-in-cell (PIC) simulation code show that the population and maximum energy of the trapped and injected nitrogen electrons due to ionization are strongly dependent on the laser pulse shape.

Keywords

• Laser plasma accelerator
• Electron trapping
• Field ionization
• Laser pulse shape

Main Subjects

• PARTICLE ACCELERATORS