The Simulation Of Ion Acceleration In Laser-plasma Interaction

Laser-matter interaction physics research is now in a very important area ofphysics research, with the recent development of laser technology, especially theapplication of CPA laser amplification，now the maximum intensity of laser can beobtained in the laboratory have reached1022W cm2. When the laser intensity ishigher than1016W cm2, laser-matter interaction into the laser-plasma interactionareas for under the irradiation of so intense laser material is rapidly ionized to forma plasma. High-energy ions can be obtained through intense laser-plasma interaction,which can be applied to treatment of cancer in medicine, to produce hot densematter, to achieve inertial confinement fusion ignition, to research no astrophysicsand particle physics. Now, has been known for the mechanism of laser-driven ionacceleration mechanisms include: radiation pressure acceleration mechanism (RPA),the target normal sheath acceleration (TNSA) mechanism, collision-free staticshock acceleration mechanism. The main work of this paper is to simulationresearch on the process of laser-driven ion acceleration, include radiation pressureacceleration mechanism and the target normal sheath acceleration mechanism, bychanging the laser and plasma parameters, to simulation research on laser-plasmainteraction mechanisms under different conditions. And analysis of the ion beamwhich obtained under these mechanisms. Based on this, will discuss of laser-drivenion acceleration in the fast ignition. Consider the impact of pre-compressed pelletcrown area on the ignition ion’s energy, respectively, estimates the energy neededfor using the radiation pressure acceleration mechanism and target normal sheathacceleration mechanism to obtain high energy ion beam to achieve ignition for thesame one-dimensional model of flat pellet. By comparing of the energy needed toachieve ignition in different ways, to get a better way to ignition.