啁啾激光脉冲—等离子体加速及其应用研究

项目名称： 啁啾激光脉冲—等离子体加速及其应用研究

项目编号： No.11304077

项目类型： 青年科学基金项目

立项/批准年度： 2014

项目学科： 数理科学和化学

项目作者： 栗建兴

作者单位： 河北师范大学

项目金额： 28万元

中文摘要： 近年来，随着超短超强激光技术的快速发展,新型激光粒子加速器已经成为强场物理的研究热点之一.激光粒子加速器产生的高能离子束在医疗和工业等领域（例如：离子治疗和离子刻蚀）有重要应用。目前,实验上已经实现了采用PW激光器加速获得几十甚至几百MeV的离子束，离子束能散度可以降低到15%左右。在本课题中，我们将采用Particle-In-Cell（PIC）仿真代码模拟研究超短超强啁啾激光脉冲-等离子体加速机制。在现有实验条件下，此机制有望在较大程度上提高离子束平均能量并降低离子束能散度。另外，通过研究啁啾激光脉冲和等离子体靶材的初始参数对离子束质量的影响规律，我们将得到啁啾激光脉冲-等离子体加速的最佳初始条件，并且，模拟产生能够用于离子治疗和离子刻蚀等领域的高质量离子束。此外，我们将采用PIC仿真代码模拟离子治疗和离子刻蚀的基本物理过程.

中文关键词： 啁啾激光脉冲；等离子体；粒子模拟；离子加速；电子加速

英文摘要： Recently, following the fast developments of ultrashort and ultrastrong laser technology, laser ion acceleration has been one of the most attractive research aspects of intense field physics. Ion beams of high energy produced by laser ion accelerators are very useful for medical as well as industrial applications,such as ion therapy and ion lithography, respectively. At present, ion beams with energies of dozens or even hundreds of MeV have been realized experimentally by employing PW laser pulses. The energy spread of ion beams is of the order of 15%. In this project, based on Particle-In-Cell (PIC) simulation codes we will study super short and super strong chirped laser pulse-plasma acceleration. The kinetic energies of ion beams produced by this acceleration scheme would be much higher, and the energy spreads would be much lower than in present experiments. Additionally, the roles of initial parameters of the chirped laser pulses and plasma targets in determining the quality of ion beams will be studied carefully. We will obtain the optimal acceleration condition of this acceleration scheme, and the ion beams of high quality for the applications of ion therapy and ion lithography will be produced in simulations. Besides, the basic physics processes of ion therapy and ion lithography will be simulated by PIC

英文关键词： Chirped laser pulse；Plasma；Particle-in-cell simulation；Ion acceleration；Electron acceleration