鞘场加速机理中质子束的特性与其初始尺寸的关系  

The effect of the proton layer initial size on the proton beam characteristic in target normal sheath acceleration

作　　者：余金清[1,2] 周维民[2] 金晓林[1] 李斌[1] 赵宗清[2] 曹磊峰[1] 董克攻[2] 刘东晓[2] 范伟[2] 魏来[2] 闫永宏[2] 钱凤[2] 杨祖华[2] 洪伟[2] 谷渝秋[2] 

机构地区：[1]电子科技大学大功率微波电真空器件技术国防科技重点实验室,成都610054 [2]中国工程物理研究院激光聚变研究中心,绵阳621900

出　　处：《物理学报》2012年第17期345-351,共7页Acta Physica Sinica

基　　金：国家自然科学基金(批准号:10905009,11174259,11175165,10975121);高等学校博士学科点专项科研基金(批准号:200806141034);重点实验室基金(批准号:9140c6802031003);中央高校基本研究基金(批准号:ZYGX2010J052)资助的课题~~

摘　　要：为了研究激光鞘场中质子层的尺寸对质子束特性的影响,本文应用中国工程物理研究院激光聚变研究中心的二维Particle-In-Cell(2D-PIC)数值模拟程序Flips2D进行了相关数值模拟研究.研究了质子束总能量随时间的变化,得出了加速持续过程与激光脉冲持续时间的关系;研究了质子层的宽度对加速后质子束发散角和能谱的影响;研究了质子层的厚与加速后质子束发散角和能谱的关系;得出了质子层的初始尺寸对加速后质子特性的影响规律.The proton beam accelerated by the interaction of laser with plasma has practical applications in radiography of dense plasma, fast ignition in inertial confinement fusion, and cancer treatment. The application domain is determined by the characteristic of the proton beams, which is affected by a lot parameters. In order to investigate the effect of the initial size of the proton layer, the two-dimensional Particle-In-Cell （2D-PIC） code Flips2D is used. The total energy of proton beam vs. time is studied, and the relation between the duration of acceleration and the period of laser pulse is obtained. The effects of the proton layer initial width and thickness on the divergence angle and the energy spectrum of the proton beam are investigated. The relation between the proton beam characteristics and proton layer initial size is obtained.

关 键 词：鞘场加速 Particle—In—Cell 质子层的尺寸 质子束的特性 

分 类 号：TL632.1[核科学技术—核技术及应用]