非相对论线偏振激光下的J×B加热  

J×B heating by non-relativistic linearly polarized laser light

作　　者：静国梁[1] 余玮[2] 李英骏[1] 赵诗华[1] 钱列加[3] 田友伟[2] 刘丙辰[2] 

机构地区：[1]中国矿业大学(北京),北京100083 [2]中国科学院上海光学精密机械研究所强光光学实验室,上海201800 [3]复旦大学,上海200433

出　　处：《物理学报》2006年第7期3475-3479,共5页Acta Physica Sinica

基　　金：国家自然科学基金(批准号:10474137);国家高技术研究发展计划(批准号:2004AA841102)资助的课题.~~

摘　　要：利用解析的方法研究了非相对论线偏振激光与等离子体相互作用中的J×B加热吸收机理,建立了一种包含两类有质动力效应在内的自洽理论.探讨了密度轮廓修正下的J×B加热机理,给出了相应的吸收系数随激光场强度变化的关系曲线.研究发现,当激光场强度A0=20时,J×B加热所导致的吸收系数fabs约为2.8%.The J × B heating mechanism of plasma under the radiation of non-relativistic linearly polarized laser light is studied ana- lytically and a self-consistent theory including the effects of two kinds of ponderomotive forces is developed. Meanwhile, the J × B heating mechanism with the density profile modification is discussed, and the relation curve of the corresponding absorption coefficient vis the laser intensity is obtained. The result shows that the absorption coefficient fabs owing to the J × B heating is about 2.8 % when the laser intensity factor A0 = 20.

关 键 词：J×B加热 有质动力 密度轮廓 

分 类 号：O53[理学—等离子体物理]