二维摆动磁场自由电子激光自发辐射的频谱特性  

ANGULAR SPECTRUM PROPERTY OF SPONTANEOUS EMISSION IN A TWO-DIMENSIONAL UNDULATOR FREE-ELECTRON LASER

作　　者：彭良福[1] 杨中海[1] 刘盛纲[1] 

机构地区：[1]电子科技大学高能电子学研究所,成都610054

出　　处：《电子科学学刊》1993年第5期493-499,共7页

基　　金：国家863高技术计划强激光技术领域和国家教委博士点基金

摘　　要：本文对二维摆动磁场自由电子激光的自发辐射频谱进行了理论分析,并对分析结果进行了数值计算.计算结果表明,采用l(lk_(■=k_■)值不同的二维摆动磁场,可以增强第l次谐波的自发辐射强度,从而能够有选择地实现自由电子激光的高次谐波运转.The angular spectrum of spontaneous emission in a wo-dimensional undulator free-electron laser is analyzed theoretically. Numerical calcularion shows that the s-th harmonic spontaneous emission power density can be greatly enhanced by using a two-dimensional undulator, for which l = s. so the harmonic number can be selected by selecting l. Therefore, the higher harmonic operation of a free-electon laser can be realized selectively.

关 键 词：自由电子激光 摆动磁场 频谱特性 

分 类 号：TN248.6[电子电信—物理电子学]