新型摆动器自由电子的自发辐射

Spantaneous emission of the novel wiggler freeelectron

Ｓ．Ｐｉｎｈａｓ于１９９０年提出一种新型摆动器—磁场与纵向坐标无关摆动器。本文在Ｓ．Ｐｉｎｈａｓ工作的基础上，利用广义Ｂｅｓｅｌ函数计算了电子在这种摆动器中运动产生的自发辐射强度分布，得到了一个较普遍的自发辐射谱表达式。结果表明：新型摆动器自由电子的自发辐射谱与普通平面摆动器自由电子的自发辐射谱相似，谱线的形状由ｓｉｎｃ（η）函数决定。

The spantaneous emission spectrum of the novel wiggler freeelectron is obtained by means of the general Bessel functions.It is found that the angular spectrum of the novel wiggler freeelectron is similar to that of the plane undulator freeelectron and the line shape of the spectrum is also determined by the function sinc(η).