特殊用法cascade bunching1.级联聚束electron bunching1.电子聚束(作用)harmonic bunching1.谐波聚束ideal bunching1.(电子)理想聚束kinematic bunching1.动态聚束optimal bunching1.最佳聚束[群聚]photon bunching1.光子集束效应reflex bunching1.反射聚束