超短激光脉冲用于检测离子束内部有序性的诊断方法

presented for detecting ordering within one-dimensional ion beams in a storage ring. The ions are simultaneously excited by a ultrashort pulsed laser ($\simeq 1$ ps) at two different locations along the beam and fluorescence is detected by a group of four photo-multipliers. Correlation in fluorescence signals is a firm indication that the ion beam has an ordered structure. 该方法通过在储存环中一维离子束内的两个不同位置同时用超短脉冲激光（$\simeq 1$ ps）激发离子，并由四个光电倍率器检测荧光来实现。荧光信号之间的相关性是离子束具有有序结构的坚实指征。