A high intensity highly charged laser ion source has been studied at the Institute of Modern Physics for the last few years. In order to investigate the processes of plasma heating and expansion of laser produced plasma, the charge state and energy distributions of the ions from pure copper, silver, and copper-silver alloy, in which the atom number ratio between copper and silver is 2:3, were measured with a 90° cylindrical electrostatic ion analyzer. It was shown that the yields of highly charged copper ions from the pure copper target are higher compared with those of the alloy target. In contrast, higher yields of highly charged silver ions were obtained from the copper-silver alloy target. Moreover, the ion energy distributions were derived from the time-of-flight spectra for the ions with different ion charge states and compared between the pure metal and alloy targets.

中文翻译：

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纯金属及其合金激光等离子体的离子电荷态和能量分布

最近几年，近代物理研究所一直在研究高强度高电荷激光离子源。为了研究等离子体加热和激光产生等离子体膨胀的过程，纯铜、银和铜银合金离子的电荷态和能量分布，其中铜和银的原子数比为2： 3，用90°圆柱形静电离子分析仪测量。结果表明，与合金靶相比，纯铜靶中高电荷铜离子的产率更高。相比之下，从铜银合金靶中获得了更高产率的高电荷银离子。而且，