Ikeda Shunsuke, Whelan Tommy, Tamis Andrew, Chalfin Harry, Cannavò Antonino, Kanesue Takeshi, Okamura Masahiro, Takahashi Kazumasa
Collider-Accelerator Department, Brookhaven National Laboratory, Upton, New York 11973, USA.
Physics Department, Wesleyan University, Middletown, Connecticut 06457, USA.
Rev Sci Instrum. 2020 Jan 1;91(1):013312. doi: 10.1063/1.5128431.
In recent years, the primary ion source for the Brookhaven National Laboratory has been the laser ion source, which provides many types of ions within a short switching time of several seconds. The task is difficult for other ion sources. In the previous work, we tested metallic lithium as a target material of the laser irradiation. Although an intense lithium beam was demonstrated, some operational difficulties were observed due to its reactiveness to oxygen. For accelerator applications, a more robust and reliable target material has been demanded. For this purpose, we tested lithium niobate, LiNbO. Our study investigated the optimization of power density to produce low charge state lithium ions. We struck LiNbO with the laser and found lithium ion quantities for five different power densities. Based on the data obtained, we can conclude that the most efficient production of Li occurs when the laser power density is 5 × 10 W/cm.
近年来，布鲁克海文国家实验室的主要离子源一直是激光离子源，它能在短短几秒的切换时间内提供多种类型的离子。这项任务对其他离子源来说很困难。在之前的工作中，我们测试了金属锂作为激光辐照的靶材。尽管展示出了强烈的锂束，但由于其对氧气的反应性，观察到了一些操作上的困难。对于加速器应用，需要一种更坚固可靠的靶材。为此，我们测试了铌酸锂（LiNbO）。我们的研究调查了产生低电荷态锂离子的功率密度优化。我们用激光照射LiNbO，并找到了五种不同功率密度下的锂离子数量。根据获得的数据，我们可以得出结论，当激光功率密度为5×10 W/cm时，Li的产生效率最高。
