Schwarz M, Versolato O O, Windberger A, Brunner F R, Ballance T, Eberle S N, Ullrich J, Schmidt P O, Hansen A K, Gingell A D, Drewsen M, López-Urrutia J R Crespo
Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, 69117 Heidelberg, Germany.
Rev Sci Instrum. 2012 Aug;83(8):083115. doi: 10.1063/1.4742770.
Storage and cooling of highly charged ions require ultra-high vacuum levels obtainable by means of cryogenic methods. We have developed a linear Paul trap operating at 4 K capable of very long ion storage times of about 30 h. A conservative upper bound of the H(2) partial pressure of about 10(-15) mbar (at 4 K) is obtained from this. External ion injection is possible and optimized optical access for lasers is provided, while exposure to black body radiation is minimized. First results of its operation with atomic and molecular ions are presented. An all-solid state laser system at 313 nm has been set up to provide cold Be(+) ions for sympathetic cooling of highly charged ions.
高电荷离子的存储和冷却需要通过低温方法获得的超高真空水平。我们已经开发出一种在4K温度下运行的线性保罗阱，其能够实现约30小时的极长离子存储时间。由此得出H₂分压的保守上限约为10⁻¹⁵毫巴（在4K时）。外部离子注入是可行的，并且提供了针对激光的优化光学通道，同时将黑体辐射暴露降至最低。文中给出了其使用原子和分子离子运行的初步结果。已搭建了一个313nm的全固态激光系统，用于提供冷Be⁺离子，以对高电荷离子进行交感冷却。
