The magnetic trapping mode of an electron beam ion trap: New opportunities for highly charged ion research
The magnetic trapping mode of an electron beam ion trap: New opportunities for highly charged ion research
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电子束离子阱的磁捕获模式：高带电离子研究的新机遇
DOI：
10.1063/1.1147276
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发表时间：
1996
影响因子：
1.6
通讯作者：
K. Widmann
中科院分区：
文献类型：
--
作者：
P. Beiersdorfer;L. Schweikhard;José R. Crespo López;K. Widmann
使用X射线光谱技术，我们研究了电子束离子阱（EBIT）在电子束关闭后的性质。在没有电子束的情况下，裸露的和类氢的Kr 35+和Kr 36+离子由于外部施加的磁场和电场而保持被捕获至少5秒;具有开放的L壳层的氙离子，即，Xe 45 +-Xe 52+，保持捕获至少20秒。在这种“磁捕获模式”下的离子存储时间取决于背景原子的压力以及外部施加的捕获电势的值，甚至更长的离子存储时间也是可能的。磁捕获模式为涉及高电荷离子的原子物理研究提供了各种新的机会，包括电荷转移反应的研究，兰姆位移的无多普勒频移测量，长寿命亚稳能级的辐射寿命测量，或离子-离子碰撞研究，通过X射线或激光光谱和质谱。是...
Using x‐ray spectroscopic techniques, we have investigated the properties of an electron beam ion trap (EBIT) after the electron beam is switched off. In the absence of the electron beam, bare, and hydrogenlike Kr35+ and Kr36+ ions remain trapped due to externally applied magnetic and electric fields for at least 5 s; xenon ions with an open L shell, i.e., Xe45+–Xe52+, remain trapped at least as long as 20 s. The ion storage time in this ‘‘magnetic trapping mode’’ depends on the pressure of background atoms as well as on the value of the externally applied trapping potential, and even longer ion storage times appear possible. The magnetic trapping mode enables a variety of new opportunities for atomic physics research involving highly charged ions, which include the study of charge transfer reactions, Doppler‐shift‐free measurements of the Lamb shift, measurements of radiative lifetimes of long‐lived metastable levels, or ion‐ion collision studies, by x‐ray or laser spectroscopy, and mass spectrometry. Be...