Formation process of large ion Coulomb crystals in linear Paul traps
Formation process of large ion Coulomb crystals in linear Paul traps
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线性保罗陷阱中大离子库仑晶体的形成过程
DOI：
10.1103/physreva.66.013412
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发表时间：
2002
影响因子：
2.9
通讯作者：
M. Drewsen
中科院分区：
文献类型：
--
作者：
L. Hornekær;M. Drewsen
我们报告了线性保罗陷阱中离子库仑晶体形成的各个方面的结果，等离子体中含有几百到几千个激光冷却的${}^{24}{\ maththrm {Mg}}^{+}$离子。所提出的研究包括观察发射荧光的变化，等离子体宽高比的变化，以及壳结构的形成，从云状到晶体状态的转变。观察到射频加热和激光冷却之间的竞争导致从云状无序状态到液体状状态的非常剧烈的转变。在达到液态后，在更高的等离子体耦合参数下，有序进入壳结构是一个连续的过程。这与早先在双曲型射频阱中观察到的少离子等离子体形成对比。
We report on the results on various aspects of the formation of ion Coulomb crystals in linear Paul traps, for plasmas containing from a few hundred to several thousand laser-cooled ${}^{24}{\mathrm{Mg}}^{+}$ ions. The presented studies include observations of changes in emitted fluorescence, changes in plasma aspect ratio, and the formation of shell structure, during the transition from the cloudlike to the crystalline state. The competition between rf heating and laser cooling is observed to result in a very dramatic transition from the cloudlike disordered state to a liquidlike state. After the liquid state is reached ordering into shell structure takes place as a continuous process at even higher plasma coupling parameters. This is in contrast to earlier observations of few-ion plasmas in hyperbolic rf traps.