Ermakov A V, Hinch B J
Department of Chemistry and Chemical Biology, Rutgers University, Piscataway, New Jersey 08854, USA.
Rev Sci Instrum. 2010 Jan;81(1):013107. doi: 10.1063/1.3276686.
A new method for ion extraction from an anharmonic electrostatic trap is introduced. Anharmonicity is a common feature of electrostatic traps which can be used for small scale spatial confinement of ions, and this feature is also necessary for autoresonant ion extraction. With the aid of ion trajectory simulations, novel autoresonant trap mass spectrometers (ART-MSs) have been designed based on these very simple principles. A mass resolution approximately 60 is demonstrated for the prototypes discussed here. We report also on the pressure dependencies, and the (mV) rf field strength dependencies of the ART-MS sensitivity. Importantly the new MS designs do not require heavy magnets, tight manufacturing tolerances, introduction of buffer gases, high power rf sources, nor complicated electronics. The designs described here are very inexpensive to implement relative to other instruments, and can be easily miniaturized. Possible applications are discussed.
介绍了一种从非谐静电阱中提取离子的新方法。非谐性是静电阱的一个常见特征，可用于离子的小尺度空间限制，并且该特征对于自共振离子提取也是必需的。借助离子轨迹模拟，基于这些非常简单的原理设计了新型自共振阱质谱仪（ART-MS）。在此讨论的原型展示了约60的质量分辨率。我们还报告了ART-MS灵敏度对压力的依赖性以及对（mV）射频场强的依赖性。重要的是，新的质谱仪设计不需要重型磁铁、严格的制造公差、引入缓冲气体、高功率射频源或复杂的电子设备。相对于其他仪器，这里描述的设计实施起来非常便宜，并且可以很容易地小型化。讨论了可能的应用。
