Design and characterization of a linear quadrupole ion trap for high-resolution Coulomb-crystal time-of-flight mass spectrometry
Design and characterization of a linear quadrupole ion trap for high-resolution Coulomb-crystal time-of-flight mass spectrometry
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DOI：
10.1140/epjti/s40485-016-0032-3
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发表时间：
2016-07-16
影响因子：
1
通讯作者：
Willitsch, Stefan
中科院分区：
文献类型：
--
作者：
Rosch, Daniel;Gao, Hong;Willitsch, Stefan
我们提出并详细讨论了一种新的线性四极离子阱的设计和表征，该阱具有附加的离子喷射和加速电极，该电极与飞行时间质谱仪耦合。由Ca+， CaO+和CaOH+离子组成的库仑晶体的质谱用喷射后加速方案记录下来，得到的质量分辨率为m/ δ m，接近700。测定了Ca+ + N2O -> - CaO+ + N-2反应的二级速率常数，以验证该装置在离子-分子反应研究中的可用性。反应速率常数为5.49（32）。10(-11)cm(3)s(-1)，与以往文献值比较。由于获得了高质量分辨率，本仪器是研究涉及库仑晶体的复杂化学反应产物的理想工具。
We present and discuss in detail the design and characterization of a new linear quadrupole ion trap with additional ion ejection and acceleration electrodes that is coupled to a time-of-flight mass spectrometer. Mass spectra of Coulomb crystals consisting of Ca+, CaO+ and CaOH+ ions were recorded with a post-ejection-acceleration scheme yielding a mass resolution of m/Delta m approximate to 700. The second order rate constant for the reaction Ca+ + N2O -> CaO+ + N-2 was measured to test the usability of this apparatus for ion-molecule reaction studies. The rate constant was found to be 5.49(32) . 10(-11)cm(3)s(-1) which is compared with previous literature values. Owing to the high mass resolution achieved, the present instrument is an ideal tool for the study of the products of complex chemical reactions involving Coulomb crystals.