We present a new two-plate linear ion trap mass spectrometer that overcomes both performance-based and miniaturization-related issues with prior designs. Borosilicate glass substrates are patterned with aluminum electrodes on one side and wire-bonded to printed circuit boards. Ions are trapped in the space between two such plates. Tapered ejection slits in each glass plate eliminate issues with charge build-up within the ejection slit and with blocking of ions that are ejected at off-nominal angles. The tapered slit allows miniaturization of the trap features (electrode size, slit width) needed for further reduction of trap size while allowing the use of substrates that are still thick enough to provide ruggedness during handling, assembly, and in-field applications. Plate spacing was optimized during operation using a motorized translation stage. A scan rate of 2300 Th/s with a sample mixture of toluene and deuterated toluene (D8) and xylenes (a mixture of o-, m-, p-) showed narrowest peak widths of 0.33 Th (FWHM).

Open image in new window

我们提出了一种新型的两板式线性离子阱质谱仪，它克服了现有设计中基于性能和与小型化相关的问题。硼硅酸盐玻璃基板在一侧上带有铝电极，并通过引线键合到印刷电路板上。离子被困在两个这样的板之间的空间中。每个玻璃板中的锥形喷射缝消除了在喷射缝内积累电荷以及阻塞以非标称角度喷射的离子的问题。锥形狭缝可将捕集阱特征（电极尺寸，狭缝宽度）微型化，以进一步减小捕集阱尺寸，同时允许使用仍足够厚的基板，以在处理，组装和现场应用中提供坚固性。板间距在操作过程中使用电动平移台进行了优化。o-，m-，p-）的最窄峰宽为0.33 Th（FWHM）。

在新窗口中打开图像