Chantipmanee Nattapong, Boillat Marc-Aurèle, Hauser Peter C
University of Basel, Department of Chemistry, Klingelbergstrasse 80, 4056 Basel, Switzerland.
Rev Sci Instrum. 2022 Jul 1;93(7):074703. doi: 10.1063/5.0093479.
A novel high voltage pulser for an ion shutter used in drift-tube ion-mobility spectrometers is described. The simple design suitable for the in-house construction of these spectrometers relies on a special optocoupler to isolate the triggering circuitry from the high voltage at the ion shutter. The device was tested with an electrospray-ionization ion-mobility device with a 10 cm drift tube operated at 4 kV into which a standard test mixture of four tetraalkylamines was injected with a negative going gating pulse of about 50 V on top of 4 kV. A fall time of 15.7 µs and a rise time of 2.0 µs were determined for the pulse, which was adequate for the required injection pulse width of 450 µs. Resolving powers between 61 and 81 were determined for the four quaternary amines, which were found to be comparable to the performance obtained with a previously reported pulser circuitry of a different design used as a reference.
本文描述了一种用于漂移管离子迁移谱仪中离子快门的新型高压脉冲发生器。这种适合于自行构建这些谱仪的简单设计依赖于一种特殊的光耦合器，以将触发电路与离子快门处的高压隔离开来。该装置在一个带有10厘米漂移管、工作电压为4千伏的电喷雾电离离子迁移装置上进行了测试，向其中注入了四种四烷基胺的标准测试混合物，并在4千伏的基础上施加了一个约50伏的负向门控脉冲。测得该脉冲的下降时间为15.7微秒，上升时间为2.0微秒，这对于所需的450微秒注入脉冲宽度来说是足够的。测定了四种季胺的分辨能力在61至81之间，发现其性能与用作参考的先前报道的不同设计的脉冲发生器电路所获得的性能相当。
