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漂移管是离子迁移谱(IMS)检测仪的核心部件,设计优劣直接影响IMS仪器的性能。离子在漂移管中的运动十分复杂,受电场及气流、温湿度、压强等多种环境因素的影响。为了研究离子在漂移管中的迁移过程,为IMS漂移管的设计和优化提供指导,本文建立了一种基于SIMION/SDS的多物理场仿真方法,综合考虑了电场、气流、温度及压强等因素的影响,模拟离子在漂移管中的运动。选择IMS标准剂进行实验测试,将仿真结果与实测的离子迁移谱图进行对比分析,验证该仿真方法的正确性。结果表明,漂移管的多物理场仿真方法能够有效地模拟多环境因素影响下离子在漂移管中的迁移情况,对漂移管的设计优化有着重要的意义。
Drift tube is the core component of ion mobility spectrometer (IMS) detector, the design of the merits of a direct impact on IMS instrument performance. Ion drift in drift tube movement is very complicated, by the electric field and air flow, temperature and humidity, pressure and other environmental factors. In order to study the migration process of ions in the drift tube and provide guidance for the design and optimization of the IMS drift tube, a multi-physics simulation method based on SIMION / SDS is established in this paper, taking into account factors such as electric field, air flow, temperature and pressure The effect of the simulated ion drift in the drift tube. The IMS standard was selected for experimental testing. The simulation results were compared with the measured ion mobility spectra to verify the correctness of the simulation method. The results show that the drift tube multi-physics simulation method can effectively simulate the migration of ions in the drift tube under the influence of multiple environmental factors, and is of great significance for the design and optimization of the drift tube.