3.1. Geometry model.
Numerical simulations are carried out using SIMION 8.1 (Scientific Instrument Services Inc.) [10]. In numerical simulations, it is crucial to accurately construct the geometry model of the MRTOF in order to obtain a realistic trajectory of the ions. Due to limitations in RAM and computing power, the MRTOF model is divided into four separate geometry arrays with varying precision. Our high-resolution SIMION model (with an accuracy up to 0.05 mm grid unit–1) is suitable for predicting ion transmission through medium and high vacuum systems in mass spectrometry. It also allows for optimizing operational parameters. The structure of the MRTOF model is shown in Fig.2.