This paper presents a simulation method with ANSYS Maxwell suited to study threedimensional electrostatic weighting field in a Multi-gap Resistive Plate Chamber (MRPC). The variation of the three-dimensional weighting field with the change in the MRPC design parameters has been studied in detail, which will help us better understand the chamber response. Finally, we shall achieve more real simulation of the chamber signal by introducing the 3D weighting field results into our standalone simulation framework. Signals induced on strip electrodes and simulation results of time resolution and position resolution have been discussed and compared with experimental test. K: Charge induction; Detector modelling and simulations II (electric fields, charge transport, multiplication and induction, pulse formation, electron emission, etc); Resistive-plate chambers; Timing detectors 1Corresponding author.

The rotation of ripple pattern and the shape of the collision cascade in ion sputtered thin metal films J. Appl. Phys.Scattered Si and fast recoiled Al are both present in time-of-flight spectra collected when 2.0 keV Si + ions are incident on an Al͑100͒ surface. Monte Carlo simulations were used to determine the origin of the spectral features, and electrostatic analysis was used to measure the ion yields and charge states as a function of the recoil and incident angles. The analysis indicates that all of the scattered Si projectiles are neutralized, while the recoiled Al is produced as neutrals and in singly, doubly, and triply charged states. The formation of multiply charged ions at this low energy is attributed to inner-shell promotion during the nearly symmetric Si-Al collision. Further experiments used Cl + and SiCl + projectiles for comparison. Multiply charged recoils were not observed with Cl + , while the behavior of SiCl + could be interpreted as a linear combination of Si + and Cl + projectiles.

Surface potential is one of the key properties of charge retain ability and energy storage performance of cellular electrets. Based on charge simulation method (CSM), a high precision simulation algorithm of surface potential of functional dielectrics is proposed in this paper, which can be applied to the simulations of cellular polypropylene after high-voltage corona discharge. In order to validate the modeling, the surface potential of insulating polymer after corona discharge is measured by an electrostatic measurement system and compared with simulation results based on CSM and finite element method (FEM). The result shows that the numerical simulation based on CSM is well consistent with the experimental data, which indicates that the modeling based on CSM can be used in the calculation and analysis of charge storage ability of capacitor and electrostatic generator based on functional electrets. Moreover, as simulation based on CSM has higher precision than FEM, investigation of surface charge storage ability and prediction of electrostatic hazards of insulating dielectrics could be realized by using CSM.

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