The present $\mathrm{R}\&\mathrm{D}$ activities for the International Large Detector Time Projection Chamber (ILD-TPC) concern the adoption of the micro pattern devices for the gaseous amplification stage. Seven Micromegas modules which are commissioned on the end-plate of a Large Prototype TPC (LPTPC) at DESY, were tested with a 5 GeV electron beam, under a 1 T magnetic field. During experiments, reduced signal sensitivity as well as distortion in the reconstructed track was observed at the boundaries of these modules. Electrostatic field inhomogeneity near the module boundaries was considered to be the possible major reason behind these observations. In the present work, this hypothesis has been explored using the Garfield simulation framework. It has been possible to contain the computational complexity of the problem with suitable simplifications. Qualitative and quantitative agreements with experimental results have been achieved. Possibility of mitigating the problems has been proposed using the same simulation framework.

中文翻译：

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基于块体 Micromegas 的带端板的大型原型 TPC 轨道畸变的数值研究

目前国际大型探测器时间投影室 (ILD-TPC) 的 $\mathrm{R}\&\mathrm{D}$ 活动涉及采用微图案装置用于气体放大阶段。在 DESY 的大型原型 TPC (LPTPC) 的端板上调试的七个 Micromegas 模块在 1 T 磁场下使用 5 GeV 电子束进行测试。在实验过程中，在这些模块的边界处观察到信号灵敏度降低以及重建轨迹中的失真。模块边界附近的静电场不均匀性被认为是这些观察背后的可能主要原因。在目前的工作中，这个假设已经使用加菲猫模拟框架进行了探索。可以通过适当的简化来控制问题的计算复杂性。已实现与实验结果的定性和定量一致。已经使用相同的模拟框架提出了减轻这些问题的可能性。