论文标题
基于散装微瘤的大型原型TPC中轨道失真的数值研究
Numerical study of track distortion in the Large Prototype TPC with end-plate based on bulk Micromegas
论文作者
论文摘要
当前的$ \ MATHRM {R} \＆\ MATHRM {D} $活动的活动活动涉及使用微型模式设备用于气态扩增阶段的微型模式设备。在DESY的大型原型TPC（LPTPC）的端板上委托进行了七个微羊皮模块，并在1 T磁场下用5 GEV电子束进行了测试。在实验中，在这些模块的边界上观察到了重建轨道中的信号灵敏度以及变形的降低。模块边界附近的静电场不均匀性被认为是这些观察结果背后的主要原因。在目前的工作中，已经使用Garfield Simulation框架探讨了这一假设。通过合适的简化，可以包含问题的计算复杂性。与实验结果达成了定性和定量协议。使用相同的仿真框架提出了减轻问题的可能性。
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.
