分类： 物理学 >> 核物理学 提交时间： 2023-12-13
Yi Liu
Xiaocong Ai
Guangyan Xiao
Yaxuan Li
Linghui Wu
Liangliang Wang
Jianing Dong
Mingyi Dong
Qinglin Geng
Min Luo
Yan Niu
Anqing Wang
Chenxu Wang
Meng Wang
Lei Zhang
Liang Zhang
Ruikai Zhang
Yao Zhang
Minggang Zhao
Yang Zhou
摘要： The reconstruction of the tracks of charged particles with high precision is crucial for HEP experiments toachieve their physics goals. The BESIII drift chamber, which is used as the tracking detector of the BESIIIexperiment, has suffered from aging effects resulting in degraded tracking performance after operation for ap-proximately 15 years. To preserve and enhance the tracking performance of BESIII, one of the proposals is toadd one layer of a thin cylindrical CMOS pixel sensor based on state-of-the-art stitching technology betweenthe beam pipe and the drift chamber. The improvement in the tracking performance of BESIII with such anadditional pixel detector compared to that with only the existing drift chamber was studied using the moderncommon tracking software ACTS , which provides a set of detector-agnostic and highly performant trackingalgorithms that h
分类： 物理学 >> 核物理学 提交时间： 2016-09-14
Qinglei Xiu
Mingyi Dong
Weidong Li
Huaimin Liu
Qiumei Ma
Qun Ouyang
Zhonghua Qin
Liangliang Wang
Linghui Wu
Ye Yuan
Yao Zhang
摘要： The inner drift chamber of the BESIII is encountering serious aging problem after five year's running. For the first layer, the decrease in gas gain is about 26% from 2009 to 2013. The upgrade of the inner tracking detector has become an urgent problem for the BESIII experiment. An inner tracker using CMOS pixel sensors is an important candidate because of its great advantages on spatial resolution and radiation hardness. In order to carry out a Monte Carlo study on the expected performance, a Geant4-based full simulation for the silicon pixel detector has been implemented. The tracking method combining the silicon pixel inner tracker and outer drift chamber has been studied and a preliminary reconstruction software was developed. The Monte Carlo study shows that the performances including momentum resolution, vertex resolution and the tracking efficiency are significantly improved due to the good spatial resolution and moderate material budget of the silicon pixel detector.
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