Beam test result and digitization of TaichuPix-3: A Monolithic Active Pixel Sensors for CEPC vertex detector

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Main Authors:	Lu, Hancen, Zhang, Tianyuan, Xu, Chang, Li, Shuqi, Huang, Xinhui, Zhou, Jia, Yan, Ziyue, Wang, Wei, Zeng, Hao, Jia, Xuewei, Hu, Yiming, Zhang, Xiaoxu, Liang, Zhijun, Wei, Wei, Zhang, Ying, Wei, Xiaomin, Wu, Tianya, Zhang, Lei, Qi, Ming, Hu, Jun, Fu, Jinyu, Zhang, Hongyu, Li, Gang, Wu, Linghui, Dong, Mingyi, Li, Xiaoting, Casanova, Raimon, Zhang, Liang, Dong, Jianing, Wang, Jia, Zheng, Ran, Lu, Weiguo, Grinstein, Sebastian, da Costa, João Guimarães
Format:	Preprint
Published:	2025
Subjects:	Instrumentation and Detectors High Energy Physics - Experiment
Online Access:	Acceder al recurso
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_version_	1866909533520003072
author	Lu, Hancen Zhang, Tianyuan Xu, Chang Li, Shuqi Huang, Xinhui Zhou, Jia Yan, Ziyue Wang, Wei Zeng, Hao Jia, Xuewei Hu, Yiming Zhang, Xiaoxu Liang, Zhijun Wei, Wei Zhang, Ying Wei, Xiaomin Wu, Tianya Zhang, Lei Qi, Ming Hu, Jun Fu, Jinyu Zhang, Hongyu Li, Gang Wu, Linghui Dong, Mingyi Li, Xiaoting Casanova, Raimon Zhang, Liang Dong, Jianing Wang, Jia Zheng, Ran Lu, Weiguo Grinstein, Sebastian da Costa, João Guimarães
author_facet	Lu, Hancen Zhang, Tianyuan Xu, Chang Li, Shuqi Huang, Xinhui Zhou, Jia Yan, Ziyue Wang, Wei Zeng, Hao Jia, Xuewei Hu, Yiming Zhang, Xiaoxu Liang, Zhijun Wei, Wei Zhang, Ying Wei, Xiaomin Wu, Tianya Zhang, Lei Qi, Ming Hu, Jun Fu, Jinyu Zhang, Hongyu Li, Gang Wu, Linghui Dong, Mingyi Li, Xiaoting Casanova, Raimon Zhang, Liang Dong, Jianing Wang, Jia Zheng, Ran Lu, Weiguo Grinstein, Sebastian da Costa, João Guimarães
contents	The Circular Electron-Positron Collider (CEPC), as the next-generation electron-positron collider, is tasked with advancing not only Higgs physics but also the discovery of new physics. Achieving these goals requires high-precision measurements of particles. Taichu seires, Monolithic Active Pixel Sensor (MAPS), a key component of the vertex detector for CEPC was designed to meet the CEPC's requirements. For the geometry of vertex detector is long barrel with no endcap, and current silicon lacks a complete digitization model, precise estimation of cluster size particularly causing by particle with large incident angle is needed. Testbeam results were conducted at the Beijing Synchrotron Radiation Facility (BSRF) to evaluate cluster size dependence on different incident angles and threshold settings. Experimental results confirmed that cluster size increases with incident angle. Simulations using the Allpix$^2$ framework replicated experimental trends at small angles but exhibited discrepancies at large angles, suggesting limitations in linear electric field assumptions and sensor thickness approximations. The results from both testbeam and simulations have provided insights into the performance of the TaichuPix chip at large incident angles, offering a crucial foundation for the establishment of a digital model and addressing the estimation of cluster size in the forward region of the long barrel. Furthermore, it offers valuable references for future iterations of TaichuPix, the development of digital models, and the simulation and estimation of the vertex detector's performance.
format	Preprint
id	arxiv_https___arxiv_org_abs_2503_05415
institution	arXiv
publishDate	2025
record_format	arxiv
spellingShingle	Beam test result and digitization of TaichuPix-3: A Monolithic Active Pixel Sensors for CEPC vertex detector Lu, Hancen Zhang, Tianyuan Xu, Chang Li, Shuqi Huang, Xinhui Zhou, Jia Yan, Ziyue Wang, Wei Zeng, Hao Jia, Xuewei Hu, Yiming Zhang, Xiaoxu Liang, Zhijun Wei, Wei Zhang, Ying Wei, Xiaomin Wu, Tianya Zhang, Lei Qi, Ming Hu, Jun Fu, Jinyu Zhang, Hongyu Li, Gang Wu, Linghui Dong, Mingyi Li, Xiaoting Casanova, Raimon Zhang, Liang Dong, Jianing Wang, Jia Zheng, Ran Lu, Weiguo Grinstein, Sebastian da Costa, João Guimarães Instrumentation and Detectors High Energy Physics - Experiment The Circular Electron-Positron Collider (CEPC), as the next-generation electron-positron collider, is tasked with advancing not only Higgs physics but also the discovery of new physics. Achieving these goals requires high-precision measurements of particles. Taichu seires, Monolithic Active Pixel Sensor (MAPS), a key component of the vertex detector for CEPC was designed to meet the CEPC's requirements. For the geometry of vertex detector is long barrel with no endcap, and current silicon lacks a complete digitization model, precise estimation of cluster size particularly causing by particle with large incident angle is needed. Testbeam results were conducted at the Beijing Synchrotron Radiation Facility (BSRF) to evaluate cluster size dependence on different incident angles and threshold settings. Experimental results confirmed that cluster size increases with incident angle. Simulations using the Allpix$^2$ framework replicated experimental trends at small angles but exhibited discrepancies at large angles, suggesting limitations in linear electric field assumptions and sensor thickness approximations. The results from both testbeam and simulations have provided insights into the performance of the TaichuPix chip at large incident angles, offering a crucial foundation for the establishment of a digital model and addressing the estimation of cluster size in the forward region of the long barrel. Furthermore, it offers valuable references for future iterations of TaichuPix, the development of digital models, and the simulation and estimation of the vertex detector's performance.
title	Beam test result and digitization of TaichuPix-3: A Monolithic Active Pixel Sensors for CEPC vertex detector
topic	Instrumentation and Detectors High Energy Physics - Experiment
url	https://arxiv.org/abs/2503.05415