Characterization of CharTPix-180A, a strip-shaped monolithic sensor for the STCF inner tracker
Abstract
The Super Tau-Charm Facility (STCF) is a future high-luminosity electron-positron collider operating in the center-of-mass energy range of 2 to 7 GeV. The monolithic active pixel sensor (MAPS) is one of the options being considered for the STCF inner tracking detector. This application requires a MAPS capable of providing simultaneous position, time, and charge measurements under a constrained power budget of approximately 50 mW/cm2. To address these requirements, a baseline sensor concept featuring a strip-shaped pixel geometry has been proposed to balance power consumption and detection performance. The first prototypes of this concept, referred to as CharTPix-180A, have been developed to evaluate the proposed design. Two prototypes with different design focuses were characterized in this study. An analog readout prototype, CharTPix-180A-c4, was used to evaluate the intrinsic sensor behavior, while a fully functional digital readout prototype, CharTPix-180A-c3, was used to investigate the overall sensor functionality on a small scale. Electrical, radioactive-source, and beam tests were performed to characterize the prototypes. The measured detection efficiency exceeded 99%, the fake-hit rate was below 10−3 /pixel/s, and the spatial resolution was better than 10 μm. A best time resolution of 37 ns was achieved, and the power consumption was about 50 mW/cm2. These results support the feasibility of the strip-shaped MAPS concept for the STCF inner tracker and provide guidance for further design optimization.
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BibTeX
@misc{zhang2026characterization,
title = {{Characterization of CharTPix-180A, a strip-shaped monolithic sensor for the STCF inner tracker}},
author = {Ruiyang Zhang and Dongwei Xuan and Hao Han and Xinyu Bin and Lailin Xu and Jiajun Qin and Lei Zhao and Le Xiao and Xiangming Sun and Jianbei Liu},
howpublished = {arXiv},
year = {2026},
month = oct,
doi = {10.48550/arxiv.2610.27595},
eprint = {2610.27595},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2610.27595},
note = {CC BY-NC-ND 4.0},
}
RIS
TY - UNPB
TI - Characterization of CharTPix-180A, a strip-shaped monolithic sensor for the STCF inner tracker
AU - Ruiyang Zhang
AU - Dongwei Xuan
AU - Hao Han
AU - Xinyu Bin
AU - Lailin Xu
AU - Jiajun Qin
AU - Lei Zhao
AU - Le Xiao
AU - Xiangming Sun
AU - Jianbei Liu
PY - 2026
DA - 2026/10/20
PB - arXiv
DO - 10.48550/arxiv.2610.27595
UR - https://arxiv.org/abs/2610.27595
AB - The Super Tau-Charm Facility (STCF) is a future high-luminosity electron-positron collider operating in the center-of-mass energy range of 2 to 7 GeV. The monolithic active pixel sensor (MAPS) is one of the options being considered for the STCF inner tracking detector. This application requires a MAPS capable of providing simultaneous position, time, and charge measurements under a constrained power budget of approximately 50 mW/cm^2. To address these requirements, a baseline sensor concept featuring a strip-shaped pixel geometry has been proposed to balance power consumption and detection performance. The first prototypes of this concept, referred to as CharTPix-180A, have been developed to evaluate the proposed design. Two prototypes with different design focuses were characterized in this study. An analog readout prototype, CharTPix-180A-c4, was used to evaluate the intrinsic sensor behavior, while a fully functional digital readout prototype, CharTPix-180A-c3, was used to investigate the overall sensor functionality on a small scale. Electrical, radioactive-source, and beam tests were performed to characterize the prototypes. The measured detection efficiency exceeded 99%, the fake-hit rate was below 10^−3 /pixel/s, and the spatial resolution was better than 10 μm. A best time resolution of 37 ns was achieved, and the power consumption was about 50 mW/cm^2. These results support the feasibility of the strip-shaped MAPS concept for the STCF inner tracker and provide guidance for further design optimization.
ER -