Beam Test Characterization of Silicon Microstrip Detector Flight-Model Ladders for the AMS-02 Upgrade
Abstract
The AMS-02 experiment plans to install a new silicon microstrip tracker layer (Layer-0) on top of the existing detector, increasing the cosmic-ray acceptance by a factor of 3. Layer-0 employs a design in which multiple silicon microstrip detectors (SSDs) are connected in series to form long detector ladders. We present a detailed performance study of the flight-model ladders using a 350~GeV mixed hadron beam at the CERN SPS. The study focuses on the following aspects: (i) the performance of ladders with different numbers of SSDs, for which the intrinsic spatial resolution at normal incidence varies from to for ladders composed of 8 to 12 SSDs; (ii) the response consistency for particles impacting on the \emph{Head} and \emph{Tail} regions of the ladder; and (iii) the dependence of the detector performance on the particle incidence angle.
Cite
@article{arxiv.2603.25085,
title = {Beam Test Characterization of Silicon Microstrip Detector Flight-Model Ladders for the AMS-02 Upgrade},
author = {Dexing Miao and Giovanni Ambrosi and Mattia Barbanera and Baasansuren Batsukh and Hengyi Cai and Mengke Cai and Xudong Cai and Yuman Cai and Yuan-Hann Chang and Shanzhen Chen and Hsin-Yi Chou and Xingzhu Cui and Mingyi Dong and Matteo Duranti and Ke Gong and Mingjie Feng and Valerio Formato and Yisheng Fu and Daojin Hong and Maria Ionica and Xiaojie Jiang and Yaozu Jiang and Liangchenglong Jin and Shengjie Jin and Vladimir Koutsenko and Qinze Li and Tiange Li and Zuhao Li and Chih-Hsun Lin and Changcheng Liu and Cong Liu and Hanbing Liu and Pingcheng Liu and Alberto Oliva and Ji Peng and Wenxi Peng and Rui Qiao and Shuqi Sheng and Tianyu Shi and Gianluigi Silvestre and Zetong Sun and Congcong Wang and Feng Wang and Hongbo Wang and Zhijie Wang and Zibing Wu and Zhiyu Xiang and Suyu Xiao and Weiwei Xu and Zixuan Yan and Haotian Yang and Sheng Yang and Yuhang You and Xuhao Yuan and Yuan Yuan and Fengze Zhang and Xiyuan Zhang and Zijun Xu and Jianchun Wang},
journal= {arXiv preprint arXiv:2603.25085},
year = {2026}
}