AMS-02 RICH探测器：现状、最新结果和物理前景

IF 1.4 3区物理与天体物理 Q3 INSTRUMENTS & INSTRUMENTATION

Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment Pub Date : 2026-06-01 Epub Date: 2026-02-05 DOI:10.1016/j.nima.2026.171364

Jianan Xiao , Bowen Huang , Hai Chen , Francesca Giovacchini , Carlos Delgado , Jorge Casaus , AMS Collaboration

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引用次数: 0

摘要

自2011年以来，阿尔法磁谱仪（AMS-02）一直在国际空间站上对宇宙射线通量进行精确测量。其同位素识别能力的核心是环形成像切伦科夫探测器（RICH），它可以高精度地确定粒子速度和电荷。本文介绍了RICH探测器在太空运行14年后的现状和性能。对气凝胶散热器折射率的对准和标定进行了精确的交叉检验。在此基础上，提出了一种基于极大似然估计的速度重建算法，实现了锂的速度分辨率为5.1×10−4，铍的速度分辨率为4.0×10−4。这些校准和重建的进展对于未来光同位素的高精度分析至关重要，这为宇宙射线传播模型提供了必要的约束。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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The AMS-02 RICH detector: Status, latest results, and physics prospects

Since 2011, the Alpha Magnetic Spectrometer (AMS-02) has been conducting precision measurement of cosmic-ray fluxes on the International Space Station. Central to its isotope identification capability is the Ring Imaging Cherenkov Detector (RICH), which determines particle velocity and charge with high accuracy. In this paper, we present the status and performance of the RICH detector after more than 14 years of operation in space. The alignment and calibration on the refractive index of aerogel radiators are cross checked with precision. Furthermore, a new velocity reconstruction algorithm based on the Maximum Likelihood Estimation is introduced, which achieves velocity resolution of

5.1 \times 1 0^{- 4}

for lithium and

4.0 \times 1 0^{- 4}

for beryllium. These calibration and reconstruction advancements are critical for the high-precision future analysis of light isotopes, which provide essential constraints on the cosmic-ray propagation models.

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来源期刊

Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment 物理-光谱学

CiteScore

3.20

自引率

21.40%

发文量

787

审稿时长

1 months

期刊介绍： Section A of Nuclear Instruments and Methods in Physics Research publishes papers on design, manufacturing and performance of scientific instruments with an emphasis on large scale facilities. This includes the development of particle accelerators, ion sources, beam transport systems and target arrangements as well as the use of secondary phenomena such as synchrotron radiation and free electron lasers. It also includes all types of instrumentation for the detection and spectrometry of radiations from high energy processes and nuclear decays, as well as instrumentation for experiments at nuclear reactors. Specialized electronics for nuclear and other types of spectrometry as well as computerization of measurements and control systems in this area also find their place in the A section. Theoretical as well as experimental papers are accepted.