Optimization of singly-charged particles identification with the AMS02 RICH detector by a machine learning method

IF 4.2 3区物理与天体物理 Q1 ASTRONOMY & ASTROPHYSICS

Astroparticle Physics Pub Date : 2025-05-09 DOI:10.1016/j.astropartphys.2025.103134

Georgi Vasilev, Galina Vankova-Kirilova, Galina Bozhkova

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引用次数: 0

Abstract

AMS-02 is a detector currently in operation onboard the International Space Station (ISS). One of the main scientific goals of the spectrometer is the measurement of charged particle fluxes. The detector design makes possible the identification of particles and antiparticles by precise measurement of particle momentum in the AMS-02 Silicon Tracker, and velocity in the Cherenkov (RICH) detector. The RICH is able to measure the isotopic composition of the light elements (up to charge Z = 5) in the kinetic energy range from a few GeV/n to about 10 GeV/n. However, the velocity reconstruction for charge 1 particles is particularly challenging due to the low number of photons they produce in the RICH detector which can lead to wrong event reconstruction. In this paper, we show the high potential of the Multilayer Perceptron deep learning model (MLP-BFGS) for identification of signal and the background due to interactions inside the AMS-02 detector, and to significantly improve particle identification by its mass.

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基于机器学习方法的AMS02 RICH探测器单带电粒子识别优化

AMS-02是目前在国际空间站（ISS）上运行的探测器。光谱仪的主要科学目标之一是测量带电粒子的通量。通过精确测量AMS-02硅跟踪器中的粒子动量和切伦科夫（RICH）探测器中的速度，该探测器的设计使粒子和反粒子的识别成为可能。RICH能够在动能范围从几个GeV/n到大约10 GeV/n的范围内测量轻元素（直到电荷Z = 5）的同位素组成。然而，电荷1粒子的速度重建尤其具有挑战性，因为它们在RICH探测器中产生的光子数量很少，这可能导致错误的事件重建。在本文中，我们展示了多层感知器深度学习模型（MLP-BFGS）在识别AMS-02探测器内部相互作用引起的信号和背景方面的高潜力，并显着提高了粒子质量识别。

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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来源期刊

Astroparticle Physics 地学天文-天文与天体物理

CiteScore

8.00

自引率

2.90%

发文量

审稿时长

79 days

期刊介绍： Astroparticle Physics publishes experimental and theoretical research papers in the interacting fields of Cosmic Ray Physics, Astronomy and Astrophysics, Cosmology and Particle Physics focusing on new developments in the following areas: High-energy cosmic-ray physics and astrophysics; Particle cosmology; Particle astrophysics; Related astrophysics: supernova, AGN, cosmic abundances, dark matter etc.; Gravitational waves; High-energy, VHE and UHE gamma-ray astronomy; High- and low-energy neutrino astronomy; Instrumentation and detector developments related to the above-mentioned fields.