在SIS18重离子束下对CBM实验原型硅跟踪系统的性能进行了测试

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 : 2025-10-13 DOI:10.1016/j.nima.2025.171059

A. Agarwal , K. Agarwal , Z. Ahammed , N. Ahmad , L.J. Ahrens , M. Al-Turany , N. Alam , J. Andary , A. Andronic , H. Appelshäuser , B. Arnoldi-Meadows , B. Artur , M.D. Azmi , M. Bajdel , M. Balzer , A. Bandyopadhyay , V.A. Bâsceanu , J. Becker , M. Becker , A. Belousov , P. Zumbruch

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引用次数: 0

摘要

未来反质子和离子研究设施（FAIR）的压缩重子物质（CBM）实验是一个重离子实验，旨在研究最高重子密度的核物质。对于稀有探针的高统计量测量，目标是高达10 MHz的碰撞率。因此，该实验需要快速和抗辐射探测器、自触发探测器前端、自由流读出架构和在线事件重建。硅跟踪系统（STS）是CBM的主要跟踪探测器，设计用于重建带电粒子的轨迹，效率大于95%，在1 Tm磁场中，粒子动量大于1 GeV/c的相对动量不确定性优于2%，并识别复杂的衰变拓扑。它包括876个双面硅条模块，设置在8个跟踪站中。该探测器的原型由12个模块组成，分布在三个跟踪站中，安装在迷你cbm演示器中。该实验装置是完整CBM探测器的小型前体，由安装在SIS18光束线上的所有主要CBM系统的子单元组成。在2021年至2024年间进行的各种束流运动中，记录了1-2 AGeV的重离子碰撞，平均碰撞率为500 kHz。这样就可以评估STS探测器的工作性能，包括信噪比、电荷分布、时间和位置分辨率、命中重建效率，以及轨迹和顶点重建的潜力。

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Performance of the prototype Silicon Tracking System of the CBM experiment tested with heavy-ion beams at SIS18

The Compressed Baryonic Matter (CBM) experiment at the future Facility for Antiproton and Ion Research (FAIR) is a heavy-ion experiment designed to study nuclear matter at the highest baryonic density. For high-statistics measurements of rare probes, collision rates of up to 10 MHz are targeted. The experiment, therefore, requires fast and radiation-hard detectors, self-triggered detector front-ends, free-streaming readout architecture, and online event reconstruction.

The Silicon Tracking System (STS) is the main tracking detector of CBM, designed to reconstruct the trajectories of charged particles with efficiency larger than 95%, a relative momentum uncertainty better than 2% for particle momenta larger than 1 GeV/c inside a 1 Tm magnetic field, and to identify complex decay topologies. It comprises 876 double-sided silicon strip modules arranged in 8 tracking stations.

A prototype of this detector, consisting of 12 modules arranged in three tracking stations, is installed in the mini-CBM demonstrator. This experimental setup is a small-scale precursor to the full CBM detector, composed of sub-units of all major CBM systems installed on the SIS18 beamline. In various beam campaigns taken between 2021 and 2024, heavy ion collisions at 1–2 AGeV with an average collision rate of 500 kHz have been recorded.

This allows for the evaluation of the operational performance of the STS detector, including signal-to-noise ratio, charge distribution, time and position resolution, hit reconstruction efficiency, and its potential for track and vertex reconstruction.

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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.