ALICE FoCal量能器电荷读出电子学研究

Charge readout electronics study for the ALICE FoCal calorimeter

    摘要
  • 摘要: 为满足ALICE FoCal量能器升级中对高精度电荷读出和高速数据传输的需求，中国原子能科学研究院开展了基于现场可编程门阵列（FPGA）线性放电技术的高精度读出电子学研究。搭建了塑料闪烁体与SiPM耦合的测试平台，并开发了一套读出电子学原型系统。该系统采用放大器芯片配合表面贴装电容和电阻搭建模拟前端，并利用FPGA线性放电技术实现高精度电荷数字化，同时集成了多板同步、数据获取和数据压缩功能，能够满足FoCal中密集SiPM信号读取以及高速数据传输和处理需求。实验结果表明，该系统实现了1100 pC的动态范围和0.25 pC的电荷分辨率，能有效应对FoCal的挑战。

     

    Abstract: High-precision readout electronics based on field-programmable gate array (FPGA) linear discharge technology were developed at the China Institute of Atomic Energy for the ALICE FoCal upgrade, which requires high-precision charge readout and high-speed data transmission. A test platform with plastic scintillators coupled to Silicon photomultiplier tubes (SiPMs) was established, and a prototype readout electronics system was developed. The system used amplifier chips and surface-mount components for the analog front-end and FPGA-based linear discharge technology for charge digitization. Additionally, the system incorporated multi-board synchronization, data acquisition, and compression functions, thus meeting the demands for dense SiPM signal reading, high-speed data transmission, and processing. Experimental results demonstrate the system's capability to achieve a dynamic range of 1100 pC and a charge resolution of 0.25 pC, effectively addressing the challenges posed by FoCal.

     

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