v-Angra实验的前端控制系统和精确阈值配置
Front-end control system and precise threshold configuration of the v-Angra experiment
摘要：
v-Angra实验旨在估计Angra II核反应堆中反中微子的通量。这种通量与裂变过程中释放的热能成比例，因此可以用来推断在一定时期内燃烧的燃料量。为此，v-Angra合作开发了一个反中微子探测器和一个完整的采集系统，以读取和存储其传感器产生的信号。整个探测系统已安装在一个集装箱实验室内，该实验室位于安格拉II号核反应堆的限制区内，位于核反应堆圆顶旁边。该系统应该独立工作几年，以收集足够的数据，以便验证实验。探测器的读出电子设备及其环境条件是实验的关键部分，它们应该自主工作，并受到远程控制和监测。此外，阈值配置是实验的中心问题，因为反中微子粒子在检测器中产生低能量信号，需要仔细调整所有检测器通道，以使系统能够检测到与单光子产生的信号一样低的信号。为此，开发了一个嵌入式系统，并将其集成到Angra II工厂集装箱中安装的检测设备中，现在可以运行，并可供v-Angra协作使用。本文的目的是描述拟议的嵌入式系统，并提出在其调试阶段所取得的成果。
英文摘要：
The v-Angra experiment aims to estimate the flux of antineutrino particles coming out from the Angra II nuclear reactor. Such flux is proportional to the thermal power released in the fission process and therefore can be used to infer the quantity of fuel that has been burned during a certain period. To do so, the v-Angra Collaboration has developed an antineutrino detector and a complete acquisition system to readout and store the signals generated by its sensors. The entire detection system has been installed inside a container laboratory placed beside the dome of the nuclear reactor, in a restricted zone of the Angra II site. The system is supposed to work standalone for a few years in order to collect enough data so that the experiment can be validated. The detector's readout electronics and its environmental conditions are crucial parts of the experiment and they should work autonomously and be controlled and monitored remotely. Additionally, threshold configuration is a central issue of the experiment since antineutrino particles produce low energy signals in the detector, being necessary to carefully adjust it for all the detector channels in order to make the system capable of detecting signals as low as those generated by single photons. To this end, an embedded system was developed and integrated to the detection apparatus installed in the container at the Angra II site and is now operational and accessible to the v-Angra Collaboration. This article aims at describing the proposed embedded system and presenting the results obtained during its commissioning phase.
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