The Data Acquisition System for LZ
The Data Acquisition System for LZ
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DOI：
10.1088/1748-0221/11/02/c02072
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发表时间：
2016-02-01
影响因子：
1.3
通讯作者：
Druszkiewicz, E.
中科院分区：
文献类型：
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作者：
Druszkiewicz, E.
LZ实验的数据采集系统是安装在桑福德地下研究设施（SURF）的10吨重的暗物质探测器，将收集788个光电倍增管（PMT）的信号。由于来自时间投影室PMT的信号将通过双增益放大器，DAQ系统将使用定制的32通道基于FPGA的数字信号处理器从总共1276个通道收集波形。经过适当调节的信号将以14位分辨率在100 MHz下进行数字化。根据小规模原型系统的实际测量，LZ DAQ预计能够处理1，500 MB/s的最大数据速率。在校准期间，估计仅利用了33%的系统资源。用于事件选择的数字滤波器的总吞吐量超过595，000 MB/s。事件选择决策基于例如闪烁（S1）和光致发光S2光的量、S1和S2命中模式以及总能量沉积。
The Data Acquisition System of the LZ experiment, the 10-tonne dark matter detector to be installed at the Sanford Underground Research Facility (SURF), will collect signals from 788 photomultiplier tubes (PMTs). Because the signals from the time projection chamber PMTs will be passed through dual-gain amplifiers, the DAQ system will collect waveforms from a total of 1276 channels, using custom built, 32-channel, FPGA-based digital signal processors. The appropriately conditioned signals will be digitized at 100 MHz with 14-bit resolution. Based on actual measurements with a small-scale prototype system, the LZ DAQ is expected to be able to handle a maximum data rate of 1,500 MB/s. During calibrations, it is estimated that only 33% of the system resources are utilized. The digital filters that are used for event selection operate with an aggregate throughput in excess of 595,000 MB/s. Event selection decisions are based on, for example, the amount of scintillation (S1) and photoluminescence S2 light, S1 and S2 hit-patterns, and total energy deposition.