The continuous readout stream of the MicroBooNE liquid argon time projection chamber for detection of supernova burst neutrinos
The continuous readout stream of the MicroBooNE liquid argon time projection chamber for detection of supernova burst neutrinos
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DOI：
10.1088/1748-0221/16/02/p02008
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发表时间：
2021-02-01
影响因子：
1.3
通讯作者：
Zhang, C.
中科院分区：
文献类型：
--
作者：
Abratenko, P.;Alrashed, M.;Zhang, C.
MicroBooNE连续读出流是MicroBooNE液态氩气时间投影室（LArTPC）的并行读出流，它可以检测非光束事件，如超新星中微子爆发。由于近地表探测器的位置，超新星中微子的低能量和强烈的宇宙射线背景通量使得触发这些事件非常具有挑战性。相反，MicroBooNE依靠SNEWS（超新星早期预警系统）产生的延迟触发来探测超新星中微子。LArTPC的连续读出产生大量数据，并且需要使用在读出电子器件中的FPGA（现场可编程门阵列）中实现的实时压缩算法（零抑制和霍夫曼压缩）。我们给出了数据约简算法的优化结果，以及它们的运行性能。为了证明连续流探测低能电子的能力，重建了来自停止宇宙射线μ子的米歇尔电子样本，并将其与来自无损触发读出流的类似样本进行了比较。
The MicroBooNE continuous readout stream is a parallel readout of the MicroBooNE liquid argon time projection chamber (LArTPC) which enables detection of non-beam events such as those from a supernova neutrino burst. The low energies of the supernova neutrinos and the intense cosmic-ray background flux due to the near-surface detector location makes triggering on these events very challenging. Instead, MicroBooNE relies on a delayed trigger generated by SNEWS (the Supernova Early Warning System) for detecting supernova neutrinos. The continuous readout of the LArTPC generates large data volumes, and requires the use of real-time compression algorithms (zero suppression and Huffman compression) implemented in an FPGA (field-programmable gate array) in the readout electronics. We present the results of the optimization of the data reduction algorithms, and their operational performance. To demonstrate the capability of the continuous stream to detect low-energy electrons, a sample of Michel electrons from stopping cosmic-ray muons is reconstructed and compared to a similar sample from the lossless triggered readout stream.