Data Acquisition System in the First Commissioning Run of the J-PARC E16 Experiment
Data Acquisition System in the First Commissioning Run of the J-PARC E16 Experiment
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J-PARC E16 实验首次调试运行中的数据采集系统
DOI：
10.1109/tns.2021.3087635
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发表时间：
2021
影响因子：
1.8
通讯作者：
T.N. Takahashi 他28名
中科院分区：
文献类型：
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作者：
南 吏玖;石川 健治;堤 隆嘉;近藤 博基;関根 誠;小田 修;堀 勝;T.N. Takahashi 他28名
J-PARC E16 是一项通过系统测量原子核中矢量介子光谱变化来研究强子质量起源的实验。矢量介子衰变对的测量将提供正常核密度中手性对称性部分恢复的信息。为了解决脉冲堆积问题并实现对10 MHz量级反应速率背景的良好辨别，数据采集（DAQ）系统采用APV25和DRS4波形采样芯片。触发速率和数据速率预计分别为 1 kHz 和 120–330 MiB/s。开发了用于读出 APV25 和 DRS4 的 DAQ 系统，其中事件通过公共触发器和标签数据进行同步。 Beam 的首次调试名为 Run-0a，于 2020 年 6 月进行，完成了设计设置的约 1/4。 Run-0a 中的 DAQ 工作触发率为 300 Hz，主要瓶颈是 APV25 的大数据量。 DAQ系统的进一步优化将提高性能。
J-PARC E16 is an experiment to examine the origin of hadron mass through a systematic measurement of spectral changes of vector mesons in nuclei. The measurement ofpairs from the decay of vector mesons will provide the information of the partial restoration of the chiral symmetry in a normal nuclear density. To resolve a pulse pile-up and achieve good discrimination ofandfrom the background of a reaction rate of an order of 10 MHz, the data acquisition (DAQ) system uses waveform sampling chips of APV25 and DRS4. The trigger rate and data rate are expected to be 1 kHz and 120–330 MiB/s, respectively. The DAQ system for readout of APV25 and DRS4 were developed, where events were synchronized by common trigger and tag data. The first commissioning in beam, called Run-0a, was performed in June 2020 with about 1/4 of the designed setup. The DAQ worked with a trigger rate of 300 Hz in the Run-0a and the main bottleneck was a large data size of APV25. Further optimization of the DAQ system will improve the performance.
J-PARC E16 实验
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