Development of Multichannel High Time Resolution Data Acquisition System for TOT-ASIC
Development of Multichannel High Time Resolution Data Acquisition System for TOT-ASIC
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DOI：
10.1109/tns.2021.3084144
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发表时间：
2021-08
影响因子：
1.8
通讯作者：
Setsuo Sato;Mizuki Uenomachi;K. Shimazoe
中科院分区：
文献类型：
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作者：
Setsuo Sato;Mizuki Uenomachi;K. Shimazoe
针对超阈值时间（TOT）专用集成电路（ASIC）设计了一种多通道高时间分辨率数据采集（DAQ）系统。所开发的基于现场可编程门阵列的DAQ由每块板144个通道组成，具有以太网读出器，可同时测量能量和定时信息。开发的数据采集卡的测量时间精度降低到62.5 ps。所提出的DAQ与TOT-ASIC可以潜在地用于几个辐射检测应用，如正电子发射断层扫描（PET）和康普顿成像。该数据采集卡应用于PET，称为PET高速网络读出卡（PETNET）。在开发的第一个版本中，PETNET通过实现双倍数据速率方法，具有1 ns的时间精度。这表明该方法可用于使用两个PETNET捕获22Na的电子-正电子对。我们获得了2-D横截面图像，将两个8 × 8探测器相对放置。在开发的第二个版本中，PETNET通过实施延迟线方法具有125或62.5 ps的时间精度。电缆长度测量证明PETNET在光速下的位置分辨率为4.5厘米。为了实现多个PETNET上数据的时间同步，采用了飞行时间法，并将所有数据进行了精确的时间精度比较。
We developed a multichannel high time resolution data acquisition (DAQ) system for time-over-threshold (TOT) application specific integrated circuit (ASIC). The developed field-programmable gate array-based DAQ is composed of 144 channels per board with an Ethernet readout to measure energy and timing information simultaneously. The measured time precision of the developed DAQ board was reduced to 62.5 ps. The proposed DAQ with TOT-ASIC can potentially be used for several radiation detection applications, such as positron emission tomography (PET) and Compton imaging. The DAQ board is applied to PET and named PET readout board with a high-speed network (PETNET). In the first version developed, the PETNET had a time precision of 1 ns by implementing a double data rate method. This demonstrates that this method is useful for capturing electron–positron pairs of 22Na using two PETNETs. We obtained 2-D cross-sectional images placing two $8 \times 8$ detectors facing each other. In the second version developed, the PETNET had a time precision of 125 or 62.5 ps by implementing a delay-line method. Cable length measurements proved that PETNET has a position resolution of 4.5 cm at the speed of light. To synchronize the time of data on several PETNETs, a time-of-flight method was adopted, and all the data were compared with each other with accurate time precision.