Development of the Front-End Electronics for PandaX-III Prototype TPC
Development of the Front-End Electronics for PandaX-III Prototype TPC
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DOI：
10.1109/tns.2019.2907125
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发表时间：
2018-06
影响因子：
1.8
通讯作者：
Danyang Zhu;Shubin Liu;C. Feng;Cheng Li;Jianing Dong;Haolei Chen;Zhen Chen;Jiang Pan
中科院分区：
文献类型：
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作者：
Danyang Zhu;Shubin Liu;C. Feng;Cheng Li;Jianing Dong;Haolei Chen;Zhen Chen;Jiang Pan
粒子和天体物理学氙实验III（PandaX-III）的目的是使用200公斤放射性纯高压气态氙时间投影室（TPC），两端装有Micromegas探测器，寻找无中微子双β衰变（NLDBD）。一个小规模的原型TPC配备了七个Microbulk Micromegas模块已经开发出来。每个Micromegas模块有128个阳极条信号要处理。前端电路由4个前端卡（FEC）组成，具有1024个通道，用于读取Micromegas阳极信号的电荷，整形后的波形，并将压缩后的数据发送到数据采集模块（DCM）。前端电子器件的基石是一个名为AGET的64通道专用集成电路（ASIC），它基于开关电容阵列（SCA）。测试结果表明，在峰值时间为1 μ s，动态范围为1 pC的条件下，前端电路的积分非线性（INL）小于1%，输入端浮置时各读出通道的噪声小于0.9 fC。前端电子与原型TPC的联合测试使用放射源137 Cs和241 Am进行。成功地重建了Micromegas模块的命中图和能谱，结果令人满意。
The particle and astrophysical xenon experiment III (PandaX-III) is aimed to search for the Neutrinoless Double Beta Decay (NLDBD) using 200-kg radio-pure high-pressure gaseous xenon time projection chamber (TPC) with Micromegas detectors at both ends. A small-scale prototype TPC equipped with seven Microbulk Micromegas modules has been developed. Each Micromegas module has 128 anode strip signals to be processed. Highly integrated front-end electronics composed of four front-end cards (FECs) with 1024 channels are designed to read out the charge of Micromegas anode signals digitize the waveform after shaping and send compressed data to the data collection module (DCM). The cornerstone of the front-end electronics is a 64-channel application-specific integrated circuit (ASIC) named AGET, which is based on switched capacitor arrays (SCAs). According to the test results, the integral nonlinearity (INL) of the front-end electronics is less than 1%, and the noise of each readout channel with the input floating is less than 0.9 fC on the condition of 1- $\mu \text{s}$ peaking time and 1-pC dynamic range. Joint tests of front-end electronics with the prototype TPC were carried out using the radioactive sources 137Cs and 241Am. The hit map of the Micromegas modules and the energy spectrum have been reconstructed successfully, and the results are satisfying.