Position Encoding Readout Electronics of Large Area Micromegas Detectors aiming for Cosmic Ray Muon Imaging
Position Encoding Readout Electronics of Large Area Micromegas Detectors aiming for Cosmic Ray Muon Imaging
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DOI：
10.1109/nss/mic42101.2019.9060024
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发表时间：
2019-10
期刊：
影响因子：
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通讯作者：
Jiang Pan;C. Feng;Zhiyong Zhang;Yu Wang;Haolei Chen;Jiaqi Wang;Yichao Wang;Junchen Wang;Danyang Zhu;Jianxin Feng;Shubin Liu
中科院分区：
文献类型：
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作者：
Jiang Pan;C. Feng;Zhiyong Zhang;Yu Wang;Haolei Chen;Jiaqi Wang;Yichao Wang;Junchen Wang;Danyang Zhu;Jianxin Feng;Shubin Liu
在中国科学技术大学粒子探测与电子学国家重点实验室，我们提出了一个利用多个40×40 cm 2 Micromegas探测器模块进行大面积宇宙线μ子成像的方案。每个检测器模块需要2000个条带通道，这对读出电子器件的成本和复杂性带来了巨大挑战。为了克服这些困难，提出了一种位置编码读出算法，以减少读出通道的数量，这是证明了图论的欧拉路径。为了初步验证探测器制作的关键技术和图像重建的可行性，建立了一个由6个Micromegas模块组成的原型系统，每个模块的尺寸为15×15 cm 2。该原型系统具有总共4608个阳极条（对于一个Micromegas模块，在每个X或Y维度中384个条）。使用位置编码方法，仅需要768个电子通道。为了实现低噪声、高密度的读出，采用了由四个前端卡（FEC）和一个数据采集模块（DCM）组成的光纤电子学系统。在联合测试中，成功记录了地面宇宙线撞击的电荷和位置，并重建了径迹，验证了位置编码读出用于μ子成像的可行性。
In the State Key Laboratory of Particle Detection and Electronics of USTC, we have proposed a large area cosmic ray muon imaging project with multiple 40×40 cm2 Micromegas detector modules. 2000 strip channels are required for each detector module, which introduces great challenges to the cost and complexity of readout electronics. To overcome the challenges, a position encoding readout algorithm was proposed to reduce the number of readout channels, which is demonstrated by the Eulerian path of graph theory. In this paper, a prototype system with six Micromegas modules, each with the size of 15×15 cm2, has been built to preliminarily verify the key techniques of detector fabrication and the feasibility of image reconstruction. This prototype system has a total of 4608 anode strips (384 strips in each X or Y dimension for one Micromegas module). With the position encoding method, only 768 electronic channels are required. An optical fiber-based electronics system, which is composed of four front-end cards (FECs) and a data collection module (DCM) is adopted for the purpose of low noise, high density readout. During joint tests, the charge and position of ground-based cosmic ray hits were recorded and the tracks were reconstructed successfully, which verified the feasibility of applying position encoding readout to muon imaging.