First demonstration of 3D optical readout of a TPC using a single photon sensitive Timepix3 based camera
First demonstration of 3D optical readout of a TPC using a single photon sensitive Timepix3 based camera
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DOI：
10.1088/1748-0221/14/06/p06001
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发表时间：
2018-10
影响因子：
1.3
通讯作者：
A. Roberts;P. Svihra;A. Al-Refaie;Heinz Graafsma;J. Küpper;K. Majumdar;K. Mavrokoridis;A. Nomer
中科院分区：
文献类型：
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作者：
A. Roberts;P. Svihra;A. Al-Refaie;Heinz Graafsma;J. Küpper;K. Majumdar;K. Mavrokoridis;A. Nomer
ARIADNE项目正在为两相液体氩时间投影室（LArTPC）开发创新的光学读出技术。光学读出提出了一个令人兴奋的替代目前的范式的电荷读出。光学读出是简单的、可扩展的和成本有效的。本文首次演示了TPC的三维光学读出，使用CF 4气体作为原理的证明。宇宙射线和镅-241 α源都在100毫巴的CF 4中成像。将基于Timepix 3（TPX 3）的相机与像增强器相结合，研制了一种单光子敏感相机。当TPX 3的一个像素被命中时，产生一个包含关于命中的所有信息的数据包。该数据包包含像素的x、y坐标、到达时间（ToA）和阈值时间（ToT）信息。通过结合漂移速度和ToA信息来确定TPC中命中的z位置。通过将像素的x、y位置与该计算的z位置组合来执行3D事件重建。量热法是使用超过阈值的时间来进行的，这是对撞击强度的测量。
The ARIADNE project is developing innovative optical readout technologies for two-phase liquid Argon time projection chambers (LArTPCs). Optical readout presents an exciting alternative to the current paradigm of charge readout. Optical readout is simple, scalable and cost effective. This paper presents first demonstration of 3D optical readout of TPC, using CF4 gas as a proof of principle. Both cosmic rays and an Americium-241 alpha source have been imaged in 100 mbar CF4. A single-photon sensitive camera was developed by combining a Timepix3 (TPX3) based camera with an image intensifier. When a pixel of TPX3 is hit, a packet containing all information about the hit is produced. This packet contains the x,y coordinates of the pixel, time of arrival (ToA) and time over threshold (ToT) information. The z position of the hit in the TPC is determined by combining drift velocity with ToA information. 3D event reconstruction is performed by combining the pixel's x,y location with this calculated z position. Calorimetry is performed using time over threshold, a measure of the intensity of the hit.