Charged particle tracking with the Timepix ASIC
Charged particle tracking with the Timepix ASIC
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DOI：
10.1016/j.nima.2011.09.021
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发表时间：
2012-01-01
影响因子：
1.4
通讯作者：
Xing, Zhou
中科院分区：
文献类型：
--
作者：
Akiba, Kazuyoshi;Artuso, Marina;Xing, Zhou
利用Timepix和Medipix ASIC混合像元组件作为六个传感平面，搭建了一台粒子跟踪望远镜样机。每个望远镜平面由一个1.4厘米(2)组件组成，提供了一个256x256的55µm平方像素阵列。该望远镜在被测装置的位置上实现了2.4微米的指向分辨率。在2009年的光束测试中，该望远镜被用来详细评估两种Timepix混合像素组件的性能：标准平面300微米厚的传感器和285微米厚的双面3D传感器。本文描述了一种能够提取真实电荷的像素器件的电荷校准研究，并报道了电荷收集特性和朗道分布的测量结果。对于倾斜轨道，平面传感器的最佳分辨率为4.0+/-0.1微米；对于垂直轨道，其最佳分辨率为4.4至11微米，具体取决于施加的偏置电压。双面3D传感器的电荷共享显著减少，对于倾斜轨道，最佳分辨率为9.0+/-0.1微米，对于垂直轨道，最佳分辨率为16.0+/-0.2微米。基于这些研究，可以得出结论，Timepix ASIC在作为带电粒子跟踪装置时表现出了良好的性能。(C)2011爱思唯尔B.V.保留所有权利。
A prototype particle tracking telescope was constructed using Timepix and Medipix ASIC hybrid pixel assemblies as the six sensing planes. Each telescope plane consisted of one 1.4 cm(2) assembly, providing a 256 x 256 array of 55 mu m square pixels. The telescope achieved a pointing resolution of 2.4 mu m at the position of the device under test. During a beam test in 2009 the telescope was used to evaluate in detail the performance of two Timepix hybrid pixel assemblies; a standard planar 300 mu m thick sensor, and 285 mu m thick double sided 3D sensor. This paper describes a charge calibration study of the pixel devices, which allows the true charge to be extracted, and reports on measurements of the charge collection characteristics and Landau distributions. The planar sensor achieved a best resolution of 4.0 +/- 0.1 mu m for angled tracks, and resolutions of between 4.4 and 11 mu m for perpendicular tracks, depending on the applied bias voltage. The double sided 3D sensor, which has significantly less charge sharing, was found to have an optimal resolution of 9.0 +/- 0.1 mu m for angled tracks, and a resolution of 16.0 +/- 0.2 mu m for perpendicular tracks. Based on these studies it is concluded that the Timepix ASIC shows an excellent performance when used as a device for charged particle tracking. (C) 2011 Elsevier B.V. All rights reserved.