Validation of Pulse Shape Simulations for an AGATA Prototype Detector

Validation of Pulse Shape Simulations for an AGATA Prototype Detector
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AGATA 原型探测器的脉冲形状仿真验证

DOI:
10.1109/tns.2009.2021842
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发表时间:
2009
影响因子:
1.8
通讯作者:
Dimmock M
Dimmock M
中科院分区:
工程技术3区
文献类型:
--
作者:
Dimmock M

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采用符合模式扫描了AGATA对称同轴高纯锗探测器。来自36重分段外触点和中心触点的电荷脉冲形状被存储用于分布在十个深度(z)上的超过2000个精确确定的3-D相互作用位置处的事件。生成每个位置处的37个平均实验脉冲形状的数据库(基础)。使用电场模拟代码多几何模拟(MGS)在1.0 mm立方网格上生成几何形状的脉冲形状。在每个位置和MGS基础上的实验脉冲形状之间的最小化产生了在x-y平面中1.5和3.0 mm之间的平均位移。这些位移的矢量在检测器中心的方向上偏置。这种效应归因于串扰。导数串扰的最大水平被测量并且示出为534%ns。然而,由于采购系统中没有全球时钟,无法在整个基础上加以说明。
An AGATA symmetric, coaxial, high-purity germanium (HPGe) detector has been scanned in coincidence mode. Charge pulse shapes from the 36-fold segmented outer contacts and center contact were stored for events at more than 2000 precisely determined 3-D interaction positions spread over ten depths (z). A database (basis) of the 37 average experimental pulse shapes at each position was generated. The electric field simulation code Multi Geometry Simulation (MGS) was used to generate the pulse shapes for the geometry on a 1.0-mm cubic grid. A minimization between the experimental pulse shapes at each position and the MGS basis yielded mean displacements of between 1.5 and 3.0 mm in thex-yplane. The vectors of these displacements were biased in the direction of the center of the detector. This effect is attributed to cross-talk. The maximum level of derivative cross-talk was measured and shown to be 534%ns. However due to the lack of a global clock in the acquisition system, it could not be accounted for throughout the basis.
各向异性电子漂移速度对封闭式 HPGe 探测器信号形状的影响
影响因子: 1.4
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