论文标题
GridPix检测器的性能
Performance of the GridPix detector quad
论文作者
论文摘要
带有四个GridPix芯片（称为Quad）的气态像素读数模块已开发为大型时间投影室读数平面的构建块。四边形模块的尺寸为39.6毫米$ \ times $ 28.38毫米，积极的表面覆盖率为68.9％。 GridPix芯片由具有集成放大网格的TimePix3芯片组成，并且具有高效率以检测单个电离电子，从而可以进行精确的轨道位置测量。在较小的时间投影室中安装了四核模块，并在波恩的Elsa加速器上进行了2.5 GEV电子的测量，在那里使用硅望远镜提供参考轨道。在像素平面和漂移方向上，轨道位置测量值的误差都由扩散所主导。该四边形的设计为具有最小的电场不均匀性和扭曲，在像素平面中实现了高于13 $μ$ m的系统学。设置的分辨率为41 $μ$ m，其中四轮检测器的总系统误差为24 $μ$ m。
A gaseous pixel readout module with four GridPix chips, called the quad, has been developed as a building block for a large time projection chamber readout plane. The quad module has dimensions 39.6 mm $\times$ 28.38 mm and an active surface coverage of 68.9%. The GridPix chip consists of a Timepix3 chip with integrated amplification grid and have a high efficiency to detect single ionisation electrons, which enable to make a precise track position measurement. A quad module was installed in a small time projection chamber and measurements of 2.5 GeV electrons were performed at the ELSA accelerator in Bonn, where a silicon telescope was used to provide a reference track. The error on the track position measurement, both in the pixel plane and drift direction, is dominated by diffusion. The quad was designed to have minimum electrical field inhomogeneities and distortions, achieving systematics of better than 13 $μ$m in the pixel plane. The resolution of the setup is 41 $μ$m, where the total systematic error of the quad detector is 24 $μ$m.
