论文标题
通过横梁测试，具有大量孔像宝石的门控装置的ILC TPC的基于宝石的读数模块的性能评估
Performance evaluation of a GEM-based readout module for the ILC TPC with a large aperture GEM-like gating device by a beam test
论文作者
论文摘要
使用后坐力质量技术，在国际线性对撞机（ILC）上对希格斯玻色子进行精确测量需要高动量分辨率。 The International Large Detector (ILD) is designed to meet this requirement by an MPGD-readout Time Projection Chamber (TPC) providing about 200 sample points each with a spatial resolution of 100 $μ$m operated in a magnetic field of 3.5 T. However, there is a potential problem that many positive ions generated in the gas amplification process in the end-plane detector modules would flow back into the drift volume of the TPC and distort its electric field.在达到漂移体积之前，必须通过门控装置去除这些阳性离子。我们已经开发了一种像宝石一样的门控装置（门控箔），以防止离子向后流到漂移量并评估其性能。性能测量是在DESY进行的，使用5 GEV电子束和1 T磁铁场中的大型原型TPC进行。我们已经测量了配备门控箔和门控装置的电子传输速率的MPGD模块的空间分辨率。这是拥有高性能门控件的“无线” TPC的世界第一个测试梁实验。在本报告中，我们介绍了有关空间分辨率和电子传输速率的结果。
A high momentum resolution is required for the precision measurement of Higgs boson at the International Linear Collider (ILC) using the recoil mass technique. The International Large Detector (ILD) is designed to meet this requirement by an MPGD-readout Time Projection Chamber (TPC) providing about 200 sample points each with a spatial resolution of 100 $μ$m operated in a magnetic field of 3.5 T. However, there is a potential problem that many positive ions generated in the gas amplification process in the end-plane detector modules would flow back into the drift volume of the TPC and distort its electric field. These positive ions must be removed by a gating device before reaching the drift volume. We have developed a GEM-like gating device (gating foil) to prevent ions from back-flowing to the drift volume and evaluated its performance. The performance measurement was carried out at DESY, using a 5 GeV electron beam and the Large Prototype TPC in a 1 T magnet field. We have measured the spatial resolution of our MPGD module equipped with the gating foil and the electron transmission rate of the gating device. This was the world first test beam experiment of a "wireless" TPC equipped with a high performance gating device. In this report, we present our results on the spatial resolution and the electron transmission rate.
