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arXiv 2006.08562physics.ins-dethep-ex
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基于GEM的TPC读出(DESY模块)的最新性能研究

Recent Performance Studies of the GEM-based TPC Readout (DESY Module)

Ties Behnke, Ralf Diener, Ulrich Einhaus, Uwe Krämer, Paul Malek, Oliver Schäfer, Mengqing Wu

摘要:

对于计划中的国际直线对撞机(ILC)上的国际大型探测器(ILD),预计将时间投影室(TPC)作为主要的跟踪探测器。为了达到所需的点分辨率,微模式气体检测器(MPGD)将用于放大阶段。一个读出模块使用的堆栈的三个气体电子倍增器(GEM)的气体放大在DESY开发和测试在DESY II测试束设施。在介绍了读出模块和基础设施的测试束设施,性能相关的单点和双击中的分辨率,这些模块的。其次是系统的粒子识别能力的结果,使用特定的能量损失dE/dx,和模拟研究,旨在调查和量化高粒度对dE/dx分辨率的影响。此外,还介绍了一种新的和改进的TPC场笼和用于测试束的LYCORIS大面积硅带望远镜。LYCORIS光束望远镜预计将提供粒子轨迹的精确参考,以验证大型TPC原型测量的动量分辨率。为此,它正在所谓的PCMAG(持续电流磁铁)内的测试束设施中进行安装和测试。

英文摘要:

For the International Large Detector (ILD) at the planned International Linear Collider (ILC) a Time Projection Chamber (TPC) is foreseen as the main tracking detector. To achieve the required point resolution, Micro-Pattern Gaseous Detectors (MPGD) will be used in the amplification stage. A readout module using a stack of three Gas Electron Multipliers (GEM) for gas amplification was developed at DESY and tested at the DESY II Test Beam Facility. After introducing the readout module and the infrastructure at the test beam facility, the performance related to single point and double-hit resolution of three of these modules is presented. This is followed by results on the particle identification capabilities of the system, using the specific energy loss dE/dx, and simulation studies, aimed to investigate and quantify the impact of high granularity on dE/dx resolution. In addition, a new and improved TPC field cage and the LYCORIS Large-Area Silicon-Strip Telescope for the test beam are described. The LYCORIS beam telescope is foreseen to provide a precise reference of the particle trajectory to validate the momentum resolution measured with a large TPC prototype. For this purpose, it is being installed and tested at the test beam facility within the so-called PCMAG (Persistent Current Magnet).

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