Development and studies of a time projection chamber with GEMs
Development and studies of a time projection chamber with GEMs
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GEM 时间投影室的开发与研究
DOI：
10.1016/j.nima.2004.07.128
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发表时间：
2004
影响因子：
1.4
通讯作者：
P. Wienemann
中科院分区：
文献类型：
--
作者：
J. Kaminski;M. Ball;F. Bieser;M. Janssen;S. Kappler;B. Ledermann;T. Muller;M. Ronan;P. Wienemann
未来的高能物理实验对中央跟踪系统的质量有着严格的要求。为了评估时间投影室（TPC）与微模式气体放大级的组合是否能够满足这些需求，小型圆柱形原型配备了两个气体电子倍增器（GEM）和连接到高度集成的前端电子设备的微垫。在欧洲核子研究中心质子同步加速器的早期测试中，该系统在高速粒子束中（但没有磁场），可以证明其高效率和良好的单垫行空间分辨率。现在，我们提出了补充测量与此系统在高磁场高达5 T在DESY（汉堡，德国）。详细的结果给出的空间分辨率依赖于参数，如漂移距离，有效气体增益和磁场。结果表明，横向单垫行空间分辨率低至（53±5）μm，并证实了以前发表的直线对撞机大规模运行条件下束流试验外推模型。
Future high-energy physics experiments will have stringent requirements on the quality of their central tracking systems. In order to evaluate whether a Time Projection Chamber (TPC) in combination with a Micro-Pattern Gas Amplification stage can meet these demands, a small cylindrical prototype has been equipped with two Gas Electron Multipliers (GEMs) and micropads connected to highly integrated front-end electronics. In earlier tests with this system in high-rate particle beams—but without magnetic field—at the Proton-Synchrotron at CERN, high efficiencies and good single-pad-row spatial resolutions could be demonstrated. We now present complementary measurements with this system in high magnetic fields up to 5T at DESY (Hamburg, Germany). Detailed results are given for the spatial resolution dependence on parameters such as drift distance, effective gas gain and magnetic field. Transverse single-pad-row spatial resolution was found to be as low as (53±5)μm and a previously published model for the extrapolation of the beam test resulting in large scale operation conditions at the Linear Collider could be confirmed.