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arXiv · 1309.1370

GEM Module Design for the ILD TPC

T. Behnke·F. Müller·A. Münnich·K. Zenker
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Abstract

A Time Projection Chamber (TPC) using micro-pattern gas detectors is planned as the main tracking device for a detector at the next Linear Collider. A novel support structure for Gas Electron Multipliers (GEMs), which minimizes the material and improves the flatness of the foils, has been developed and tested with multiple GEM modules in a large TPC prototype at DESY. Reducing dead material at the GEM module boundaries improves the field homogeneity. In addition, it was shown in simulation that a field shaping ring at the border of the module can improve the charge collection in regions with non-homogeneous fields. This shaping wire was integrated into the module design and a successful test beam campaign with three modules has been carried out. First results regarding resolution and field distortions will be discussed.

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T. Behnke, F. Müller, A. Münnich, K. Zenker. 2013-09-05. GEM Module Design for the ILD TPC. https://doi.org/10.1088/1748-0221%2F8%2F10%2Fc10010

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