2013年11月
Blocking positive ion backflow using a GEM gate: experiment and simulations
JOURNAL OF INSTRUMENTATION
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- 巻
- 8
- 号
- 記述言語
- 掲載種別
- 研究論文(学術雑誌)
- DOI
- 10.1088/1748-0221/8/11/C11023
- 出版者・発行元
- IOP PUBLISHING LTD
Positive ion feedback can be problematic in a high precision Time Projection Chamber (TPC) as proposed for the International Linear Collider (ILC). Use of a traditional wire gating device would increase the dead areas in the planned module structure. F. Sauli proposed, in 2006, the use of a Gas Electron Multiplier (GEM) as a gating device. We have measured the electron transparency for a 14 mu m thick GEM in a 1 T magnetic field. The transparency does not meet the requirement for a TPC at the ILC. We performed a simulation study using Garfield++ to understand the important parameters. Simulations show that a new GEM structure with wider aperture, for example a hexagonal honeycomb structure, can improve the performance as a gate. Results of measurements will be compared to the simulation and the predicted performance of the new GEM structure will be described.
- ID情報
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- DOI : 10.1088/1748-0221/8/11/C11023
- ISSN : 1748-0221