Development of a high-rate GEM-based TPC for PANDA
Development of a high-rate GEM-based TPC for PANDA
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DOI：
10.1109/nssmic.2007.4436320
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发表时间：
2007-10
期刊：
影响因子：
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通讯作者：
Q. Weitzel;F. Bohmer;C. Hoppner;T. Huber;B. Ketzer;I. Konorov;A. Mann;S. Neubert;S. Paul;C. Simonetto
中科院分区：
文献类型：
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作者：
Q. Weitzel;F. Bohmer;C. Hoppner;T. Huber;B. Ketzer;I. Konorov;A. Mann;S. Neubert;S. Paul;C. Simonetto
基于GEM的无门控连续读出的TPC被认为是熊猫实验的中心跟踪器。必须在很宽的动量范围内(0.1-8GeV/c)跟踪来自2ldr107p/S的粒子。模拟表明，空间电荷累积高达55fc/cm3，导致可校正的磁道失真高达6 mm。对三重宝石结构的离子回流进行了研究。利用GEM-TPC试验室，在没有磁场的情况下，用Ar/CO2混合气体工作，记录了宇宙µ子的信号，空间分辨率达到了140微米。
An ungated GEM-based TPC with continuous readout is considered as the central tracker of the PANDA experiment. Particles from up to 2ldr107 p macrp annih./s have to be tracked over a wide momentum range (0.1-8 GeV/c). Simulations demonstrate a space charge accumulation of up to 55 fC/cm3, leading to correctable track distortions of up to 6 mm. Ion backflow studies in triple-GEM structures have been performed. A spatial resolution of down to 140 mum has been achieved with a GEM-TPC test chamber, operated with an Ar/CO2 gas mixture and without magnetic field, recording the signals of cosmic muons.