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arXiv 2501.09587physics.ins-dethep-ex
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采用VMM3a读出的用于径迹探测的超低物质量基于GEM的TPC

The Ultra-Low material budget GEM based TPC for tracking with VMM3a readout

F. Garcia, K. J. Flöthner, A. Amato, S. Biswas, F. M. Brunbauer, M. W. Heiss, G. Janka, D. Janssens, M. Lisowska, M. Meurer, H. Muller, B. Banto Oberhauser, E. … 展开作者

F. Garcia, K. J. Flöthner, A. Amato, S. Biswas, F. M. Brunbauer, M. W. Heiss, G. Janka, D. Janssens, M. Lisowska, M. Meurer, H. Muller, B. Banto Oberhauser, E. Oliveri, G. Orlandini, D. Pfeiffer, T. Prokscha, L. Ropelewski, L. Scharenberg, J. Samarati, F. Sauli, M. van Stenis, R. Veenhof, B. Zeh, X. Zhao

AI总结:

本研究完成了TWIN构型超低物质量GEM-TPC的固化,采用VMM3a/SRS读出,在CERN SPS的H4束线用多种气体混合物测试其径迹性能,为PSI MIXE实验的低动量μ子探测提供支撑。

摘要:

用于粒子径迹探测的TWIN构型气体电子倍增器时间投影室(GEM-TPC,Gaseous Electron Multiplier-Time Projection Chamber),经在不同装置上开展大量研究以验证其径迹探测性能后,已完成固化升级。该探测器最具吸引力的特性是其超低物质量,仅为0.28% X/X₀,且可通过减小入射粒子穿过的气体厚度进一步降低,因此能实现优异的位置重建效果并减少多重散射。该探测器由两个漂移场方向相反的GEM-TPC组成,通过将其中一个在中间平面内相对另一个旋转180度实现,二者共享同一气室即单个容器内的气体体积,该构型被称为TWIN构型。本工作呈现的结果采用新集成的VMM3a/SRS(SRS为前端读出系统)读出电子学测量得到,这是提升探测器整体性能与功能的重要里程碑。2024年,该探测器在欧洲核子研究中心(CERN)超级质子同步加速器(SPS)的H4束线开展测试,实验粒子选用μ子和π介子,测试了多种气体混合物,例如Ar/CO₂(70/30%)、He/CO₂(70/30%)和He/CO₂(90/10%)。其中氦基混合气体用于探测器调试,以满足PSI μ子诱导X射线发射(MIXE,muon-induced X-ray emission)实验所需的低动量μ子径迹探测需求。本文将呈现这些测量获得的结果、简要讨论数据分析所用方法,并对比不同气体混合物下的空间分辨率。

英文摘要:

The Gaseous Electron Multiplier-based Time Projection Chamber (GEM-TPC) in TWIN configuration for particle tracking has been consolidated after extensive investigations in different facilities to study its tracking performance. The most attractive feature of this detector is its ultra-low material budget, which is 0.28\% X/X$_0$ and can be further reduced by decreasing the thickness of the gas traversed by the incident particles. Thus, it provides excellent position reconstruction and reduced multi-scattering. This detector consists of two GEM-TPCs with drift fields in opposite directions, achieved by rotating one 180 degrees in the middle plane with respect to the other. These two GEM-TPCs share the same gas volume, i.e., inside a single vessel. This configuration is called a TWIN configuration. The results presented in this work were measured using the newly integrated VMM3a/SRS readout electronics, an important milestone in improving overall performance and capabilities. In 2024, this detector was tested at the H4 beamline of the SPS at CERN, using muons and pions and with different gas mixtures like, for instance: Ar/CO$_2$ (70/30 \%), He/CO$_2$ (70/30 \%) and He/CO$_2$ (90/10 \%). The helium-based mixtures were used to commission the detector to track low momenta muons required in the PSI muon-induced X-ray emission (MIXE) experiment. The results obtained from these measurements, a brief discussion of the methodology used for the data analysis, and a comparison of the spatial resolution for different gas mixtures will be presented.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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