Feasibility study of TPC at electron positron colliders at Z pole operation

Feasibility study of TPC at electron positron colliders at Z pole operation
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正负电子对撞机 Z 极运行 TPC 的可行性研究

DOI:
10.1088/1748-0221/12/07/p07005
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发表时间:
2017-04
影响因子:
1.3
通讯作者:
Gao Y.
Gao Y.
中科院分区:
工程技术4区
文献类型:
--
作者:
Zhao M.;Ruan M.;Qi H.;Gao Y.

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TPC技术是未来正负电子对撞机的重要技术之一。但在高事件率和高命中率的情况下,其应用受到限制。本文利用全模拟Z→ qq介子样品,通过计算不同TPC参数下的局域电荷密度和体素占有率,研究了在Z极环形正负电子对撞机(CEPC)上使用TPC的可行性。我们的研究表明,TPC可以应用于CEPC Z极操作,如果回流离子被控制到千分之一的水平。我们还发现,失真是相当大的FCC-ee的Z极操作。并提出了几种减小失真的方法。
TPC is a promising technology for the future electron positron colliders. However, its application might be limited at high event rate and high hit occupancies. In this paper, we study the feasibility of using TPC at the circular electron positron collider (CEPC) at Z pole using full simulated Z→ qq̄ samples, by evaluating the local charge density and voxel occupancy at different TPC parameters. Our study shows that the TPC could be applied to the CEPC Z pole operation if back flow ion is controlled to per mille level. We also find that the distortion is considerable for the FCC-ee Z pole operation. And a few approaches are proposed to reduce the distortion.
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