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arXiv 1402.0675physics.ins-dethep-ex
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CMS跟踪器的操作和性能

Operation and performance of the CMS tracker

Viktor Veszpremi

摘要:

CMS硅跟踪器由两个利用半导体技术的跟踪设备组成:内部像素和外部条带探测器。它们在LHC中粒子碰撞所呈现的高占用率和高辐射环境中运行。跟踪器探测器占据CMS中心周围的区域,LHC光束在此碰撞,半径在4 cm至110 cm之间,沿光束轴可达280 cm。像素探测器由6600万像素组成,覆盖约1平方米的总面积。它被带跟踪器包围,具有1000万个读出通道,覆盖总面积约200 m2。会议记录描述了在LHC运行的前三年收集的运行经验。结果包括在数据采集过程中遇到的操作挑战,这些挑战影响探测器的有效分数和读出效率。详细给出了在高占用率的跟踪器的性能,如信噪比和命中重建效率的本地可观。辐射效应的研究相对于传感器偏置的演变,在内部像素的读出阈值,和漏电流。

英文摘要:

The CMS silicon tracker consists of two tracking devices utilizing semiconductor technology: the inner pixel and the outer strip detectors. They operate in a high-occupancy and high-radiation environment presented by particle collisions in the LHC. The tracker detectors occupy the region around the center of CMS, where the LHC beams collide, between 4 cm and 110 cm in radius and up to 280 cm along the beam axis. The pixel detector consists of 66 million pixels, covering about 1 m2 total area. It is surrounded by the strip tracker with 10 million read-out channels covering about 200 m2 total area. The proceedings describe the operational experience collected during the first three years of LHC running. Results include operational challenges encountered during data taking that influence the active fraction and read-out efficiency of the detectors. Details are given about the performance of the tracker at high occupancy with respect to local observables such as signal to noise ratio and hit reconstruction efficiency. Studies of radiation effects are presented with respect to the evolution of sensor bias, read-out thresholds in the inner pixels, and leakage current.

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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