Fast alignment of a complex tracking detector using advanced track models
Fast alignment of a complex tracking detector using advanced track models
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使用先进的轨道模型快速对准复杂的跟踪探测器
DOI：
10.1016/j.cpc.2011.03.017
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发表时间：
2011
期刊：
影响因子：
--
通讯作者：
F. Meier
中科院分区：
文献类型：
--
作者：
V. Blobel;C. Kleinwort;F. Meier
欧洲核子研究中心ʼS大型强子对撞机上的紧凑型Muon螺线管实验的内置硅探测器由16个 588模块组成。探测器中的带电粒子轨迹被用来提高模块位置和方向的已知精度。本文主要介绍CMS使用的两种比对算法之一--Millepede-II算法。最近，一种先进的径迹模型被引入到CMS对准过程中，该模型基于“折线”模型，能够适当地考虑探测器材料中的多次库仑散射。我们展示了在合理的时间内解决对准问题所需的独特方法。重点介绍了该问题的数学处理方法。
The inner silicon detector of the Compact Muon Solenoid experiment (CMS) at CERNʼs LHC consists of 16 588 modules. Charged-particle tracks in the detector are used to improve the accuracy to which the position and orientation of the modules are known. This contribution focuses on the Millepede-II algorithm, one of the two alignment algorithms used by CMS. Recently an advanced track model has been introduced into the CMS alignment procedure, which is based on the “Broken Lines” model and is able to take multiple Coulomb scattering in the detector material properly into account. We show the unique approach needed for solving the alignment problem in a reasonable amount of time. Emphasis is given to the mathematical treatment of the problem.