arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1003.2492physics.ins-dethep-ex
收藏

完整CMS跟踪器的首次对齐

First Alignment of the Complete CMS Tracker

Frank Meier

摘要:

本会议记录介绍了CMS跟踪器完整校准的第一批结果,该结果基于调试运行期间采集的宇宙数据中数百万条重建轨道,其中探测器处于最终位置,并且存在磁场。CMS Tracker的全硅设计为使用151,148个硅条和1440个硅像素模块对齐复杂系统带来了新的挑战。为了获得最佳的轨道参数分辨率,其模块的位置和方向需要以大约1微米的精度来确定。这些模块被宇宙射线粒子很好地照亮,使用两种基于轨道的对齐算法与调查测量相结合进行对齐。在所有五个轨道参数的分辨率控制与数据驱动验证的轨道参数测量附近的相互作用区域,并测试与预测详细的探测器模拟。第一次质子碰撞的预期跟踪性能的前景。

英文摘要:

This conference proceeding presents the first results of the full CMS Tracker alignment based on several million reconstructed tracks from the cosmic data taken during the commissioning runs with the detector in its final position and magnetic field present. The all-silicon design of the CMS Tracker poses new challenges in aligning a complex system with 15\,148 silicon strip and 1440 silicon pixel modules. For optimal track-parameter resolution, the position and orientation of its modules need to be determined with a precision of about one micrometer. The modules, well illuminated by cosmic ray particles, were aligned using two track-based alignment algorithms in sequence in combination with survey measurements. The resolution in all five track parameters is controlled with data-driven validation of the track parameter measurements near the interaction region, and tested against prediction with detailed detector simulation. An outlook for the expected tracking performance with the first proton collisions is given.

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。

↑