The ATLAS Inner Detector commissioning and calibration
The ATLAS Inner Detector commissioning and calibration
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DOI：
10.1140/epjc/s10052-010-1366-7
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发表时间：
2010-08-20
影响因子：
4.4
通讯作者：
Zutshi, V.
中科院分区：
文献类型：
--
作者：
Aad, G.;Abbott, B.;Zutshi, V.
ATLAS内部探测器是一个复合跟踪系统，由硅像素，硅条和吸管在2 T磁场。它的安装于2008年8月完成，探测器参与了单个大型强子对撞机光束和宇宙射线的数据采集。介绍了探测器的初始运行、硬件调试和现场标定。跟踪性能已经测量了760万个宇宙射线事件，使用跟踪触发器收集，并用模块化模式识别和拟合软件重建。固有命中效率和跟踪触发效率接近100%。进行了电子和空穴的洛伦兹角测量、比能量损失校准和跃迁辐射开启测量。不同的对准技术已被用来重建检测器的几何形状。初始对准后，对高动量径迹测得横向碰撞参数分辨率为22.1 ± 0.9 μ m，相对动量分辨率σ（p）/p =（4.83 ± 0.16）× 10（-4）GeV ~（-1）× p（T）。
The ATLAS Inner Detector is a composite tracking system consisting of silicon pixels, silicon strips and straw tubes in a 2 T magnetic field. Its installation was completed in August 2008 and the detector took part in data-taking with single LHC beams and cosmic rays. The initial detector operation, hardware commissioning and insitu calibrations are described. Tracking performance has been measured with 7.6 million cosmic-ray events, collected using a tracking trigger and reconstructed with modular pattern-recognition and fitting software. The intrinsic hit efficiency and tracking trigger efficiencies are close to 100%. Lorentz angle measurements for both electrons and holes, specific energy-loss calibration and transition radiation turn-on measurements have been performed. Different alignment techniques have been used to reconstruct the detector geometry. After the initial alignment, a transverse impact parameter resolution of 22.1 +/- 0.9 mu m and a relative momentum resolution sigma(p)/p = (4.83 +/- 0.16) x 10(-4) GeV-1 x p(T) have been measured for high momentum tracks.