Position Resolution for the CMS Barrel Pixel Detector after Irradiation

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• 作者：E. Alagö ; z ; C. Amsler ; V. Chiochia ; S. Dambach ; C. Eggel ; W. Erdmann ; D. Kotlinski ; U. Langenegger ; B. Meier ; J. Rochet ; T. Rohe ; T. Rommerskirchen ; A. Starodumov ; M. Swartz ; P. Trü ; b
• 刊名：Nuclear Physics B - Proceedings Supplements
• 出版年：2009
• 出版时间：15 December 2009
• 年：2009
• 卷：197
• 期：1
• 页码：180-184
• 全文大小：627 K

文摘

The CMS barrel pixel detector is the innermost tracking device, reconstructing the interaction vertices and charged particle trajectories. At the LHC design luminosity, 10³⁴ cm⁻² s⁻¹, there will be 1000 charged particles per bunch crossing every 25 ns. In the innermost layer the pixel sensors will be exposed to a fluence of 3×10¹⁴n_eq/cm²/yr with consequent degradation of the silicon lattice structure and particle detection performances. Beam tests of irradiated pixel sensors were performed at CERN with the final front end electronics in a 3T magnetic field. We present the measurements of charge collection and radiation hardness, as well as spatial resolution.