CERN Accelerating science

Preprint
Report number	arXiv:1402.2172
Title	Development of CMOS pixel sensors for tracking and vertexing in high energy physics experiments
Author(s)	Senyukov, Serhiy (Strasbourg, IPHC) ; Baudot, Jerome (Strasbourg, IPHC) ; Besson, Auguste (Strasbourg, IPHC) ; Claus, Giles (Strasbourg, IPHC) ; Cousin, Loic (Strasbourg, IPHC) ; Dulinski, Wojciech (Strasbourg, IPHC) ; Goffe, Mathieu (Strasbourg, IPHC) ; Hippolyte, Boris (Strasbourg, IPHC) ; Maria, Robert (Strasbourg, IPHC) ; Molnar, Levente (Strasbourg, IPHC) ; Sanchez Castro, Xitzel (Strasbourg, IPHC) ; Winter, Marc (Strasbourg, IPHC)
Publication	2014
Imprint	10 Feb 2014
Number of pages	11
Subject category	Detectors and Experimental Techniques
Accelerator/Facility, Experiment	CERN LHC ; ALICE
Abstract	CMOS pixel sensors (CPS) represent a novel technological approach to building charged particle detectors. CMOS processes allow to integrate a sensing volume and readout electronics in a single silicon die allowing to build sensors with a small pixel pitch ($\sim 20 \mu m$) and low material budget ($\sim 0.2-0.3\% X_0$) per layer. These characteristics make CPS an attractive option for vertexing and tracking systems of high energy physics experiments. Moreover, thanks to the mass production industrial CMOS processes used for the manufacturing of CPS the fabrication construction cost can be significantly reduced in comparison to more standard semiconductor technologies. However, the attainable performance level of the CPS in terms of radiation hardness and readout speed is mostly determined by the fabrication parameters of the CMOS processes available on the market rather than by the CPS intrinsic potential. The permanent evolution of commercial CMOS processes towards smaller feature sizes and high resistivity epitaxial layers leads to the better radiation hardness and allows the implementation of accelerated readout circuits. The TowerJazz $0.18 \mu m$ CMOS process being one of the most relevant examples recently became of interest for several future detector projects. The most imminent of these project is an upgrade of the Inner Tracking System (ITS) of the ALICE detector at LHC. It will be followed by the Micro-Vertex Detector (MVD) of the CBM experiment at FAIR. Other experiments like ILD consider CPS as one of the viable options for flavour tagging and tracking sub-systems.
Other source	Inspire
Copyright/License	arXiv nonexclusive-distrib. 1.0