Noise susceptibility analysis of the HF front-end electronics for the CMS high-energy experiment

This paper addresses the study of the immunity to common mode spurious signals and external fields of an electronic system used in high-energy physics detectors. This study uses numerical simulations based on a MTL model applied to shielded cables to analyze common mode and EM radiated interferences in the connection between photodetectors and sensitive amplifiers. This set-up corresponds to the Very Forward Hadron Calorimeter (HF) in CMS and it is composed by about 3000 photo-multipliers and readout amplifiers located about 4 meters from the photodetectors. Shielded cables are used to connect the photomultiplier anode signals to the amplifiers. This study allows predicting grounding and shielding problems and estimating the effect of interference noise at early stages of the design. 11 Refs.