Pedestal and Noise Study in 2016 Test Beam Experiment of CMS High Granularity Calorimeter
Yu-hsiang Chang1*, Sandhya Jain2, Kai-Yu Cheng1
1physical department, National Central University, Taoyuan city, Taiwan
2physical department, Tata Institute of Fundamental Research, Mumbai, India
* presenting author:Yu-hsiang Chang,
We study the noise of the silicon sensors for the CMS High Granularity Calorimeter (HGC) using the data collected during the test beam runs at CERN in August and September 2016. The noise is studied in different levels: raw data, after pedestal subtraction, and after common mode noise subtraction. The correlation of different readout channels is also studied. Different configuration of detector setups are tested for our hypothesis for the observed phenomenon in test beam data.

Keywords: CMS upgrade, silicon sensor, high granularity calorimeter, pedestal, test beam experiment