sPHENIX HCal discussion

["Umaka, Ejiro N [PHYSA]" <eumaka AT iastate.edu>]

Hi All,

 

I received some suggestions from Megan Connors, and I have made some updates to the abstract.

 

More comments and suggestions are welcome.

 

 

 

Title: Calibration of the sPHENIX hadronic calorimeter system

 

The sPHENIX detector at RHIC is designed to perform high precision measurements of jets and heavy flavor observables to elucidate the microscopic nature of strongly interacting matter. In addition to its electromagnetic calorimeter (EMCal), the sPHENIX calorimeter system includes two hadronic calorimeters (HCals) – the inner HCal (iHCal) and outer HCal (oHCal).

The oHCal (iHCal) are composed of alternating layers of scintillating tiles and steel (aluminum) plates. As hadrons traverse the HCals, the plates cause them to shower and deposit energy in the tiles which is then directed to silicon photomultipliers (SiPMs). The signal from the SiPMs is then aggregated into towers. 

 

Jets will typically deposit energy in all calorimeters; however, this energy must be properly calibrated to get the truth energy, i.e., the energy void of detector effects. 

Since the response in the calorimeter varies from tower-to-tower, the calibration must include a tower-by-tower calibration as well as an overall calibration.

 

This poster will present the calibration plans for the HCals which includes a study comparing cosmic ray data collected by the assembled HCal sectors to the energy deposited (edep) by cosmic muons in the GEANT4 simulation of sPHENIX hadronic calorimeter.