Design and Performance of the Readout Electronics for the sPHENIX Calorimeters

The sPHENIX collaboration has proposed a major upgrade, sPHENIX, to probe the nature of the Quark-Gluon Plasma, QGP, by studying jets produced in p+p, p+A, and A+A collisions at RHIC. The sPHENIX detector consists of a superconducting solenoid, formerly the BaBar solenoid, electromagnetic and hadronic calorimetry, and central tracking optimized for jet studies. For sPHENIX electromagnetic and hadronic calorimeters, we have designed an optical readout system based on Silicon Photo-multipliers (SiPMs). We have also designed a new 14-bit ADC based digitizer system capable of operating up to 65 MHz and provides a digital pipeline capable of buffering 8 μs of data and up to 5 triggered events. In this paper we will present the current design, along with the performance of the prototype calorimeter electronics and readout chain.