sPHENIX HCal discussion

[eric mannel <mannel AT bnl.gov>]

Folks-

I would like to submit the following abstract for CPAD-2017.  This is a workshop for future detector R&D with a focus this year on silicon devices, including silicon optical sensors. Comments and suggestions are welcome.

A Silicon Photo-Multiplier (SiPM) Based Readout for the sPHENIX Calorimeters

E.J. Mannel

For the sPHENIX Collaboration

sPHENIX is an major upgrade to the the PHENIX experiment designed to explore the properties of the Quark-Gluon Plasma (QGP) using jets as probes in p+p, p+A and A + A collisions at the Relativistic Heavy-Ion Collider (RHIC) at Brookhaven National Laboratory (BNL). The sPHENIX detector is based on the former 1.5T BaBar superconducting solinoid magnet and consists of tracking, electromagnetic and hadronic calorimetery with uniform acceptance over 2pi in azimuth and |eta| < 1.1. Silicon Photo-Multipliers (SiPMs) have been chosen as the optical sensors for the EMCal and HCal calorimeters due to their compact nature and ability to operate in high magnetic fields. The readout system for the sPHENIX EMCal and HCal detectors contain a total of ~112K SiPMs, and will the largest system of SiPMs used in a nuclear physics experiment to date. In this talk we will discuss the challenge of operating this large number of devices and present the performance of prototype electronics based on beam tests performed at the FNAL Test Beam Facility (FTBF). In addition, we will discuss the effects of the radiation environment at RHIC on the SiPMs and how we plan to cope with this in the sPHENIX experiment.

-- 
Eric J. Mannel, Ph.D.
PHENIX Group
Physics Dept.
Brookhaven National Laboratory
631/344-7626 (Office)
914/659-3235 (Cell)