sPHENIX EMCal discussion

["Romero Hernandez, Anabel" <acr4 AT illinois.edu>]

Dear all,

Below is an abstract for a talk on the sPHENIX EMCal design and 2018 testbeam results, prepared for the IEEE conference. Any comments are greatly appreciated.

Design and testbeam results for the 2D projective sPHENIX EMCal prototype

sPHENIX is a future experiment at the Relativistic Heavy Ion Collider that aims to study the properties of the quark gluon plasma, a high density, high temperature, strongly interacting state of matter produced in relativistic heavy ion collisions. The sPHENIX detector is designed with a tracking system, a calorimeter system with an electromagnetic calorimeter and a hadronic calorimeter, and a solenoid magnet. The electromagnetic calorimeter (EMCal) is a sampling calorimeter that measures electrons, positrons, and photons, with a coverage of |η| < 1.1 and full azimuth. The EMCal is made of calorimeter modules that consist of scintillating fibers embedded in tungsten powder and epoxy, followed by light guides read out by silicon photomultipliers. One particular feature of the EMCal is its 2D projectivity, meaning that the scintillating fibers point towards the interaction region. A prototype of the EMCal was tested in 2018 at the Fermilab Test Beam Facility. The prototype corresponds to a slice ∆η × ∆φ = 0.2 × 0.2 centered at η=1. The goal of the beam test was to study the prototype’s energy response as a function of input energy and position. This talk presents details on the calorimeter design as well as the results of the 2018 beam test.

Best,

Anabel