The sPHENIX experiment is a new generation of large acceptance detectors at the relativistic heavy ion collider at Brookhaven National Laboratory, with scientific goals focusing on probing the strongly interacting Quark–Gluon plasma with hard probes of jets, open heavy flavor particles, and \(\Upsilon\) production. The EMCal detector, which covers the pseudo-rapidity region of \(|\eta | \le 1.1\) , is an essential subsystem of sPHENIX. In this study, we focused on producing and testing EMCal blocks covering a pseudo-rapidity of \(|\eta | \in [0.8, 1.1]\) . These, in conjunction with the central pseudo-rapidity EMCal blocks, significantly enhance the sPHENIX physics capability of the jet and \(\Upsilon\) particle measurements. In this paper, the detector module production and testing of sPHENIX W-powder/scintillating fiber (W/ScFi) electromagnetic calorimeter blocks are presented. The selection of the tungsten powder, mold fabrication, QA procedures, and cosmic ray test results are discussed.
