Design and Beam Test Results for the 2-D Projective sPHENIX Electromagnetic Calorimeter Prototype - INSPIRE

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Design and Beam Test Results for the 2-D Projective sPHENIX Electromagnetic Calorimeter Prototype

Mar 28, 2020

9 pages

Published in:

IEEE Trans.Nucl.Sci. 68 (2021) 2, 173-181

Published: Jan 13, 2021

e-Print:

2003.13685 [physics.ins-det]

DOI:

10.1109/TNS.2020.3034643

Experiments:

BNL-RHIC-SPHENIX

View in:

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Abstract: (IEEE)

sPHENIX is a new experiment under construction for the Relativistic Heavy Ion Collider at Brookhaven National Laboratory which will study the quark-gluon plasma to further the understanding of quantum chromodynamics (QCP) matter and interactions. A prototype of the sPHENIX electromagnetic calorimeter (EMCal) was tested at the Fermilab Test Beam Facility in Spring 2018 as experiment T-1044. The EMCal prototype corresponds to a solid angle of

\Delta \eta \times \Delta \phi = 0.2 \times 0.2

centered at pseudo-rapidity

\eta = 1

. The prototype consists of scintillating fibers embedded in a mix of tungsten powder and epoxy. The fibers project back approximately to the center of the sPHENIX detector, giving 2-D projectivity. The energy response of the EMCal prototype was studied as a function of position and input energy. The energy resolution of the EMCal prototype was obtained after applying a position-dependent energy correction and a beam profile correction. Two separate position-dependent corrections were considered. The EMCal energy resolution was found to be

\sigma (E)/\langle E\rangle = 3.5(0.1) \oplus 13.3(0.2)/\sqrt {E}

based on the hodoscope position-dependent correction, and

\sigma (E)/\langle E\rangle = 3.0(0.1) \oplus 15.4(0.3)/\sqrt {E}

based on the cluster position-dependent correction. These energy resolution results meet the requirements of the sPHENIX physics program.

Note:

9 pages, 9 figures, 3 tables. Published in IEEE Transactions on Nuclear Science (vol. 68, no. 2, pp. 173-181, Feb. 2021). Revisions over previous version in response to referee and editor comments

Prototypes
Poles and towers
Electromagnetics
Two dimensional displays
Powders
Energy resolution
Tungsten
Calorimeters
electromagnetic calorimetry
performance evaluation

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