Abstract
The super Pioneering High Energy Nuclear Interaction eXperiment (sPHENIX) at the Relativistic Heavy Ion Collider will perform high-precision measurements of jets and heavy flavor observables for a wide selection of nuclear collision systems, elucidating the microscopic nature of strongly interacting matter ranging from nucleons to the strongly coupled quark-gluon plasma. A prototype of the sPHENIX calorimeter system was tested at the Fermilab Test Beam Facility as experiment T-1044 in the spring of 2016. The electromagnetic calorimeter (EMCal) prototype is composed of scintillating fibers embedded in a mixture of tungsten powder and epoxy. The hadronic calorimeter (HCal) prototype is composed of tilted steel plates alternating with the plastic scintillator. Results of the test beam reveal the energy resolution for electrons in the EMCal is 2.8%oplus 15.5%sqrt E and the energy resolution for hadrons in the combined EMCal plus HCal system is 13.5%oplus 64.9%sqrt E. These results demonstrate that the performance of the proposed calorimeter system satisfies the sPHENIX specifications.
Original language | English |
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Article number | 8519782 |
Pages (from-to) | 2901-2919 |
Number of pages | 19 |
Journal | IEEE Transactions on Nuclear Science |
Volume | 65 |
Issue number | 12 |
DOIs | |
State | Published - Dec 2018 |
Externally published | Yes |
Funding
This work was supported in part by the Office of Nuclear Physics in the Office of Science of the Department of Energy and in part by the National Science Foundation. ACKNOWLEDGMENT This document was prepared by members of the sPHENIX Collaboration using the resources of the Fermi National Accelerator Laboratory (Fermilab), a U.S. Department of Energy, Office of Science, HEP User Facility. Fermilab is managed by Fermi Research Alliance, LLC (FRA), acting under Contract No. DE-AC02-07CH11359. The authors would like to thank Dr. O. Tsai at UCLA for sharing his experience in developing W/SciFi calorimeter modules and for providing the hodoscope that was used in the test beam, also thank the technical staffs of the University of Illinois at Urbana–Champaign (UIUC) and the Brookhaven National Laboratory for assistance in constructing the prototype detectors, and also thank the University of Colorado Boulder for the technical assistance of putting together the test stand and characterizing the tiles. This work was carried out in part in the Frederick Seitz Materials Research Laboratory Central Research Facilities, UIUC. Manuscript received June 28, 2018; revised August 23, 2018; accepted September 7, 2018. Date of publication November 1, 2018; date of current version December 14, 2018. This work was supported in part by the Office of Nuclear Physics in the Office of Science of the Department of Energy and in part by the National Science Foundation.
Keywords
- Calorimeters
- Relativistic Heavy Ion Collider (RHIC)
- Spaghetti Calorimeter (SPACAL)
- electromagnetic calorimetry
- hadronic calorimetry
- performance evaluation
- prototypes
- silicon photomultiplier (SiPM)
- simulation
- super Pioneering High Energy Nuclear Interaction eXperiment (sPHENIX)