Design and Beam Test Results for the 2-D Projective sPHENIX Electromagnetic Calorimeter Prototype
Design and Beam Test Results for the 2-D Projective sPHENIX Electromagnetic Calorimeter Prototype
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DOI：
10.1109/tns.2020.3034643
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发表时间：
2020-03
影响因子：
1.8
通讯作者：
C. Aidala;S. Altaf;R. Belmont;S. Boose;D. Cacace;M. Connors;E. Desmond;J. Frantz;E. Gamez;N. Grau;J. Haggerty;A. Hodges;J. Huang;Ye-seul Kim;M. Lenz;W. Lenz;N. Lewis;E. Mannel;J. Osborn;D. Perepelitsa;M. Phipps;R. Pisani;S. Polizzo;A. Pun;M. Purschke;C. Riedl;T. Rinn;A. C. RomeroHernandez;M. Sarsour;Z. Shi;A. Sickles;C. Smith;S. Stoll;X. Sun;E. Thorsland;F. Vassalli;X. Wang;C. Woody
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作者：
C. Aidala;S. Altaf;R. Belmont;S. Boose;D. Cacace;M. Connors;E. Desmond;J. Frantz;E. Gamez;N. Grau;J. Haggerty;A. Hodges;J. Huang;Ye-seul Kim;M. Lenz;W. Lenz;N. Lewis;E. Mannel;J. Osborn;D. Perepelitsa;M. Phipps;R. Pisani;S. Polizzo;A. Pun;M. Purschke;C. Riedl;T. Rinn;A. C. RomeroHernandez;M. Sarsour;Z. Shi;A. Sickles;C. Smith;S. Stoll;X. Sun;E. Thorsland;F. Vassalli;X. Wang;C. Woody
sPHENIX是布鲁克海文国家实验室的相对论重离子对撞机正在建设的一个新实验，它将研究夸克胶子等离子体，以进一步理解量子色动力学（QCP）物质和相互作用。sPHENIX电磁量能器（EMCal）的原型于2018年春季在费米实验室测试束设施进行了测试，作为实验T-1044。EMCal原型对应于以伪快度$\eta = 1$为中心的立体角$\Delta \eta \times \Delta \phi = 0.2 \times 0.2$。原型由嵌入钨粉和环氧树脂混合物中的碳化纤维组成。光纤大约投射回sPHENIX探测器的中心，提供2-D投影。EMCal原型的能量响应作为位置和输入能量的函数进行了研究。EMCal原型的能量分辨率后，应用位置相关的能量校正和束流轮廓校正。两个独立的位置相关的校正被认为是。EMCal能量分辨率被发现是$\sigma（E）/\langle E\rangle = 3.5（0.1）\oplus 13.3（0.2）/\sqrt {E}$基于hodoscope位置相关校正，和$\sigma（E）/\langle E\rangle = 3.0（0.1）\oplus 15.4（0.3）/\sqrt {E}$基于集群位置相关校正。这些能量分辨率结果满足sPHENIX物理程序的要求。
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.