The STAR Forward Silicon Tracker

Journal Article · Mon Jan 06 19:00:00 EST 2025 · Nuclear Instruments and Methods in Physics Research. Section A, Accelerators, Spectrometers, Detectors and Associated Equipment

DOI:https://doi.org/10.1016/j.nima.2025.170202· OSTI ID:3012108

Brandenburg, J. D. ^[1]; Chang, Y. ^[2]; Dong, J. ^[3]; He, Y. ^[3]; Hu, Y. ^[4]; Huang, B. ^[5]; Huang, H. ^[6]; Huang, T. ^[7]; Li, H. ^[2]; Nie, M. ^[3]; Sharma, R. ^[8]; Sun, X. ^[9]; Tribedy, P. ^[8]; Videbæk, F. ^[8]; Visser, G. ^[8]; Wilks, G. ^[5]; Wang, P. ^[6]; Xie, G. ^[10]; Yan, G. ^[3]; Ye, Z. ^[11] ; Yi, L. ^[3]; Yang, Y. ^[12]; Zhang, S. ^[13]; Zhang, Z. ^[5]

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1. Brookhaven National Laboratory (BNL), Upton, NY (United States); Ohio State University, Columbus, OH (United States)
2. National Cheng Kung University, Tainan (Taiwan); Purdue University, West Lafayette, IN (United States)
3. Shandong University (China)
4. Brookhaven National Laboratory (BNL), Upton, NY (United States); Fudan University, Shanghai (China); Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
5. University of Illinois at Chicago, IL (United States)
6. National Cheng Kung University, Tainan (Taiwan)
7. University of Illinois at Chicago, IL (United States); National Cheng Kung University, Tainan (Taiwan)
8. Brookhaven National Laboratory (BNL), Upton, NY (United States)
9. Chinese Academy of Sciences, Gansu (China); University of Illinois at Chicago, IL (United States)
10. University of Illinois at Chicago, IL (United States); University of Chinese Academy of Sciences, Beijing (China)
11. University of Illinois at Chicago, IL (United States); Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
12. Academia Sinica, Taipei (Taiwan); National Cheng Kung University, Tainan (Taiwan)
13. University of Illinois at Chicago, IL (United States); Chongqing University (China)

The Forward Silicon Tracker (FST) is a pivotal component of the forward upgrade of the Solenoidal Tracker at RHIC (STAR), designed to discern hadron charge signs with a momentum resolution better than 30% for 0.2 < p_T < 2GeV/c in the 2.5 < η < 4 pseudorapidity range. Its compact design features three disks along the beam direction, minimized material budget, and scattering effects. The FST uses Hamamatsu’s p-in-n silicon strip sensors with a double metal layer that enables efficient signal routing to the readout electronics, enhancing overall detector performance. The flexible hybrid boards, essential for the readout system, are constructed with Kapton and copper layers to optimize signal handling and power distribution. These boards connect silicon strips to analogue pipeline ASIC APV25-S1 chips, which read up to 128 channels each. A cooling system with nonconducting, volatile NOVEC 7200 coolant at 22.2 °C mitigates ASIC-generated heat. Furthermore, the FST enhances forward tracking performance at STAR as an integral part of the forward upgrade.

• Research Organization: Yale University, New Haven, CT (United States); Brookhaven National Laboratory (BNL), Upton, NY (United States). Relativistic Heavy Ion Collider (RHIC)
• Sponsoring Organization: USDOE; National Natural Science Foundation of China (NSFC)
• Contributing Organization: STAR Collaboration
• Grant/Contract Number: SC0004168; FG02-94ER40865; SC0012704; SC0024189
• OSTI ID: 3012108
• Alternate ID(s): OSTI ID: 2499842; OSTI ID: 2507439; OSTI ID: 2573778
• Journal Information: Nuclear Instruments and Methods in Physics Research. Section A, Accelerators, Spectrometers, Detectors and Associated Equipment, Journal Name: Nuclear Instruments and Methods in Physics Research. Section A, Accelerators, Spectrometers, Detectors and Associated Equipment Vol. 1072; ISSN 0168-9002
• Publisher: Elsevier
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
Forward tracking in colliders
Silicon strip detector