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DOE OSTI · 3012108

The STAR Forward Silicon Tracker

Brandenburg, J. D. [Brookhaven National Laboratory (BNL), Upton, NY (United States); Ohio State University, Columbus, OH (United States)]·Chang, Y. [National Cheng Kung University, Tainan (Taiwan); Purdue University, West Lafayette, IN (United States)]·Dong, J. [Shandong University (China)]·He, Y. [Shandong University (China)] (ORCID:0000000158616498)·Hu, Y. [Brookhaven National Laboratory (BNL), Upton, NY (United States); Fudan University, Shanghai (China); Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)] (ORCID:0000000200788497)·Huang, B. [University of Illinois at Chicago, IL (United States)]·Huang, H. [National Cheng Kung University, Tainan (Taiwan)] (ORCID:0000000304416786)·Huang, T. [University of Illinois at Chicago, IL (United States); National Cheng Kung University, Tainan (Taiwan)]·Li, H. [National Cheng Kung University, Tainan (Taiwan); Purdue University, West Lafayette, IN (United States)]·Nie, M. [Shandong University (China)] (ORCID:0000000319919490)·Sharma, R. [Brookhaven National Laboratory (BNL), Upton, NY (United States)]·Sun, X. [Chinese Academy of Sciences, Gansu (China); University of Illinois at Chicago, IL (United States)] (ORCID:0000000224000684)·Tribedy, P. [Brookhaven National Laboratory (BNL), Upton, NY (United States)]·Videbæk, F. [Brookhaven National Laboratory (BNL), Upton, NY (United States)] (ORCID:0000000167465644)·Visser, G. [Brookhaven National Laboratory (BNL), Upton, NY (United States)] (ORCID:000000032495758X)·Wilks, G. [University of Illinois at Chicago, IL (United States)]·Wang, P. [National Cheng Kung University, Tainan (Taiwan)]·Xie, G. [University of Illinois at Chicago, IL (United States); University of Chinese Academy of Sciences, Beijing (China)] (ORCID:0000000272797229)·Yan, G. [Shandong University (China)] (ORCID:0000000215790135)·Ye, Z. [University of Illinois at Chicago, IL (United States); Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)] (ORCID:0000000160916772)·Yi, L. [Shandong University (China)] (ORCID:0000000275122657)·Yang, Y. [Academia Sinica, Taipei (Taiwan); National Cheng Kung University, Tainan (Taiwan)]·Zhang, S. [University of Illinois at Chicago, IL (United States); Chongqing University (China)] (ORCID:0000000240427063)·Zhang, Z. [University of Illinois at Chicago, IL (United States)] (ORCID:0000000175682753)
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Abstract

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.

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BibTeXRIS

Brandenburg, J. D. [Brookhaven National Laboratory (BNL), Upton, NY (United States); Ohio State University, Columbus, OH (United States)], Chang, Y. [National Cheng Kung University, Tainan (Taiwan); Purdue University, West Lafayette, IN (United States)], Dong, J. [Shandong University (China)], He, Y. [Shandong University (China)] (ORCID:0000000158616498), Hu, Y. [Brookhaven National Laboratory (BNL), Upton, NY (United States); Fudan University, Shanghai (China); Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)] (ORCID:0000000200788497), Huang, B. [University of Illinois at Chicago, IL (United States)], Huang, H. [National Cheng Kung University, Tainan (Taiwan)] (ORCID:0000000304416786), Huang, T. [University of Illinois at Chicago, IL (United States); National Cheng Kung University, Tainan (Taiwan)], Li, H. [National Cheng Kung University, Tainan (Taiwan); Purdue University, West Lafayette, IN (United States)], Nie, M. [Shandong University (China)] (ORCID:0000000319919490), Sharma, R. [Brookhaven National Laboratory (BNL), Upton, NY (United States)], Sun, X. [Chinese Academy of Sciences, Gansu (China); University of Illinois at Chicago, IL (United States)] (ORCID:0000000224000684), Tribedy, P. [Brookhaven National Laboratory (BNL), Upton, NY (United States)], Videbæk, F. [Brookhaven National Laboratory (BNL), Upton, NY (United States)] (ORCID:0000000167465644), Visser, G. [Brookhaven National Laboratory (BNL), Upton, NY (United States)] (ORCID:000000032495758X), Wilks, G. [University of Illinois at Chicago, IL (United States)], Wang, P. [National Cheng Kung University, Tainan (Taiwan)], Xie, G. [University of Illinois at Chicago, IL (United States); University of Chinese Academy of Sciences, Beijing (China)] (ORCID:0000000272797229), Yan, G. [Shandong University (China)] (ORCID:0000000215790135), Ye, Z. [University of Illinois at Chicago, IL (United States); Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)] (ORCID:0000000160916772), Yi, L. [Shandong University (China)] (ORCID:0000000275122657), Yang, Y. [Academia Sinica, Taipei (Taiwan); National Cheng Kung University, Tainan (Taiwan)], Zhang, S. [University of Illinois at Chicago, IL (United States); Chongqing University (China)] (ORCID:0000000240427063), Zhang, Z. [University of Illinois at Chicago, IL (United States)] (ORCID:0000000175682753). 2025-01-07. The STAR Forward Silicon Tracker. https://doi.org/10.1016/j.nima.2025.170202

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