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arXiv 1012.0873nucl-ex
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RHIC上的PHENIX反应面探测器

A Reaction Plane Detector for PHENIX at RHIC

E. Richardson, Y. Akiba, N. Anderson, A. A. Bickley, T. Chujo, B. A. Cole, S. Esumi, J. S. Haggerty, J. Hanks, T. K. Hemmick, M. Hutchison, Y. Ikeda, M. Inaba, … 展开作者

E. Richardson, Y. Akiba, N. Anderson, A. A. Bickley, T. Chujo, B. A. Cole, S. Esumi, J. S. Haggerty, J. Hanks, T. K. Hemmick, M. Hutchison, Y. Ikeda, M. Inaba, J. Jia, D. Lynch, Y. Miake, A. C. Mignerey, T. Niida, E. O'Brien, R. Pak, M. Shimomura, P. W. Stankus, T. Todoroki, K. Watanabe, R. Wei, W. Xie, W. A. Zajc, C. Zhang

摘要:

在2007年运行相对论重离子对撞机(RHIC)之前,设计并安装了一个带有嵌入式光纤光导和光电倍增管读出的塑料闪烁体桨探测器,称为反应平面探测器(RXNP)。RXNP的设计经过优化,可精确测量重离子碰撞的反应平面(RP)角,其中,对于中心$\sqrt{s_{NN}}$ = 200 GeV Au+Au碰撞,它实现了$\sim$ 0.75的$2^{nd}$谐波RP分辨率,这是PHENIX先前能力的$\sim$ 2倍。这一改进是通过将RXNP定位在PHENIX实验的中心区域来实现的,由于其伪快度($1.0<|η|<2.8$)和$ϕ$(2 $π$)的覆盖范围很大,因此它暴露在精确RP测量所需的高粒子多重性下。为了增强观察到的信号,一个2 cm的Pb转换器位于标称碰撞区域和闪烁体桨之间,允许在重离子碰撞中产生的中性粒子通过转换电子对信号做出贡献。本文讨论了2007年RHIC运行期间RXNP的设计、运行和性能。

英文摘要:

A plastic scintillator paddle detector with embedded fiber light guides and photomultiplier tube readout, referred to as the Reaction Plane Detector (RXNP), was designed and installed in the PHENIX experiment prior to the 2007 run of the Relativistic Heavy Ion Collider (RHIC). The RXNP's design is optimized to accurately measure the reaction plane (RP) angle of heavy-ion collisions, where, for mid-central $\sqrt{s_{NN}}$ = 200 GeV Au+Au collisions, it achieved a $2^{nd}$ harmonic RP resolution of $\sim$0.75, which is a factor of $\sim$2 greater than PHENIX's previous capabilities. This improvement was accomplished by locating the RXNP in the central region of the PHENIX experiment, where, due to its large coverage in pseudorapidity ($1.0<|η|<2.8$) and $ϕ$ (2$π$), it is exposed to the high particle multiplicities needed for an accurate RP measurement. To enhance the observed signal, a 2-cm Pb converter is located between the nominal collision region and the scintillator paddles, allowing neutral particles produced in the heavy-ion collisions to contribute to the signal through conversion electrons. This paper discusses the design, operation and performance of the RXNP during the 2007 RHIC run.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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