Relativistic Heavy Ion Physics

这个项目的目标是研究相对论原子核之间的碰撞，并最终确定在广泛的温度和密度范围内核物质的性质。在不可能直接研究大量核物质(如中子星、超新星或大爆炸)的情况下，人们只能求助于由核-核碰撞提供的对有限和瞬变系统的挑战性研究。这项工作将集中在参与RHIC(相对论重离子对撞机)STAR(相对论重离子对撞机)实验的建造工作和对其产生的数据进行分析。恒星合作是为了寻找夸克胶子等离子体(QGP)的特征，夸克胶子等离子体是大爆炸早期的一种物质相。UCD已经提出了跟踪室，将恒星的覆盖范围扩展到靠近光束轴的前沿区域(高$\eTA$)，具有动量分辨率和电荷确定功能。这两个小型前向跟踪室(FTPC)将安装在中央跟踪室(TPC)内，目前正在MPI(慕尼黑)建造。STAR的FTPC将在2000年进行第二次运行。UCD将使用恒星中心的TPC和FTPC继续研究横向、椭圆形、径向和纵向流动。这些对核物质流体动力学行为的研究使人们能够研究其可压缩性，从而研究核物态方程。

9971845CebraThe goal of this project is the study of collisions between relativistic nuclei and ultimately the determination of the properties of nuclear matter over a wide range of temperatures and densities. Without the possibility of direct studies of nuclear matter in bulk (as in neutron stars, supernovae, or the Big Bang), one resorts to the challenging studies of finite and transient systems as provided by nucleus-nucleus collisions. This effort will be focused on participation in the construction effort for the STAR (Solenoidal Tracker At RHIC) experiment at RHIC (Relativistic Heavy Ion Collider) and analysis of the data which it generates. The STAR Collaboration was formed to search for signatures of the Quark Gluon Plasma (QGP), a phase of matter which dominated the early stages of the Big Bang. UCD has proposed tracking chambers which extend STAR's coverage into the forward regions close to the beam axis (high $\eta$), with momentum resolution and charge determination. Construction of these two small Forward tracking chambers (FTPCs), which will fit inside the central tracking chamber (TPC), is now underway at MPI (Munich). The FTPCs for STAR will be installed for the second running period in year 2000. UCD will use the STAR central TPC and the FTPCs to continue their studies of transverse, elliptic, radial, and longitudinal flow. These studies of the hydrodynamical behavior of nuclear matter allow one to study its compressibility, and hence the nuclear equation of state.