Z=1-6范围内相对论离子多间隙定时RPC的性能
Performances of multi-gap timing RPCs for relativistic ions in the range Z=1-6
摘要：
本文研究了完全剥离的相对论离子（γ * β =2.7，Z=1-6）辐照下多能隙定时光子晶体的性能。仅使用新的HADES ToF壁的标准“现成”4间隙定时RPC，就可以获得高效率的80 ps时间分辨率。对于约1 kHz/cm 2质子通量和约100 Hz/cm 2碳通量，分辨率恶化至100 ps。这些腔室在E=100 kV/cm的标准场下运行，并在实验期间显示出高稳定性，这支持了RPC在需要容纳非常广泛的电离粒子时是一种方便的选择的事实。这些数据提供了非常高度电离粒子（高达x 36 mip）区域的洞察力，并可用于限制现有的雪崩和空间电荷模型远离通常的“mip谷”。这些结果的影响，一般情况下的检测的基础上的二次过程（n，伽马）导致高度电离粒子的特征能量分布将被讨论，连同时间-电荷相关曲线的性质。
英文摘要：
We present the performance of Multi-gap timing RPCs under irradiation by fully stripped relativistic ions (gamma*beta=2.7, Z=1-6). A time resolution of 80 ps at high efficiency has been obtained by just using standard `off the shelf' 4-gap timing RPCs from the new HADES ToF wall. The resolution worsened to 100 ps for ~ 1 kHz/cm2 proton flux and for ~ 100 Hz/cm2 Carbon flux. The chambers were operated at a standard field of E=100 kV/cm and showed a high stability during the experiment, supporting the fact that RPCs are a convenient choice when accommodating a very broad range of ionizing particles is needed. The data provides insight in the region of very highly ionizing particles (up to x 36 mips) and can be used to constrain the existing avalanche and Space-Charge models far from the usual `mip valley'. The implications of these results for the general case of detection based on secondary processes (n, gamma) resulting in highly ionizing particles with characteristic energy distributions will be discussed, together with the nature of the time-charge correlation curve.
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