标题： 多条带电阻板室在时间应用中的信号耦合和信号完整性 显示英文标题

标题： Signal coupling and signal integrity in multi-strip Resistive Plate Chambers used for timing applications

摘要： 我们系统地研究了在频率范围$f=0.1-3.5$GHz 内沿多个2条电阻板室（RPC）的电信号传输。 如此选择该范围是为了完全覆盖与用于亚100ps时间应用的RPC中信号的非常短的上升时间相关的带宽。 这项工作提供了实验证据，表明在1米尺度构建的计数器中，模态色散起主导作用，这一事实导致了较大的串扰水平和强烈的信号整形。 结果显示，模态色散出现在RPC中，这是由于容性耦合和感性耦合之间的固有不平衡$C_m/C_o \neq L_m/L_o$。 已经引入了一种实用的方法来恢复这种对称性（以下简称“静电补偿”），使得串扰抑制因子约为$\times 12$，并且上升时间减少200ps。 在补偿条件下，信号传输仅受介质损耗限制，对于典型的浮法玻璃基RPC，每2米的截止频率约为1GHz（$\tan \delta|_{glass} = 0.025\pm0.005$）。 进一步表明，只要耦合的性质是“短程的”，即对于典型的条带线RPC来说是一个几乎精确的假设，“静电补偿”可以应用于任意数量的条带。 观察到了偏离主要TEM传播模式的证据，尽管它们似乎对实际信号可观测量影响很小。 这项工作将先前研究的带宽扩展了近$\times 20$倍。 显示英文摘要

摘要： We have systematically studied the transmission of electrical signals along several 2-strip Resistive Plate Chambers (RPCs) in the frequency range $f=0.1-3.5$GHz. Such a range was chosen to fully cover the bandwidth associated to the very short rise-times of signals originated in RPCs used for sub-100ps timing applications. This work conveys experimental evidence of the dominant role of modal dispersion in counters built at the 1 meter scale, a fact that results in large cross-talk levels and strong signal shaping. It is shown that modal dispersion appears in RPCs due to the intrinsic unbalance between the capacitive and the inductive coupling $C_m/C_o \neq L_m/L_o$. A practical way to restore this symmetry has been introduced (hereafter `electrostatic compensation'), allowing for a cross-talk suppression factor of around $\times 12$ and a rise-time reduction by 200ps. Under conditions of compensation the signal transmission is only limited by dielectric losses, yielding a length-dependent cutoff frequency of around 1GHz per 2 meter for typical float glass -based RPCs ($\tan \delta|_{glass} = 0.025\pm0.005$). It is further shown that `electrostatic compensation' can be achieved for an arbitrary number of strips as long as the nature of the coupling is `short-range', that is an almost exact assumption for typical strip-line RPCs. Evidence for deviations from the dominant TEM propagation mode has been observed, although they seem to have negligible influence in practical signal observables. This work extends the bandwidth of previous studies by a factor of almost $\times 20$.