论文标题
用于颗粒探测器低温运行的钻石样碳涂料
Diamond-like carbon coatings for cryogenic operation of particle detectors
论文作者
论文摘要
提出了在低温温度（低至77 K）处的钻石样碳（DLC）涂层的表征，涵盖了气态和液体颗粒仪器的实际兴趣的电阻率范围：10^-1-10^5 mohm/sq。在线性，表面均匀性和随时间的稳定性方面观察到的良好行为和运输电荷增加了其他知名的特征，例如低化学反应性和对辐射的耐受性。正如基于二维可变范围电子跳跃的电导率机制，观察到的温度依赖性和稳定性与电导率机制一致，这是预期的，对于由无定形碳制成的薄膜的表面电导率所预期。提出了由DLC构建的电阻保护井检测器（“ Rwell”）的最初结果，并呈现靠近氩气液体共存点（1 bar时为87.5 K）。
Characterization of diamond-like carbon (DLC) coatings at cryogenic temperatures (down to 77 K) is presented, covering the electrical resistivity range of practical interest to gaseous and liquid particle instrumentation: 10^-1-10^5 Mohm/sq. The good behaviour observed in terms of linearity, surface uniformity and stability with time and transported charge add to other well-known characteristics like low chemical reactivity and tolerance to radiation. The observed temperature dependence and stability of electrical properties with transported charge is consistent with a conductivity mechanism based on 2-dimensional variable-range electron hopping, as expected for the surface conductivity of thin films made from amorphous carbon. First results from a resistive-protected WELL detector ('RWELL') built with DLC and operated close to the liquid-vapor coexistence point of argon (87.5 K at 1 bar) are presented.
