CF $_4$的大面积THGEM特性及汤森系数的实验测量
Characterisation of Large Area THGEMs and Experimental Measurement of the Townsend Coefficients for CF$_4$
摘要：
虽然小THGEM的性能是众所周知的，但在这里，我们考虑将其扩展到大面积电荷读出的挑战。首先，我们通过报告低压CF $_4$中直径为10 cm的THGEM的实验汤森系数来验证较大THGEM的预期增益。大面积50 cm × 50 cm的THGEM来自商业PCB供应商，观察到几何缺陷，我们使用光学相机设置对其进行量化。大面积THGEMs的实验特点是在博尔比地下实验室通过一系列的增益校准和α谱测量。利用ANSYS、Magboltz和Garfield++等软件对基于大面积THGEM的TPC进行了仿真研究。我们还考虑了它们对定向暗物质研究和核安全中的潜在应用的影响。
英文摘要：
Whilst the performance of small THGEMs is well known, here we consider the challenges in scaling these up to large area charge readouts. We first verify the expected gain of larger THGEMs by reporting experimental Townsend coefficients for a 10 cm diameter THGEM in low-pressure CF$_4$. Large area 50 cm by 50 cm THGEMs were sourced from a commercial PCB supplier and geometrical imperfections were observed which we quantified using an optical camera setup. The large area THGEMs were experimentally characterised at Boulby Underground Laboratory through a series of gain calibrations and alpha spectrum measurements. ANSYS, Magboltz and Garfield++ simulations of the design of a TPC based on the large area THGEMs are presented. We also consider their implications for directional dark matter research and potential applications within nuclear security.
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。
