论文标题
非电离电子引起的He/cf $ _4 $气体混合物中发光的第一个证据
First evidence of luminescence in a He/CF$_4$ gas mixture induced by non-ionizing electrons
论文作者
论文摘要
气体电子倍增器（GEM）的光学读数提供了非常有趣的性能，并已针对粒子物理中的不同应用提出。特别是，由于其在KEV Energy系列中的良好效率，它是针对低能和罕见的事件研究（例如暗物质搜索）开发的。到目前为止，光学方法利用了宝石通道中雪崩过程中产生的光。通过合适的电场加速的电子可以诱导气体中的进一步发光。 Cygno合作通过三轮结构的结合使用和在大气压下的HE/CF $ _4 $ _4 $（60/40）气体混合物中的网格进行了研究。本文报道的结果可以得出结论，在大约11〜kV/cm的电场中，发现光子产生的平均自由路径约为1.0 〜cm。
Optical readout of Gas Electron Multipliers (GEM) provides very interesting performances and has been proposed for different applications in particle physics. In particular, thanks to its good efficiency in the keV energy range, it is being developed for low-energy and rare event studies, such as Dark Matter search. So far, the optical approach exploits the light produced during the avalanche processes in GEM channels. Further luminescence in the gas can be induced by electrons accelerated by a suitable electric field. The CYGNO collaboration studied this process with a combined use of a triple-GEM structure and a grid in an He/CF$_4$ (60/40) gas mixture at atmospheric pressure. Results reported in this paper allow to conclude that with an electric field of about 11~kV/cm a photon production mean free path of about 1.0~cm was found.
