Enhancement of Ne-like Ar 46.9 nm laser intensity by increasing the inner diameter of the capillary Hui Tong, Yongpeng Zhao, Muhammad Usman Khan, Qi Yu, Dongdi Zhao, Feifei Zhang and Ziyue Cao Eur. Phys. J. D, 73 7 (2019) 132 Published online: 02 July 2019 DOI: 10.1140/epjd/e2019-90523-4