Design and development of radio frequency output window for circular electron–positron collider klystron
Lu Zhijun1, 2, 3, †, Fukuda Shigeki1, 4, Zhou Zusheng1, 3, Pei Shilun1, 3, Wang Shengchang1, 3, Xiao Ouzheng1, 3, Zaib UnNisa1, 3, Bai Bowen1, 2, 3, Pei Guoxi1, 3, Dong Dong1, 3, Zhou Ningchuang1, 3, Wang Shaozhe5, Chi Yunlong1, 3
       

(a) Type (i) window and (b) type (ii) window.