Experiment performance study of a single-stage coaxial pulse tube cryocooler pre-cooled by liquid nitrogen operating at 56 Hz: Achieving 0.5 W@25.5 K cooling capacity. - Liu, Chenglong; Xing, Enchun; Tian, Bo; Yang, Bin; Niu, Yuefeng; Feng, Tianshi; Tang, Qingjun; Ma, Yuexue; Wang, Nailiang; Cai, Jinghui (Cryogenics, 2025)