Dependence of charge-exchange efficiency on cooling water temperature of a beam transport line Kazami Yamamoto, Shuichiro Hatakeyama, Pranab Kumar Saha, Katsuhiro Moriya, Kota Okabe, Masahiro Yoshimoto, Takamitsu Nakanoya, Kosuke Fujirai, Yoshio Yamazaki and Kazuaki Suganuma EPJ Techn Instrum, 8 1 (2021) 9 Published online: 19 July 2021 DOI: 10.1140/epjti/s40485-021-00067-6