; Wang Li
; Wu Ping] Univ Sci & Technol Beijing, Beijing 100083, Peoples R China
; [Ji Quan] Chinese Acad Sci, Inst High Energy Phys, Beijing 100049, Peoples R China
; [Li Xun-Feng] Chinese Acad Sci, Inst Engn Thermophys, Beijing 100190, Peoples R China
; [Liu Jian-Ping] Tianjin Univ, Tianjin 300072, Peoples R China
In order to take away much more heat on the BESIII beam pipe to guarantee the normal particle detection, EDM-1 (oil No.1 for electric discharge machining), with good thermal and flow properties was selected as the candidate coolant for the central beryllium pipe of the BESIII beam pipe. Its cooling character was studied and dynamic corrosion experiment was undertaken to examine its corrosion on beryllium. The experiment results show that EDM-1 would corrode the beryllium 19.9 mu m in the depth in 10 years, which is weak and can be neglected. Finite element simulation and experiment research were taken to check the cooling capacity of EDM-1. The results show that EDM-1 can meet the cooling requirement of the central beryllium pipe. Now EDM-1 is being used to cool the central beryllium pipe of the BESIII beam pipe.