Up-grading of Accelerating Tube on HI-13 Tandem Accelerator

The accelerating tube upgrading on HI13 tandem accelerator at CIAE has been completed. The old 182.9 cm accelerating tubes which have been operated for more than 15 years were replaced by one 243.8 cm tube and seven 223.5 cm tubes. To accommodate the new tubes, the configuration of all elements along the beam axis inside tank was rearranged. The modifications on dead section structure, charging system and resistor dividing system has been made. The idlers for the laddertron charging system were redesigned and manufactured. A new structure of the gridded lens at the entrance of tube No.l and associated power supply and control system was adopted. The terminal voltage of the tandem accelerator is now promoted to 15.07 MV.