1 OperationHI-13 tandem accelerator is performing well in 2001. The operating terminal voltage of the machine is more than 11.5 MV. The machine has provided 4 260 h beam time for more than 40 experiments in the past year while the operation time is 4 890 h. The distribution of beam time versus month is shown in Fig.1. Nineteen ion species have been accelerated to the target for the 1 OperatingHI-13 tandem accelerator is performing well in 2001. The operating terminal voltage of the machine is more than 11.5 MV. The machine has provided 4 260 h beam time for more than 40 experiments in the past year while the operation time is 4 890 h. The distribution of beam time versus month is shown in Fig. 1. Nineteen ion species have been accelerated to the target for the