Some R&D for the update project of Beijing Tandem Laboratory

A update project of the Beijing Tandem Laboratory was proposed in 1999. The main part of this project is the construction of a 100 MeV high intensity H/sup c/yclotron. Some R&D for such a cyclotron have been ongoing for two years, e.g. the axial injection line which is able to inject a 5.2 mA DC beam to the central region of the machine recently. In this paper, the progress of R&D for the ISOL's target-source system will also be reported.