Development of STF cryogenic system in KEK

Under the leadership of KEK (High Energy Accelerator Research Organization), the collaborating design and construction activity has been performed in KEK in order to develop the STF (Superconducting RF Test Facility) cryogenic system, together with some positive Japanese industrial members. As the first activity of the collaboration, the initial plant of STF cryogenic system with cooling capacity of 30 W at 2.0 K has been constructed for the testing of STF Cryomodule, and been ready for its operation in KEK. In this session, the present status and schedule of STF cryogenic system in KEK will be briefly reported.