1 ms MULTI-BUNCH ELECTRON BEAM ACCELERATION BY A NORMAL CONDUCTING RF GUN AND SUPERCONDUCTING ACCELERATOR ∗

KEK-STF (Superconducting Test Facility) has been con- structed to establish super-conducting accelerator technol- ogy for ILC (International Linear Collider). This facil- ity is also used to demonstrate a high-brightness quasi- monochromatic X-ray generation by inverse laser Comp- ton scattering. For the both purposes, high intensity elec- tron beam in multi-bunch and long macro-pulse formats is important. The beam commissioning has been started since February 2012. 1 ms macro pulse train is successfully gen- erated and 40 MeV acceleration was confirmed. We report the progress of the beam commissioning including the ba- sic beam properties.