RF power test and conditioning of the new accelerating structures for the BEPC II-Linac

The Beijing Electron Positron Collider Upgrade Project ( BEPC II) requires its injector linac to upgrade the beam energy and current. Thus the accelerating structures in the positron production region must be newly designed and constructed to meet the high gradient demand. These new structures must be tested and conditioned with the high RF power before their installation into the linac tunnel. This paper describes the design and construction of the high power RF test stand, the tuning of the RF Power source, the progress and the final results of the RF test and conditioning.