PULSE STRETCHER OPERATION OF THE ELECTRON STORAGE RING, KSR*

An electron storage ring, KSR has been completed as a pulse stretcher of the output beam from 100 MeV discload type S-band electron linac with maximum duty factor of 2x10 -5 . The beam is injected into the ring by a single turn and slowly extracted with combination of the third order resonance and the RF-knockout method. It is experimentally verified that the beam spill between 0.2 and 40 second is realized with the extraction efficiency more than 50% resulting the duty factor over 90%.