Electron Beam Extraction from INS AG Synchrotron. Part I. Theory

The theoretical basis for the electron beam extraction from the INS 0.75 GeV AG synchrotron is given. The method is essentially a Piccioni scheme in which the beryllium absorber target and two cascade kicker magnets are used. The extraction efficiency is calculated from the properties of the accelerated beam of the accelerator, the energy and angular distribution of the particles after passing through the absorber and the characteristics of betatron oscillations of the electrons in the guide field containing two pulse magnetic fields and the fringing field of the synchrotron magnet. The efficiency is found to be about 40% at most.