Beam extraction from a synchrotron through a magnetic shield

A new beam extraction scheme from a synchrotron is put forward. The main difference from other schemes of extraction is the use of magnetic shields instead of a septum. Magnetic shields are located in the central dipole magnets of a pulsed chicane. The magnetic shield is a multilayer copper–iron tube. Numerical simulations and experimental results for the magnetic shield are presented. A good accordance between them has been shown. The advantages and the area of application of the new extraction scheme are discussed. The proposed scheme will be used for extraction from a booster synchrotron to a storage ring in a new synchrotron radiation source in Novosibirsk.