First magnetic test of a superconducting Nb$_{3}$Sn Wiggler magnet for CLIC

To achieve high luminosity at the collision point of the Compact Linear Collider (CLIC) the normalized horizontal and vertical emittances of the electron and positron beams must be reduced to 500 nm and4 nm before the beams enter the 1.5 TeV linear accelerators. An effective way to accomplish ultra-low emittances with only small effects on the electron polarization is using damping rings operating at 2.86GeV equipped with superconducting wiggler magnets. Only superconducting wiggler magnets meet the demanding magnetic specifications of the CLIC damping rings. Although Nb-Ti damping wiggler magnets fulfill the specifications of CLIC, Nb$_{3}$Sn wiggler magnets would reach higher magnetic fields leading to even better beam properties for CLIC. Moreover, they have at the same time higher thermal and magnetic margins. Therefore, Nb$_{3}$Sn wiggler magnets are under investigation at CERN despite the challenging manufacturing process. This paper presents first results of Nb$_{3}$Sn coils and short model tests and outlines the further plans for developing Nb$_{3}$Sn wiggler magnets at CERN.