Status of the magnet and of the undulator activities for the X ray Free Electron Laser SwissFEL at the Paul Scherrer Institute

An overview of the magnet measurement activities at the Paul Scherrer institute is presented. The talk will mainly focuss on the magnets needed for the X-ray free electron laser (SwissFEL), the next large scale facility in preparation at the Paul Scherrer Institute. Based on a normalconducting 5.8 GeV linear accelerator, the SwissFEL will cover a spectral range of 0.1-10 nm wavelength An amount of typically 300 magnets of 4 different types (solenoids, quadrupoles, dipoles and correctors) is required. In order to preserve the high brightness and the low emittance of the femto-second electron pulses, these magnets have to fulfill severe tolerances in the field quality and in the magnet positioning. An overview of the status of the magnetic elements will be presented. The magnetic measurements strategy, the development of magnetic measurements systems and a summary of the main test results will be reviewed.