Commissioning of the offline-teststand for the S-DALINAC polarized injector SPIN

At the superconducting Darmstadt linear accelerator S-DALINAC a new injector for polarized electrons (SPIN) is under development. For this purpose an offline-teststand has been constructed. It consists of the source of polarized electrons and a test beamline including a Wien filter for spin manipulation, a Mott polarimeter for polarization measurement and various beam steering and diagnostic elements. The polarized electron beam is produced by photoemission from a strained GaAs cathode. We report on the status of this project and present first results of the measurements of the beam properties. We also give an outlook on the upcoming installation of SPIN at the S-DALINAC.