Progress Report on Testing of a 100-kV 125-mA Deuteron Injector

The Linear Accelerator to be used for the Fusion Materials Irradiation Test Facility (FMIT) will require an injection energy of 100 keV at a dc current level of 125 mA. Studies are being made on a pre-prototype version of this injector, including performance tests of both a single aperture reflexarc ion source and a cusp-field source. A single stage, high-gradient extraction system is used prior to mass analysis in a 90° bending magnet. A two-stage beam steering device to measure beam emittance under full beam power has been designed and constructed. To avoid production of neutrons, all prototype tests are run with H2+ ions rather than D+ ions.