The Injector Systems of the Fair Project

The present GSI accelerator chain will serve as an injector for FAIR (Facility for Antiproton and Ion Research). The linear accelerator UNILAC and the heavy ion synchrotron SIS18 should deliver up to 1⋅10 U-particles/sec. In the past two years different hardware measures and a careful fine tuning of the UNILAC resulted in an 35% increase of the beam intensity to a new record of 1.25⋅10 U-ions per 100 μs or 2.3 10 U-ions per 100 μs. The increased stripper gas density, the optimization of the Alvarez-matching, the use of various newly developed beam diagnostics devices, and a new charge state separator system in the foil stripper section comprised the successful development program. The contribution reports results of beam measurements during the high current operation with uranium beams (beam pulse power up to 0.65 MW). The UNILAC-upgrade for FAIR will be continued by assembling a new front-end for U, stronger power supplies for the Alvarez quadrupoles, and versatile high current beam diagnostics devices. Additionally, the offered primary proton beam intensities will be increased by a new proton linac, which should be commissioned in 2013. We acknowledge the support of the European Community – Research Infrastructure Activity under the FP6 "Structuring the European Research Area" program (CARE, contract number RII3CT-2003-506395). Work supported by the European Community INTAS Project Ref. no. 06-1000012-8782.