Design of double storage rings at MUSES

Double storage rings (DSR) will play a role to perform various experiments of collision or merging of radioisotope beams with ions, electron beams and X-rays produced from an undulator. The experiments will be performed at two crossing points, One is for collision of relativistic ion beam with electrons with a crossing angle of 20 mrad. Another is for merging of ion beams with an angle of 170 mrad. To perform these experiments with high luminosity, the electron beam has two different operation modes. The emittance of 10/sup -6/ m*rad is prepared for the collison with RI and that of 10/sup -8/ m*rad is done for production of high brilliant X-rays.