IONS UP TO 0.5 C.

RF SUPERCONDUCTIVITY HAS BEEN VERY SUCCESSFULLY APPLIED TO HEAVY-ION ACCELERATORS. HOWEVER, TO INCREASE THE CAPABILITYOF EXISTING ACCELERATINO FACILITIES TO HIGHER ENERGIES, NEW ACCELERATING STRUCTURES OPTIMIZED FOR FAST IONS WILL HAVE TOCOME INTO EXISTENCE. WE PROPOSE TO DETERMINE A SET OF SUPERCONDUCTING ACCELERATING STRUCTURES WHICH WOULD EFFICIENTLY ACCELERATE HEAVY IONS UP TO A VELOCITY OF 0.5 C CORRESPONDING TO AN ENERGY OF MORE THAN 100 MEV/NUCLEON. GREAT EMPHASIS WILL BE PLACED ON FINDING STRUCTURES WHICH ARE THE MOST EFFICIENT, THAT IS, THE ONES WHICH PROVIDE A HIGH ENERGY GAIN WHILE BEING EASY AND CHEAP TO MANUFACTURE. THESE STRUCTURES WILL BE ELECTROMAGNETICALLY DESIGNED AND A ROOM TEMPERATURE PROTOTYPE OF ONE OF THEM WILL BE BUILT TO DETERMINE ITS ELECTROMAGNETIC PROPERTIES. CONSTRUCTION AND CRYOGENIC TESTING OF THE RESONATORS WILL TAKE PLACE UNDER PHASE II.