NEGATIVE HYDROGEN ACCELERATION IN THE CYCLONE-30 AT KIRAMS

Cyclone-30 accelerator was installed at the end of 2001. It has operated for production radioisotopes from October 2003 until now. This cyclotron is the first Cyclone-30 with the negative ion source, which can accelerate protons. Beams of H- generated in a multicusp ion source are injected to the inflector at the center of the cyclotron with especial design and accelerated in two 30 Dees powered by the RF system on its fourth harmonic modes. High intensity proton beams are needed for producing radioisotopes. Beams can be extracted by two carbon stripper systems at opposite sides of the cyclotron and transported to 4 target rooms by 4 beam lines. The H acceleration with stripping extraction is to minimize activation of the cyclotron and to allow for higher intensities. At present the extraction efficiency of 18~30MeV proton beams is 25~40% where a multicusp source can produce 5mA of negative H ions. The maximum extracted beam current is up to about 300uA. The production of the I-123 radiopharmaceutical from a new Xe-124 gas target system is employed. In addition, this cyclotron produces F-18, and Tl-201. This paper will describe the cyclotron facility and the status of the machine since its operation.