• G. Hahn, D. H. An, H.J. Yim, Y.S. Kim
  KIRAMS, Seoul

Design of conventional 4-vane/rod type of RFQ (Radio Frequency Quadrupole) for the heavy ion medical facility has been studied. The RFQ is capable of accelerating C⁴⁺ ions from an initial energy of 10 keV/u to 300 keV/u. In this work, all the design parameters have been optimized to achieve stable structure and compactness. The 3D electromagnetic field distribution and RF analysis were obtained by CST Microwave Studio and the field was used in TOUTATIS for beam simulation. This paper shows the determined physical and mechanical design parameters of RFQ.

• D. H. An, J. Kang, Y.S. Kim
  KIRAMS, Seoul

This paper concentrates on the design of the low energy beam transport line between an ECR ion source and the spiral inflector of K120 cyclotron. The K120 superconducting cyclotron is under design at KIRAMS, Korea. The cyclotron has about 3.13 Tesla at the cyclotron center and accelerates the C⁶⁺ ions up to 30 MeV/amu. The magnetic field distributions for all magnetic elements and the electric field distributions for all electrostatic elements have been obtained by OPERA3D, TOSCA. The integration of the equation of motion for beam simulation with the calculated field distributions has been carried out with Mathematica. This paper includes the resultant specifications of all elements and the results of beam simulation of the injection system of K120 superconducting cyclotron.

• H. Yim, D. H. An, G. Hahn, Y.-S. Kim
  KIRAMS, Seoul

A magnet lattice of the carbon-ion synchrotron was studied for cancer therapy, which requires maximum 400 MeV/u carbon beam, at KIRAMS. In the study, we optimized the magnet lattice configuration to fit into the therapy purpose. Major requirements for the purpose are (1) long extraction time (about 1 second), (2) compact size, and (3) low cost. For the requirement (1), a slow extraction scheme was adopted by the use of third integer resonance. For (2) and (3), we minimized the circumference as 69.6m and a number of the magnet elements as 16 and 20 for bending magnet and quadrupole magnet, respectively. The study was carried out by the use of a simulation codes for beam particle dynamics and optics. A detail of the conceptual lattice design of the carbon-ion synchrotron is described in the paper.