Title :
Trim coil system for the RIKEN superconducting ring cyclotron
Author :
Kim, J.-W. ; Goto, A. ; Mitsumoto, T. ; Kubo, T. ; Okuno, H. ; Kawaguchi, T. ; Tominaka, T. ; Fujishima, S. ; Ikegamai, K. ; Sakamoto, N. ; Yokouchi, S. ; Morikawa, T. ; Yano, Y.
Author_Institution :
RIKEN, Inst. of Phys. & Chem. Res., Saitama, Japan
Abstract :
A superconducting ring cyclotron proposed as a booster of the existing RIKEN Ring Cyclotron (RRC), is composed of six superconducting sector magnets. In each sector magnet, the pole pieces are placed at 4 K to be used as a support structure of the coil vessel against large electromagnetic forces and also to enhance magnetic flux efficiently. The field trimming system suitable for such a cyclotron is thought to be a combination of superconducting and normal trim coils. Considering their differing properties, optimization of a trimming system has been carried out using numerical methods. The trimming system is required to isochronize the magnetic fields for various ions in a wide range of beam energy. Features of the trim coils and the results of optimization are described
Keywords :
accelerator magnets; booster injectors; cyclotrons; electromagnets; ion accelerators; superconducting magnets; 4 K; RIKEN superconducting ring cyclotron; electromagnetic forces; field trimming system; magnetic flux; numerical methods; superconducting sector magnets; trim coils; Copper; Cyclotrons; Helium; Joining processes; Shape; Superconducting coils; Superconducting filaments and wires; Superconducting magnets; Thermal stresses; Wounds;
Conference_Titel :
Particle Accelerator Conference, 1997. Proceedings of the 1997
Conference_Location :
Vancouver, BC
Print_ISBN :
0-7803-4376-X
DOI :
10.1109/PAC.1997.753229
