TY - JOUR
T1 - Numerical Evaluation of Screening Current-Induced Magnetic Field in REBCO Coil System for Skeleton Cyclotron Using a Full-Scale Model
AU - Shirai, Kodai
AU - Ishiyama, Atsushi
AU - Ueda, Hiroshi
AU - Noguchi, So
AU - Watanabe, Tomonori
AU - Nagaya, Shigeo
AU - Fukuda, Mitsuhiro
N1 - Publisher Copyright:
© 2002-2011 IEEE.
PY - 2022/9/1
Y1 - 2022/9/1
N2 - We have been developing a new-generation accelerator named high-temperature superconducting skeleton cyclotron (HTS-SC), an extremely compact and high-intensity accelerator capable of producing 211At for targeted alpha-particle therapy, which is expected to be effective in treating advanced cancer. The coil system for HTS-SC consists of multiple air-core REBCO coils that create a magnetic field of high intensity and precision required for particle acceleration. The HTS-SC needs high-precision magnetic field distribution and temporal stability in the particle acceleration plane. However, the magnetic field induced by the screening current in the REBCO tape (SCIF: Screening Current-Induced magnetic Field) deteriorates the quality of the generated magnetic field spatially and changes it temporally. Therefore, in this paper, the SCIF is evaluated based on numerical analysis for a full-scale REBCO coil system designed for targeted alpha-particle therapy. In addition, the effect of the overshoot method, which is one of the current waveform control methods used to reduce the effect of SCIF on temporal stability, is investigated.
AB - We have been developing a new-generation accelerator named high-temperature superconducting skeleton cyclotron (HTS-SC), an extremely compact and high-intensity accelerator capable of producing 211At for targeted alpha-particle therapy, which is expected to be effective in treating advanced cancer. The coil system for HTS-SC consists of multiple air-core REBCO coils that create a magnetic field of high intensity and precision required for particle acceleration. The HTS-SC needs high-precision magnetic field distribution and temporal stability in the particle acceleration plane. However, the magnetic field induced by the screening current in the REBCO tape (SCIF: Screening Current-Induced magnetic Field) deteriorates the quality of the generated magnetic field spatially and changes it temporally. Therefore, in this paper, the SCIF is evaluated based on numerical analysis for a full-scale REBCO coil system designed for targeted alpha-particle therapy. In addition, the effect of the overshoot method, which is one of the current waveform control methods used to reduce the effect of SCIF on temporal stability, is investigated.
KW - Cyclotrons
KW - REBCO coil system
KW - screening current-induced magnet field
KW - targeted alpha-particle therapy
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U2 - 10.1109/TASC.2022.3171195
DO - 10.1109/TASC.2022.3171195
M3 - Article
AN - SCOPUS:85131621134
SN - 1051-8223
VL - 32
JO - IEEE Transactions on Applied Superconductivity
JF - IEEE Transactions on Applied Superconductivity
IS - 6
M1 - 4605005
ER -
