Speaker
Description
The multi-ion radiotherapy with dose distribution and Liner Energy Transfer optimization is being studied at QST. Helium, carbon, oxygen and neon ions are considered as ion species for multi-ion therapy. Requirement values of beam current were 940 µA correspond to He$^2$+, 290 µA to C$^4$+, 330 µA to O$^6$+, and 245 µA to Ne7+, respectively. We performed some beam tests for design of a new compact ion source with the existing 18 GHz NIRS-HEC. From the results of the beam tests, we estimate the mirror magnetic field of NIRS-HEC. Then, the structure of the permanent magnets for new ECR ion source is determined so that they reproduce the values of the upstream mirror peak (Binj), B minimum (Bmin) and the downstream mirror peak (Bext) at the NIRS-HEC. The magnetic field of Binj, Bmin and Bext at NIRS-HEC were 1.14 T, 0.475 T and 0.9 T, respectively. We will describe about the beam tests with the NIRS-HEC and design of the new compact ECR ion source.
| E-mail for contact person | muramatsu.masayuki@qst.go.jp |
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