Speaker
Description
High-energy carbon-ion radiotherapy is being carried
out at Heavy Ion Medical Accelerator in Chiba
(HIMAC). Over 12000 cancer patients have been
treated with carbon beams having energies of
between 56-430 MeV/u since 1994. There are two
injectors in the HIMAC for medical and experimental
use. First injector consists of two ECR ion sources and
one PIG ion source, the RFQ linac and the DTL.
Usually, this injector suppling the carbon ion for
cancer therapy and various ion such as H, He, Fe, Xe
are accelerated for biological and physical
experiment. The 10 GHz NIRS-ECR ion source
produce the carbon ion for cancer therapy. The 18
GHz NIRS-HEC ion source produce He to Xe ions for
experimental use. Second injector consists of the
compact ECR ion source with all permanent magnet,
the RFQ linac and the APF IH-DTL. This injector
supplies the carbon ion for experimental use.
Additionally, we tried production of the Indium and
the Tin ions by using the In(C5H5) and the Sn
(i-C3H7)4 at the NIRS-HEC. Beam current of the
115In20+ and 120Sn18+ were 90 and 15 micro A,
respectively. Present status of ECR ion sources and
some development will be described.