GUNMA UNIVERSITY
HEAVY ION MEDICAL CENTER
(Research Institute)
Outline of the system
Outline of the system
| Ion species | Carbon |
|---|---|
| Penetrating range | 25 cm in tissue (400 MeV/u) |
| Field size | 15 cm x 15 cm (maximum) |
| Dose rate | 5 GyE/min (1 x 109 pps) |
| Treatment room | 3 treatment rooms with 4 irradiation (horizontal, horizontal and vertical, vertical) ports |
| Experiment room | 1 room with 1 (vertical) port for the development of an advanced scanning technique for small targets |
Accelerator design
Ion source
| Type | ECR (electron cyclotron resonance) x 1 |
|---|---|
| Magnet | all permanent type |
| Frequency | around 10 GHz (adjustable) |
| q/A | ≥ 1/3 (C4+) |
Linear Accelerator
| Type | RFQ and DTL with an APF (alternating phase focusing) technique |
|---|---|
| Frequency | 200 MHz |
| Energy | 600 keV/u (RFQ)、4.03 MeV/u (DTL) |
Synchrotron
| Lattice | FODO |
|---|---|
| Circumference Injection |
63 m multi turn (effectively 11-14 turns) |
| Extraction | Slow extraction |
| Energy | 140 - 400 MeV/u |
| RF | 0.90 - 6.97 MHz, 2.0 kV max. |
