Present status of HIMAC at NIRS

Abstract

Since 1994 clinical trials have been performed successfully with carbon beam. To improve the clinical result further, new irradiation systems are under development such as a 3D-irradiation system and a verification system of range with positron emitter. There are also improvements on the accelerator performances. One is the wide range of ion species; the others are concerned with the machine devices and new beam monitors to get good machine operation. In this report we present current status of HIMAC.

Medical Applications of Accelerators

“…Applying a thin (1 mm), pure particle beam provides more accurate range measurements. As compared to in-line PET which uses the broadened peak of the built-up secondaries, the signal intensity (approximately 7 × 10 6 pps) with a radioactive ion beam can be about an order of magnitude higher [37]. However, the yield of secondary positron-emitting ions is at best 1% of the primary beam intensity.…”