@misc{oai:repo.qst.go.jp:00071201, author = {Furukawa, Takuji and Shirai, Toshiyuki and Inaniwa, Taku and Satou, Shinji and Mizushima, Kota and Noda, Kouji and et.al and 古川 卓司 and 白井 敏之 and 稲庭 拓 and 佐藤 眞二 and 水島 康太 and 野田 耕司}, month = {Jul}, note = {At Heavy Ion Medical Accelerator in Chiba (HIMAC), more than 8000 patients have been successfully treated by carbon ion beams since 1994. The successful results of treatments have led us to construct a new treatment facility equipped with three-dimensional pencil beam scanning irradiation system. For implementation of this irradiation technique, we developed fast scanning magnet and their supply, which are required to have field ramp rate of more than 250 T/s. The scanning magnets set at the entrance of the irradiation system are two dipole magnets to scan the beam in both horizontal and vertical directions, and used to form the irradiation field to be tumor shape. Before the installation, performance test including both static and dynamic field measurement was carried out. Severe delay of the field and temperature rise were not observed as expected. Measured field ramp rate reached up to 300 T/s. After the installation, we verified the accuracy and stability of the scanned ion beam through the commissioning with the beam. As a successful result of the commissioning, treatment using new scanning system was started in 2011., International Conference on Magnet Technology (MT-23)}, title = {Development of fast scanning magnets and their power supply for particle therapy}, year = {2013} }