@inproceedings{oai:repo.qst.go.jp:00054841, author = {水島, 康太 and 古川, 卓司 and 白井, 敏之 and 佐藤, 眞二 and 岩田, 佳之 and 片桐, 健 and 竹下, 英里 and 野田, 耕司 and 水島 康太 and 古川 卓司 and 白井 敏之 and 佐藤 眞二 and 岩田 佳之 and 片桐 健 and 竹下 英里 and 野田 耕司}, book = {第8回日本加速器学会年会プロシーディングス}, month = {Aug}, note = {NIRS has carried out three-dimensional scanning irradiation for carbon-ion radiotherapy at the HIMAC new treatment research facility since May 2011. In this irradiation, we have adopted a raster scan method to make the lateral dose distribution. For the reduction of the difference between prescribed and delivered dose distribution, it is preferable that the extracted beam-current from the synchrotron ring is low ripple, and the response to the beam-on/off switching is quick. To meet these requirements, we have developed a new beam-intensity control system with the RFknockout slow extraction and feedback control system. In the system commissioning, we can modulate the beamintensity in the range of thirty times while keeping the beam-current ripple below 20%.}, pages = {700--703}, title = {HIMAC 新ビーム強度制御システムのコミッショニング}, year = {2011} }