@article{oai:repo.qst.go.jp:00043833,
 author = {Furukawa, Takuji and Noda, Kouji and Uesugi, Takehiro and Naruse, Takuya and Shibuya, Shinji and 古川 卓司 and 野田 耕司 and 上杉 健弘},
 journal = {Nuclear Instruments & Methods in Physics Research Section B},
 month = {Nov},
 note = {In cancer therapy using an ion beam, a scanning irradiation method has been developed in order to realize 3-D conformal irradiation. From studies of the scanning method, it has been required for a medical synchrotron to be capable of controlling the beam intensity during the duration of extraction. For this purpose, a beam-intensity control technique with RF-knockout slow-extraction has been studied and developed at the HIMAC synchrotron. Based on a simple one-dimensional model of extraction, the function of amplitude modulation (AM) for a transverse RF-field was analytically calculated to control the beam current. By cooperating with the feedback system, finally, we could control the beam intensity within a range of one order during a single flattop. We report on a simulation and the experiment result of intensity control for scanning irradiation.},
 pages = {32--35},
 title = {Intensity control in RF-knockout extraction for scanning irradiation},
 volume = {240},
 year = {2005}
}