| SUP012 ポスターセッション２ 8月4日 豊田講堂１階アトリウム 13:00 - 15:00 |
| 高速キッカー磁石のフェライトの特性影響 |
| Ferrite property effects on a fast kicker magnet |
| ○樊 �邨魁聞皀┘優襯�ー加速器研究機構），福岡 翔太（筑波大学），石井 恒次，杉本 拓也（ 高エネルギー加速器研究機構） |
| ○Kuanjun Fan (High Energy Accelerator Research Organization), Shota Fukuoka (University of tsukuba), Koji Ishii, Takuya Sugimota (High Energy Accelerator Research Organization) |
| Nickel Zinc ferrite materials are widely used in high speed pulse magnetic devices. The J-PARC main ring employs Ni-Zn ferrite kicker magnets in both fast extraction system and injection system. In order to generate high speed magnetic field, the magnetization rate in the ferrite is very high, which might cause magnetic losses due to the induced eddy current. In addition, kicker magnets also contribute significant coupling impedance to J-PARC MR, which is determined by the frequency dependent material property of complex permeability. Thus, the ferrite material properties need to be studied thoroughly to improve the kicker performance. A transmission type kicker that can generate arbitrary waveform of kicker field is being developed for the injection error correction. It requires very fast magnetization rate, which imposes severe demands on the ferrite properties. In order to estimate the effects of ferrite properties, 3D numerical studies are carried out. Different ferrite materials are studied to optimize the design. This paper gives the calculation results of coupling impedance, image currents and power loss of the kicker magnet. |