为改善我国人民的医疗条件,中国原子能科学研究院串列加速器升级工程部正在研制一台能量为230 MeV的质子治疗用超导回旋加速器。该加速器平均磁场已达到磁铁材料的饱和区,材料的B-H曲线将对磁场产生极大的影响,所有的磁场计算将基于磁性材料B-H曲线开展,因此,磁性材料的B-H曲线测量非常重要。串列加速器升级工程部对该超导回旋加速器的材料进行了 To improve the medical conditions of our people, a series of proton therapy superconducting cyclotron with energy of 230 MeV is being developed by China Institute of Atomic Energy Research Tandem Accelerator Upgrade Engineering Department. The average magnetic field of the accelerator has reached the saturation region of the magnet material. The B-H curve of the material will exert a great influence on the magnetic field. All the magnetic field calculations will be based on the B-H magnetic material. Therefore, the B-H curve measurement of the magnetic material is very important. The Tandem Accelerator Upgrade Project conducted on the material of the superconducting cyclotron