An improved matrix method for magnet shimming in compact cyclotrons

An improved matrix method for magnet shimming in compact cyclotrons
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紧凑型回旋加速器磁体匀场的改进矩阵法

DOI:
10.1016/j.nima.2010.03.135
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发表时间:
2010-08
期刊:
Nuclear Instruments and Methods In Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
影响因子:
--
通讯作者:
Fan, M. W.
Fan, M. W.
中科院分区:
其他
文献类型:
--
作者:
Qin, B.;Chen, D. Z.;Zhao, L. C.;Yang, J.;Fan, M. W.

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紧凑型回旋加速器的磁场匀场一般由迭代过程组成。通过数值积分计算出离子沿半径方向沿着的旋转频率,得到等离子体场误差。等容磁场误差转化为磁极几何形状变化的方法是磁体设计和磁场匀场的关键环节。与以往的匀场方法相比,提出了一种多元线性回归与系统人工平差相结合的改进矩阵方法。研究表明,该方法具有快速收敛的场等时性,同时保持稳定和安全的特性,在匀场过程中。
The magnet shimming of compact cyclotrons generally consists of iterative procedures. The isochronous field error can be obtained with accurate ion gyration frequency along the radius calculated by numerical integration. The method related on the transformation from the isochronous field error to the geometry change of the magnet pole is a critical procedure during magnet design and field shimming. Compared with previous shimming schemes, an improved matrix method combining multiple linear regression with systematic artificial adjustment is proposed. The study demonstrated that the proposed method has a fast convergence for field isochronism, while maintaining stable and safety characteristics during shimming process.
DOI: --
发表时间: 2006
期刊: --
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