Magnetic field calculation and shimming of the self-extraction cyclotron
Magnetic field calculation and shimming of the self-extraction cyclotron
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DOI：
10.1063/1.1435273
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发表时间：
2002-02
期刊：
影响因子：
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通讯作者：
W. Kleeven;W. Beeckman;S. Lucas;S. Zaremba;D. Vandeplassche;Y. Jongen
中科院分区：
文献类型：
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作者：
W. Kleeven;W. Beeckman;S. Lucas;S. Zaremba;D. Vandeplassche;Y. Jongen
自提取回旋加速器是一种14 MeV的氢离子机器，光束从其中提取而不需要偏转器。这是通过特殊的磁场形状来实现的。为了精确计算提取过程，建立了该回旋加速器的三维静磁模型。可移动极尖的摆振已被用于同步机器和消除谐波误差。为了加快这一过程的收敛速度，对该过程进行了软件仿真。得到了第一个提取光束。计算和测量结果吻合得很好。给出了TOSCA的计算、制图和调光结果。
The self-extraction cyclotron is a 14 MeV H+ machine from which the beam extracts without a deflector. This is achieved with a special shaping of the magnetic field. Detailed 3D magnetostatic models have been constructed of this cyclotron, in order to accurately calculate the extraction process. Shimming of removable pole tips has been used to isochronize the machine and to remove harmonic errors. A software simulation of the shimming has been made, in order to accelerate the convergence of this process. First extracted beam has been obtained. There is good agreement between the calculations and measurements. Results of TOSCA calculations, mapping and shimming are presented.