采用脉冲悬丝法测量强流加速腔聚焦场磁轴
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摘要: 介绍了利用脉冲悬丝法校正、测量加速腔磁轴，以及对10MeV LIA束输运系统中40cm长聚焦线圈磁轴偏差的测量，详细描述了实验装置和实验方法。从测得的电压波形可区分出磁轴的倾斜与偏移，并可辨别出倾斜与偏移的方向，在聚焦线圈轴向磁场最强为0.072T的条件下，通过多次实验改变悬丝电流从0 .3A到3.8A，并改变电流脉冲宽度从0.3ms到1.5ms，测出了40cm聚焦线圈磁轴的偏差，并给出了磁轴偏差分布的对应波形。测试灵敏度估计为磁轴倾斜1mrad, 偏移0.2mm。Abstract: This paper presents our research work on the pulsed taut – wire measurement of the magnetic alignment of the high current induction – cell. A fine taut – wire carrying a pulse current was put in the solenoid magnet, and observing the Lorentz force on the wire. If the magnetic axis is an offset or a tilt of the mechanical axis of the solenoid, the wave pattern produced by these errors are different from that produced by the correct one. In our experiments we changed the current pulse amplitude from 0.3A to 3.8A and its width from 300m s to 1.5ms, the length of the solenoid is 40cm, the centering error of the wire is ± 0.05mm. The tilt, the offset and their direction can be distinguished from the waveform. The experimental sensitivity of tilt we estimated is 1mard.Lastly to differentiate
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Key words:
- pulsed tuat – wire method /
- magnetic axis /
- high current induction – cell
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