“神龙一号”新型束位置探测器研究

Research on New BPM Used to“Dragon I”

介绍了钮扣电极的应用原理,并且在原理上与电阻环探测器作了比较,分析了这两种探测器各自的优缺点．根据原理实验的结果,重新设计了钮扣电极测量装置．对原测量盘结构上不合理的地方进行了改进,并且在新设计中考虑了“神龙一号”加速器的高真空密封．在“神龙一号”的强流束实验中,钮扣电极如实地反映了束流的波形以及束心的偏移量,其束位置曲线与电阻环曲线基本吻合,亦证明了钮扣电极的测量数据是可信的．在实验中钮扣电极的测量不确定度达到0．5mm,满足“神龙一号”强流束实验的测量需要．

The principle of beam position monitoring of button was introduced briefly. It was compared with beam bugs in principle. Based on the result in simulation experiment, a new structure of button was design, and some mistakes in the primary design was correctted. In the realy beam experiment of ＂Dragon Ⅰ ＂, the beam waveform and position were monitored. Compared the position curve between button and beam bugs, that indicated the data that got form button is credible. In the experiment, the button have an accuracy of 0.5mm, which is adequate for beam position measurement of ＂Dragon Ⅰ ＂ .