提出一种针对轴向B-dot束流偏角探测器信号的频域处理方法,从探测器本身的频域响应出发,并从探测器信号的频谱中提取有效信息,能够一定程度上消除束流横向偏移对偏角测量的干扰。该方法是对时域分析法处理轴向B-dot信号的一种补充,相比于时域法的一阶近似,对信号频谱的处理更接近对复杂真实情况的近似,但并未从根本上解决由安装误差等原因导致束流横向偏移而带来的测量不准确。从标定试验台测试结果来看,该方法的测试精度与时域法相当,约1 mrad。

A new method with frequency domain processing was used in processing the output signals of axial B-dot beam angle monitor. By this method, the valuable signals were derived from the signals in frequency domain with other disturbing signals eliminated and with a certain amount that were related with beam position. This method is a good complement to that with time domain processing and more suitable for modeling of actual complex axial B-dot circuit, but the measurement errors caused by the alignment error could not be reduced while the displacements of beam are large. The measurement error of frequency domain processing was approximate to that of time domain processing with value of 1 mrad according to the measurement using a test stand.