Hybrid monitor for both beam position and tilt of pulsed high-current beams

作者：Pang, J.^*; He, X.; Ma, C.; Zhao, L.; Li, Q.; Dai, Z.

来源：Review of Scientific Instruments, 2014, 85(9): 093305.

DOI：10.1063/1.4895643

A Hybrid beam monitor, integrated with both azimuthal and axial B-dot probes, was designed for simultaneous measurement of both beam position and beam angle for pulsed high-current beams at the same location in beam pipe. The output signals of axial B-dot probes were found to be mixed with signals caused by transverse position deviation. In order to eliminate the unwanted signals, an elimination method was developed and its feasibility tested on a 50-Omega coaxial line test stand. By this method, a waveform, shape-like to that of input current and proportional to the tilt angle, was simulated and processed by following integration step to achieve the tilt angle. The tests showed that the measurement error of displacement and tilt angle less than 0.3 mm and 1.5 mrad, respectively. The latter error could be reduced with improved probes by reducing the inductance of the axial B-dot probe, but the improvement reached a limit due to some unknown systemic mechanism.

• 出版日期2014-9
• 单位中国工程物理研究院; 中国工程物理研究院流体物理研究所