Electromagnetic Compatibility In High-power Microwave Experiments

Electromagnetic Compatibility (EMC) can be defined as the ability of equipment or a system with which the equipment or the system can work normally in its electromagnetic environment without bringing any unendurable electromagnetic annoy. Along with the fast development and extensive application of the high and new technology such as micro-electronics, information technology, modern communication, EMC has become an important technology problem which mankind urgently pay attention to and want to solve. As all know, many measures, such as shielding, wave filtrating, reasonable ground connection, reasonable layout, are very validated of restraining the interference. They are extensively adopted in the engineering practice. The solution of EMC in measurement is also one of very important problems in laboratory.To keep a laboratory away from the electromagnetic interference, the grounding grid must be carefully designed and manufactured. In this paper, the design of the grounding grid with the length of 46 meter, the width of 21 meter, and the grounding resistance of less than 0.5 ohm in our laboratory is presented. Furthermore, the measurement of the grounding resistance is discussed.A fast response magnetic loop current monitor has been developed to measure relativistic electron beam return currents. This simple monitor is so thin that it can be placed between segments of return current path in the diode or drift tube regions. Moreover, it is insensitive to flashover, beam, plasma bombardment, and radiation effects. As a result it is very convenient to be used in measurement. This paper has presented the theoretic analysis and simulation of the magnetic loop current monitor.