Study on anti-interference of high voltage ultraviolet electroscope

In this paper, anti-interference technology, especially in anti-electromagnetic interference, was studied to aim at the problem on high voltage ultraviolet electroscope not working because of the strong electromagnetic interference (EMI) in high voltage (HV) surroundings. Several interferences were analyzed and EMI in HV environment was measured. The cause of the electroscope wrong triggering was discussed. Several anti-interference measures are presented and used in the electroscope design of electromagnetic compatibility (EMC). The electromagnetic shielding as the main part of the EMC design was also discussed. The contrast experiment proved that the anti-interference measures and design are validity to anti-interference and could ensure the electroscope working in the HV environment.