Reducing the Energy Consumption of a Laser Photo-Acoustic SF 6 Gas Analyzer

摘要

Experimental studies of the operating modes of a laser photo-acoustic SF~(6)gas analyzer that were aimed at reducing its energy consumption were carried out. It was shown in the experiments that an average power of CO~(2)laser radiation of at least 100 mW is required for the assured detection of low SF~(6)concentrations (less than 100 ppb). To reduce the energy consumption of the gas analyzer, it is proposed to decrease the repetition frequency of CO~(2)laser pulses by several times and operate on subharmonics of the resonance frequency of the photo-acoustic detector. The experimental results made it possible to reduce the energy consumption of the gas analyzer to ~15 V A and use a Li-ion battery from a laptop to power it. The duration of the continuous operation of the gas analyzer on one battery charge was at least 6 h.