Heat-leakage of Peltier current lead (PCL) with natural and water-cooling modes at its room-temperature terminals was simulated by finite element method (FEM). A twodimensional model of PCL with conduction cooling was established to obtain optimized parameters for natural air cooling (NAC) and water cooling (WC) at room-temperature terminals. Simulated results show that the minimum heat leakage is available at low current if the room-temperature termination is cooled by NAC and the minimum heat leakage easily obtains at high current if it is cooled by water.
This paper presents a new method for measuring AC field strength, with application of electrostriction effect of electrostrictive ceramics and technology of fiber Bragg grating. We use electrostriction effect to design the fiber-optic electric field sensor. This device turns the strain of electrostriction material influenced by electric field into the strain of fiber Bragg grating, then wavelength of feedback changes. We can get the strain of electrostriction material through the comparison between initial wavelength and wavelength of feedback, then measurement of electric field strength can be achieved by detecting the strain of electrostriction material. Experiments indicate that fiber-optic electric field sensor based on electrostriction effect is of effective value for measuring electric field strength, and the response of measuring system to AC electric field is linear. We apply an effective method for the research of measuring electric field strength.
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