Development of an Electro-Optic Device for in-situ Measure
Development of an Electro-Optic Device for in-situ Measure
Beverly J. Klemme Sandia National Laboratories
We describe the development of a Pockel’s cell based electro-optic device designed to measure the amplitude of high voltage pulses in our new Pulsed High Voltage Measurement System (PHVMS) with a repeatability greater than 0.5% (k=2). The PHVMS is capable of generating voltage pulses ranging from 2kV to 325kV in amplitude, with pulse durations from 2.5 ìsec to 25 ìsec. The Primary Standards Laboratory • AC Project at Sandia National Laboratories is in the process of validating the PHVMS for calibrating resistive and capacitive voltage dividers. Single voltage pulses are difficult to measure with uncertainties <1% (k=2) because of the high bandwidth involved (>10MHz) and their non-repetitive nature which currently rules out standard AC measurement and signal averaging techniques in our system. We are in the process of developing an electro-optic voltage calibrator that will be tested as a possible candidate for insitu voltage measurements inside the mineral oil bath of the PHVMS and in close proximity to the device under test.
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