Optics-Based First Measurement of Currents on a Load of X-Pinch System at Seoul National University*

A X-pinch system is capable of generating high energy density plasmas with pulsed and large currents through a pair of crossed thin wires. Recently, we have developed a modular X-pinch device at Seoul National University [1]. With an aim of obtaining basic characteristics of the X-pinch system, we have developed and installed an optics-based current sensor utilizing the effect of Faraday rotation. We use a 100mW 1310nm cw laser and a photo-detector measuring light intensity passing through a single mode fiber acting as a sensor wound around the load and a polarizing fiber acting as an analyzer. We present configuration of our optics-based current measurement system and its first measurement together with a Rogowski coil measurement results for comparisons.