Abstract

We report measurements of the toroidal plasma current in the high-beta tokamak SPICA II using a magnetooptic current sensor. Both the sine and cosine components of the angle of rotation are recorded during the current pulse. In this way, the overall accuracy is increased and a computer algorithm can be employed to calculate the value of the current. The effect of linear birefringence is taken into account. The system has a resolution of 1 kA, and a frequency range of DC to 1 MHz. The measured values of the plasma current (up to 350 kA) are in good agreement with the results of a Rogowski coil.

© 1987 Optical Society of America

Fiber-optic heterodyne phase-shift measurement of plasma current

George I. Chandler, P. R. Forman, F. C. Jahoda, and K. A. Klare
Appl. Opt. 25(11) 1770-1774 (1986)

Current measurement by Faraday effect on GEPOPU

Noemí Correa, Hernán Chuaqui, Edmund Wyndham, Felipe Veloso, Julio Valenzuela, Mario Favre, and Heman Bhuyan
Appl. Opt. 51(6) 758-762 (2012)

Influence of the optical fiber type on the performances of fiber-optics current sensor dedicated to plasma current measurement in ITER

Matthieu Aerssens, Frédéric Descamps, Andrei Gusarov, Patrice Mégret, Philippe Moreau, and Marc Wuilpart
Appl. Opt. 54(19) 5983-5991 (2015)

Alternating-current measurement and noninvasive data ring utilizing the Faraday effect in a closed-loop fiber magnetometer

M. Berwick, J. D. C. Jones, and D. A. Jackson
Opt. Lett. 12(4) 293-295 (1987)

High sensitivity optical fiber current sensor based on polarization diversity and a Faraday rotation mirror cavity

Hongying Zhang, Yongkang Dong, Jesse Leeson, Liang Chen, and Xiaoyi Bao
Appl. Opt. 50(6) 924-929 (2011)