Measuring 20-100 T B-fields using Zeeman splitting of sodium emission lines on a 500 kA pulsed power machine

We have shown that Zeeman splitting of the sodium (Na) D-lines at 5890 and 5896 Å can be used to measure the magnetic field (B-field) produced in high current pulsed power experiments. We have measured the B-field next to a return current conductor in a hybrid X-pinch experiment near a peak current...

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Bibliographic Details
Published in:Review of scientific instruments 2016-11, Vol.87 (11), p.11D407-11D407
Main Authors: Banasek, J. T., Engelbrecht, J. T., Pikuz, S. A., Shelkovenko, T. A., Hammer, D. A.
Format: Article
Language:English
Subjects:
Conductors
DEPOSITS
EMISSION
EMISSION SPECTRA
ENERGY DENSITY
INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
MAGNETIC FIELDS
Measurement techniques
PEAKS
PLASMA
Plasmas (physics)
PULSES
Scientific apparatus & instruments
SODIUM
Splitting
WIRES
ZEEMAN EFFECT
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Summary:We have shown that Zeeman splitting of the sodium (Na) D-lines at 5890 and 5896 Å can be used to measure the magnetic field (B-field) produced in high current pulsed power experiments. We have measured the B-field next to a return current conductor in a hybrid X-pinch experiment near a peak current of about 500 kA. Na is deposited on the conductor and then is desorbed and excited by radiation from the hybrid X-pinch. The D-line emission spectrum implies B-fields of about 20 T with a return current post of 4 mm diameter or up to 120 T with a return current wire of 0.455 mm diameter. These measurements were consistent or lower than the expected B-field, thereby showing that basic Zeeman splitting can be used to measure the B-field in a pulsed-power-driven high-energy-density (HED) plasma experiment. We hope to extend these measurement techniques using suitable ionized species to measurements within HED plasmas.
ISSN:0034-6748
1089-7623
DOI:10.1063/1.4958912