Magnetic Field Measurements in Wire-Array Z-Pinches using Magneto-Optically Active Waveguides
- School of Applied and Engineering Physics, Cornell University, Ithaca, NY 14853 (United States)
- School of Electrical and Computer Engineering, Cornell University, Ithaca, NY 14853 (United States)
Understanding the magnetic field topology in wire-array Z-pinches as a function of time is of great significance to understanding these high-energy density plasmas especially for their ultimate application to stockpile stewardship and inertial confinement fusion. We are developing techniques to measure magnetic fields as a function of space and time using Faraday rotation of a single longitudinal mode (SLM) laser through a magneto-optically active bulk waveguide (multicomponent terbium borate glass) placed adjacent to, or within, the wire array in 1 MA experiments. We have measured fields >10 T with 100 ns rise times outside of a wire-array for the entire duration of the current pulse and as much as {approx}2 T inside a wire-array for {approx}40 ns from the start of current. This is the first time that such rapidly varying and large fields have been measured using these materials. In a dense Z-pinch, these sensing devices may not survive for long but may provide the magnetic field at the position of the sensor that can be used to corroborate magnetic probes, with which we compare our results.
- OSTI ID:
- 21255367
- Journal Information:
- AIP Conference Proceedings, Vol. 1088, Issue 1; Conference: 7. international conference on dense Z-pinches, Alexandria, VA (United States), 12-21 Aug 2008; Other Information: DOI: 10.1063/1.3079757; (c) 2009 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0094-243X
- Country of Publication:
- United States
- Language:
- English
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