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Updated: Jun 5, 2026

Non-equilibrium Microwave Plasma for Efficient High Temperature Chemistry
Published on: August 1, 2017
Note: Zeeman splitting measurements in a high-temperature plasma
R P Golingo1, U Shumlak, D J Den Hartog
1Aerospace and Energetics Research Program, University of Washington, Seattle, Washington 98195-2250, USA. golingo@aa.washington.edu
New methods enable accurate magnetic field measurement in high-temperature plasmas using the Zeeman effect. This technique is crucial for understanding plasma behavior in devices like the ZaP Z-pinch.
Area of Science:
- Plasma physics
- Spectroscopy
- Magnetohydrodynamics
Background:
- The Zeeman effect is a standard diagnostic for magnetic fields in low-temperature plasmas.
- Traditional Zeeman spectroscopy is challenging in high-temperature plasmas due to spectral broadening.
Purpose of the Study:
- To develop and demonstrate a new method for simultaneous measurement of Doppler-broadened, circularly polarized Zeeman spectra.
- To accurately measure magnetic fields in high-temperature plasmas, specifically within the ZaP Z-pinch device.
Main Methods:
- Utilized new instrumentation for simultaneous recording of left and right circularly polarized Zeeman spectra.
- Measured spectra emitted parallel to the magnetic field from carbon impurities.
- Collected spectral data along multiple chords across the plasma cross-section.
Main Results:
- Successfully measured simultaneous Doppler-broadened Zeeman spectra in a high-temperature plasma.
- Determined the location of the Z-pinch current axis.
- Provided lower-bound estimates of local magnetic fields at radial locations.
Conclusions:
- The developed technique overcomes limitations of traditional Zeeman spectroscopy in high-temperature environments.
- This method allows for precise magnetic field mapping within Z-pinch plasmas.
- Enables better understanding of plasma dynamics and magnetic field configurations.
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