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Related Experiment Video

Updated: Jun 5, 2026

Non-equilibrium Microwave Plasma for Efficient High Temperature Chemistry

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

The Review of Scientific Instruments

|January 5, 2011

Summary

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.

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Measurement and Analysis of Atomic Hydrogen and Diatomic Molecular AlO, C2, CN, and TiO Spectra Following Laser-induced Optical Breakdown

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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.