Sample interview questions: Have you worked with different plasma diagnostic techniques? If so, which ones?
Sample answer:
Yes, I have extensive experience working with various plasma diagnostic techniques:
- Spectroscopic Techniques:
- Emission Spectroscopy: Analyzing the emission of light in different spectral regions (e.g., visible, ultraviolet, X-ray) to deduce information about plasma parameters like electron density, temperature, and species composition.
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Absorption Spectroscopy: Measuring the absorption of light to determine the presence and concentration of specific atoms or molecules in the plasma.
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Langmuir Probe Diagnostics:
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Single/Double Langmuir Probe: Measuring the current-voltage characteristics of a probe immersed in the plasma to determine plasma density, electron temperature, and other plasma parameters.
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Mass Spectrometry:
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Quadrupole Mass Spectrometer: Analyzing the mass-to-charge ratio of ions in the plasma to identify and quantify various ion species.
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Interferometry:
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Mach-Zehnder Interferometer: Visualizing plasma density variations by analyzing the interference patterns of split and recombined laser beams passing through the plasma.
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Thomson Scattering:
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Determining plasma electron temperature and density by measuring the scattering of laser light from free electrons in the plasma.
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Microwave Diagnostics:
- Microwave Reflectometry: Measuring the reflection of microwaves from the plasma to deduce its density profile.
- Electron Cyclotron Emission (ECE) Spectroscopy: Analyzing the ECE radiation emit… Read full answer