Sample interview questions: Describe your knowledge of plasma equilibrium reconstruction diagnostics.
Sample answer:
Diagnostics for Plasma Equilibrium Reconstruction
- Magnetic diagnostics:
- Magnetic probes and flux loops: Measure local magnetic field components to infer plasma current and flux surfaces.
- Rogowski coils and induction coils: Measure plasma current and its time derivative, providing information on the magnetic field profile.
- Spectroscopic diagnostics:
- Charge-exchange recombination spectroscopy (CXRS): Injects neutral atoms into the plasma, inducing electron capture and photon emission. Plasma rotation and impurities can be inferred.
- Doppler spectroscopy: Measures line-of-sight plasma velocity using the Doppler shift of spectral lines.
- Imaging diagnostics:
- Visible and infrared cameras: Capture images of the plasma, providing information on its shape, density, and temperature.
- Microwave reflectometry: Uses microwave pulses to probe the electron density profile…. Read full answer