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Advanced Diagnostics Navigation

• Atomic and molecular species, positive and negative ions
  • Laser-Induced Fluorescence (LIF) and Two-Photon Absorption LIF (TALIF)
    • Nanosecond LIF/TALIF
    • Femtosecond TALIF
    • CW LIF for measurements of Ar and Xe ion and atom VDFs
  • Radar Resonant Enhanced Multi-Photon Ionization (Radar REMPI)
• Characterization of plasma, chemical composition and dynamic behavior
  • Optical Emission Spectroscopy (OES)
  • Fourier Transform Infrared Spectrometry
  • Fast Imaging
  • Electrostatic Quadrupole Mass Spectrometer and Energy Analyzer
  • Electrostatic probes
• Electron velocity distribution function, gas flow velocity and temperature
  • Thomson, Raman, and Rayleigh scattering
  • Hybrid Coherent Anti-Stokes Raman Scattering (Hybrid CARS)
  • Femtosecond Laser Electronic Excitation Tagging (FLEET)
• Electric field and space potential
  • Electric Field-Induced Second Harmonic Generation (E-FISH)
  • Electrostatic probes
• Nanoparticle Diagnostics
  • Laser-Induced Incandescence (LII)
  • Laser-Induced Breakdown Spectroscopy (LIBS)
  • Coherent Rayleigh-Brillouin Scattering (CRBS)
  • Laser-Stimulated Photodetachment (LSPD)
• Surface Diagnostics
  • Surface Second Harmonic Generation (SHG)
  • Electron-induced Secondary Electron Emission and Surface Charging Measurements
  • Surface Potential Measurements with the Kelvin Probe Diagnostic

Fast Imaging

Diagnostics for evolution of short processes on time-scale of below ns (i.e. ionization wave propagation)

Diagnostics for bulk plasma fluctuations at rate of 500 frames per second

Spectral imaging 2-D distribution of specific species

Imaging diagnostics will be utilized to monitor the dynamic behavior of the plasma, including entire system and selected species. For the latter, fitting the camera with a narrow bandpass optical filter allows monitoring the spatial and temporal evolution of certain atomic molecular and atomic species (see spectral imaging example below).

PPPL lab is equipped with nanosecond ICCD cameras, capable working with minimal exposure of 2-3 ns (Andor iStar and PiMax 3) and with a camera (4Picos) having a minimal exposure of 200 ps. These cameras are suitable for capturing the evolution of short and low-light processes in plasmas.

PPPL lab is also equipped with a fast-framing Phantom V7.3 camera, capable of operating at 500k frames per second rate, with minimal exposure of 1 μs. The fast framing camera is suitable for tracking bulk movement of plasma, oscillations and striations formation in the plasmas, especially the non-repetitive behaviors.

  This capability is located at the Princeton Plasma Physics Laboratory.