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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

Optical Emission Spectroscopy (OES)

Identification of excited species emitting in UV-NIR range

Diagnostics for plasma electron density and electron/excitation temperature

Spatial resolution ≥ 0.5 mm, temporal resolution ≥ 200 ps

Optical emission spectroscopy allows non-perturbing characterization of plasma parameters survey of atomic and molecular species via the emission from excited levels. High spectral resolution approach is employed for determination plasma characteristics via line broadening or vibrational\rotational molecular temperatures. Low resolution broadband spectroscopy is used for identification of excited species in plasma.

PPPL lab is equipped with a variety of spectrometers, some equipped with multiple gratings and offering different resolutions from 0.05 to 3 A per pixel on the detector and capable of capturing emission in the range of 220- 2000 nm.

  This capability is located at the Princeton Plasma Physics Laboratory.