Optical Emission Spectroscopy
Advanced Diagnostics Navigation
- Atomic and molecular species, positive and negative ions
- Laser-Induced Fluorescence (LIF) and Two-Photon Absorption LIF
- Radar Resonant Enhanced Multi-Photon Ionization (Radar REMPI)
- Characterization of plasma, chemical composition and dynamic behavior
- Electron velocity distribution function, gas flow velocity and temperature
- Electric field and space potential
- Nanoparticle Diagnostics
- Secondary Electron Emission
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.