Two-dimensional mapping of electron densities and temperatures using laser-collision induced fluorescence.
We discuss the application of the laser-collision induced fluorescence technique to produce two-dimensional maps of both electron densities and electron temperatures in a helium plasma. A collisional-radiative model is used to describe the evolution of electronic states after laser excitation. We discuss generalizations to the time dependant results that are used to simplify data acquisition and analysis. Calibration of the predictions made by the model is achieved using an cw rf discharge that is periodically perturbed via a high voltage pulse. We then demonstrate the capability of the technique by producing images of electron density and temperature of the sheath region formed around a biased electrode.
- Research Organization:
- Sandia National Laboratories
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- AC04-94AL85000
- OSTI ID:
- 1021617
- Report Number(s):
- SAND2010-4889C
- Country of Publication:
- United States
- Language:
- English
Similar Records
LIF Measurements on an Atomic Helium Beam in the Edge of a Fusion Plasma--possible derivation of the electron density
2D laser-collision induced fluorescence in low-pressure argon discharges