Investigation of a low density plasma utilizing laser light scattering.
Koeber, Charles John
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Measurement of plasma density and temperature was attempted using the technique of scattering laser light from the plasma and comparing the magnitudes of the scattered and input intensities. Although no significant results were obtained, a scattered signal was apparently obtained using a giant pulse laser. Both PIN photodiodes and photomultiplier tubes were used as detectors, and comparison showed the photomultipliers were more suitable. The most important results were modification of the laser to operate with a Pockels cell in a "Q"-switched mode, improvement of the optical alignment system, and use of a light trap to eliminate internal reflected signals.
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