Diffusion wave technique applied to a magnetized helium positive column plasma
Thesis/Dissertation
·
OSTI ID:4352174
Thesis. A new technique was developed for exciting a one-dimensional diffusion wave transverse to the magnetic field in an active helium positive column plasma. A modulated electron beam is used to produce a sinusoidal plasma density perturbation along the axis of a quiet magnetized helium positive column plasma. The perturbation in plasma density dissipates radially from the axis as a diffusion wave. Radial profiles of amplitude and phase of the perturbation are measured with a movable Langmuir probe input to a phase-lock amplifier. The transverse diffusion coefficient is obtained by fitting a diffusion model to the amplitude and phase profiles. (auth)
- Research Organization:
- Colorado Univ., Boulder (USA)
- NSA Number:
- NSA-29-025732
- OSTI ID:
- 4352174
- Report Number(s):
- AD--763808; AFOSR-TR--73-1141
- Country of Publication:
- United States
- Language:
- English
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