Fluctuation spectra in the NASA Lewis bumpy-torus plasma
Technical Report
·
OSTI ID:6416653
The electrostatic potential fluctuation spectrum in the NASA Lewis bumpy-torus plasma was studied with capacitive probes in the low pressure (high impedance) mode and in the high pressure (low impedance) mode. Under different operating conditions, the plasma exhibited electrostatic potential fluctuations (1) at a set of discrete frequencies, (2) at a continuum of frequencies, and (3) as incoherent high-frequency turbulence. The frequencies and azimuthal wave numbers were determined from digitally implemented autopower and cross-power spectra. The azimuthal dispersion characteristics of the unstable waves were examined by varying the electrode voltage, the polarity of the voltage, and the neutral background density at a constant magnetic field strength.
- Research Organization:
- National Aeronautics and Space Administration, Cleveland, OH (USA). Lewis Research Center
- OSTI ID:
- 6416653
- Report Number(s):
- N-78-26927
- Country of Publication:
- United States
- Language:
- English
Similar Records
Characteristics of the NASA Lewis Bumpy Torus plasma generated with high positive or negative applied potentials
Effect of anode ring arrangement on the spectroscopic characteristics of the NASA Lewis Bumpy Torus plasma
Fluctuations and turbulence in an electric field bumpy torus plasma
Technical Report
·
Wed Mar 31 23:00:00 EST 1976
·
OSTI ID:7216287
Effect of anode ring arrangement on the spectroscopic characteristics of the NASA Lewis Bumpy Torus plasma
Conference
·
Mon Dec 31 23:00:00 EST 1973
·
OSTI ID:4145989
Fluctuations and turbulence in an electric field bumpy torus plasma
Journal Article
·
Tue Mar 31 23:00:00 EST 1981
· J. Appl. Phys.; (United States)
·
OSTI ID:6530539