Accession Number : ADA293467

Title :   Theory and Simulation of Electrostatic Wave Turbulence in the Space Shuttle-Induced Plasma Environment.

Descriptive Note : Final rept. 3 Jan 90-30 Sep 94,

Corporate Author : MASSACHUSETTS INST OF TECH CAMBRIDGE DEPT OF AERONAUTICS AND ASTRONAUTICS

Personal Author(s) : Rivas, David R. ; Hastings, Daniel E.

PDF Url : ADA293467

Report Date : 30 SEP 1994

Pagination or Media Count : 313

Abstract : One of the important observations of the Plasma Diagnostic Package (PDP) experiments that were designed to probe the environment around the shuttle was the high degree of electrostatic turbulence in the ambient plasma compared to what has been observed from similar instruments flown on unmanned spacecraft. It is shown that the turbulence is caused by a process which involves the outgassing of water vapor from the shuttle orbiter, the subsequent collisional charge exchange of these water neutral molecules with ionospheric oxygen ions for form pick-up water ions, and the excitation of the beam-arc plasma instability. This is a new instability which is driven by the interaction of the beam-arc (i.e., asymmetric ring) velocity distribution function of the contaminating water ions with the background ionospheric plasma. (AN)

Descriptors :   *ELECTROSTATICS, *PLASMA WAVES, VELOCITY, MATHEMATICAL MODELS, COMPUTERIZED SIMULATION, IONOSPHERE, MAGNETIC FIELDS, EXPERIMENTAL DATA, ELECTRON DENSITY, TURBULENCE, ION BEAMS, OXYGEN, SPACE SHUTTLES, WAKE, CHARGE TRANSFER, NONLINEAR ANALYSIS, MAXWELLS EQUATIONS, INSTABILITY, ELECTROSTATIC CHARGE, DISTRIBUTION FUNCTIONS, WATER VAPOR, PLASMA DIAGNOSTICS, PARTICLE COLLISIONS, ION DENSITY, OUTGASSING, ION MOLECULE INTERACTIONS.

Subject Categories : Plasma Physics and Magnetohydrodynamics
      Electricity and Magnetism

Distribution Statement : APPROVED FOR PUBLIC RELEASE