Accession Number : ADA483974


Title :   Advanced Electrodynamic Tether Systems: Modeling of Scattering and Unsteady Effects


Descriptive Note : Final rept. 1 Jun 2005-30 N0v 2007


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


Personal Author(s) : Martinez-Sanchez, Manuel ; Batishchev, Oleg


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a483974.pdf


Report Date : 06 Jun 2008


Pagination or Media Count : 240


Abstract : This work addresses the needs for advanced computational tools and theoretical models devoted to the study of two interrelated topics of interest to the Air Force: Radiation Belt Remediation (RBR) and potential use of tethers as low frequency oscillators/radiators. Both problems stretch the capabilities of existing numerical methods, while connecting with a body of previous work on probe theory, spacecraft-plasma interactions and electrodynamic tether propulsion. The Electrostatic RBR application would typically require MV-level potentials and complex, multi-strand wire arrangements. The high voltages imply extreme disparity of length scales, as well as relativistic conditions in some cases. The geometrical complexity and driving physical processes may require 3D capabilities, particularly when magnetic effects cannot be ignored. For its part, the study of sheath ion or electron oscillations in the vicinity of a high power radiating tether requires tracking of a time-dependent sheath boundary and use of boundary conditions that allow radiation escape while denying spurious reflections.


Descriptors :   *RADIATION BELTS , *MAGNETOSPHERE , *SCATTERING , *SPACE ENVIRONMENTS , *ELECTROSTATICS , *MATHEMATICAL MODELS , HIGH VOLTAGE , POISSON EQUATION , RADIATORS(GENERAL) , PLASMA WAVES , COMPUTATIONS , IONS , OSCILLATORS , PROTONS


Subject Categories : Astrophysics
      Nuclear Physics & Elementary Particle Physics
      Plasma Physics and Magnetohydrodynamics


Distribution Statement : APPROVED FOR PUBLIC RELEASE