Accession Number:

ADA443407

Title:

Langmuir Probe Diagnostics of the VASIMR Engine

Descriptive Note:

Master's thesis

Corporate Author:

NAVAL POSTGRADUATE SCHOOL MONTEREY CA

Personal Author(s):

Report Date:

2005-12-01

Pagination or Media Count:

107.0

Abstract:

NASAs VAriable Specific Impulse Magnetoplasma Rocket Engine VASIMR will provide a highly efficient propulsion source that can dramatically reduce Martian transit times, provide for more abort contingencies, and protect astronauts from space radiation with its highly radiation-absorbent hydrogen fuel. The VASIMR is still in its developmental infancy and requires many years of research before its initial operational capability. Much is still unknown about the complex plasma interactions in the exhaust. A Langmuir probe was designed, constructed, and operated to determine current density radial profiles and total particle flux at various stages in the exhaust of VASIMR. The Langmuir probe results proved that the exhausts radial profile is Gaussian, experimentally validated predictions of magnetic field line dragging, and verified the ionization efficiency of VASIMR.

Subject Categories:

  • Plasma Physics and Magnetohydrodynamics
  • Rocket Engines

Distribution Statement:

APPROVED FOR PUBLIC RELEASE