Accession Number : AD0747038

Title :   Reflectometer Diagnosis of Thin Boundary-Layer Plasma Sheaths.

Descriptive Note : Technical rept. Apr 69-Dec 71,

Corporate Author : COLUMBIA UNIV NEW YORK DEPT OF MICROBIOLOGY

Personal Author(s) : Zintsmaster,Logan R. ; Mayhan,J. W. ; Hodge,D. B. ; Caldecott,R. ; Davidson,R. S. , II

Report Date : APR 1972

Pagination or Media Count : 88

Abstract : A multiple-probe reflectometer technique is developed to diagnose the detailed structure of the boundary-layer plasma formed on high-performance reentry vehicles. This technique uses aperture reflection coefficients measured onboard at three discrete frequencies to determine an equivalent exponential electron density profile. Particular emphasis is placed on the turbulent boundary layer of a ballistic, hypersonic reentry vehicle at low altitudes. Aspects of the design are discussed; and system parameters are recommended for implementation. Data analysis programs are described. (Author)

Descriptors :   (*REENTRY VEHICLES, *PLASMA SHEATHS), (*ATMOSPHERE ENTRY, TURBULENT BOUNDARY LAYER), ELECTRON DENSITY, ANTENNA APERTURES, REFLECTOMETERS, BLACKOUT(PROPAGATION), NUMERICAL ANALYSIS, ABLATION

Subject Categories : Guided Missile Reentry Vehicles
      Plasma Physics and Magnetohydrodynamics

Distribution Statement : APPROVED FOR PUBLIC RELEASE