RF Bridge Electrical Conductivity Gauge for RMP-B Vehicle

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Abstract:

The Reentry Measurements Instrument Package (RMIP) on the Reentry Measurements Vehicle (RMV) is designed to measure properties of the boundary layer and wake for a sharp nosed, slender body. One of the experimental instruments is an rf bridge that measures the dc conductivity of the plasma sheath formed about the vehicle. Because conductivity is directly proportional to electron density, knowledge of the electron-neutral collision frequency is sufficient to determine the electron density from the conductivity. For the RMP-B vehicle, it is expected that the conductivity will be in the range 0.3 to 1.0 mho/m for a refrasil heat shield with 50 ppm Na or equivalent contaminants. The conductivity meter was designed with a dynamic range of 0.1 to 10.0 mho/m. The system study providing design criteria is reviewed. Detailed operational information on instrument performance is presented.

Author(s):
Mcpherson, Donald A. ; Gibb, O. ; Harbridge, Wallace B. ; Fuhs, Allen E.
Author Organization(s):
AEROSPACE CORP EL SEGUNDO CA
Funding Organization(s):
Space and Missile Systems Organization, Los Angeles AFS , CA
Document Type:
Technical Report/Technical Report
Publication Date:
1968 Jun 01
Pagination:
48

Security Markings

DOCUMENT & CONTEXTUAL SUMMARY

Distribution Code:
A - Approved For Public Release
Distribution Statement: Public Release

RECORD

Collection: TRECMS
Identifying Numbers
Report Number(s):
SAMSO-TR-68-238
Contract Number(s):
F04695-67-C-0158
Subject Terms
Modernization Areas:
Microelectronics
Communities of Interest:
Advanced Electronics
Descriptor(s):
boundary layer, electrical conductivity, measurement, electron density, radio frequency amplifiers, amplifiers, electrical properties, electrons, frequency, heat shields, impedance, telemetry, high gain, plasma sheaths, test fixtures, boundaries, calibration
Keyword(s):
CONDUCTIVITY METERS, SHARP BODIES
Subject Categories:
Test Equipment, Research Facilities and Reprography; Guided Missle Technology; Physics; Physics
Update Date:
2022 Nov 08