Cable bundle response in SGEMP analysis

Conference · Wed Dec 01 04:00:00 EST 1976 · IEEE Trans. Nucl. Sci.; (United States)

OSTI ID:7107321

Shaw, L E; Sheppard, T J

Assessment of the vulnerability of electronic systems to SGEMP requires the knowledge of currents and voltages appearing at individual interface circuits. Recent assessment practices treat coupling either as an interaction of the fields with each individual wire isolated from the remaining wires in the bundle, or as an interaction with all the wires in the bundle as a single entity. We describe here an effort to predict the coupling of the bulk current to individual wire current using both a detailed and simplified model of the cable bundle. The loads were chosen to represent a typical distribution of loads on a spacecraft, and the ability of the models to predict the coupling was investigated. Measurements of the coupling were made on two-cable bundles in the laboratory, and the results are compared to those predicted by the models. Calculations of the probability of survival of typical interface circuits show that the 10 dB accuracy to which the currents can be predicted with the simplified models requires only a modest increase in safety margin over the safety margin required with exact knowledge of the currents.

• Research Organization: TRW Defense and Space Systems Group, Redondo Beach, CA
• OSTI ID: 7107321
• Conference Information: Journal Name: IEEE Trans. Nucl. Sci.; (United States) Journal Volume: NS-23:6
• Country of Publication: United States
• Language: English

Related Subjects

440200* -- Radiation Effects on Instrument Components
Instruments
or Electronic Systems
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
CABLES
CONDUCTOR DEVICES
ELECTRIC CABLES
ELECTRICAL EQUIPMENT
ELECTROMAGNETIC PULSES
ELECTROMAGNETIC RADIATION
EMISSION
EQUIPMENT
HARDENING
PHOTOELECTRIC EFFECT
PHYSICAL RADIATION EFFECTS
RADIATION EFFECTS
RADIATION HARDENING
RADIATIONS
SECONDARY EMISSION