Accession Number : AD0437919

Title :   RF HAZARD DETECTOR ADAPTED TO THE LITTLEJOHN MISSILE SYSTEM,

Corporate Author : ARMY MISSILE COMMAND REDSTONE ARSENAL ALA ARMY PROPULSION LAB AND CENTER

Personal Author(s) : Strickland,W. L.

Report Date : 26 FEB 1964

Pagination or Media Count : 20

Abstract : The thermistor type squib hazard detector was adapted to the LITTLEJOHN missile system to be used in an extensive RF hazard test at White Sands Missile Range. It is packaged inside the igniter case. The missile's squib circuit is unaltered electrically. The instrument, as it is designed and used, is sufficiently shielded to prevent any field effects on the detecting circuitry which might affect the validity of the data obtained. The detector measures temperature rise on the squib bridgewire and is not frequency sensitive. Its sensitivity is sufficient to detect a temperature rise on the bridgewire of the M-3 squib 57 db below the maximum no-fire level. A temperature rise on the bridgewire was detected when the LITTLEJOHN missile was subjected to a field strength as low as 0.013 volt per meter. This temperature change is much too small to be detected and measured by any other known instrumentation. (Author)

Descriptors :   (*RADIOFREQUENCY INTERFERENCE, DETECTION), (*DETECTORS, HAZARDS), (*EXPLOSIVES INITIATORS, HAZARDS), EXPLOSIVES INITIATORS, ELECTRIC DETONATORS, ELECTROMAGNETIC SHIELDING, ARTILLERY ROCKETS, RADIOFREQUENCY, SAFETY, TEMPERATURE WARNING SYSTEMS, THERMISTORS, CIRCUITS, EXPLODING WIRES

Distribution Statement : APPROVED FOR PUBLIC RELEASE