Low-frequency electromagnetic measurements at the NPE and Hunter`s Trophy: A comparison

Conference · Sat Dec 31 00:00:00 EST 1994

OSTI ID:96014

Sweeney, J J ^[1]

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1. Lawrence Livermore National Lab., CA (United States)

Sensors and recorders were deployed for both the Non-Proliferative Experiment (NPE) and Hunter`s Trophy to measure low-frequency (1-30 Hz) electric and magnetic fields accompanying the detonation. Two stations were used for each event, located at a slant range of about 500 m, with measurements of orthogonal horizontal electric field and orthogonal horizontal and vertical magnetic field. Signals were recorded digitally with at 200 Hz sampling rate. Separate magnetic and electric signals were recorded which can be related both to the detonation and the arrival of the shock wave. The detonation time signal from the nuclear explosion is a relatively short pulse occurring with no detectable delay (within 0.5 ms) ranging from 11-19 ms after the detonation time. The cause of the initial electromagnetic signal for both chemical and nuclear explosions is unknown; the differences between the NPE and Hunter`s Trophy results may be related to the different mechanisms involved with plasma generation between nuclear and chemical explosions.

• Research Organization: Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
• OSTI ID: 96014
• Report Number(s): CONF-9404100-; ON: DE95011413; TRN: 95:005144-0035
• Resource Relation: Conference: Symposium on the non-proliferation experiment results and implications for test ban treaties, Rockville, MD (United States), 19-21 Apr 1994; Other Information: PBD: [1994]; Related Information: Is Part Of Proceedings of the symposium on the Non-Proliferation Experiment (NPE): Results and implications for test ban treaties; Denny, M.D.; Stull, S.P. [eds.]; PB: 599 p.
• Country of Publication: United States
• Language: English

Related Subjects

45 MILITARY TECHNOLOGY, WEAPONRY, AND NATIONAL DEFENSE
35 ARMS CONTROL
AMMONIUM NITRATES
DETONATIONS
FUEL OILS
NON-PROLIFERATION TREATY
VERIFICATION
CHEMICAL EXPLOSIONS
COMPARATIVE EVALUATIONS
ELECTROMAGNETIC PULSES
DETECTION
NUCLEAR EXPLOSIONS
NUCLEAR EXPLOSION DETECTION
UNDERGROUND EXPLOSIONS
NEVADA TEST SITE
MAPS
WAVE PROPAGATION
TUNNELS
ELECTRIC FIELDS
MAGNETIC FIELDS
DATA ACQUISITION SYSTEMS