Conference Proceeding

Experimental and Theoretical Analyses of Explosively-Formed Fuse (EFF) Opening Switches

Los Alamos Nat. Lab., Los Alamos, NM
12/2006; DOI:10.1109/MEGAGUSS.2006.4530692 ISBN: 978-1-4244-2061-2 pp.301 - 306 In proceeding of: Megagauss magnetic field generation and related topics, 2006 ieee international conference on
Source: IEEE Xplore

ABSTRACT The EFF is used at Los Alamos as the primary opening switch for high current applications. It has interrupted currents from ~10 kA to 25 MA, thus diverting the current into low inductance loads. To understand and optimize the performance of full-scale experiments, many parameters were studied in a series of small-scale experiments, including: electrical conduction through the explosive products; current density; explosive initiation; insulator type; conductor thickness; conductor metal; metal temper; and on. The results show a marked inverse correlation of peak EFF resistance with current density. In this paper we postulate and refute a simple extrusion mechanism of EFF operation; demonstrate that the EFF switch has a near-ideal profile for producing flat-topped voltage profiles; and explore possible mechanisms for the degradation of small scale switch performance.

0 0
 · 
0 Bookmarks
 · 
15 Views
Data provided are for informational purposes only. Although carefully collected, accuracy cannot be guaranteed. The impact factor represents a rough estimation of the journal's impact factor and does not reflect the actual current impact factor. Publisher conditions are provided by RoMEO. Differing provisions from the publisher's actual policy or licence agreement may be applicable.

Keywords

conductor metal
 
current applications
 
current density
 
currents
 
EFF
 
EFF operation
 
electrical conduction
 
flat-topped voltage profiles
 
full-scale experiments
 
insulator type
 
Los Alamos
 
low inductance loads
 
marked inverse correlation
 
metal temper
 
near-ideal profile
 
peak EFF resistance
 
simple extrusion mechanism
 
small scale
 
small-scale experiments
 

D.G. Tasker