Instrumentation Development to Measure Camoflet Size
Abstract
This report summarizes results of 2 months of design and testing. The objective was to develop instrumentation capable of recording the time dependent growth of the camoflet produced by a buried explosive charge by using the conductive properties of an ionized gas. The initial instrument consisted of a heavy steel pipe probe containing evenly spaced twisted wire-pairs. Each twisted wire-pair led to an electronic logic circuit which changed state when ionized gas completed the electrical circuit through the ends of the twisted wires. An oscilloscope recorded the series of waves produced by completing the circuit through several spaced wire-pairs by the expanding ionized gaseous explosive detonation products. Test results indicated that the ionization concept is valid for this application, but the electronic logic system used should be hardened to withstand higher shock pressures. More meaningful results may also be obtained by use of three or more probes per test since the camoflet did not seem to be symmetric. Another system of detection, such as a photo-transistor light detector, may add additional reliability to the system and is recommended for investigation. This system would use the light from the incandescent gaseous detonation products to measure the camoflet expansion rate.
Document Details
- Document Type
- Technical Report
- Publication Date
- Dec 01, 1977
- Accession Number
- ADB027957
Entities
People
- Hans R. Fueher
- John W. Keeser Jr.