Accession Number : ADA298453

Title :   Enhancement of Semiconductor Bridge Initiators for Ignition of Large-Caliber Ammunition.

Descriptive Note : Final rept. Oct 91-Sep 93,

Corporate Author : ARMY RESEARCH LAB ABERDEEN PROVING GROUND MD

Personal Author(s) : Howard, Stephen L. ; Chang, Lang-Mann

PDF Url : ADA298453

Report Date : JUN 1995

Pagination or Media Count : 36

Abstract : Semiconductor bridge initiators (SCBI) have been proposed as a means of initiating the ballistic cycle in large-caliber ammunition. However, an ignition delay of more than 10 ms for a black powder basepad was not acceptable for multicomponent tank ammunition. Enhancement of the output from the SCBI was needed to reduce the ignition delay to acceptable levels. Early experiments in a small-caliber ammunition simulator suggested that if the energetic igniter material were confined around the SCBI, the ignition delay would be drastically reduced. This work presents the results obtained from a fabricated booster that, when initiated by an SCBI, reduces the ignition delay of black powder basepads to submillisecond intervals. Results obtained from replacing black powder in the basepad and/or booster with ball powder indicated that usage of ball powder is not appropriate except in the case of black powder in the booster and ball powder in the basepad. This combination provided a strong ignition stimulus with a marginal ignition delay for the basepad of about 12 ms. jg p.3

Descriptors :   *SEMICONDUCTORS, *AMMUNITION, *IGNITION, *EXPLOSIVES INITIATORS, OUTPUT, OPTIMIZATION, HAZARDS, MATERIALS, CYCLES, ELECTROMAGNETIC RADIATION, CALIBRATION, STIMULI, ORDNANCE, ENERGETIC PROPERTIES, BALLISTICS, IGNITERS, BLACK POWDER, IGNITION LAG, BALL POWDER PROPELLANTS.

Subject Categories : Ammunition and Explosives
      Electrical and Electronic Equipment
      Combustion and Ignition

Distribution Statement : APPROVED FOR PUBLIC RELEASE