Electrical modeling of semiconductor bridge (SCB) BNCP detonators with electrochemical capacitor firing sets

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In this paper the authors describe computer models that simulate the electrical characteristics and hence, the firing characteristics and performance of a semiconductor bridge (SCB) detonator for the initiation of BNCP [tetraammine-cis-bis (5-nitro-2H-tetrazolato-N{sup 2}) cobalt(III) perchlorate]. The electrical data and resultant models provide new insights into the fundamental behavior of SCB detonators, particularly with respect to the initiation mechanism and the interaction of the explosive powder with the SCB. One model developed, the Thermal Feedback Model, considers the total energy budget for the system, including the time evolution of the energy delivered to the powder by the electrical circuit, as ... continued below

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12 p.

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Marx, K. D.; Ingersoll, D. & Bickes, R. W., Jr. November 1998.

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  • Sandia National Laboratories
    Publisher Info: Sandia National Labs., Albuquerque, NM (United States)
    Place of Publication: Albuquerque, New Mexico

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Description

In this paper the authors describe computer models that simulate the electrical characteristics and hence, the firing characteristics and performance of a semiconductor bridge (SCB) detonator for the initiation of BNCP [tetraammine-cis-bis (5-nitro-2H-tetrazolato-N{sup 2}) cobalt(III) perchlorate]. The electrical data and resultant models provide new insights into the fundamental behavior of SCB detonators, particularly with respect to the initiation mechanism and the interaction of the explosive powder with the SCB. One model developed, the Thermal Feedback Model, considers the total energy budget for the system, including the time evolution of the energy delivered to the powder by the electrical circuit, as well as that released by the ignition and subsequent chemical reaction of the powder. The authors also present data obtained using a new low-voltage firing set which employed an advanced electrochemical capacitor having a nominal capacitance of 350,000 {micro}F at 9 V, the maximum voltage rating for this particular device. A model for this firing set and detonator was developed by making measurements of the intrinsic capacitance and equivalent series resistance (ESR < 10 m{Omega}) of a single device. This model was then used to predict the behavior of BNCP SCB detonators fired alone, as well as in a multishot, parallel-string configuration using a firing set composed of either a single 9 V electrochemical capacitor or two of the capacitors wired in series and charged to 18 V.

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12 p.

Notes

OSTI as DE98005461

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  • 24. international pyrotechnics seminar, Monterey, CA (United States), 27-31 Jul 1998

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  • Other: DE98005461
  • Report No.: SAND--98-0137C
  • Report No.: CONF-980728--
  • Grant Number: AC04-94AL85000
  • DOI: 10.2172/665850 | External Link
  • Office of Scientific & Technical Information Report Number: 665850
  • Archival Resource Key: ark:/67531/metadc707120

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  • November 1998

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  • Sept. 12, 2015, 6:31 a.m.

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  • April 14, 2016, 3:39 p.m.

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Marx, K. D.; Ingersoll, D. & Bickes, R. W., Jr. Electrical modeling of semiconductor bridge (SCB) BNCP detonators with electrochemical capacitor firing sets, report, November 1998; Albuquerque, New Mexico. (digital.library.unt.edu/ark:/67531/metadc707120/: accessed October 20, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.