High-Power Electrostatic Discharges in PETN: Threshold and Scaling Experiments

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There is a considerable set of data establishing the safety of PETN-based detonators that are insulted by electrostatic discharge (ESD) from a human body. However, the subject of ESD safety has garnered renewed interest because of the sparse data on high-power, low-impedance discharges that result when the source is a metallic object such as a tool. Experiments on as-built components, using pin-to-cap fault circuits through PETN-based detonators, showed significant evidence of a power dependence but with a very broad energy threshold and some uncertainty in the breakdown path. We have performed a series of experiments using a well-defined arc discharge ... continued below

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Liou, W; McCarrick, J F; Hodgin, R L & Phillips, D F March 5, 2010.

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Description

There is a considerable set of data establishing the safety of PETN-based detonators that are insulted by electrostatic discharge (ESD) from a human body. However, the subject of ESD safety has garnered renewed interest because of the sparse data on high-power, low-impedance discharges that result when the source is a metallic object such as a tool. Experiments on as-built components, using pin-to-cap fault circuits through PETN-based detonators, showed significant evidence of a power dependence but with a very broad energy threshold and some uncertainty in the breakdown path. We have performed a series of experiments using a well-defined arc discharge path and a well-characterized source that is capable of independent variation of energy and power. Studies include threshold variation with power, arc length, powder surface area, and surface vs. bulk discharge paths. We find that an energy threshold variation with power does not appear to exist in the tested range of fractions to tens of MW, and that there are many subtleties to proper energy and power bookkeeping. We also present some test results for PBX 9407.

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PDF-file: 12 pages; size: 0.6 Mbytes

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  • Presented at: 14th International Detonation Symposium, Coeur d'Alene, ID, United States, Apr 11 - Apr 16, 2010

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  • Report No.: LLNL-CONF-425261
  • Grant Number: W-7405-ENG-48
  • Office of Scientific & Technical Information Report Number: 978404
  • Archival Resource Key: ark:/67531/metadc930257

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  • March 5, 2010

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  • Nov. 13, 2016, 7:26 p.m.

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  • Dec. 5, 2016, 7:44 p.m.

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Liou, W; McCarrick, J F; Hodgin, R L & Phillips, D F. High-Power Electrostatic Discharges in PETN: Threshold and Scaling Experiments, article, March 5, 2010; Livermore, California. (digital.library.unt.edu/ark:/67531/metadc930257/: accessed December 14, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.