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| Effects of HEMP on Safety of Exploding Foil Initiator |
| Received:March 19, 2019 Revised:April 27, 2019 |
| View Full Text View/Add Comment Download reader |
| DOI：10.7643/issn.1672-9242.2019.09.006 |
| KeyWord:HEMP EFI induced current safety |
| Author | Institution |
| TONG Hong-hai |
Shaanxi Applied Physical Chemistry Research Institute, Xi′an , China |
| CHU En-yi |
Shaanxi Applied Physical Chemistry Research Institute, Xi′an , China |
| ZHOU Mi |
Shaanxi Applied Physical Chemistry Research Institute, Xi′an , China |
| WANG Yin |
Shaanxi Applied Physical Chemistry Research Institute, Xi′an , China |
| LI Jiao |
Shaanxi Applied Physical Chemistry Research Institute, Xi′an , China |
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| Abstract: |
| Objective To assess the safety of the exploding foil initiator (EFI) under the nuclear electromagnetic pulse. Methods The induced current of exploding foil under simulated high-altitude nuclear electromagnetic pulse (HEMP) was tested in a GTEM intensive EMP simulation system. HEMP mainly coupled energy on EFI by electromagnetic radiation to generate induced current on explosive foil, and monitor the electric field intensity of HEMP by optical fiber field intensity meter. An electric current loop was installed on the foot of the EFI to monitor the induced current waveform on explosive foil by oscilloscope. Results The same length of wires were connected on the two feet of the EFI, according to the length of wires, they were divided into six groups:5, 10, 20, 30, 40 and 50 cm. Each pair of wires were kept at 180 degrees, which might be equivalent to dipole antenna. The induced current increased with the increase of the wire length. The induced current and wire length were a linear relationship. Conclusion The induced current of EFI under HEMP is much less than the ignition current, and it has high tolerance and safety to HEMP. |
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