Bulletin of the American Physical Society
22nd Biennial Conference of the APS Topical Group on Shock Compression of Condensed Matter
Volume 67, Number 8
Monday–Friday, July 11–15, 2022; Anaheim, California
Session Y02: Characterization of Reactive and Energetic Materials I
9:15 AM–10:45 AM,
Friday, July 15, 2022
Anaheim Marriott
Room: Platinum 6
Chair: Alexandra Reinert, NSWC Crane
Abstract: Y02.00003 : Measurements of Sparks inside HE Fireballs*
9:45 AM–10:00 AM
Presenter:
Allen L Kuhl
(Lawrence Livermore Natl Lab)
Authors:
Nick Glumac
(University of Illinois)
Samuel Brunkow
(University of Illinois)
Allen L Kuhl
(Lawrence Livermore Natl Lab)
Vladimir Mozin
(Lawrence Livermore National Laboratory)
(i) a biconical (SAS-545) with bicon-spikes, with a frequency range of 30 MHz-1 GHz
(ii) a discone (EM6105) with a frequency range of 10 kHz-2 GHz
(iii) a high-frequency biconical (SAS-547) with a frequency range of 1 GHz-18 GHz
(iv) a passive loop (ETS-6511) with a frequency range of 20 Hz-5 MHz
The recorded RF signals were compared with the high-speed photography to correlate the physical phenomena. Also measured were the visualized spark lengths; these were correlated to RF frequencies using the monopole theory relation: where c is the speed of light and L the spark length. These were compared with spark lengths as predicted by the electrostatic version of our high-order Godunov code which simulates turbulent mixing in the HE fireball. LLNL-AABS-832909
*This research was funded by DOE
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