Laboratory observations of impact-generated magnetic fields

Details Laboratory observations of impact-generated magnetic fields Laboratory observations of impact-generated magnetic fields

Nov 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988natur.336...50c&link_type=abstract

Nature (ISSN 0028-0836), vol. 336, Nov. 3, 1988, p. 50-52.

Physics

33

Hypervelocity Impact, Impact Melts, Magnetic Fields, Moon, Apollo 17 Flight, Electron Density Profiles, Radio Emission, Space Plasmas

Scientific paper

Laboratory experiments are reported which document spontaneous magnetic fields generated by low-angle, hypervelocity impacts in a low-field environment. Low-angle impacts enhance the production of a partially ionized vapor cloud which expands above the impact point. The observed spontaneous magnetic fields may result from runaway thermal electrons producing a toroidal field confined to this plasma and by nonaligned thermal and electron density gradients producing a vertical field within the target. These new observations hold promise both for experimentally probing early-time impact phenomena and for understanding the anomalously high thermal magnetic remanence observed in a young lunar impact melt returned by Apollo 17.

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