Laboratory simulation of erosion by space plasma

Details Laboratory simulation of erosion by space plasma Laboratory simulation of erosion by space plasma

Apr 1976

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976stoor..10.....k&link_type=abstract

Stockholms Obs. Rep., No. 10, 2+31 p.

Physics

Erosion, Solar Wind, Solid Surfaces, Space Environment Simulation, Hydroxides, Interplanetary Dust, Scaling Laws, Sodium, Sputtering

Scientific paper

A laboratory experiment was made in which a plasma stream collides with targets made of different materials of cosmic interest. The experiment can be viewed as a process simulation of the solar wind particle interaction with solid surfaces in space, e.g. cometary dust. Special interest is given to sputtering of OH and Na. It is shown that the erosion of solid particles in interplanetary space at large heliocentric distances is most likely dominated by sputtering and by sublimation near the sun. The heliocentric distance of the limit between the two regions is determined mainly by the material properties of the eroded surface, e.g. heat of sublimation and sputtering yield, a typical distance being 0.5 a.u. It is concluded that the observations of Na in comets at large solar distances, in some cases also near the sun, is most likely to be explained by solar wind sputtering.

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