Uniform plasma is produced by using of radio frequency glow discharge,pollen grains charged negatively suspend at the sheath boundary.The distribution of particles is observed by laser scattering method and spatial resolution measurement,and then the distribution of the sheath is obtained.Experimental results show that with increasing the diameter of the ring,the distribution of the particles close to the glass wall and the convex sheath at the center of the glass ring becomes obvious.The radial distribution of sheath within large glass ring can be fitted with a quartic polynomial by using Matlab.Our results could contribute to the study of the complex motion of charged grains in dust plasma.
FENG Fan
,
ZHANG Yongliang
,
YAN Jia
,
HE Yafeng
. On the distribution of plasma sheath in a glass ring[J]. Journal of Hebei University(Natural Science Edition), 2016
, 36(1)
: 21
-25
.
DOI: 10.3969/j.issn.1000-1565.2016.01.005
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