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VOLUME 37 (1983) | ISSUE 1 | PAGE 8
Stabilization of a charged liquid-helium surface
A method is proposed for raising the critical density of electrons suspended above a liquid-helium surface. The idea is to use a fine-structure dielectric substrate wetted with superfluid helium. Experimentally, an electron charge density ~ 8 Χ 109 cm"2 has been achieved. This charge density is —3.5 times the critical density of electrons suspended above a free helium surface.