Fundamental Experiments at Liquid Helium Temperatures (Low Temperature Studies of Anomalous Surface Shielding and Related Phenomena).
Final rept. 10 Jan 79-30 Sep 84,
STANFORD UNIV CA DEPT OF PHYSICS
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It was found that an electron in an evacuated dewar, falling under the influence of gravity, experiences a net force of 10-5 to 10-7 Vm from 300 to about 4.5 degrees-K. At 4.5 degrees-K there is a transition to a net force of zero to within 6 x 10-12 Vm. This effect has been traced to the creation of a 2-D surface plasma of free electrons on the walls of the copper free-fall tube at the transition temperature.
- Electricity and Magnetism