Accession Number : ADA162392
Title : Fundamental Experiments at Liquid Helium Temperatures (Low Temperature Studies of Anomalous Surface Shielding and Related Phenomena).
Descriptive Note : Final rept. 10 Jan 79-30 Sep 84,
Corporate Author : STANFORD UNIV CA DEPT OF PHYSICS
Personal Author(s) : Fairbank,William M ; Madey,John M J
Report Date : 30 Sep 1984
Pagination or Media Count : 42
Abstract : 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) V/m 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) V/m. 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.
Descriptors : *FREE ELECTRONS , *CRYOGENICS , *FREE FALL MODELS , ANOMALIES , LOW TEMPERATURE , PLASMAS(PHYSICS) , TRANSITION TEMPERATURE , COPPER , WALLS , SHIELDING , GRAVITY , ELECTROMAGNETIC SHIELDING , TUBES , LIQUID HELIUM
Subject Categories : Electricity and Magnetism
Distribution Statement : APPROVED FOR PUBLIC RELEASE