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:

1984-09-30

Pagination or Media Count:

42.0

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 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.

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
• Thermodynamics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE