Accession Number:

AD0729914

Title:

The Electrostatic Potential Inside a Hemisphere: Its Use as an Electron Energy Analyzer and as a Triode Electronic Device.

Descriptive Note:

Physical sciences research papers,

Corporate Author:

AIR FORCE CAMBRIDGE RESEARCH LABS L G HANSCOM FIELD MASS

Personal Author(s):

• Frederickson,A. R.
• Jasperse,J. R.
• Grossbard,Neil

Report Date:

1971-06-23

Pagination or Media Count:

54.0

Abstract:

The Dirichlet Greens function for the interior of a hemisphere has been found and an integral expression for the electrostatic potential is given. A computer program has been written to calculate the potential and plot equipotential lines for cases with azimuthal symmetry in internal charge distribution and surface potential. Graphs of phi are given for an evacuated hemispherical chamber where the walls are divided into three elements. This triode configuration can be used as a vacuum tube device or as a retarding potential analyzer. The use of the device as an energy analyzer is discussed and methods for calculating its spectral response are given. A particular model of the device has been successfully used to measure low-energy electron emission due to high energy radiation. Author

Descriptors:

• *ELECTROSTATIC FIELDS
• POTENTIAL THEORY
• VOLTAGE
• ELECTRON IRRADIATION
• TRIODES
• COMPUTER PROGRAMS

Subject Categories:

• Electricity and Magnetism

Distribution Statement:

APPROVED FOR PUBLIC RELEASE