A MODIFICATION OF THE IONIZATION METHOD ESPECIALLY SUITABLE FOR CONTINUOUSLY RECORDING CONTACT POTENTIAL DIFFERENCES

Abstract

Ions formed in their space between two different conducting surfaces will migrate in the electric field and produce a current in an external circuit proportional to the contact potential difference. Since the ionization method of measuring contact potential involves a direct-current output, it is more adaptable for continuous recording than are other methods, such as the vibrating condenser method. A study was made of the factors which minimize the inherent errors of the ionization method and of a modification which permits the use of an ordinary low-impedance-input dc chart-type voltmeter and the use of a wide air spacing desirable for certain applications. The modification is an accounting for errors introduced by a wide spacing between the ionizing source and the surface being studied, the wide spacing causing the air-space impedance to be comparable to the impedance of the indicating meter.

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Document Details

Document Type
Technical Report
Publication Date
Apr 11, 1963
Accession Number
AD0403869

Entities

People

  • K. Bewig

Organizations

  • United States Naval Research Laboratory

Tags

Communities of Interest

  • Materials and Manufacturing Processes

DTIC Thesaurus Topics

  • Accuracy
  • Air Gaps
  • Alpha Particles
  • Cathode Followers
  • Chemistry
  • Direct Current
  • Electric Fields
  • Impedance
  • Ionization
  • Ionizing Radiation
  • Measurement
  • Military Research
  • Physical Properties
  • Radiation
  • Resistance
  • Standards
  • Voltage

Readers

  • Plasma Physics.
  • Systems Analysis and Design

Technology Areas

  • Space
  • Space - Hall-Effect Thruster