STUDY OF AN INVERSE-PINCH ELECTRIC DISCHARGE SOUND SOURCE,

Abstract

The electric discharge produced in water by an axisymmetric inverse-pinch electrode geometry was investigated as a sound source. Unlike an ordinary spark discharge sound source, the plasma produced by the inverse-pinch sound source is acted upon by a self-induced magnetic force which is always directed radially outward with respect to the axis of symmetry. Experimentally it was observed that at each capacitively stored energy level there exists a particular electrode spacing for which the magnitude of the peak pressure radiated will be a maximum. Whenever these latter conditions existed, the electric current was found to be a critically-damped discharge. A peak pressure of 206 psi was measured 1 yard from the source in water of zero salinity with 1920 joules of electric energy. (Author)

Document Details

Document Type
Technical Report
Publication Date
Mar 23, 1967
Accession Number
AD0821472

Entities

People

  • William J. Guman

Tags

DTIC Thesaurus Topics

  • Acoustics
  • Axisymmetric
  • Electric Current
  • Electric Discharges
  • Electrodes
  • Energy Levels
  • Geometry
  • Magnetic Forces
  • Salinity
  • Symmetry
  • Underwater Acoustics

Fields of Study

  • Physics

Readers

  • Geodesy
  • Mathematics or Statistics
  • Pulsed Power and Plasma Physics.

Technology Areas

  • Space
  • Space - Hall-Effect Thruster