Accession Number:

ADA106384

Title:

Multipole Expansion for Transient Electric and Magnetic Fields in an Internally Excited Spherical Cavity Containing Dampers of Finite Thickness with Distributed Electrical Properties

Descriptive Note:

Final rept. 1 Oct 1979-30 Sep 1980

Corporate Author:

ARNOLD ENGINEERING DEVELOPMENT CENTER ARNOLD AFB TN

Personal Author(s):

Report Date:

1981-10-01

Pagination or Media Count:

62.0

Abstract:

The multipole expansion coefficients needed to calculate transient electromagnetic fields and cavity frequency response in an internally excited, damped cavity are derived for an arbitrary but centralized distribution of source currents and an arbitrary number of dampers which have finite width. A block matrix procedure is devised to solve the N damper boundary value problems, but specific solutions are presented for the cases of zero, one, and two dampers. Also, the TM wave multipole coefficients for an uncapped biconical antenna used as excitation source are obtained in closed form, with use of Schelkunoffs mode solution for the antenna currents. Finally, coupled integrodifferential equations for the current distribution in the end caps and the conical sections of a capped bicone source are presented. This entire theory will be encoded to permit analysis of AEDC experiments.

Subject Categories:

  • Electrical and Electronic Equipment
  • Test Facilities, Equipment and Methods

Distribution Statement:

APPROVED FOR PUBLIC RELEASE