Accession Number:

AD1104269

Title:

Collaborative Research on Novel High-Power Sources for Physics of Ionospheric Modification

Descriptive Note:

Technical Report,15 Dec 2013,31 Dec 2019

Corporate Author:

MARYLAND UNIV COLLEGE PARK College Park United States

Personal Author(s):

Report Date:

2020-01-16

Pagination or Media Count:

54.0

Abstract:

This final report documents work conducted as part of a Multi-disciplinary University Research Initiative MURI in the area of active Ionospheric Modification IM. The efforts involved four groups the University of Maryland Space Plasma PhysicsSPP group, the University of California, Los Angeles experimental space plasma simulation group, the Texas Tech TTechpulsed power group, and the University of Maryland Charged Particle Beam CPB group. Work was divided along two interacting lines. First, UMD SPP and UCLA investigated possible mechanisms for controlling the performance of trans-ionospheric communication systems, improving the performance of submarine ELFVLF communication systems, and possible mechanisms for controlling the flux of energetic particles trapped in the Radiation BeltsRB. These space plasma physics studies set the specifications for the next generation of IM heaters addressed by the TTech and UMD CPB groups. A key difficulty concerning applications of IM is that the current research and applications rely on large permanent facilities mostly at high latitudes. The current MURI focused in the development of relatively small mobile or at least transportable facilities. The demands placed on such a transportable heater, primarily its reduced footprint in comparison with HAARP, drove the study of high efficiency sources and compact antennas. The sources investigated included laser driven Photo Conductive Solid State PCSS switches at TTech and high power, class D Tetrodes Pentodes Inductive Output Tubes IOTs at UMD. High efficiency sub-wavelength antennas were studied at TTech.

Subject Categories:

  • Astrophysics
  • Atmospheric Physics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE