Earth, Moon, and Planets

, Volume 116, Issue 1, pp 55–66 | Cite as

“Twisted Beam” SEE Observations of Ionospheric Heating from HAARP

  • S. J. Briczinski
  • P. A. BernhardtEmail author
  • C. L. Siefring
  • S.-M. Han
  • T. R. Pedersen
  • W. A. Scales


Nonlinear interactions of high power HF radio waves in the ionosphere provide aeronomers with a unique space-based laboratory capability. The High-Frequency Active Auroral Research Program (HAARP) in Gakona, Alaska is the world’s largest heating facility, yielding effective radiated powers in the gigawatt range. New results are present from HAARP experiments using a “twisted beam” excitation mode. Analysis of twisted beam heating shows that the SEE results obtained are identical to more traditional patterns. One difference in the twisted beam mode is the heating region produced is in the shape of a ring as opposed to the more traditional “solid spot” region from a pencil beam. The ring heating pattern may be more conducive to the creation of stable artificial airglow layers because of the horizontal structure of the ring. The results of these runs include artificial layer creation and evolution as pertaining to the twisted beam pattern. The SEE measurements aid the interpretation of the twisted beam interactions in the ionosphere.


Ionospheric modification Orbital angular momentum Twisted beam 



The HAARP research at the Naval Research Laboratory was sponsored by DARPA and the NRL 6.1 Base Program.


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Copyright information

© Springer Science+Business Media Dordrecht (out side the USA) 2015

Authors and Affiliations

  • S. J. Briczinski
    • 1
  • P. A. Bernhardt
    • 1
    Email author
  • C. L. Siefring
    • 1
  • S.-M. Han
    • 1
  • T. R. Pedersen
    • 2
  • W. A. Scales
    • 3
  1. 1.Naval Research LaboratoryPlasma Physics DivisionWashingtonUSA
  2. 2.Air Force Research LaboratoryKirtland AFBUSA
  3. 3.Department of Electrical EngineeringVirginia TechBlacksburgUSA

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