Accession Number : ADA569091


Title :   Physics of the Geospace Response to Powerful HF Radio Waves


Descriptive Note : Final rept. 1 Oct 2009-30 Sep 2012


Corporate Author : AIR FORCE RESEARCH LAB KIRTLAND AFB NM SPACE VEHICLES DIRECTORATE


Personal Author(s) : Mishin, Evgeny


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a569091.pdf


Report Date : 31 Oct 2012


Pagination or Media Count : 5


Abstract : This report describes the results of studies of the response of the Earth's space plasma to high-power HF radio waves from the High-frequency Active Auroral Research Program (HAARP) facility in Alaska under the 2010-2012 AFOSR task Physics of the Geospace Response to Powerful HF Radio Waves'. A first-principle model of a HF-created ionizing wave has been developed, quantitatively explaining the observed artificial plasma layers. The FLIP model has been adapted to the conditions of HF heating and explored to simulate artificial ducts. DMSP-HAARP experiments revealed that HF-created ion outflows and artificial density ducts in the topside ionosphere appeared faster than predicted by the models, pointing to kinetic (suprathermal) effects. CHAMP/GRACE-HAARP experiments presented the first evidence of F2-region atmospheric gravity waves generated by HF heating. A novel 3D numerical model of nonlinear interactions of lower hybrid waves with plasma particles has been explored. The resulting spectral energy distribution virtually reproduced the satellite observations.


Descriptors :   *RADIO WAVES , EARTH ATMOSPHERE , GRAVITY WAVES , HEATING , HIGH FREQUENCY , HIGH POWER , IONOSPHERE , PLASMAS(PHYSICS) , SPACE SCIENCES , SPECTRAL ENERGY DISTRIBUTION , THREE DIMENSIONAL


Subject Categories : Radiofrequency Wave Propagation


Distribution Statement : APPROVED FOR PUBLIC RELEASE