Intermediate downshifted maximum of stimulated electromagnetic emission at high‐power HF heating: A new twist on an old problem
Abstract
We report a new spectral feature of Stimulated Electromagnetic Emission (SEE) from the F region ionosphere observed during high‐power HF heating experiments at the SURA and High Frequency Active Auroral Research Program heating facilities. It is located in the SEE spectrum between the pump wave frequency f0 and the well‐known Downshifted Maximum and thus named the Intermediate Downshifted Maximum (IDM). IDM appears at effective radiated powers (ERP) P030 MW and the pump frequencies above electron gyroharmonics, (up to 250) kHz (s = 2, 3, 4). It mirrors the well‐known Upshifted Maximum (UM) relative to f0. The salient stationary and dynamic properties of IDM are described and discussed.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Jan 01, 2015
- Source ID
- 10.1002/2014ja020423
Entities
People
- A. V. Shindin
- E. N. Sergeev
- E. V. Mishin
- M. McCarrick
- S. M. Grach
Organizations
- Air Force Office of Scientific Research
- Air Force Research Laboratory
- N. I. Lobachevsky State University of Nizhny Novgorod
- NIRFI
- Russian Center for Science Information
- United States Naval Research Laboratory