Stimulated electromagnetic emission polarization under different polarizations of pump waves

摘要

The results of investigations into the stimulated electromagnetic emission(SEE) polarization under different modes of the pump wave polarization arepresented. The present results were obtained in November 2012 during aheating campaign utilizing the SPEAR (Space Plasma Exploration by ActiveRadar) heating facility, transmitting in both O- and X-mode polarization, anda PGI (Polar Geophysical Institute) radio interferometer capable of recordingthe polarization of the received radiation. The polarization ellipseparameters of the SEE DM (downshifted maximum) components were determinedunder both O-mode and X-mode polarization of the pump waves. The polarizationdirection of the SEE DM component was preserved under different polarizationsof the pump waves. Different polarizations of the pump waves have a differentSEE generation efficiency. The intensity of the DM component is observed tobe greater during O-mode pumping. In addition, the numbers of observed SEEfeatures are also greater during O-mode pumping.