@article{oai:nipr.repo.nii.ac.jp:00004156, author = {Ueda,Hiroko and Goodman,Simon and Matsumoto,Hiroshi and Okuzawa,Takashi}, journal = {Proceedings of the NIPR Symposium on Upper Atmosphere Physics}, month = {Jan}, note = {P(論文), We study the mechanism of stimulated electromagnetic emissions, called Broad Upshifted Maximum (BUM) feature observed in high-frequency ionospheric heating experiments with the aid of two-dimensional electromagnetic particle computer experiments. The pump is set up as an O-mode wave in the computer experiments propagating through the plasma with small-scale field aligned irregularity. A proposed theoretical study shows that the irregularity is important in the excitation mechanism. High-frequency electromagnetic emissions are observed, accompanied by electrostatic upper hybrid and lower hybrid waves in agreement with the theory.}, pages = {32--39}, title = {Influence of density irregularities on high-frequency wave propagation:Computer experiments of stimulated emissions}, volume = {7}, year = {1994} }