in this research, a single-stage low-temperature hydrothermal synthesis route was successfully developed for preparation of iron disulfide. the prepared powder was characterized by x-ray diffraction (xrd) and scanning electron microscopy (sem). these analyses showed that nanoparticles were well crystallized, pyrite was the main product and the shape of crystals was nanorod. also, the influences...

A plasma source was developed at UCLA for planned underdense plasma lens experiments, where the plasma density is less than the electron beam density. The argon plasma, produced by a discharge between a LaB6 cathode at 1330 C and a tantalum anode, is con ned by a solenoidal magnetic eld and ows transversely across the electron beam path. Extensive test of the plasma source is under way for vari...

In relation to satellite applications like global navigation satellite systems (GNSS) and remote sensing, the electron density distribution of the ionosphere has significant influence on trans-ionospheric radio signal propagation. In this paper, we develop a novel ionospheric tomography approach providing the estimation of the electron density’s spatial covariance and based on a best linear unb...

On-chip electron sources have wide potential applications in miniature vacuum electronic devices and emission efficiency is one of their performance benchmarks. A cascade source based on series metal-insulator-metal horizontal tunneling junctions proposed, where free electrons are additively extracted from each junction. with n shows a theoretical approximately {\eta}(n)=1-(1-{\eta}_0 )^n, {\et...