Kiyohide Baba

Applications of TiO2 film for environmental purification deposited by controlled electron beam-excited plasma

Abstract Taking advantage of the remarkable features of controlled electron beam-excited plasma (EBEP), the composition and the thickness of TiO 2 film could be directly controlled by the EBEP accelerating voltage V A and discharge current I D , respectively. Experiments were conducted on the dissolving effect on NO x (NO, NO 2 ) gas using glass beads coated with a TiO 2 film deposited by EBEP. With a bead sample size of 20 g and an NO gas flow rate of 100 ml/min, the NO dissolvable amount was approximately 10 −4 mol/m 2 for 120 min. Using a glass plate, glass beads and zeolites coated with TiO 2 film, the experiments succeeded in dissolving water-soluble ink and in obtaining a hydrophilic effect.

Recent findings on VLF/ELF sferics

Abstract Our recent activity on VLF/ELF sferics is reviewed, and this paper is composed of two parts. The first is a new method of estimating the propagation distance and ionospheric reflection height by using sophisticated signal processing for the dispersive tails of tweek sferics near the cutoff frequencies. In the second part, we have carried out the first attempt to apply our field-analysis direction finding (developed for whistlers) to tweek sferics; the corresponding experimental results and their interpretation are presented.

Large area electron-beam-excited plasma of meter size for industrial applications

Abstract In order to coat TiO 2 film over a large area for an industrial application, we have developed a large area electron-beam-excited plasma (EBEP) of meter size. Taking advantage of the remarkable features of controlled-EBEP, the composition and the thickness of TiO 2 film could be directly controlled by the accelerating voltage V A and the discharge current I D of EBEP, respectively. With this as background, we report here the R&D of EBEP of meter size for industrial applications.