Susumu Aiba

Artificially triggered lightning experiments to an EHV transmission line

In a triggered-lightning experiment carried out on a mountain in Japan, thirteen strikes were obtained for the winter seasons of 1986 and 1987. The lightning occurred on the conductor and the tower of a 275 kV test transmission line, on the ground, etc. The authors outline the triggering method and the experimental results obtained from electrical and optical observations. Comparatively intense lightning with a current greater than 50 kA or a charge greater than 200 C was obtained. >

Acoustic Domain for Characteristics Control of Amorphous Semiconductor

Acoustic domain is used to control the characteristics of amorphous semiconductor. Strong energy fluxes in an acoustic domain are injected into melt-quenched amorphous As2S3; the characteristics change is studied by the Brillouin scattering technique and X-ray diffraction. It is found that as frequency goes higher, a larger characteristics change is observed. 200×104 domain injections cause a similar effect to that due to furnace annealing at 180°C for 1 hour.

Frequency Spectrum of CdS Acoustic Domains for Acoustic Domain Injection Technique

The purpose of this paper is to study the frequency spectrum of the CdS acoustic domain generator to measure the physical parameters of II-VI or III-V compound semiconductors. It is concluded that the low frequency fluxes below 1 GHz are caused by the piezoelectric shock in the high resistivity region due to insufficient ohmic contact near the cathode electrode.