Showing papers by "Kaichiro Mishima published in 2008"
TL;DR: In this paper, the authors investigated the error reducing ways in fabricating an optical conical four-sensor probe from its basic principles and sought for a control technique to sharpen the optical fiber tip and a sensor assembling method for a four-Sensor probe.
42 citations
20 citations
TL;DR: In this article, the effect of radiation-induced surface activation (RISA) on the quenching speed was investigated on a vertical rod surface before and after 60Co γ-ray irradiation.
Abstract: In this study, reflooding experiments were performed on a vertical rod surface before and after γ-ray irradiation to see the effect of Radiation-Induced Surface Activation (RISA) on the quenching speed. The test section was an annular channel with a concentric inner rod made of stainless steel SUS304 and an outer tube made of quartz glass. The inner rod was irradiated by 60Co γ-rays with predetermined radiation intensity and period to improve the surface wettability based on the radiation-induced surface activation phenomenon. Prior to the reflooding experiments, the contact angle of a droplet on the inner rod surface was measured using a CCD camera. It was indicated that the irradiated surface wettability was clearly improved and the quenching speed was enhanced after γ-ray irradiation.
3 citations