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Journal Articles

Verification of optical fiber current transformer in nuclear fusion experimental device

Nishiyama, Tomokazu; Arai, Takashi; Hayashi, Takao; Yagyu, Junichi; Miya, Naoyuki; Abe, Mitsushi*

Dai-32-Kai Koha Senshingu Gijutsu Kenkyukai Koen Rombunshu, p.147 - 152, 2003/00

In a nuclear fusion equipment device, plasma discharges are expected to become a long time. In such a device an electromagnetic sensor that has a signal integrator to measure direct currents will cause a technical problem of zero point drift on signals. Furthermore, the development for solving the problem cause cost rise. Therefore, the detection device using new technology for direct current measurement, optical fiber current transformer (optical CT), was developed. Direct-current measurement of JT-60 was carried out using this detection device. A $$gamma$$ ray irradiation examination was also done to the optical CT.

Journal Articles

Role of the impurities in production rates of radiation-induced defects in silicon materials and solar cells

Khan, A.*; Yamaguchi, Masafumi*; Oshita, Yoshio*; Dharmarasu, N.*; Araki, Kenji*; Abe, Takao*; Ito, Hisayoshi; Oshima, Takeshi; Imaizumi, Mitsuru*; Matsuda, Sumio*

Journal of Applied Physics, 90(3), p.1170 - 1178, 2001/08

https://doi.org/10.1063/1.1384855
 Times Cited Count：56 Percentile：86.4(Physics, Applied)

1MeV-electron and 10MeV-proton irradiations into Si doped various impurities such as B, Ga, O and C were performed and residual defects in the Si were studied using DLTS and C-V measurements.It was revealed that Ci-Oi whose level is Ev-0.36 eV and Bi-Oi whose energy is Ec-0.18eV were generated. In Ga-doped Si, the generation of Ci-Oi was suppressed. Since Ci-Oi acts as scattering center, this result indicates that the radiation resistance of solar cells is improved by using Ga-doped Si substrates.Furthermore, a new defect level (Ev+18eV) was observed in Ga-dpoed Si by irradiation. This defect level was annealed out above 350 C.

Journal Articles

Experiment on surface cleaning by ultra violet ray irradiation

Hiroki, Seiji; Abe, Tetsuya; Murakami, Yoshio; *; *; *

Shinku, 31(10), p.850 - 853, 1988/10

https://doi.org/10.3131/jvsj.31.850

no abstracts in English

Oral presentation

Estimation of magnetic properties of (Ba$$_{x}$$Sr$$_{1-x}$$)$$_{3}$$Co$$_{2}$$Z-type ferrites as electromagnetic wave absorber

Nakagawa, Takashi*; Tada, Masaru*; Abe, Masanori*; Takada, Yukio*; Yamamoto, Takao*; Ishii, Yoshinobu; Igawa, Naoki

no journal, , 

no abstracts in English

Oral presentation

Magnetic structure and permeability of Co$$_{2}$$Z-type ferrite

Nakagawa, Takashi*; Tada, Masaru*; Abe, Masanori*; Takada, Yukio*; Tokunaga, Masatoshi*; Yamamoto, Takao*; Ishii, Yoshinobu*; Igawa, Naoki; Tachibana, Takeshi*

no journal, , 

no abstracts in English

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