JOPSS - Search Results

Journal Articles

Development of high voltage power supply system for ITER neutral beam injector

Tsuchida, Kazuki; Watanabe, Kazuhiro; Tobari, Hiroyuki; Takemoto, Jumpei; Yamanaka, Haruhiko; Inoue, Takashi

Denki Gakkai Kenkyukai Shiryo, Genshiryoku Kenkyukai (NE-11-001004 006010), p.17 - 22, 2011/09

A 1 MeV high-energy neutral beam injector is under developing for heating and current drive of ITER plasma in collaboration with EUDA. JADA will provide ultra-high voltage DC power supply components. Design of the 1 MV power supply, R&Ds on a HV bushing and a water choke will be presented. These results satisfy the requirements for the NBI system.

Journal Articles

Advanced high power technologies for fusion energy

Kasugai, Atsushi; Yamauchi, Kunihito

Denki Gakkai Kenkyukai Shiryo, Genshiryoku Kenkyukai (NE-11-001004 006010), p.1 - 3, 2011/09

Advanced high power technologies are essential for the realization of fusion energy. These technologies are also useful for the contribution to industrial and academic fields. In this paper, the vision and the issues of the advanced high power technologies are clarified.

Journal Articles

Developments of radio frequency heating systems for nuclear fusion

Kobayashi, Takayuki; Moriyama, Shinichi; Isayama, Akihiko; Hoshino, Katsumichi; Sakamoto, Keishi; Takahashi, Koji; Kajiwara, Ken; Oda, Yasuhisa; Kasugai, Atsushi

Denki Gakkai Kenkyukai Shiryo, Genshiryoku Kenkyukai (NE-11-6), p.11 - 15, 2011/09

The developments of radio frequency systems for plasma heating and current drive have been continued for magnetically-confined fusion devices, such as JT-60SA, ITER. The specifications of the systems are shown. Recent progress in the electron cyclotron range of frequency system developments, especially for the JT-60SA, is summarized.

Journal Articles

Detection technologies for nuclear security and non-proliferation

Kuno, Yusuke

Denki Gakkai Kenkyukai Shiryo, Genshiryoku Kenkyukai (NE-11-6), p.23 - 28, 2011/09

Terrorism and nuclear proliferation are the critical issues that world has currently encountered. Strengthening of nuclear security and nuclear non-proliferation is a common challenge throughout the worldwide nuclear societies, where development/improvement of the detection and measurement technologies for nuclear security and non-proliferation is one of the important measures in such a challenge. This paper discusses the current status and future needs in the area.

Journal Articles

Comparison of tokamak DEMO reactor concepts between Japan and Europe and present status of the United States

Takase, Haruhiko

Denki Gakkai Kenkyukai Shiryo, Genshiryoku Kenkyukai (NE-10-002), p.5 - 8, 2010/08

Tokamak DEMO reactor design concepts of Japan and Europe are presented and present status of reactor design activities in the United States is introduced in this paper. The design concept by Europe has a priority in the early realization of fusion energy while the development strategy by the United States has a priority in the economy. On the other hand, the design concept by Japan has an intermediate characteristic between both strategies.

Journal Articles

Plasma generation using high power microwave and application of space propulsion

Oda, Yasuhisa*; Komurasaki, Kimiya*; Takahashi, Koji; Kasugai, Atsushi; Sakamoto, Keishi

Denki Gakkai Kenkyukai Shiryo, Genshiryoku Kenkyukai (NE-04-1115), p.19 - 22, 2004/09

no abstracts in English

Journal Articles

Development of advanced antennas and diamond windows for ECH/CD in fusion reactor

Takahashi, Koji; Kasugai, Atsushi; Minami, Ryutaro; Sakamoto, Keishi; Ikeda, Yukiharu; Kobayashi, Noriyuki*; Imai, Tsuyoshi

Denki Gakkai Genshiryoku Kenkyukai Shiryo (NE-03-1), p.1 - 6, 2003/09

no abstracts in English

Journal Articles

Semiconductor radiation detectors and their measurement system

Katagiri, Masaki

Denki Gakkai Genshiryoku Kenkyukai Shiryo (NE-01-23), p.9 - 14, 2001/10

no abstracts in English

Journal Articles

Characteristics of a SrBPO $_{5}$ :Eu $^{2+}$ storage phosphor for neutron imaging

Sakasai, Kaoru; Katagiri, Masaki; To, Kentaro; Takahashi, Hiroyuki*; Nakazawa, Masaharu*; Kondo, Yasuhiro*

Denki Gakkai Genshiryoku Kenkyukai Shiryo (NE-01-8), p.41 - 46, 2001/09

A phosphor material such as SrBPO $_{5}$ :Eu $^{2+}$ has been investigated for two-dimensional imaging for pulsed-neutron source. The authors found this phosphor itself shows photostimulated luminescence (PSL) by illumination of 635 nm laser light after neutron irradiation without adding any neutron sensitive materials such as Gd. The PSL intensity per neutron flux was proportional to E $^{-0.5}$ , where E is neutron energy. The neutron sensitivity was increased by using enriched boron instead of natural boron. The S $_{gamma}$ /S $_{n}$ ratio of this phosphor using enriched boron was better than that of a commercially available imaging plate, where S $_{gamma}$ and S $_{n}$ are gamma and neutron sensitivities, respectively.