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Journal Articles

Evaluation of two-stage system for neutron measurement aiming at increase in count rate at Japan Atomic Energy Agency - Fusion Neutronics Source

Shinohara, Koji; Ishii, Keiichi*; Ochiai, Kentaro; Baba, Mamoru*; Sukegawa, Atsuhiko; Sasao, Mamiko*; Kitajima, Sumio*

Review of Scientific Instruments, 85(11), p.11E823_1 - 11E823_4, 2014/11

 Times Cited Count:0 Percentile:0.01(Instruments & Instrumentation)

Journal Articles

Research and development of neutron detection system using scintillator and digital-signal processing

Shinohara, Koji; Ishii, Keiichi*; Ochiai, Kentaro; Baba, Mamoru*; Sasao, Mamiko*; Kitajima, Sumio*

Plasma and Fusion Research (Internet), 8, p.1402144_1 - 1402144_9, 2013/11

Journal Articles

Fast neutron-$$gamma$$ discrimination on neutron emission profile measurement on JT-60U

Ishii, Keiichi*; Shinohara, Koji; Ishikawa, Masao; Baba, Mamoru*; Isobe, Mitsutaka*; Okamoto, Atsushi*; Kitajima, Sumio*; Sasao, Mamiko*

Review of Scientific Instruments, 81(10), p.10D334_1 - 10D334_3, 2010/10

 Times Cited Count:6 Percentile:33.58(Instruments & Instrumentation)

Journal Articles

29th report of ITPA topical group meeting

Isayama, Akihiko; Sakakibara, Satoru*; Furukawa, Masaru*; Matsunaga, Go; Yamazaki, Kozo*; Watanabe, Kiyomasa*; Idomura, Yasuhiro; Sakamoto, Yoshiteru; Tanaka, Kenji*; Tamura, Naoki*; et al.

Purazuma, Kaku Yugo Gakkai-Shi, 86(6), p.374 - 377, 2010/06

no abstracts in English

Journal Articles

27th report of ITPA topical group meeting

Osakabe, Masaki*; Shinohara, Koji; Toi, Kazuo*; Todo, Yasushi*; Hamamatsu, Kiyotaka; Murakami, Sadayoshi*; Yamamoto, Satoshi*; Idomura, Yasuhiro; Sakamoto, Yoshiteru; Tanaka, Kenji*; et al.

Purazuma, Kaku Yugo Gakkai-Shi, 85(12), p.839 - 842, 2009/12

no abstracts in English

Journal Articles

Measurement of DT and DD neutrons with a TOF spectrometer for determination of fuel ion density ratio in ITER

Okada, Koichi*; Kondo, Keitaro; Ochiai, Kentaro; Sato, Satoshi; Konno, Chikara; Okamoto, Atsushi*; Kobuchi, Takashi*; Kitajima, Sumio*; Sasao, Mamiko*

Journal of Plasma and Fusion Research SERIES, Vol.8, p.666 - 669, 2009/09

Measurement of fuel ion density ratio, $$n$$$$_{rm D}$$/$$n$$$$_{rm T}$$, is required for burning control on ITER. The measured $$n$$$$_{rm D}$$/$$n$$$$_{rm T}$$ ratio must be fed back in real time. A neutron measurement system to measure $$n$$$$_{rm D}$$/$$n$$$$_{rm T}$$ should be operable at high counting rate. It is estimated that the number of emitted DT neutrons is 200 times higher than that of DD neutrons under the condition of ITER standard operation. A neutron measurement system was developed using a DT/DD generator, where DT neutrons are dominant and DD neutrons are contaminated slightly in the neutron beam. The measurement instrument was a TOF spectrometer. Signals originating from each neutron must be distinguished in order to measure the fuel ratio. We developed a circuit system with discrimination windows to distinguish each signal pulse, and DT and DD neutrons were measured separately and simultaneously with this system. The experimental result indicates a possibility that this system is suitable for measurement of fuel ion density ratio on ITER.

Journal Articles

Report on ITPA meetings, 24

Idomura, Yasuhiro; Yoshida, Maiko; Yagi, Masatoshi*; Tanaka, Kenji*; Hayashi, Nobuhiko; Sakamoto, Yoshiteru; Tamura, Naoki*; Oyama, Naoyuki; Urano, Hajime; Aiba, Nobuyuki; et al.

Purazuma, Kaku Yugo Gakkai-Shi, 84(12), p.952 - 955, 2008/12

no abstracts in English

Oral presentation

Development of neutron spectrometer for measurement of fuel ratio planned on ITER

Nishitani, Takeo; Okada, Koichi; Sato, Satoshi; Sasao, Mamiko*; Iwasaki, Tomohiko*; Sugawara, Takanori; Shinto, Katsuhiro*; Kitajima, Sumio*; Nomura, Ken*

no journal, , 

no abstracts in English

Oral presentation

Development of simultaneous measurement for DT and DD neutrons by TOF method

Okada, Koichi; Kondo, Keitaro; Sato, Satoshi; Nishitani, Takeo; Nomura, Ken*; Okamoto, Atsushi*; Iwasaki, Tomohiko*; Kitajima, Sumio*; Sasao, Mamiko*

no journal, , 

no abstracts in English

Oral presentation

Development of the method of fuel ratio measurement with neutron measurement planned on ITER experiments

Okada, Koichi; Kondo, Keitaro; Ochiai, Kentaro; Sato, Satoshi; Konno, Chikara; Nishitani, Takeo; Nomura, Ken*; Okamoto, Atsushi*; Kitajima, Sumio*; Sasao, Mamiko*

no journal, , 

no abstracts in English

Oral presentation

Measurement of neutron for particles control in burning plasma

Okada, Koichi*; Kondo, Keitaro; Ochiai, Kentaro; Sato, Satoshi; Konno, Chikara; Okamoto, Atsushi*; Kobuchi, Takashi*; Kitajima, Sumio*; Sasao, Mamiko*

no journal, , 

no abstracts in English

Oral presentation

ELM study using neutron profile monitor on JT-60U

Ishii, Keiichi*; Shinohara, Koji; Oyama, Naoyuki; Nakano, Tomohide; Ishikawa, Masao; Baba, Mamoru*; Isobe, Mitsutaka*; Kitajima, Sumio*; Sasao, Mamiko*

no journal, , 

no abstracts in English

Oral presentation

Characteristics of stilbene detectors for DD neutrons using digital signal processing

Ishii, Keiichi*; Shinohara, Koji; Takakura, Kosuke; Ochiai, Kentaro; Isobe, Mitsutaka*; Baba, Mamoru*; Kashiwa, Soichiro*; Okamoto, Atsushi*; Kitajima, Sumio*; Sasao, Mamiko*

no journal, , 

no abstracts in English

Oral presentation

Measurement of response on d-T neutrons of two-stage system for neutron emission profile measurement using a neutron beam at FNS

Shinohara, Koji; Ishii, Keiichi*; Ochiai, Kentaro; Baba, Mamoru*; Sasao, Mamiko*; Kitajima, Sumio*

no journal, , 

14 (Records 1-14 displayed on this page)
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