Confined alpha particle diagnostic system using an energetic He0 beam for ITER

M. Sasao; K. Shinto; M. Isobe; M. Nishiura; O. Kaneko; M. Wada; C. I. Walker; S. Kitajima; A. Okamoto; H. Sugawara; S. Takeuchi; N. Tanaka; H. Aoyama; M. Kisaki

doi:10.1063/1.2347699

Confined alpha particle diagnostic system using an energetic He₀ beam for ITER

M. Sasao, K. Shinto, M. Isobe, M. Nishiura, O. Kaneko, M. Wada, C. I. Walker, S. Kitajima, A. Okamoto, H. Sugawara, S. Takeuchi, N. Tanaka, H. Aoyama, M. Kisaki

研究成果: Article › 査読

13 被引用数 (Scopus)

抄録

The beam neutralization system for measurement of the spatial and velocity distributions of alpha particles of ITER plasmas was studied. As forward angle detection against the beam injection direction is required for effective neutralization, arrangement of the measurement system using possible ports in ITER configuration is proposed. The count rate of neutralized alpha particles produced by the double charge exchange interaction with energetic He0 beam particles injected is estimated. The ratios of signal to neutron-induced noise are evaluated. When a He0 beam produced by autodetachment from a 1-1.5 MeV He- beam of 10 mA is injected, the signal to noise ratio becomes greater than 1 at ρ <0.4, even without beam modulation. Usage of a lock-in technique at the frequency of radio-frequency quadrapole accelerator will make measurement at the outer region possible.

本文言語	English
論文番号	10F130
ジャーナル	Review of Scientific Instruments
巻	77
号	10
DOI	https://doi.org/10.1063/1.2347699
出版ステータス	Published - 2006
外部発表	はい

ASJC Scopus subject areas

器械工学

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10.1063/1.2347699

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引用スタイル

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title = "Confined alpha particle diagnostic system using an energetic He0 beam for ITER",

abstract = "The beam neutralization system for measurement of the spatial and velocity distributions of alpha particles of ITER plasmas was studied. As forward angle detection against the beam injection direction is required for effective neutralization, arrangement of the measurement system using possible ports in ITER configuration is proposed. The count rate of neutralized alpha particles produced by the double charge exchange interaction with energetic He0 beam particles injected is estimated. The ratios of signal to neutron-induced noise are evaluated. When a He0 beam produced by autodetachment from a 1-1.5 MeV He- beam of 10 mA is injected, the signal to noise ratio becomes greater than 1 at ρ <0.4, even without beam modulation. Usage of a lock-in technique at the frequency of radio-frequency quadrapole accelerator will make measurement at the outer region possible.",

author = "M. Sasao and K. Shinto and M. Isobe and M. Nishiura and O. Kaneko and M. Wada and Walker, {C. I.} and S. Kitajima and A. Okamoto and H. Sugawara and S. Takeuchi and N. Tanaka and H. Aoyama and M. Kisaki",

note = "Funding Information: This work was supported by a Grant-in-Aid from the Ministry of Education, Culture, Sports, Science, and Technology of Japan, “Priority Area of Advanced Burning Plasma Diagnostics.”",

year = "2006",

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AU - Sasao, M.

AU - Shinto, K.

AU - Isobe, M.

AU - Nishiura, M.

AU - Kaneko, O.

AU - Wada, M.

AU - Walker, C. I.

AU - Kitajima, S.

AU - Okamoto, A.

AU - Sugawara, H.

AU - Takeuchi, S.

AU - Tanaka, N.

AU - Aoyama, H.

AU - Kisaki, M.

N1 - Funding Information: This work was supported by a Grant-in-Aid from the Ministry of Education, Culture, Sports, Science, and Technology of Japan, “Priority Area of Advanced Burning Plasma Diagnostics.”

PY - 2006

Y1 - 2006

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