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Journal Articles

Development of a high-brightness and low-divergence lithium neutral beam for a Zeeman polarimetry on JT-60U

Kojima, Atsushi; Kamiya, Kensaku; Iguchi, Harukazu*; Fujita, Takaaki; Kakiuchi, Hideto*; Kamada, Yutaka

Review of Scientific Instruments, 79(9), p.093502_1 - 093502_5, 2008/00

 Times Cited Count:9 Percentile:44.72(Instruments & Instrumentation)

A high-brightness and low-divergence neutral lithium beam is obtained for a Zeeman polarimetry of edge plasmas on JT-60U. In order to achieve high-brightness and low divergence angle simultaneously, the beam optics is designed after detailed numerical simulation taking the space charge effects into account. The newly-developed ion gun is operated on a test stand which simulates the diagnostic arrangement on JT-60U. The ion beam current of 10 mA is successfully extracted from the electron beam heated ion source. A sodium vapor neutralizer neutralizes the collimated ion beam fully at the temperature of 300$$^{circ}$$C. The neutral lithium beam is transported for 6.5 m long from the neutralizer. The HWHM radius of 26 mm and the equivalent beam current of 3 mA with the beam divergence angle of 0.2 degree are obtained. Those parameters satisfy the requirements of the Zeeman polarimetry. Furthermore, a long pulse extraction with a current of 10 mA and duration of 50 seconds is attained.

Journal Articles

Observation of radial particle transport induced by the fluctuation measured with a gold neutral beam probe

Kojima, Atsushi; Ishii, Kameo*; Miyata, Yoshiaki*; Kakiuchi, Hideto*; Kaido, Norihiro*; Yoshikawa, Masayuki*; Itakura, Akiyoshi*; Ichimura, Makoto*; Chujo, T.*

Fusion Science and Technology, 51(2T), p.274 - 276, 2007/02

 Times Cited Count:2 Percentile:19.85(Nuclear Science & Technology)

no abstracts in English

Oral presentation

Effects of the toroidal field ripple on the toroidal rotation in JT-60U

Yoshida, Maiko; Koide, Yoshihiko; Takenaga, Hidenobu; Urano, Hajime; Oyama, Naoyuki; Sakamoto, Yoshiteru; Kamiya, Kensaku; Kakiuchi, Hideto*; Kamada, Yutaka; JT-60 Team

no journal, , 

no abstracts in English

Oral presentation

Characteristics of plasma rotation and momentum transport with and without ferritic steel plates in JT-60U

Yoshida, Maiko; Koide, Yoshihiko; Takenaga, Hidenobu; Urano, Hajime; Oyama, Naoyuki; Sakamoto, Yoshiteru; Kamiya, Kensaku; Kakiuchi, Hideto*; Kamada, Yutaka; JT-60 Team

no journal, , 

no abstracts in English

Oral presentation

Development of the high-brightness and low-divergence lithium ion gun for the measurement of the edge current profile on JT-60U

Kojima, Atsushi; Kamiya, Kensaku; Kakiuchi, Hideto*; Iguchi, Harukazu*; Fujita, Takaaki; Kamada, Yutaka

no journal, , 

no abstracts in English

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