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Development of beam source and bushing for ITER NB system

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Bibliographic Details
Title: Development of beam source and bushing for ITER NB system
Authors: Inoue, T. inoue.takashi52@jaea.go.jp, Hanada, M.1, Kashiwagi, M.1, Taniguchi, M.1, Tobari, H.1, Dairaku, M.1, Umeda, N.1, Watanabe, K.1, Sakamoto, K.1, Ikeda, Y.1
Source: Fusion Engineering & Design. Aug2007, Vol. 82 Issue 5-14, p813-818. 6p.
Subjects: Isostatic pressing, Powder metallurgy, Magnetic separators, High pressure (Technology)
Abstract: Abstract: The paper reports recent progress of R&D towards the beam source and HV bushing of the ITER Neutral Beam System. A new magnetic configuration with a “tent” magnetic filter was tested to suppress localization of fast electrons in a large negative ion source. The result was a drastic improvement of the negative ion uniformity with a beam intensity deviation less than ±4%. This fulfills the requirement of ITER (deviation ≤±5%). In a 1MeV accelerator development, experiment of high current beam acceleration is in progress. The H− ion beams of 0.24A has been obtained so far, at beam energy of 800keV. Concerning the insulator rings of the HV bushing, a new cold-isostatic press method was developed to press alumina powder to the ring form. Formation and sintering of a full-scale (1.56m in diameter) ceramic insulator ring was successfully completed without damages or cracks in the ceramic body. [Copyright &y& Elsevier]
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Database: Engineering Source
Description
Abstract:Abstract: The paper reports recent progress of R&D towards the beam source and HV bushing of the ITER Neutral Beam System. A new magnetic configuration with a “tent” magnetic filter was tested to suppress localization of fast electrons in a large negative ion source. The result was a drastic improvement of the negative ion uniformity with a beam intensity deviation less than ±4%. This fulfills the requirement of ITER (deviation ≤±5%). In a 1MeV accelerator development, experiment of high current beam acceleration is in progress. The H− ion beams of 0.24A has been obtained so far, at beam energy of 800keV. Concerning the insulator rings of the HV bushing, a new cold-isostatic press method was developed to press alumina powder to the ring form. Formation and sintering of a full-scale (1.56m in diameter) ceramic insulator ring was successfully completed without damages or cracks in the ceramic body. [Copyright &y& Elsevier]
ISSN:09203796
DOI:10.1016/j.fusengdes.2007.05.051