Development of beam source and bushing for ITER NB system
Development of beam source and bushing for ITER NB system
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ITER NB系统束源和套管的开发
DOI：
10.1016/j.fusengdes.2007.05.051
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发表时间：
2007
期刊：
影响因子：
--
通讯作者：
Y. Ikeda
中科院分区：
文献类型：
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作者：
T. Inoue;M. Hanada;M. Kashiwagi;M. Taniguchi;H. Tobari;M. Dairaku;N. Umeda;K. Watanabe;K. Sakamoto;Y. Ikeda
本文报道了ITER中性束系统束源和高压套管的最新研究进展。在大型负离子源中，采用了一种新的磁结构，即“帐篷”式磁过滤器来抑制快电子的局域化。结果是负离子均匀性的显著改善，束流强度偏差小于± 4%。这符合ITER的要求（偏差≤±5%）。在1MeV加速器研制中，强流束流加速实验正在进行。到目前为止，在800keV的束流能量下，已经获得了0.24A的H−离子束。针对高压套管绝缘子环，提出了一种新的冷等静压成型方法。成功地完成了全尺寸（直径1.56 m）陶瓷绝缘子环的成型和烧结，陶瓷体无损伤或裂纹。
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.