Kojima A, Hanada M, Hilmi A, Inoue T, Watanabe K, Taniguchi M, Kashiwagi M, Umeda N, Tobari H, Kobayashi S, Yamano Y, Grisham L R
Japan Atomic Energy Agency, Naka, Ibaraki 311-0193, Japan.
Rev Sci Instrum. 2012 Feb;83(2):02B117. doi: 10.1063/1.3672471.
Vacuum insulation on a large size negative ion accelerator with multiple extraction apertures and acceleration grids for fusion application was experimentally examined and designed. In the experiment, vacuum insulation characteristics were investigated in the JT-60 negative ion source with >1000 apertures on the grid with the surface area of ∼2 m(2). The sustainable voltages varied with a square root of the gap lengths between the grids, and decreased with number of the apertures and with the surface area of the grids. Based on the obtained results, the JT-60SA (super advanced) negative ion source is designed to produce 22 A, 500 keV D(-) ion beams for 100 s.
对用于聚变应用的具有多个引出孔和加速栅极的大型负离子加速器的真空绝缘进行了实验研究和设计。在实验中，在JT-60负离子源中研究了真空绝缘特性，该源的栅极上有超过1000个孔，表面积约为2平方米。可持续电压随栅极之间间隙长度的平方根而变化，并随孔的数量和栅极的表面积而降低。基于所获得的结果，设计了JT-60SA（超级先进）负离子源，以产生22 A、500 keV的D(-)离子束，持续时间为100 s。
