122 Ë 5 HTS Maglev experimental methods and set-up
Fig. 5.1:The properties of PMG for the investigation of magnetic levitation properties of HTS YBCO
bulk. (From Chang-Qing Ye and Dong-Hui Jiang).
A small columnar liquid nitrogen vessel with thin bottom has been developed [15,
16] in order to meet the needs of testing device and to verify the possibility of large-
size liquid nitrogen vessel with thin wall. The bottom thickness is only 3.5 mm (The
design thickness is 3 mm, but after the molding process the thickness is 3.5 mm).
The schematic, photograph, and vapor rate of of the small columnar liquid nitrogen
vessel with thin bottom are shown in Figs. 5.2–5.4, respectively. The outside and