PROBLEM TO BE SOLVED: To make a field generation device comprising a superconductive bulk body compact, and improve cooling efficiency.SOLUTION: A field generation device 1 comprises: a superconductive bulk body 2 a cooling device 3 for cooling the superconductive bulk body 2 a vacuum container 8 having a structure for performing vacuum insulation of inside of it, and being formed of a tip end part 8a for storing the superconductive bulk body 2 and a flexible pipe part 8b which has flexibility to a connection direction of the cooling device 3 and the superconductive bulk body 2 and an adjustment part 13 for adjusting a flexible amount of the flexible pipe part 8b. The field generation device further comprises a thermal transmission body 6 in which, at least two bar-state members 6a, 6b, 6c for thermally connecting the superconductive bulk body 2 and the cooling device 3, are assembled each other. The thermal transmission body 6 is slidable to the connection direction of the cooling device 3 and the superconductive bulk body 2, and according to adjustment of the flexible amount of the flexible pipe part 8b by the adjustment part 13, length of the connection direction is varied, without contacting the vacuum container 8.SELECTED DRAWING: Figure 1COPYRIGHT: (C)2016,JPO&INPIT【課題】超電導バルク体を備えた磁場発生装置を小型化すると共に冷却効率を向上させる。【解決手段】超電導バルク体2と、超電導バルク体2を冷却する冷却装置3と、内部を真空断熱する構成を有すると共に、超電導バルク体2を収納する先端部8aおよび冷却装置3と超電導バルク体2との接続方向に対して伸縮性のあるフレキ管部8bから成る真空容器8と、フレキ管部8bの伸縮量を調整する調整部13とを備えた磁場発生装置1に、さらに、超電導バルク体2と冷却装置3とを熱的に接続する少なくとも2つの棒状部材6a、6b、6cが互いに組み合わされて成る熱伝導体6を設ける。熱伝導体6は、冷却装置3と超電導バルク体2との接続方向にスライド可能に構成され、かつ、調整部13によりフレキ管部8bの伸縮量が調整されるに伴って、真空容器8と接触せずに当該接続方向の長さが変わる特徴を備える。【選択図】図1
