A deep magnetic field generating coil includes a plurality of turn portions. The turn portions are disposed along a direction by overlapping each other and form a spiral. The turn portions have a height (unit of meter) along the direction. The ratio of the number of the turn portions to the height is between 1 and 12000.一種深度磁場產生線圈包含複數匝部,該等匝部沿一方向重疊設置並形成一螺旋狀,且該等匝部沿該方向係具有一高度(單位為公尺),該等匝部之數量與該高度之比值係介於1與12000之間。1‧‧‧深度磁場產生線圈11‧‧‧匝部111‧‧‧導電元件112‧‧‧絕緣元件D‧‧‧內徑DP‧‧‧可加熱深度H1‧‧‧高度S‧‧‧空間
