6T超导扭摆磁铁的特殊真空问题

The Special Low Temperature Vacuum Problems of a 6T Superconducting Wiggler

6T超导扭摆磁铁的低温和磁铁系统以及HLS的储存环决定了Wiggler的真空问题的特殊性。两个LHe容器使磁体准直方便，LHe补充周期长。为了减小磁间隙，采用了77K低温薄壁真空束管，束管内应达2×10—8Pa的超高真空，特殊结构和材料允许来管直接通电烘烤。束管和磁体相对位置的调整简便准确。

The low temperature and magnet systems of a 6T superconducting Wiggler and HLS storage ring induce special vacuum problems of the Wiggler. Two LHe tanks are made for the alignment of the magnet and the extension of a period of refilling the LHe tanks. a low temperature beam pipe is adopted to reduce the gap of the magnet. The beam pipe can be baked directly passing a AC current through it using special construction and material. It is easy and accurate to adjust the relationship between the beam pipe and the magnet.