传统小角中子谱仪的真空室采用分节结构,探测器置于真空筒后部并固定,当改变散射立体角区间时,需要拆除前部若干节筒,把探测器前移再封装。由于工作繁琐,效率不高,我们改进设计,采用一体的真空筒并配合先进的步进系统节省了整个谱仪的调整时间,提高了工作效率整个真空室是1个直 The vacuum chamber of the traditional small angle neutron spectrometer adopts a sectional structure. The detector is placed at the back of the vacuum cylinder and fixed. When changing the solid angle of scattering, several front cylinder sections need to be removed to move the detector forward and then encapsulate. Due to the cumbersome work and the low efficiency, we improve the design, adopt the integrated vacuum tube and cooperate with the advanced stepping system to save the whole spectrometer adjustment time and improve the work efficiency. The whole vacuum chamber is a straight